./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_hash_iter_delete_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b1f3bc8-883c-4220-b4f2-c5d643c576b5/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b1f3bc8-883c-4220-b4f2-c5d643c576b5/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b1f3bc8-883c-4220-b4f2-c5d643c576b5/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b1f3bc8-883c-4220-b4f2-c5d643c576b5/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_hash_iter_delete_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b1f3bc8-883c-4220-b4f2-c5d643c576b5/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b1f3bc8-883c-4220-b4f2-c5d643c576b5/bin/utaipan-verify-SwPr7d2a91 --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 7608d8aa64807891206ad38b93db31434f261f46ffbbb3a8b8a4940e4ab5ce81 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-25 00:07:01,769 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-25 00:07:01,911 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b1f3bc8-883c-4220-b4f2-c5d643c576b5/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-25 00:07:01,923 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-25 00:07:01,924 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-25 00:07:01,972 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-25 00:07:01,973 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-25 00:07:01,974 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-25 00:07:01,975 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-25 00:07:01,980 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-25 00:07:01,981 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-25 00:07:01,982 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-25 00:07:01,983 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-25 00:07:01,984 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-25 00:07:01,985 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-25 00:07:01,985 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-25 00:07:01,986 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-25 00:07:01,986 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-25 00:07:01,986 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-25 00:07:01,987 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-25 00:07:01,989 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-25 00:07:01,989 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-25 00:07:01,991 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-25 00:07:01,991 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-25 00:07:01,992 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-25 00:07:01,992 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-25 00:07:01,993 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-25 00:07:01,993 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-25 00:07:01,994 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-25 00:07:01,994 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-25 00:07:01,995 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-25 00:07:01,996 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-25 00:07:01,996 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-25 00:07:01,996 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-25 00:07:01,997 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:07:01,997 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-25 00:07:01,997 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-25 00:07:01,997 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-25 00:07:01,998 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-25 00:07:01,998 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-25 00:07:01,998 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-25 00:07:01,999 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-25 00:07:01,999 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-25 00:07:01,999 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-25 00:07:02,000 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_6b1f3bc8-883c-4220-b4f2-c5d643c576b5/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b1f3bc8-883c-4220-b4f2-c5d643c576b5/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7608d8aa64807891206ad38b93db31434f261f46ffbbb3a8b8a4940e4ab5ce81 [2023-11-25 00:07:02,322 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-25 00:07:02,360 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-25 00:07:02,364 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-25 00:07:02,365 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-25 00:07:02,366 INFO L274 PluginConnector]: CDTParser initialized [2023-11-25 00:07:02,367 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b1f3bc8-883c-4220-b4f2-c5d643c576b5/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/aws-c-common/aws_hash_iter_delete_harness.i [2023-11-25 00:07:05,567 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-25 00:07:06,367 INFO L384 CDTParser]: Found 1 translation units. [2023-11-25 00:07:06,370 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b1f3bc8-883c-4220-b4f2-c5d643c576b5/sv-benchmarks/c/aws-c-common/aws_hash_iter_delete_harness.i [2023-11-25 00:07:06,421 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b1f3bc8-883c-4220-b4f2-c5d643c576b5/bin/utaipan-verify-SwPr7d2a91/data/963a59599/36dc14dd46774c5690ec080fe4377b95/FLAG4ac78ec08 [2023-11-25 00:07:06,439 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b1f3bc8-883c-4220-b4f2-c5d643c576b5/bin/utaipan-verify-SwPr7d2a91/data/963a59599/36dc14dd46774c5690ec080fe4377b95 [2023-11-25 00:07:06,443 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-25 00:07:06,445 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-25 00:07:06,446 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-25 00:07:06,447 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-25 00:07:06,458 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-25 00:07:06,459 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:07:06" (1/1) ... [2023-11-25 00:07:06,460 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e266592 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:07:06, skipping insertion in model container [2023-11-25 00:07:06,460 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:07:06" (1/1) ... [2023-11-25 00:07:06,676 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-25 00:07:07,117 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_6b1f3bc8-883c-4220-b4f2-c5d643c576b5/sv-benchmarks/c/aws-c-common/aws_hash_iter_delete_harness.i[4494,4507] [2023-11-25 00:07:07,126 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_6b1f3bc8-883c-4220-b4f2-c5d643c576b5/sv-benchmarks/c/aws-c-common/aws_hash_iter_delete_harness.i[4554,4567] [2023-11-25 00:07:08,440 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:07:08,441 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:07:08,441 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:07:08,442 