./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_hash_table_remove_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_c9585fc4-9b76-4762-a72d-e053b4589700/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9585fc4-9b76-4762-a72d-e053b4589700/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_c9585fc4-9b76-4762-a72d-e053b4589700/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9585fc4-9b76-4762-a72d-e053b4589700/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_hash_table_remove_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9585fc4-9b76-4762-a72d-e053b4589700/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_c9585fc4-9b76-4762-a72d-e053b4589700/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 97e90b5866c6e9df01c589395fdbbe46254bc553e4330f2a669b393b022bbd71 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:19:10,613 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:19:10,698 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9585fc4-9b76-4762-a72d-e053b4589700/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-24 23:19:10,704 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:19:10,705 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:19:10,732 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:19:10,733 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:19:10,734 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:19:10,735 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:19:10,736 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:19:10,736 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:19:10,737 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:19:10,738 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:19:10,738 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:19:10,739 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:19:10,740 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:19:10,740 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:19:10,741 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:19:10,742 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:19:10,742 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:19:10,743 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:19:10,744 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:19:10,745 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:19:10,746 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:19:10,746 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:19:10,747 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:19:10,747 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:19:10,748 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:19:10,749 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:19:10,749 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:19:10,750 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:19:10,750 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:19:10,751 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:19:10,751 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:19:10,752 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:19:10,752 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:19:10,753 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:19:10,753 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:19:10,754 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:19:10,754 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:19:10,754 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:19:10,755 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:19:10,755 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:19:10,755 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:19:10,755 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_c9585fc4-9b76-4762-a72d-e053b4589700/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9585fc4-9b76-4762-a72d-e053b4589700/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 97e90b5866c6e9df01c589395fdbbe46254bc553e4330f2a669b393b022bbd71 [2023-11-24 23:19:11,036 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:19:11,068 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:19:11,070 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:19:11,072 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:19:11,072 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:19:11,074 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9585fc4-9b76-4762-a72d-e053b4589700/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/aws-c-common/aws_hash_table_remove_harness.i [2023-11-24 23:19:14,176 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:19:14,826 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:19:14,826 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9585fc4-9b76-4762-a72d-e053b4589700/sv-benchmarks/c/aws-c-common/aws_hash_table_remove_harness.i [2023-11-24 23:19:14,869 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9585fc4-9b76-4762-a72d-e053b4589700/bin/utaipan-verify-SwPr7d2a91/data/ba68d4dba/59ab574aed2f46afa3b5e77ca8cd6db4/FLAGdbfa56f3f [2023-11-24 23:19:14,887 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9585fc4-9b76-4762-a72d-e053b4589700/bin/utaipan-verify-SwPr7d2a91/data/ba68d4dba/59ab574aed2f46afa3b5e77ca8cd6db4 [2023-11-24 23:19:14,892 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:19:14,894 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:19:14,895 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:19:14,895 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:19:14,900 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:19:14,901 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:19:14" (1/1) ... [2023-11-24 23:19:14,903 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2607550e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:14, skipping insertion in model container [2023-11-24 23:19:14,903 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:19:14" (1/1) ... [2023-11-24 23:19:15,065 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:19:15,414 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_c9585fc4-9b76-4762-a72d-e053b4589700/sv-benchmarks/c/aws-c-common/aws_hash_table_remove_harness.i[4495,4508] [2023-11-24 23:19:15,424 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_c9585fc4-9b76-4762-a72d-e053b4589700/sv-benchmarks/c/aws-c-common/aws_hash_table_remove_harness.i[4555,4568] [2023-11-24 23:19:16,713 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:19:16,716 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:19:16,718 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:19:16,719 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:19:16,722 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:19:16,752 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:19:16,753 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:19:16,770 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:19:16,771 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:19:16,776 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:19:16,778 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:19:16,779 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:19:16,779 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:19:17,338 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-24 23:19:17,355 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-24 23:19:17,357 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-24 23:19:17,358 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-24 23:19:17,360 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-24 23:19:17,361 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-24 23:19:17,362 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-24 23:19:17,363 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-24 23:19:17,364 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-24 23:19:17,365 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-24 23:19:18,079 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:19:18,080 