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:07:08,444 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:07:08,459 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:07:08,460 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:07:08,462 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:07:08,463 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:07:08,465 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:07:08,466 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:07:08,467 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:07:08,468 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:07:09,016 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-25 00:07:09,017 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-25 00:07:09,018 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-25 00:07:09,020 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-25 00:07:09,022 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-25 00:07:09,022 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-25 00:07:09,023 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-25 00:07:09,024 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-25 00:07:09,025 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-25 00:07:09,026 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-25 00:07:09,636 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:07:09,637 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:07:09,661 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:07:09,663 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:07:09,669 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:07:09,670 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:07:09,685 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:07:09,686 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:07:09,687 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:07:09,688 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:07:09,688 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:07:09,689 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:07:09,689 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:07:09,772 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:07:09,805 INFO L202 MainTranslator]: Completed pre-run [2023-11-25 00:07:09,818 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_6b1f3bc8-883c-4220-b4f2-c5d643c576b5/sv-benchmarks/c/aws-c-common/aws_hash_iter_delete_harness.i[4494,4507] [2023-11-25 00:07:09,819 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_6b1f3bc8-883c-4220-b4f2-c5d643c576b5/sv-benchmarks/c/aws-c-common/aws_hash_iter_delete_harness.i[4554,4567] [2023-11-25 00:07:09,853 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:07:09,853 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:07:09,854 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:07:09,854 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:07:09,855 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:07:09,861 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:07:09,861 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:07:09,862 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:07:09,863 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:07:09,864 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:07:09,864 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:07:09,865 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:07:09,865 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:07:09,894 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-25 00:07:09,895 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-25 00:07:09,896 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-25 00:07:09,897 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-25 00:07:09,898 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-25 00:07:09,898 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-25 00:07:09,899 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-25 00:07:09,899 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-25 00:07:09,899 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-25 00:07:09,900 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-25 00:07:09,932 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7558-7569] [2023-11-25 00:07:10,038 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:07:10,039 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:07:10,047 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:07:10,048 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:07:10,051 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:07:10,052 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:07:10,067 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:07:10,067 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:07:10,068 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:07:10,068 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:07:10,069 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:07:10,069 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:07:10,069 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:07:10,093 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:07:10,374 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:07:10,375 WARN L675 CHandler]: The function equals_fn is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:07:10,375 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:07:10,375 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:07:10,375 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:07:10,375 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:07:10,375 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:07:10,376 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:07:10,376 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:07:10,376 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:07:10,376 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:07:10,376 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:07:10,377 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:07:10,377 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:07:10,377 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:07:10,377 WARN L675 CHandler]: The function callback is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:07:10,377 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:07:10,378 WARN L675 CHandler]: The function aws_array_list_ensure_capacity is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:07:10,385 INFO L206 MainTranslator]: Completed translation [2023-11-25 00:07:10,386 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:07:10 WrapperNode [2023-11-25 00:07:10,386 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-25 00:07:10,387 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-25 00:07:10,388 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-25 00:07:10,388 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-25 00:07:10,395 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:07:10" (1/1) ... [2023-11-25 00:07:10,545 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:07:10" (1/1) ... [2023-11-25 00:07:10,622 INFO L138 Inliner]: procedures = 772, calls = 2461, calls flagged for inlining = 66, calls inlined = 11, statements flattened = 749 [2023-11-25 00:07:10,623 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-25 00:07:10,624 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-25 00:07:10,624 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-25 00:07:10,624 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-25 00:07:10,634 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:07:10" (1/1) ... [2023-11-25 00:07:10,634 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:07:10" (1/1) ... [2023-11-25 00:07:10,645 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:07:10" (1/1) ... [2023-11-25 00:07:10,645 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:07:10" (1/1) ... [2023-11-25 00:07:10,686 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:07:10" (1/1) ... [2023-11-25 00:07:10,693 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:07:10" (1/1) ... [2023-11-25 00:07:10,703 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:07:10" (1/1) ... [2023-11-25 00:07:10,709 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:07:10" (1/1) ... [2023-11-25 00:07:10,722 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-25 00:07:10,723 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-25 00:07:10,723 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-25 00:07:10,723 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-25 00:07:10,724 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:07:10" (1/1) ... [2023-11-25 00:07:10,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:07:10,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b1f3bc8-883c-4220-b4f2-c5d643c576b5/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:07:10,773 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b1f3bc8-883c-4220-b4f2-c5d643c576b5/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-25 00:07:10,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b1f3bc8-883c-4220-b4f2-c5d643c576b5/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-25 00:07:10,837 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2023-11-25 00:07:10,838 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-25 00:07:10,838 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-25 00:07:10,838 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-25 00:07:10,838 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-25 00:07:10,838 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-25 00:07:10,839 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-25 00:07:10,839 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-25 00:07:10,840 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_is_valid [2023-11-25 00:07:10,840 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_is_valid [2023-11-25 00:07:10,840 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-25 00:07:10,840 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-25 00:07:10,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-25 00:07:10,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-25 00:07:10,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-25 00:07:10,841 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-25 00:07:10,843 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-25 00:07:10,843 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-11-25 00:07:10,843 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-11-25 00:07:10,843 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-25 00:07:10,843 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-25 00:07:10,844 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-25 00:07:10,844 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2023-11-25 00:07:10,844 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2023-11-25 00:07:10,844 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-25 00:07:10,844 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-11-25 00:07:10,844 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-11-25 00:07:10,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-25 00:07:10,845 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_power_of_two [2023-11-25 00:07:10,845 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_power_of_two [2023-11-25 00:07:10,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-25 00:07:10,846 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_required_bytes [2023-11-25 00:07:10,846 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_required_bytes [2023-11-25 00:07:10,846 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2023-11-25 00:07:10,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2023-11-25 00:07:10,847 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-25 00:07:10,847 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-25 00:07:10,847 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_iter_is_valid [2023-11-25 00:07:10,847 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_iter_is_valid [2023-11-25 00:07:10,847 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_is_valid [2023-11-25 00:07:10,847 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_is_valid [2023-11-25 00:07:10,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-25 00:07:10,848 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-11-25 00:07:10,848 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-11-25 00:07:10,848 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2023-11-25 00:07:10,849 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2023-11-25 00:07:10,849 INFO L130 BoogieDeclarations]: Found specification of procedure s_remove_entry [2023-11-25 00:07:10,850 INFO L138 BoogieDeclarations]: Found implementation of procedure s_remove_entry [2023-11-25 00:07:10,850 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_iter_delete [2023-11-25 00:07:10,850 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_iter_delete [2023-11-25 00:07:10,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-25 00:07:11,289 INFO L241 CfgBuilder]: Building ICFG [2023-11-25 00:07:11,295 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-25 00:07:11,596 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume !true; [2023-11-25 00:07:11,596 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##47: assume !true; [2023-11-25 00:07:12,688 INFO L282 CfgBuilder]: Performing block encoding [2023-11-25 00:07:13,145 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-25 00:07:13,146 INFO L309 CfgBuilder]: Removed 7 assume(true) statements. [2023-11-25 00:07:13,148 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:07:13 BoogieIcfgContainer [2023-11-25 00:07:13,148 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-25 00:07:13,153 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-25 00:07:13,154 