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:19:18,116 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:19:18,130 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:19:18,137 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:19:18,140 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:19:18,180 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:19:18,191 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:19:18,192 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:19:18,192 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:19:18,193 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:19:18,193 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:19:18,194 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:19:18,236 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:19:18,271 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:19:18,286 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_c9585fc4-9b76-4762-a72d-e053b4589700/sv-benchmarks/c/aws-c-common/aws_hash_table_remove_harness.i[4495,4508] [2023-11-24 23:19:18,287 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_c9585fc4-9b76-4762-a72d-e053b4589700/sv-benchmarks/c/aws-c-common/aws_hash_table_remove_harness.i[4555,4568] [2023-11-24 23:19:18,327 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:19:18,328 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:19:18,328 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:19:18,329 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:19:18,330 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:19:18,337 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:19:18,338 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:19:18,340 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:19:18,340 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:19:18,342 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:19:18,343 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:19:18,343 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:19:18,344 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:19:18,384 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-24 23:19:18,385 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-24 23:19:18,386 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-24 23:19:18,387 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-24 23:19:18,388 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-24 23:19:18,389 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-24 23:19:18,390 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-24 23:19:18,391 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-24 23:19:18,392 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-24 23:19:18,393 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-24 23:19:18,440 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7576-7587] [2023-11-24 23:19:18,549 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:19:18,549 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:19:18,558 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:19:18,559 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:19:18,563 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:19:18,563 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:19:18,574 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:19:18,575 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:19:18,575 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:19:18,576 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:19:18,576 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:19:18,577 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:19:18,577 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:19:18,672 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:19:18,985 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:19:18,985 WARN L675 CHandler]: The function equals_fn is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:19:18,985 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:19:18,985 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:19:18,985 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:19:18,986 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:19:18,986 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:19:18,986 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:19:18,986 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:19:18,986 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:19:18,987 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:19:18,987 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:19:18,987 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:19:18,987 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:19:18,987 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:19:18,988 WARN L675 CHandler]: The function callback is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:19:18,988 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:19:18,988 WARN L675 CHandler]: The function aws_array_list_ensure_capacity is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:19:18,994 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:19:18,995 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:18 WrapperNode [2023-11-24 23:19:18,995 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:19:18,996 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:19:18,996 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:19:18,996 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:19:19,003 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:18" (1/1) ... [2023-11-24 23:19:19,140 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:18" (1/1) ... [2023-11-24 23:19:19,246 INFO L138 Inliner]: procedures = 773, calls = 2500, calls flagged for inlining = 69, calls inlined = 19, statements flattened = 1094 [2023-11-24 23:19:19,247 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:19:19,248 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:19:19,248 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:19:19,248 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:19:19,259 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:18" (1/1) ... [2023-11-24 23:19:19,259 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:18" (1/1) ... [2023-11-24 23:19:19,271 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:18" (1/1) ... [2023-11-24 23:19:19,271 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:18" (1/1) ... [2023-11-24 23:19:19,320 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:18" (1/1) ... [2023-11-24 23:19:19,360 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:18" (1/1) ... [2023-11-24 23:19:19,373 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:18" (1/1) ... [2023-11-24 23:19:19,381 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:18" (1/1) ... [2023-11-24 23:19:19,399 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:19:19,400 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:19:19,400 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:19:19,400 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:19:19,401 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:18" (1/1) ... [2023-11-24 23:19:19,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:19:19,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9585fc4-9b76-4762-a72d-e053b4589700/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:19:19,442 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9585fc4-9b76-4762-a72d-e053b4589700/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:19:19,495 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2023-11-24 23:19:19,496 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-24 23:19:19,497 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-24 23:19:19,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~real [2023-11-24 23:19:19,497 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-24 23:19:19,497 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-24 23:19:19,498 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-24 23:19:19,498 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-24 23:19:19,498 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-24 23:19:19,498 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_is_valid [2023-11-24 23:19:19,498 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_is_valid [2023-11-24 23:19:19,499 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 23:19:19,499 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:19:19,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-24 23:19:19,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:19:19,500 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:19:19,500 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-24 23:19:19,500 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-24 23:19:19,500 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-11-24 23:19:19,500 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-11-24 23:19:19,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-24 23:19:19,501 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 23:19:19,501 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2023-11-24 23:19:19,501 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2023-11-24 23:19:19,501 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-24 23:19:19,502 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-11-24 23:19:19,502 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-11-24 23:19:19,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-24 23:19:19,502 INFO L130 BoogieDeclarations]: Found specification of procedure s_hash_for [2023-11-24 23:19:19,502 INFO L138 BoogieDeclarations]: Found implementation of procedure s_hash_for [2023-11-24 23:19:19,503 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2023-11-24 23:19:19,503 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2023-11-24 23:19:19,503 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_power_of_two [2023-11-24 23:19:19,503 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_power_of_two [2023-11-24 23:19:19,504 INFO L130 BoogieDeclarations]: Found specification of procedure s_hash_keys_eq [2023-11-24 23:19:19,504 INFO L138 BoogieDeclarations]: Found implementation of procedure s_hash_keys_eq [2023-11-24 23:19:19,504 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_uninterpreted_equals [2023-11-24 23:19:19,504 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_uninterpreted_equals [2023-11-24 23:19:19,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 23:19:19,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-24 23:19:19,505 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_required_bytes [2023-11-24 23:19:19,505 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_required_bytes [2023-11-24 23:19:19,505 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2023-11-24 23:19:19,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2023-11-24 23:19:19,506 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_uninterpreted_hasher [2023-11-24 23:19:19,506 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_uninterpreted_hasher [2023-11-24 23:19:19,507 INFO L130 BoogieDeclarations]: Found specification of procedure s_safe_eq_check [2023-11-24 23:19:19,507 INFO L138 BoogieDeclarations]: Found implementation of procedure s_safe_eq_check [2023-11-24 23:19:19,508 INFO L130 BoogieDeclarations]: Found specification of procedure s_find_entry [2023-11-24 23:19:19,508 INFO L138 BoogieDeclarations]: Found implementation of procedure s_find_entry [2023-11-24 23:19:19,508 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-24 23:19:19,509 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-24 23:19:19,509 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_is_valid [2023-11-24 23:19:19,509 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_is_valid [2023-11-24 23:19:19,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9585fc4-9b76-4762-a72d-e053b4589700/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:19:19,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-24 23:19:19,511 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-11-24 23:19:19,512 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-11-24 23:19:19,512 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-11-24 23:19:19,512 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-11-24 23:19:19,512 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2023-11-24 23:19:19,512 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2023-11-24 23:19:19,512 INFO L130 BoogieDeclarations]: Found specification of procedure s_remove_entry [2023-11-24 23:19:19,512 INFO L138 BoogieDeclarations]: Found implementation of procedure s_remove_entry [2023-11-24 23:19:19,512 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2023-11-24 23:19:19,513 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2023-11-24 23:19:19,513 INFO L130 BoogieDeclarations]: Found specification of procedure uninterpreted_equals [2023-11-24 23:19:19,513 INFO L138 BoogieDeclarations]: Found implementation of procedure uninterpreted_equals [2023-11-24 23:19:19,513 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-24 23:19:19,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-24 23:19:19,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:19:19,993 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:19:19,996 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:19:20,273 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume !true; [2023-11-24 23:19:20,273 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##47: assume !true; [2023-11-24 23:19:20,306 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##5: assume !true; [2023-11-24 23:19:20,356 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !true; [2023-11-24 23:19:21,600 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##26: assume !true; [2023-11-24 23:19:21,600 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !true; [2023-11-24 23:19:21,671 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:19:21,953 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:19:21,953 INFO L309 CfgBuilder]: Removed 16 assume(true) statements. [2023-11-24 23:19:21,955 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:19:21 BoogieIcfgContainer [2023-11-24 23:19:21,955 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:19:21,957 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:19:21,958 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:19:21,961 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:19:21,961 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:19:14" (1/3) ... [2023-11-24 23:19:21,961 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f51a210 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:19:21, skipping insertion in model container [2023-11-24 23:19:21,962 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:18" (2/3) ... [2023-11-24 23:19:21,962 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f51a210 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:19:21, skipping insertion in model container [2023-11-24 23:19:21,962 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:19:21" (3/3) ... [2023-11-24 23:19:21,963 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_hash_table_remove_harness.i [2023-11-24 23:19:21,983 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:19:21,983 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 23:19:22,071 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:19:22,079 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;@71fab424, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:19:22,079 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 23:19:22,085 INFO L276 IsEmpty]: Start isEmpty. Operand has 259 states, 149 states have (on average 1.221476510067114) internal successors, (182), 144 states have internal predecessors, (182), 87 states have call