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-25 00:07:13,158 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-25 00:07:13,158 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 12:07:06" (1/3) ... [2023-11-25 00:07:13,167 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38fbad52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:07:13, skipping insertion in model container [2023-11-25 00:07:13,168 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:07:10" (2/3) ... [2023-11-25 00:07:13,169 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38fbad52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:07:13, skipping insertion in model container [2023-11-25 00:07:13,169 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:07:13" (3/3) ... [2023-11-25 00:07:13,172 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_hash_iter_delete_harness.i [2023-11-25 00:07:13,195 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-25 00:07:13,196 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-25 00:07:13,258 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-25 00:07:13,266 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;@5de4014a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-25 00:07:13,266 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-25 00:07:13,272 INFO L276 IsEmpty]: Start isEmpty. Operand has 167 states, 94 states have (on average 1.202127659574468) internal successors, (113), 93 states have internal predecessors, (113), 54 states have call successors, (54), 19 states have call predecessors, (54), 19 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2023-11-25 00:07:13,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-11-25 00:07:13,293 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:07:13,294 INFO L195 NwaCegarLoop]: trace histogram [19, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:07:13,294 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:07:13,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:07:13,301 INFO L85 PathProgramCache]: Analyzing trace with hash -2105179692, now seen corresponding path program 1 times [2023-11-25 00:07:13,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:07:13,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038401323] [2023-11-25 00:07:13,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:07:13,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:07:13,819 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:07:13,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1628558197] [2023-11-25 00:07:13,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:07:13,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:07:13,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b1f3bc8-883c-4220-b4f2-c5d643c576b5/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:07:13,836 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b1f3bc8-883c-4220-b4f2-c5d643c576b5/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:07:13,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b1f3bc8-883c-4220-b4f2-c5d643c576b5/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-25 00:07:14,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:07:14,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 2489 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-25 00:07:14,686 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:07:14,812 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2023-11-25 00:07:14,812 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:07:14,812 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:07:14,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038401323] [2023-11-25 00:07:14,813 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:07:14,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628558197] [2023-11-25 00:07:14,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628558197] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:07:14,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:07:14,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-25 00:07:14,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120505756] [2023-11-25 00:07:14,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:07:14,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-25 00:07:14,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:07:14,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-25 00:07:14,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:07:14,882 INFO L87 Difference]: Start difference. First operand has 167 states, 94 states have (on average 1.202127659574468) internal successors, (113), 93 states have internal predecessors, (113), 54 states have call successors, (54), 19 states have call predecessors, (54), 19 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) Second operand has 5 states, 4 states have (on average 14.0) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (32), 3 states have call predecessors, (32), 2 states have call successors, (32) [2023-11-25 00:07:15,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:07:15,480 INFO L93 Difference]: Finished difference Result 304 states and 413 transitions. [2023-11-25 00:07:15,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-25 00:07:15,483 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 14.0) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (32), 3 states have call predecessors, (32), 2 states have call successors, (32) Word has length 146 [2023-11-25 00:07:15,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:07:15,495 INFO L225 Difference]: With dead ends: 304 [2023-11-25 00:07:15,495 INFO L226 Difference]: Without dead ends: 169 [2023-11-25 00:07:15,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:07:15,505 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 1 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-25 00:07:15,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 736 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-25 00:07:15,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-11-25 00:07:15,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2023-11-25 00:07:15,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 94 states have (on average 1.1595744680851063) internal successors, (109), 95 states have internal predecessors, (109), 54 states have call successors, (54), 19 states have call predecessors, (54), 20 states have return successors, (54), 54 states have call predecessors, (54), 53 states have call successors, (54) [2023-11-25 00:07:15,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 217 transitions. [2023-11-25 00:07:15,574 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 217 transitions. Word has length 146 [2023-11-25 00:07:15,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:07:15,576 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 217 transitions. [2023-11-25 00:07:15,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 14.0) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (32), 3 states have call predecessors, (32), 2 states have call successors, (32) [2023-11-25 00:07:15,576 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 217 transitions. [2023-11-25 00:07:15,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-11-25 00:07:15,581 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:07:15,582 INFO L195 NwaCegarLoop]: trace histogram [19, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:07:15,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b1f3bc8-883c-4220-b4f2-c5d643c576b5/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-25 00:07:15,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b1f3bc8-883c-4220-b4f2-c5d643c576b5/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-25 00:07:15,793 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:07:15,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:07:15,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1419450348, now seen corresponding path program 1 times [2023-11-25 00:07:15,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:07:15,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282759390] [2023-11-25 00:07:15,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:07:15,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:07:15,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:07:18,713 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2023-11-25 00:07:18,714 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:07:18,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282759390] [2023-11-25 00:07:18,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282759390] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:07:18,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:07:18,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-25 00:07:18,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811441574] [2023-11-25 00:07:18,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:07:18,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-25 00:07:18,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:07:18,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-25 00:07:18,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-25 00:07:18,718 INFO L87 Difference]: Start difference. First operand 169 states and 217 transitions. Second operand has 8 states, 6 states have (on average 9.333333333333334) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (33), 4 states have call predecessors, (33), 4 states have call successors, (33) [2023-11-25 00:07:19,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:07:19,895 INFO L93 Difference]: Finished difference Result 290 states and 376 transitions. [2023-11-25 00:07:19,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-25 00:07:19,896 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 9.333333333333334) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (33), 4 states have call predecessors, (33), 4 states have call successors, (33) Word has length 150 [2023-11-25 00:07:19,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:07:19,901 INFO L225 Difference]: With dead ends: 290 [2023-11-25 00:07:19,901 INFO L226 Difference]: Without dead ends: 171 [2023-11-25 00:07:19,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-25 00:07:19,904 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 6 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:07:19,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 822 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-25 00:07:19,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2023-11-25 00:07:19,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2023-11-25 00:07:19,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 95 states have (on average 1.1578947368421053) internal successors, (110), 97 states have internal predecessors, (110), 54 states have call successors, (54), 19 states have call predecessors, (54), 21 states have return successors, (55), 54 states have call predecessors, (55), 53 states have call successors, (55) [2023-11-25 00:07:19,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 219 transitions. [2023-11-25 00:07:19,929 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 219 transitions. Word has length 150 [2023-11-25 00:07:19,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:07:19,930 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 219 transitions. [2023-11-25 00:07:19,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 9.333333333333334) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (33), 4 states have call predecessors, (33), 4 states have call successors, (33) [2023-11-25 00:07:19,931 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 219 transitions. [2023-11-25 00:07:19,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-11-25 00:07:19,934 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:07:19,934 INFO L195 NwaCegarLoop]: trace histogram [19, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:07:19,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-25 00:07:19,935 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:07:19,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:07:19,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1888028867, now seen corresponding path program 1 times [2023-11-25 00:07:19,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:07:19,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453095921] [2023-11-25 00:07:19,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:07:19,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:07:20,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:07:21,653 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2023-11-25 00:07:21,653 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:07:21,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453095921] [2023-11-25 00:07:21,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453095921] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:07:21,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56435155] [2023-11-25 00:07:21,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:07:21,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:07:21,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b1f3bc8-883c-4220-b4f2-c5d643c576b5/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:07:21,656 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b1f3bc8-883c-4220-b4f2-c5d643c576b5/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:07:21,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b1f3bc8-883c-4220-b4f2-c5d643c576b5/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-25 00:07:22,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:07:22,295 INFO L262 TraceCheckSpWp]: Trace formula consists of 2512 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-25 00:07:22,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:07:22,505 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 [2023-11-25 