successors, (87), 27 states have call predecessors, (87), 27 states have return successors, (87), 87 states have call predecessors, (87), 87 states have call successors, (87) [2023-11-24 23:19:22,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-11-24 23:19:22,103 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:19:22,104 INFO L195 NwaCegarLoop]: trace histogram [15, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:19:22,105 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:19:22,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:19:22,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1345022844, now seen corresponding path program 1 times [2023-11-24 23:19:22,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:19:22,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629767577] [2023-11-24 23:19:22,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:22,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:19:22,649 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:19:22,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1827240012] [2023-11-24 23:19:22,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:22,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:19:22,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9585fc4-9b76-4762-a72d-e053b4589700/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:19:22,654 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9585fc4-9b76-4762-a72d-e053b4589700/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:19:22,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9585fc4-9b76-4762-a72d-e053b4589700/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 23:19:23,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:23,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 2610 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 23:19:23,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:19:23,711 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2023-11-24 23:19:23,711 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:19:23,712 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:19:23,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629767577] [2023-11-24 23:19:23,712 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:19:23,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827240012] [2023-11-24 23:19:23,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827240012] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:19:23,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:19:23,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 23:19:23,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499458260] [2023-11-24 23:19:23,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:19:23,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:19:23,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:19:23,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:19:23,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:19:23,763 INFO L87 Difference]: Start difference. First operand has 259 states, 149 states have (on average 1.221476510067114) internal successors, (182), 144 states have internal predecessors, (182), 87 states have call successors, (87), 27 states have call predecessors, (87), 27 states have return successors, (87), 87 states have call predecessors, (87), 87 states have call successors, (87) Second operand has 5 states, 4 states have (on average 11.75) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) [2023-11-24 23:19:24,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:19:24,425 INFO L93 Difference]: Finished difference Result 488 states and 698 transitions. [2023-11-24 23:19:24,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:19:24,428 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 11.75) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) Word has length 127 [2023-11-24 23:19:24,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:19:24,448 INFO L225 Difference]: With dead ends: 488 [2023-11-24 23:19:24,449 INFO L226 Difference]: Without dead ends: 259 [2023-11-24 23:19:24,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:19:24,467 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 1 mSDsluCounter, 899 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1200 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:19:24,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 1200 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 23:19:24,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2023-11-24 23:19:24,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2023-11-24 23:19:24,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 143 states have (on average 1.1888111888111887) internal successors, (170), 145 states have internal predecessors, (170), 87 states have call successors, (87), 27 states have call predecessors, (87), 28 states have return successors, (86), 86 states have call predecessors, (86), 85 states have call successors, (86) [2023-11-24 23:19:24,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 343 transitions. [2023-11-24 23:19:24,578 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 343 transitions. Word has length 127 [2023-11-24 23:19:24,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:19:24,579 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 343 transitions. [2023-11-24 23:19:24,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 11.75) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) [2023-11-24 23:19:24,580 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 343 transitions. [2023-11-24 23:19:24,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-11-24 23:19:24,589 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:19:24,590 INFO L195 NwaCegarLoop]: trace histogram [15, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:19:24,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9585fc4-9b76-4762-a72d-e053b4589700/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 23:19:24,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9585fc4-9b76-4762-a72d-e053b4589700/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:19:24,799 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:19:24,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:19:24,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1829357046, now seen corresponding path program 1 times [2023-11-24 23:19:24,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:19:24,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893077780] [2023-11-24 23:19:24,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:24,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:19:25,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:28,262 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-11-24 23:19:28,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:19:28,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893077780] [2023-11-24 23:19:28,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893077780] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:19:28,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103110271] [2023-11-24 23:19:28,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:28,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:19:28,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9585fc4-9b76-4762-a72d-e053b4589700/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:19:28,267 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9585fc4-9b76-4762-a72d-e053b4589700/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:19:28,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9585fc4-9b76-4762-a72d-e053b4589700/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 23:19:29,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:29,151 INFO L262 TraceCheckSpWp]: Trace formula consists of 2609 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-24 23:19:29,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:19:29,347 