00:07:22,858 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2023-11-25 00:07:22,858 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:07:22,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56435155] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:07:22,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:07:22,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [8] total 18 [2023-11-25 00:07:22,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516973697] [2023-11-25 00:07:22,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:07:22,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-25 00:07:22,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:07:22,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-25 00:07:22,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2023-11-25 00:07:22,862 INFO L87 Difference]: Start difference. First operand 171 states and 219 transitions. Second operand has 12 states, 9 states have (on average 6.888888888888889) internal successors, (62), 10 states have internal predecessors, (62), 5 states have call successors, (37), 3 states have call predecessors, (37), 5 states have return successors, (34), 5 states have call predecessors, (34), 5 states have call successors, (34) [2023-11-25 00:07:27,003 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] [2023-11-25 00:07:29,118 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-25 00:07:31,166 WARN L539 Checker$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] [2023-11-25 00:07:33,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-25 00:07:35,329 WARN L539 Checker$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] [2023-11-25 00:07:37,519 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-25 00:07:40,302 WARN L539 Checker$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] [2023-11-25 00:07:42,332 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-25 00:07:44,593 WARN L539 Checker$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] [2023-11-25 00:07:46,727 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-25 00:07:48,753 WARN L539 Checker$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] [2023-11-25 00:07:50,910 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] [2023-11-25 00:07:50,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:07:50,942 INFO L93 Difference]: Finished difference Result 339 states and 427 transitions. [2023-11-25 00:07:50,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-25 00:07:50,943 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 6.888888888888889) internal successors, (62), 10 states have internal predecessors, (62), 5 states have call successors, (37), 3 states have call predecessors, (37), 5 states have return successors, (34), 5 states have call predecessors, (34), 5 states have call successors, (34) Word has length 156 [2023-11-25 00:07:50,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:07:50,946 INFO L225 Difference]: With dead ends: 339 [2023-11-25 00:07:50,947 INFO L226 Difference]: Without dead ends: 211 [2023-11-25 00:07:50,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2023-11-25 00:07:50,950 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 63 mSDsluCounter, 1388 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 20 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 1573 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.8s IncrementalHoareTripleChecker+Time [2023-11-25 00:07:50,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 1573 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 821 Invalid, 12 Unknown, 0 Unchecked, 27.8s Time] [2023-11-25 00:07:50,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2023-11-25 00:07:50,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 208. [2023-11-25 00:07:50,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 116 states have (on average 1.1379310344827587) internal successors, (132), 118 states have internal predecessors, (132), 62 states have call successors, (62), 27 states have call predecessors, (62), 29 states have return successors, (64), 62 states have call predecessors, (64), 61 states have call successors, (64) [2023-11-25 00:07:50,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 258 transitions. [2023-11-25 00:07:50,988 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 258 transitions. Word has length 156 [2023-11-25 00:07:50,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:07:50,989 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 258 transitions. [2023-11-25 00:07:50,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 6.888888888888889) internal successors, (62), 10 states have internal predecessors, (62), 5 states have call successors, (37), 3 states have call predecessors, (37), 5 states have return successors, (34), 5 states have call predecessors, (34), 5 states have call successors, (34) [2023-11-25 00:07:50,989 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 258 transitions. [2023-11-25 00:07:50,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-11-25 00:07:50,993 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:07:50,993 INFO L195 NwaCegarLoop]: trace histogram [19, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:07:51,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b1f3bc8-883c-4220-b4f2-c5d643c576b5/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-25 00:07:51,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b1f3bc8-883c-4220-b4f2-c5d643c576b5/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:07:51,205 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:07:51,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:07:51,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1219957887, now seen corresponding path program 1 times [2023-11-25 00:07:51,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:07:51,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291550375] [2023-11-25 00:07:51,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:07:51,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:07:51,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:07:52,254 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2023-11-25 00:07:52,254 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:07:52,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291550375] [2023-11-25 00:07:52,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291550375] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:07:52,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464083941] [2023-11-25 00:07:52,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:07:52,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:07:52,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b1f3bc8-883c-4220-b4f2-c5d643c576b5/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:07:52,257 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b1f3bc8-883c-4220-b4f2-c5d643c576b5/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:07:52,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b1f3bc8-883c-4220-b4f2-c5d643c576b5/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-25 00:07:52,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:07:52,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 2543 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-25 00:07:52,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:07:52,954 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 191 proven. 