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2023-11-24 23:19:29,348 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:19:29,579 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2023-11-24 23:19:29,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103110271] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-24 23:19:29,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-24 23:19:29,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 7] total 15 [2023-11-24 23:19:29,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373584075] [2023-11-24 23:19:29,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:19:29,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:19:29,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:19:29,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:19:29,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2023-11-24 23:19:29,584 INFO L87 Difference]: Start difference. First operand 259 states and 343 transitions. Second operand has 5 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 1 states have call predecessors, (30), 1 states have call successors, (30) [2023-11-24 23:19:30,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:19:30,504 INFO L93 Difference]: Finished difference Result 265 states and 348 transitions. [2023-11-24 23:19:30,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 23:19:30,505 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 1 states have call predecessors, (30), 1 states have call successors, (30) Word has length 131 [2023-11-24 23:19:30,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:19:30,510 INFO L225 Difference]: With dead ends: 265 [2023-11-24 23:19:30,510 INFO L226 Difference]: Without dead ends: 263 [2023-11-24 23:19:30,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2023-11-24 23:19:30,512 INFO L413 NwaCegarLoop]: 295 mSDtfsCounter, 6 mSDsluCounter, 866 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1161 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-24 23:19:30,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 1161 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-24 23:19:30,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2023-11-24 23:19:30,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2023-11-24 23:19:30,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 146 states have (on average 1.1849315068493151) internal successors, (173), 148 states have internal predecessors, (173), 87 states have call successors, (87), 28 states have call predecessors, (87), 29 states have return successors, (86), 86 states have call predecessors, (86), 85 states have call successors, (86) [2023-11-24 23:19:30,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 346 transitions. [2023-11-24 23:19:30,536 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 346 transitions. Word has length 131 [2023-11-24 23:19:30,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:19:30,538 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 346 transitions. [2023-11-24 23:19:30,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 1 states have call predecessors, (30), 1 states have call successors, (30) [2023-11-24 23:19:30,538 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 346 transitions. [2023-11-24 23:19:30,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-11-24 23:19:30,541 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:19:30,542 INFO L195 NwaCegarLoop]: trace histogram [15, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:19:30,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9585fc4-9b76-4762-a72d-e053b4589700/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 23:19:30,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9585fc4-9b76-4762-a72d-e053b4589700/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:19:30,754 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:19:30,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:19:30,755 INFO L85 PathProgramCache]: Analyzing trace with hash 334304670, now seen corresponding path program 1 times [2023-11-24 23:19:30,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:19:30,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842916878] [2023-11-24 23:19:30,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:30,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:19:30,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:33,416 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-11-24 23:19:33,416 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:19:33,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842916878] [2023-11-24 23:19:33,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842916878] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:19:33,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467656175] [2023-11-24 23:19:33,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:33,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:19:33,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9585fc4-9b76-4762-a72d-e053b4589700/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:19:33,419 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9585fc4-9b76-4762-a72d-e053b4589700/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:19:33,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9585fc4-9b76-4762-a72d-e053b4589700/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 23:19:34,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:34,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 2637 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-24 23:19:34,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:19:34,603 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 [2023-11-24 23:19:35,142 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2023-11-24 23:19:35,142 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:19:35,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467656175] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:19:35,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:19:35,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 14 [2023-11-24 23:19:35,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151550868] [2023-11-24 23:19:35,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:19:35,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 23:19:35,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:19:35,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 23:19:35,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-11-24 23:19:35,146 INFO L87 Difference]: Start difference. First operand 263 states and 346 transitions. Second operand has 9 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (34), 3 states have call predecessors, (34), 4 states have return successors, (32), 4 states have call predecessors, (32), 4 states have call successors, (32) [2023-11-24 23:19:38,941 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] [2023-11-24 23:19:41,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-24 23:19:43,083 WARN L539 Checker$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] [2023-11-24 23:19:45,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-24 23:19:47,255 WARN L539 Checker$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] [2023-11-24 23:19:49,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-24 23:19:51,773 WARN L539 Checker$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] [2023-11-24 23:19:53,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-24 23:19:55,918 WARN L539 Checker$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] [2023-11-24 23:19:58,007 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-24 23:20:00,725 WARN L539 Checker$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] [2023-11-24 23:20:03,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-24 23:20:05,207 WARN L539 Checker$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] [2023-11-24 23:20:07,300 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]