0 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2023-11-25 00:07:52,958 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:07:52,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464083941] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:07:52,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:07:52,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-11-25 00:07:52,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661620480] [2023-11-25 00:07:52,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:07:52,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-25 00:07:52,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:07:52,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-25 00:07:52,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:07:52,961 INFO L87 Difference]: Start difference. First operand 208 states and 258 transitions. Second operand has 5 states, 3 states have (on average 22.0) internal successors, (66), 4 states have internal predecessors, (66), 3 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) [2023-11-25 00:07:53,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:07:53,532 INFO L93 Difference]: Finished difference Result 310 states and 392 transitions. [2023-11-25 00:07:53,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-25 00:07:53,533 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 22.0) internal successors, (66), 4 states have internal predecessors, (66), 3 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) Word has length 160 [2023-11-25 00:07:53,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:07:53,536 INFO L225 Difference]: With dead ends: 310 [2023-11-25 00:07:53,536 INFO L226 Difference]: Without dead ends: 210 [2023-11-25 00:07:53,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:07:53,538 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 0 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-25 00:07:53,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 646 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-25 00:07:53,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2023-11-25 00:07:53,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2023-11-25 00:07:53,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 117 states have (on average 1.1367521367521367) internal successors, (133), 120 states have internal predecessors, (133), 62 states have call successors, (62), 27 states have call predecessors, (62), 30 states have return successors, (67), 62 states have call predecessors, (67), 61 states have call successors, (67) [2023-11-25 00:07:53,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 262 transitions. [2023-11-25 00:07:53,564 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 262 transitions. Word has length 160 [2023-11-25 00:07:53,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:07:53,565 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 262 transitions. [2023-11-25 00:07:53,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 22.0) internal successors, (66), 4 states have internal predecessors, (66), 3 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) [2023-11-25 00:07:53,566 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 262 transitions. [2023-11-25 00:07:53,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-11-25 00:07:53,569 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:07:53,569 INFO L195 NwaCegarLoop]: trace histogram [19, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:07:53,584 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b1f3bc8-883c-4220-b4f2-c5d643c576b5/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-25 00:07:53,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b1f3bc8-883c-4220-b4f2-c5d643c576b5/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:07:53,780 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:07:53,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:07:53,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1801089832, now seen corresponding path program 1 times [2023-11-25 00:07:53,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:07:53,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174179152] [2023-11-25 00:07:53,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:07:53,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:07:53,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:07:54,390 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2023-11-25 00:07:54,390 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:07:54,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174179152] [2023-11-25 00:07:54,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174179152] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:07:54,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214146806] [2023-11-25 00:07:54,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:07:54,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:07:54,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b1f3bc8-883c-4220-b4f2-c5d643c576b5/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:07:54,393 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b1f3bc8-883c-4220-b4f2-c5d643c576b5/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:07:54,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b1f3bc8-883c-4220-b4f2-c5d643c576b5/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-25 00:07:55,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:07:55,086 INFO L262 TraceCheckSpWp]: Trace formula consists of 2575 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-25 00:07:55,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:07:55,323 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 188 proven. 24 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2023-11-25 00:07:55,323 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:07:55,622 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2023-11-25 00:07:55,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214146806] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:07:55,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [220038253] [2023-11-25 00:07:55,648 INFO L159 IcfgInterpreter]: Started Sifa with 112 locations of interest [2023-11-25 00:07:55,648 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:07:55,653 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:07:55,659 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:07:55,659 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs