./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_priority_queue_push_ref_harness_negated.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_0c4a6bd4-c013-481b-a16b-6e2ffc101962/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4a6bd4-c013-481b-a16b-6e2ffc101962/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_0c4a6bd4-c013-481b-a16b-6e2ffc101962/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4a6bd4-c013-481b-a16b-6e2ffc101962/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_priority_queue_push_ref_harness_negated.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4a6bd4-c013-481b-a16b-6e2ffc101962/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_0c4a6bd4-c013-481b-a16b-6e2ffc101962/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 8a38a43769c42d8669572ba16bfe2bf0ba7986e6a4cc5f2e35ff1bb4fb35c723 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-25 00:03:56,475 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-25 00:03:56,607 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4a6bd4-c013-481b-a16b-6e2ffc101962/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-25 00:03:56,620 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-25 00:03:56,621 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-25 00:03:56,676 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-25 00:03:56,677 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-25 00:03:56,678 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-25 00:03:56,679 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-25 00:03:56,685 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-25 00:03:56,686 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-25 00:03:56,688 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-25 00:03:56,688 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-25 00:03:56,690 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-25 00:03:56,691 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-25 00:03:56,691 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-25 00:03:56,692 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-25 00:03:56,692 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-25 00:03:56,693 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-25 00:03:56,694 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-25 00:03:56,694 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-25 00:03:56,695 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-25 00:03:56,698 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-25 00:03:56,699 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-25 00:03:56,699 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-25 00:03:56,700 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-25 00:03:56,700 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-25 00:03:56,701 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-25 00:03:56,701 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-25 00:03:56,702 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-25 00:03:56,703 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-25 00:03:56,703 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-25 00:03:56,704 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-25 00:03:56,704 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-25 00:03:56,704 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:03:56,704 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-25 00:03:56,705 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-25 00:03:56,705 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-25 00:03:56,705 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-25 00:03:56,705 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-25 00:03:56,706 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-25 00:03:56,706 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-25 00:03:56,706 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-25 00:03:56,707 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-25 00:03:56,707 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_0c4a6bd4-c013-481b-a16b-6e2ffc101962/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4a6bd4-c013-481b-a16b-6e2ffc101962/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8a38a43769c42d8669572ba16bfe2bf0ba7986e6a4cc5f2e35ff1bb4fb35c723 [2023-11-25 00:03:57,029 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-25 00:03:57,054 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-25 00:03:57,058 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-25 00:03:57,059 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-25 00:03:57,060 INFO L274 PluginConnector]: CDTParser initialized [2023-11-25 00:03:57,061 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4a6bd4-c013-481b-a16b-6e2ffc101962/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/aws-c-common/aws_priority_queue_push_ref_harness_negated.i [2023-11-25 00:04:00,384 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-25 00:04:01,056 INFO L384 CDTParser]: Found 1 translation units. [2023-11-25 00:04:01,056 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4a6bd4-c013-481b-a16b-6e2ffc101962/sv-benchmarks/c/aws-c-common/aws_priority_queue_push_ref_harness_negated.i [2023-11-25 00:04:01,101 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4a6bd4-c013-481b-a16b-6e2ffc101962/bin/utaipan-verify-SwPr7d2a91/data/ba56ce8bf/d010d85744a34bc0a0e400f31461d891/FLAG1e52a5496 [2023-11-25 00:04:01,118 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4a6bd4-c013-481b-a16b-6e2ffc101962/bin/utaipan-verify-SwPr7d2a91/data/ba56ce8bf/d010d85744a34bc0a0e400f31461d891 [2023-11-25 00:04:01,126 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-25 00:04:01,129 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-25 00:04:01,133 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-25 00:04:01,134 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-25 00:04:01,140 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-25 00:04:01,141 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:04:01" (1/1) ... [2023-11-25 00:04:01,142 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b68fbd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:04:01, skipping insertion in model container [2023-11-25 00:04:01,143 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:04:01" (1/1) ... [2023-11-25 00:04:01,313 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-25 00:04:01,718 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_0c4a6bd4-c013-481b-a16b-6e2ffc101962/sv-benchmarks/c/aws-c-common/aws_priority_queue_push_ref_harness_negated.i[4501,4514] [2023-11-25 00:04:01,728 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_0c4a6bd4-c013-481b-a16b-6e2ffc101962/sv-benchmarks/c/aws-c-common/aws_priority_queue_push_ref_harness_negated.i[4561,4574] [2023-11-25 00:04:02,985 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:02,990 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:02,992 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:02,994 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:03,000 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:03,030 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:03,032 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:03,042 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:03,045 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:03,050 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:03,053 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:03,054 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:03,055 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:03,620 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-25 00:04:03,622 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-25 00:04:03,623 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-25 00:04:03,625 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-25 00:04:03,627 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-25 00:04:03,628 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-25 00:04:03,629 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-25 00:04:03,630 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-25 00:04:03,634 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-25 00:04:03,642 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-25 00:04:03,931 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:03,940 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,051 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,053 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,054 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,055 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,056 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,056 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,062 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,063 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,063 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,064 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,066 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,066 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,067 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,070 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,071 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,072 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,072 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,077 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,077 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,086 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,088 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,088 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,114 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:04:04,191 INFO L202 MainTranslator]: Completed pre-run [2023-11-25 00:04:04,218 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_0c4a6bd4-c013-481b-a16b-6e2ffc101962/sv-benchmarks/c/aws-c-common/aws_priority_queue_push_ref_harness_negated.i[4501,4514] [2023-11-25 00:04:04,219 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_0c4a6bd4-c013-481b-a16b-6e2ffc101962/sv-benchmarks/c/aws-c-common/aws_priority_queue_push_ref_harness_negated.i[4561,4574] [2023-11-25 00:04:04,296 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,297 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,297 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,298 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,299 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,306 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,307 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,312 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,312 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,314 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,315 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,319 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,320 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,387 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-25 00:04:04,388 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-25 00:04:04,389 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-25 00:04:04,390 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-25 00:04:04,391 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-25 00:04:04,392 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-25 00:04:04,393 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-25 00:04:04,394 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-25 00:04:04,394 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-25 00:04:04,395 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-25 00:04:04,454 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,459 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,466 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7739-7750] [2023-11-25 00:04:04,502 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,503 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,503 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,504 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,504 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,505 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,505 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,506 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,506 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,506 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,507 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,507 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,507 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,508 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,509 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,509 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,509 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,513 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,514 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,526 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,527 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,527 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:04:04,544 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:04:04,847 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:04:04,848 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:04:04,848 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:04:04,848 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:04:04,848 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:04:04,848 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:04:04,848 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:04:04,848 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:04:04,849 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:04:04,849 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:04:04,849 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:04:04,849 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:04:04,849 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:04:04,849 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:04:04,849 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:04:04,859 INFO L206 MainTranslator]: Completed translation [2023-11-25 00:04:04,860 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:04:04 WrapperNode [2023-11-25 00:04:04,860 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-25 00:04:04,861 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-25 00:04:04,861 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-25 00:04:04,861 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-25 00:04:04,871 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:04:04" (1/1) ... [2023-11-25 00:04:04,994 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:04:04" (1/1) ... [2023-11-25 00:04:05,093 INFO L138 Inliner]: procedures = 696, calls = 1898, calls flagged for inlining = 57, calls inlined = 17, statements flattened = 1170 [2023-11-25 00:04:05,094 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-25 00:04:05,095 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-25 00:04:05,095 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-25 00:04:05,095 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-25 00:04:05,107 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:04:04" (1/1) ... [2023-11-25 00:04:05,107 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:04:04" (1/1) ... [2023-11-25 00:04:05,123 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:04:04" (1/1) ... [2023-11-25 00:04:05,123 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:04:04" (1/1) ... [2023-11-25 00:04:05,190 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:04:04" (1/1) ... [2023-11-25 00:04:05,199 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:04:04" (1/1) ... [2023-11-25 00:04:05,213 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:04:04" (1/1) ... [2023-11-25 00:04:05,223 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:04:04" (1/1) ... [2023-11-25 00:04:05,245 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-25 00:04:05,247 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-25 00:04:05,247 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-25 00:04:05,247 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-25 00:04:05,248 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:04:04" (1/1) ... [2023-11-25 00:04:05,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:04:05,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4a6bd4-c013-481b-a16b-6e2ffc101962/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:04:05,291 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4a6bd4-c013-481b-a16b-6e2ffc101962/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-25 00:04:05,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4a6bd4-c013-481b-a16b-6e2ffc101962/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-25 00:04:05,339 INFO L130 BoogieDeclarations]: Found specification of procedure s_swap [2023-11-25 00:04:05,340 INFO L138 BoogieDeclarations]: Found implementation of procedure s_swap [2023-11-25 00:04:05,340 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_init_dynamic [2023-11-25 00:04:05,340 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_init_dynamic [2023-11-25 00:04:05,340 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2023-11-25 00:04:05,341 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2023-11-25 00:04:05,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-25 00:04:05,341 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_bounded [2023-11-25 00:04:05,341 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_bounded [2023-11-25 00:04:05,341 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2023-11-25 00:04:05,342 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2023-11-25 00:04:05,342 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-25 00:04:05,342 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-25 00:04:05,342 INFO L130 BoogieDeclarations]: Found specification of procedure aws_allocator_is_valid [2023-11-25 00:04:05,343 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_allocator_is_valid [2023-11-25 00:04:05,343 INFO L130 BoogieDeclarations]: Found specification of procedure s_sift_up [2023-11-25 00:04:05,343 INFO L138 BoogieDeclarations]: Found implementation of procedure s_sift_up [2023-11-25 00:04:05,343 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-25 00:04:05,344 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-25 00:04:05,344 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-25 00:04:05,344 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-25 00:04:05,344 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-25 00:04:05,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-25 00:04:05,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-25 00:04:05,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-25 00:04:05,345 INFO L130 BoogieDeclarations]: Found specification of procedure my_abort [2023-11-25 00:04:05,346 INFO L138 BoogieDeclarations]: Found implementation of procedure my_abort [2023-11-25 00:04:05,346 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_impl [2023-11-25 00:04:05,346 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_impl [2023-11-25 00:04:05,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-25 00:04:05,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-25 00:04:05,347 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-25 00:04:05,347 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-25 00:04:05,347 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_size_t [2023-11-25 00:04:05,348 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_size_t [2023-11-25 00:04:05,349 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-11-25 00:04:05,352 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-11-25 00:04:05,353 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2023-11-25 00:04:05,353 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2023-11-25 00:04:05,354 INFO L130 BoogieDeclarations]: Found specification of procedure aws_priority_queue_is_valid [2023-11-25 00:04:05,354 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_priority_queue_is_valid [2023-11-25 00:04:05,354 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2023-11-25 00:04:05,355 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2023-11-25 00:04:05,355 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_length [2023-11-25 00:04:05,356 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_length [2023-11-25 00:04:05,363 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-25 00:04:05,363 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-25 00:04:05,363 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-25 00:04:05,364 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-25 00:04:05,364 INFO L130 BoogieDeclarations]: Found specification of procedure my_memcpy [2023-11-25 00:04:05,365 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memcpy [2023-11-25 00:04:05,365 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_pop_back [2023-11-25 00:04:05,365 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_pop_back [2023-11-25 00:04:05,366 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_acquire [2023-11-25 00:04:05,366 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_acquire [2023-11-25 00:04:05,366 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-25 00:04:05,366 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2023-11-25 00:04:05,366 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2023-11-25 00:04:05,366 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-25 00:04:05,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-25 00:04:05,367 INFO L130 BoogieDeclarations]: Found specification of procedure aws_priority_queue_push_ref [2023-11-25 00:04:05,367 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_priority_queue_push_ref [2023-11-25 00:04:05,368 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_get_at_ptr [2023-11-25 00:04:05,368 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_get_at_ptr [2023-11-25 00:04:05,368 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-11-25 00:04:05,368 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-11-25 00:04:05,368 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-11-25 00:04:05,369 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-11-25 00:04:05,369 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2023-11-25 00:04:05,369 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2023-11-25 00:04:05,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-25 00:04:05,369 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_array_list_has_allocated_data_member [2023-11-25 00:04:05,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_array_list_has_allocated_data_member [2023-11-25 00:04:05,370 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_set_at [2023-11-25 00:04:05,370 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_set_at [2023-11-25 00:04:05,370 INFO L130 BoogieDeclarations]: Found specification of procedure aws_priority_queue_backpointer_index_valid [2023-11-25 00:04:05,370 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_priority_queue_backpointer_index_valid [2023-11-25 00:04:05,370 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-25 00:04:05,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-25 00:04:05,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-25 00:04:06,048 INFO L241 CfgBuilder]: Building ICFG [2023-11-25 00:04:06,054 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-25 00:04:07,643 INFO L282 CfgBuilder]: Performing block encoding [2023-11-25 00:04:08,087 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-25 00:04:08,087 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-25 00:04:08,104 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:04:08 BoogieIcfgContainer [2023-11-25 00:04:08,104 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-25 00:04:08,107 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-25 00:04:08,108 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-25 00:04:08,111 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-25 00:04:08,111 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 12:04:01" (1/3) ... [2023-11-25 00:04:08,112 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a0586c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:04:08, skipping insertion in model container [2023-11-25 00:04:08,112 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:04:04" (2/3) ... [2023-11-25 00:04:08,113 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a0586c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:04:08, skipping insertion in model container [2023-11-25 00:04:08,113 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:04:08" (3/3) ... [2023-11-25 00:04:08,114 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_priority_queue_push_ref_harness_negated.i [2023-11-25 00:04:08,149 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-25 00:04:08,149 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-25 00:04:08,300 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-25 00:04:08,313 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;@7cc5301d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-25 00:04:08,313 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-25 00:04:08,320 INFO L276 IsEmpty]: Start isEmpty. Operand has 475 states, 240 states have (on average 1.1958333333333333) internal successors, (287), 243 states have internal predecessors, (287), 199 states have call successors, (199), 34 states have call predecessors, (199), 34 states have return successors, (199), 199 states have call predecessors, (199), 199 states have call successors, (199) [2023-11-25 00:04:08,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-11-25 00:04:08,344 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:04:08,346 INFO L195 NwaCegarLoop]: trace histogram [11, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:04:08,347 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:04:08,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:04:08,355 INFO L85 PathProgramCache]: Analyzing trace with hash 925600181, now seen corresponding path program 1 times [2023-11-25 00:04:08,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:04:08,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772588973] [2023-11-25 00:04:08,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:04:08,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:04:08,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:04:09,877 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2023-11-25 00:04:09,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:04:09,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772588973] [2023-11-25 00:04:09,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772588973] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:04:09,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876295460] [2023-11-25 00:04:09,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:04:09,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:04:09,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4a6bd4-c013-481b-a16b-6e2ffc101962/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:04:09,885 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4a6bd4-c013-481b-a16b-6e2ffc101962/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:04:09,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4a6bd4-c013-481b-a16b-6e2ffc101962/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-25 00:04:10,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:04:10,749 INFO L262 TraceCheckSpWp]: Trace formula consists of 2436 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-25 00:04:10,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:04:10,952 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2023-11-25 00:04:10,952 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:04:10,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876295460] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:04:10,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:04:10,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-11-25 00:04:10,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007886585] [2023-11-25 00:04:10,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:04:10,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-25 00:04:10,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:04:11,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-25 00:04:11,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-25 00:04:11,007 INFO L87 Difference]: Start difference. First operand has 475 states, 240 states have (on average 1.1958333333333333) internal successors, (287), 243 states have internal predecessors, (287), 199 states have call successors, (199), 34 states have call predecessors, (199), 34 states have return successors, (199), 199 states have call predecessors, (199), 199 states have call successors, (199) Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2023-11-25 00:04:11,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:04:11,821 INFO L93 Difference]: Finished difference Result 909 states and 1377 transitions. [2023-11-25 00:04:11,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-25 00:04:11,825 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) Word has length 147 [2023-11-25 00:04:11,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:04:11,845 INFO L225 Difference]: With dead ends: 909 [2023-11-25 00:04:11,845 INFO L226 Difference]: Without dead ends: 474 [2023-11-25 00:04:11,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-25 00:04:11,863 INFO L413 NwaCegarLoop]: 612 mSDtfsCounter, 18 mSDsluCounter, 1779 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 2391 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-25 00:04:11,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 2391 Invalid, 278 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-25 00:04:11,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2023-11-25 00:04:11,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 474. [2023-11-25 00:04:11,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 239 states have (on average 1.1841004184100419) internal successors, (283), 242 states have internal predecessors, (283), 199 states have call successors, (199), 34 states have call predecessors, (199), 34 states have return successors, (205), 197 states have call predecessors, (205), 197 states have call successors, (205) [2023-11-25 00:04:11,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 687 transitions. [2023-11-25 00:04:11,995 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 687 transitions. Word has length 147 [2023-11-25 00:04:11,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:04:11,996 INFO L495 AbstractCegarLoop]: Abstraction has 474 states and 687 transitions. [2023-11-25 00:04:11,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2023-11-25 00:04:11,996 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 687 transitions. [2023-11-25 00:04:12,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-11-25 00:04:12,001 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:04:12,001 INFO L195 NwaCegarLoop]: trace histogram [11, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:04:12,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4a6bd4-c013-481b-a16b-6e2ffc101962/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-25 00:04:12,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4a6bd4-c013-481b-a16b-6e2ffc101962/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-25 00:04:12,213 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:04:12,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:04:12,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1452842146, now seen corresponding path program 1 times [2023-11-25 00:04:12,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:04:12,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552538630] [2023-11-25 00:04:12,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:04:12,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:04:12,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:04:13,025 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2023-11-25 00:04:13,026 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:04:13,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552538630] [2023-11-25 00:04:13,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552538630] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:04:13,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754373911] [2023-11-25 00:04:13,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:04:13,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:04:13,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4a6bd4-c013-481b-a16b-6e2ffc101962/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:04:13,033 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4a6bd4-c013-481b-a16b-6e2ffc101962/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:04:13,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4a6bd4-c013-481b-a16b-6e2ffc101962/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-25 00:04:13,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:04:13,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 2486 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-25 00:04:13,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:04:14,075 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2023-11-25 00:04:14,076 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:04:14,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754373911] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:04:14,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:04:14,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2023-11-25 00:04:14,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243906738] [2023-11-25 00:04:14,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:04:14,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-25 00:04:14,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:04:14,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-25 00:04:14,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-11-25 00:04:14,083 INFO L87 Difference]: Start difference. First operand 474 states and 687 transitions. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 4 states have call successors, (33), 2 states have call predecessors, (33), 4 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2023-11-25 00:04:15,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:04:15,454 INFO L93 Difference]: Finished difference Result 919 states and 1373 transitions. [2023-11-25 00:04:15,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-25 00:04:15,456 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 4 states have call successors, (33), 2 states have call predecessors, (33), 4 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) Word has length 155 [2023-11-25 00:04:15,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:04:15,466 INFO L225 Difference]: With dead ends: 919 [2023-11-25 00:04:15,467 INFO L226 Difference]: Without dead ends: 487 [2023-11-25 00:04:15,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-11-25 00:04:15,479 INFO L413 NwaCegarLoop]: 582 mSDtfsCounter, 33 mSDsluCounter, 2785 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 3367 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:04:15,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 3367 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-25 00:04:15,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2023-11-25 00:04:15,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 485. [2023-11-25 00:04:15,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 247 states have (on average 1.1862348178137652) internal successors, (293), 250 states have internal predecessors, (293), 201 states have call successors, (201), 34 states have call predecessors, (201), 35 states have return successors, (239), 200 states have call predecessors, (239), 199 states have call successors, (239) [2023-11-25 00:04:15,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 733 transitions. [2023-11-25 00:04:15,586 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 733 transitions. Word has length 155 [2023-11-25 00:04:15,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:04:15,588 INFO L495 AbstractCegarLoop]: Abstraction has 485 states and 733 transitions. [2023-11-25 00:04:15,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 4 states have call successors, (33), 2 states have call predecessors, (33), 4 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2023-11-25 00:04:15,589 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 733 transitions. [2023-11-25 00:04:15,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-11-25 00:04:15,598 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:04:15,598 INFO L195 NwaCegarLoop]: trace histogram [11, 6, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:04:15,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4a6bd4-c013-481b-a16b-6e2ffc101962/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-25 00:04:15,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4a6bd4-c013-481b-a16b-6e2ffc101962/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:04:15,813 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:04:15,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:04:15,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1556341493, now seen corresponding path program 1 times [2023-11-25 00:04:15,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:04:15,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496357488] [2023-11-25 00:04:15,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:04:15,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:04:15,994 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:04:15,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1241201541] [2023-11-25 00:04:15,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:04:15,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:04:15,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4a6bd4-c013-481b-a16b-6e2ffc101962/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:04:16,000 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4a6bd4-c013-481b-a16b-6e2ffc101962/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:04:16,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4a6bd4-c013-481b-a16b-6e2ffc101962/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-25 00:04:16,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:04:16,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 2618 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-25 00:04:16,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:04:16,917 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2023-11-25 00:04:16,918 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:04:16,918 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:04:16,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496357488] [2023-11-25 00:04:16,918 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:04:16,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241201541] [2023-11-25 00:04:16,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241201541] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:04:16,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:04:16,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-25 00:04:16,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206738994] [2023-11-25 00:04:16,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:04:16,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-25 00:04:16,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:04:16,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-25 00:04:16,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:04:16,923 INFO L87 Difference]: Start difference. First operand 485 states and 733 transitions. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 4 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (32), 4 states have call predecessors, (32), 4 states have call successors, (32) [2023-11-25 00:04:17,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:04:17,908 INFO L93 Difference]: Finished difference Result 934 states and 1430 transitions. [2023-11-25 00:04:17,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-25 00:04:17,909 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 4 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (32), 4 states have call predecessors, (32), 4 states have call successors, (32) Word has length 164 [2023-11-25 00:04:17,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:04:17,915 INFO L225 Difference]: With dead ends: 934 [2023-11-25 00:04:17,915 INFO L226 Difference]: Without dead ends: 491 [2023-11-25 00:04:17,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-25 00:04:17,920 INFO L413 NwaCegarLoop]: 609 mSDtfsCounter, 25 mSDsluCounter, 2363 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 2972 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-25 00:04:17,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 2972 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-25 00:04:17,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2023-11-25 00:04:17,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 485. [2023-11-25 00:04:17,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 247 states have (on average 1.1862348178137652) internal successors, (293), 250 states have internal predecessors, (293), 201 states have call successors, (201), 34 states have call predecessors, (201), 35 states have return successors, (239), 200 states have call predecessors, (239), 199 states have call successors, (239) [2023-11-25 00:04:17,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 733 transitions. [2023-11-25 00:04:17,974 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 733 transitions. Word has length 164 [2023-11-25 00:04:17,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:04:17,976 INFO L495 AbstractCegarLoop]: Abstraction has 485 states and 733 transitions. [2023-11-25 00:04:17,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 4 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (32), 4 states have call predecessors, (32), 4 states have call successors, (32) [2023-11-25 00:04:17,977 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 733 transitions. [2023-11-25 00:04:17,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-11-25 00:04:17,980 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:04:17,981 INFO L195 NwaCegarLoop]: trace histogram [11, 6, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:04:18,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4a6bd4-c013-481b-a16b-6e2ffc101962/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-25 00:04:18,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4a6bd4-c013-481b-a16b-6e2ffc101962/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:04:18,193 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:04:18,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:04:18,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1258100546, now seen corresponding path program 1 times [2023-11-25 00:04:18,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:04:18,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511724265] [2023-11-25 00:04:18,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:04:18,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:04:18,349 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:04:18,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [643895829] [2023-11-25 00:04:18,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:04:18,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:04:18,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4a6bd4-c013-481b-a16b-6e2ffc101962/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:04:18,352 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4a6bd4-c013-481b-a16b-6e2ffc101962/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:04:18,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4a6bd4-c013-481b-a16b-6e2ffc101962/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-25 00:04:19,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:04:19,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 2672 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-25 00:04:19,122 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:04:19,274 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-11-25 00:04:19,274 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:04:19,274 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:04:19,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511724265] [2023-11-25 00:04:19,275 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:04:19,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643895829] [2023-11-25 00:04:19,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643895829] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:04:19,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:04:19,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-25 00:04:19,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928813954] [2023-11-25 00:04:19,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:04:19,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-25 00:04:19,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:04:19,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-25 00:04:19,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-25 00:04:19,281 INFO L87 Difference]: Start difference. First operand 485 states and 733 transitions. Second operand has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 5 states have call successors, (36), 2 states have call predecessors, (36), 4 states have return successors, (33), 5 states have call predecessors, (33), 5 states have call successors, (33) [2023-11-25 00:04:20,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:04:20,910 INFO L93 Difference]: Finished difference Result 936 states and 1427 transitions. [2023-11-25 00:04:20,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-25 00:04:20,911 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 5 states have call successors, (36), 2 states have call predecessors, (36), 4 states have return successors, (33), 5 states have call predecessors, (33), 5 states have call successors, (33) Word has length 172 [2023-11-25 00:04:20,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:04:20,917 INFO L225 Difference]: With dead ends: 936 [2023-11-25 00:04:20,917 INFO L226 Difference]: Without dead ends: 493 [2023-11-25 00:04:20,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-25 00:04:20,931 INFO L413 NwaCegarLoop]: 576 mSDtfsCounter, 48 mSDsluCounter, 3322 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 3898 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-25 00:04:20,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 3898 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-25 00:04:20,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2023-11-25 00:04:20,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 485. [2023-11-25 00:04:20,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 247 states have (on average 1.1862348178137652) internal successors, (293), 250 states have internal predecessors, (293), 201 states have call successors, (201), 34 states have call predecessors, (201), 35 states have return successors, (239), 200 states have call predecessors, (239), 199 states have call successors, (239) [2023-11-25 00:04:20,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 733 transitions. [2023-11-25 00:04:20,986 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 733 transitions. Word has length 172 [2023-11-25 00:04:20,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:04:20,987 INFO L495 AbstractCegarLoop]: Abstraction has 485 states and 733 transitions. [2023-11-25 00:04:20,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 5 states have call successors, (36), 2 states have call predecessors, (36), 4 states have return successors, (33), 5 states have call predecessors, (33), 5 states have call successors, (33) [2023-11-25 00:04:20,988 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 733 transitions. [2023-11-25 00:04:20,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2023-11-25 00:04:20,991 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:04:20,992 INFO L195 NwaCegarLoop]: trace histogram [11, 6, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:04:21,005 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4a6bd4-c013-481b-a16b-6e2ffc101962/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-25 00:04:21,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4a6bd4-c013-481b-a16b-6e2ffc101962/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:04:21,204 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:04:21,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:04:21,205 INFO L85 PathProgramCache]: Analyzing trace with hash 859221415, now seen corresponding path program 2 times [2023-11-25 00:04:21,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:04:21,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583940331] [2023-11-25 00:04:21,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:04:21,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:04:21,362 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:04:21,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [51437336] [2023-11-25 00:04:21,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-25 00:04:21,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:04:21,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4a6bd4-c013-481b-a16b-6e2ffc101962/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:04:21,364 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4a6bd4-c013-481b-a16b-6e2ffc101962/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:04:21,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4a6bd4-c013-481b-a16b-6e2ffc101962/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-25 00:04:22,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-25 00:04:22,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-25 00:04:22,106 INFO L262 TraceCheckSpWp]: Trace formula consists of 1825 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-25 00:04:22,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:04:22,164 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2023-11-25 00:04:22,165 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:04:22,165 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:04:22,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583940331] [2023-11-25 00:04:22,165 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:04:22,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51437336] [2023-11-25 00:04:22,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51437336] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:04:22,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:04:22,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-25 00:04:22,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154748322] [2023-11-25 00:04:22,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:04:22,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-25 00:04:22,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:04:22,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-25 00:04:22,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:04:22,170 INFO L87 Difference]: Start difference. First operand 485 states and 733 transitions. Second operand has 6 states, 5 states have (on average 12.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (33), 2 states have call predecessors, (33), 1 states have call successors, (33) [2023-11-25 00:04:23,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:04:23,280 INFO L93 Difference]: Finished difference Result 493 states and 741 transitions. [2023-11-25 00:04:23,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-25 00:04:23,281 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (33), 2 states have call predecessors, (33), 1 states have call successors, (33) Word has length 181 [2023-11-25 00:04:23,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:04:23,287 INFO L225 Difference]: With dead ends: 493 [2023-11-25 00:04:23,287 INFO L226 Difference]: Without dead ends: 491 [2023-11-25 00:04:23,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:04:23,290 INFO L413 NwaCegarLoop]: 629 mSDtfsCounter, 5 mSDsluCounter, 2481 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 3110 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-25 00:04:23,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 3110 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-25 00:04:23,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2023-11-25 00:04:23,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 490. [2023-11-25 00:04:23,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 250 states have (on average 1.184) internal successors, (296), 253 states have internal predecessors, (296), 202 states have call successors, (202), 35 states have call predecessors, (202), 36 states have return successors, (240), 201 states have call predecessors, (240), 200 states have call successors, (240) [2023-11-25 00:04:23,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 738 transitions. [2023-11-25 00:04:23,383 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 738 transitions. Word has length 181 [2023-11-25 00:04:23,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:04:23,387 INFO L495 AbstractCegarLoop]: Abstraction has 490 states and 738 transitions. [2023-11-25 00:04:23,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (33), 2 states have call predecessors, (33), 1 states have call successors, (33) [2023-11-25 00:04:23,388 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 738 transitions. [2023-11-25 00:04:23,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2023-11-25 00:04:23,391 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:04:23,392 INFO L195 NwaCegarLoop]: trace histogram [11, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:04:23,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4a6bd4-c013-481b-a16b-6e2ffc101962/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-25 00:04:23,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4a6bd4-c013-481b-a16b-6e2ffc101962/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:04:23,603 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:04:23,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:04:23,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1896716562, now seen corresponding path program 3 times [2023-11-25 00:04:23,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:04:23,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570272094] [2023-11-25 00:04:23,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:04:23,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:04:23,746 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:04:23,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1844978891] [2023-11-25 00:04:23,747 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-25 00:04:23,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:04:23,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4a6bd4-c013-481b-a16b-6e2ffc101962/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:04:23,748 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4a6bd4-c013-481b-a16b-6e2ffc101962/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:04:23,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4a6bd4-c013-481b-a16b-6e2ffc101962/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-25 00:04:24,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-25 00:04:24,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-25 00:04:24,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 795 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-25 00:04:24,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:04:24,343 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2023-11-25 00:04:24,343 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:04:24,344 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:04:24,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570272094] [2023-11-25 00:04:24,344 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:04:24,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844978891] [2023-11-25 00:04:24,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844978891] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:04:24,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:04:24,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-25 00:04:24,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739995467] [2023-11-25 00:04:24,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:04:24,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-25 00:04:24,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:04:24,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-25 00:04:24,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-25 00:04:24,347 INFO L87 Difference]: Start difference. First operand 490 states and 738 transitions. Second operand has 8 states, 7 states have (on average 10.285714285714286) internal successors, (72), 8 states have internal predecessors, (72), 4 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (35), 3 states have call predecessors, (35), 4 states have call successors, (35) [2023-11-25 00:04:26,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:04:26,035 INFO L93 Difference]: Finished difference Result 1003 states and 1532 transitions. [2023-11-25 00:04:26,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-25 00:04:26,036 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.285714285714286) internal successors, (72), 8 states have internal predecessors, (72), 4 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (35), 3 states have call predecessors, (35), 4 states have call successors, (35) Word has length 190 [2023-11-25 00:04:26,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:04:26,044 INFO L225 Difference]: With dead ends: 1003 [2023-11-25 00:04:26,044 INFO L226 Difference]: Without dead ends: 571 [2023-11-25 00:04:26,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-11-25 00:04:26,049 INFO L413 NwaCegarLoop]: 636 mSDtfsCounter, 71 mSDsluCounter, 3656 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 4292 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-25 00:04:26,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 4292 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 823 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-25 00:04:26,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2023-11-25 00:04:26,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 563. [2023-11-25 00:04:26,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 292 states have (on average 1.1986301369863013) internal successors, (350), 297 states have internal predecessors, (350), 231 states have call successors, (231), 36 states have call predecessors, (231), 38 states have return successors, (283), 229 states have call predecessors, (283), 229 states have call successors, (283) [2023-11-25 00:04:26,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 864 transitions. [2023-11-25 00:04:26,108 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 864 transitions. Word has length 190 [2023-11-25 00:04:26,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:04:26,109 INFO L495 AbstractCegarLoop]: Abstraction has 563 states and 864 transitions. [2023-11-25 00:04:26,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.285714285714286) internal successors, (72), 8 states have internal predecessors, (72), 4 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (35), 3 states have call predecessors, (35), 4 states have call successors, (35) [2023-11-25 00:04:26,110 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 864 transitions. [2023-11-25 00:04:26,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2023-11-25 00:04:26,114 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:04:26,114 INFO L195 NwaCegarLoop]: trace histogram [11, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:04:26,129 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4a6bd4-c013-481b-a16b-6e2ffc101962/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-25 00:04:26,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4a6bd4-c013-481b-a16b-6e2ffc101962/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:04:26,324 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:04:26,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:04:26,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1031718097, now seen corresponding path program 4 times [2023-11-25 00:04:26,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:04:26,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838120927] [2023-11-25 00:04:26,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:04:26,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:04:26,516 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:04:26,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1780554880] [2023-11-25 00:04:26,517 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-25 00:04:26,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:04:26,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4a6bd4-c013-481b-a16b-6e2ffc101962/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:04:26,518 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4a6bd4-c013-481b-a16b-6e2ffc101962/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:04:26,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4a6bd4-c013-481b-a16b-6e2ffc101962/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-25 00:04:27,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:04:27,613 INFO L262 TraceCheckSpWp]: Trace formula consists of 3068 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-25 00:04:27,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:04:27,755 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2023-11-25 00:04:27,755 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:04:27,756 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:04:27,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838120927] [2023-11-25 00:04:27,756 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:04:27,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780554880] [2023-11-25 00:04:27,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780554880] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:04:27,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:04:27,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-25 00:04:27,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919941691] [2023-11-25 00:04:27,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:04:27,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-25 00:04:27,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:04:27,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-25 00:04:27,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:04:27,761 INFO L87 Difference]: Start difference. First operand 563 states and 864 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (38), 3 states have call predecessors, (38), 3 states have return successors, (35), 3 states have call predecessors, (35), 4 states have call successors, (35) [2023-11-25 00:04:29,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:04:29,005 INFO L93 Difference]: Finished difference Result 954 states and 1447 transitions. [2023-11-25 00:04:29,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-25 00:04:29,006 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (38), 3 states have call predecessors, (38), 3 states have return successors, (35), 3 states have call predecessors, (35), 4 states have call successors, (35) Word has length 199 [2023-11-25 00:04:29,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:04:29,012 INFO L225 Difference]: With dead ends: 954 [2023-11-25 00:04:29,012 INFO L226 Difference]: Without dead ends: 492 [2023-11-25 00:04:29,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-25 00:04:29,017 INFO L413 NwaCegarLoop]: 605 mSDtfsCounter, 85 mSDsluCounter, 2869 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 3474 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:04:29,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 3474 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-25 00:04:29,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2023-11-25 00:04:29,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 492. [2023-11-25 00:04:29,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 251 states have (on average 1.1832669322709164) internal successors, (297), 255 states have internal predecessors, (297), 202 states have call successors, (202), 35 states have call predecessors, (202), 37 states have return successors, (244), 201 states have call predecessors, (244), 200 states have call successors, (244) [2023-11-25 00:04:29,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 743 transitions. [2023-11-25 00:04:29,067 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 743 transitions. Word has length 199 [2023-11-25 00:04:29,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:04:29,068 INFO L495 AbstractCegarLoop]: Abstraction has 492 states and 743 transitions. [2023-11-25 00:04:29,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (38), 3 states have call predecessors, (38), 3 states have return successors, (35), 3 states have call predecessors, (35), 4 states have call successors, (35) [2023-11-25 00:04:29,069 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 743 transitions. [2023-11-25 00:04:29,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2023-11-25 00:04:29,072 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:04:29,073 INFO L195 NwaCegarLoop]: trace histogram [11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:04:29,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4a6bd4-c013-481b-a16b-6e2ffc101962/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-25 00:04:29,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4a6bd4-c013-481b-a16b-6e2ffc101962/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:04:29,289 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:04:29,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:04:29,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1335314395, now seen corresponding path program 1 times [2023-11-25 00:04:29,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:04:29,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7609257] [2023-11-25 00:04:29,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:04:29,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:04:29,421 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:04:29,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1624307684] [2023-11-25 00:04:29,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:04:29,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:04:29,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4a6bd4-c013-481b-a16b-6e2ffc101962/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:04:29,424 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4a6bd4-c013-481b-a16b-6e2ffc101962/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:04:29,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4a6bd4-c013-481b-a16b-6e2ffc101962/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-25 00:04:30,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:04:30,516 INFO L262 TraceCheckSpWp]: Trace formula consists of 2986 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-25 00:04:30,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:04:30,728 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2023-11-25 00:04:30,728 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:04:30,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:04:30,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7609257] [2023-11-25 00:04:30,729 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:04:30,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624307684] [2023-11-25 00:04:30,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624307684] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:04:30,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:04:30,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-25 00:04:30,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398074453] [2023-11-25 00:04:30,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:04:30,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-25 00:04:30,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:04:30,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-25 00:04:30,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-25 00:04:30,734 INFO L87 Difference]: Start difference. First operand 492 states and 743 transitions. Second operand has 9 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 5 states have call successors, (39), 3 states have call predecessors, (39), 4 states have return successors, (36), 4 states have call predecessors, (36), 5 states have call successors, (36) [2023-11-25 00:04:32,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:04:32,264 INFO L93 Difference]: Finished difference Result 939 states and 1428 transitions. [2023-11-25 00:04:32,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-25 00:04:32,265 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 5 states have call successors, (39), 3 states have call predecessors, (39), 4 states have return successors, (36), 4 states have call predecessors, (36), 5 states have call successors, (36) Word has length 198 [2023-11-25 00:04:32,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:04:32,270 INFO L225 Difference]: With dead ends: 939 [2023-11-25 00:04:32,271 INFO L226 Difference]: Without dead ends: 500 [2023-11-25 00:04:32,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-11-25 00:04:32,277 INFO L413 NwaCegarLoop]: 576 mSDtfsCounter, 100 mSDsluCounter, 3813 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 4389 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-25 00:04:32,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 4389 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 886 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-25 00:04:32,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2023-11-25 00:04:32,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 498. [2023-11-25 00:04:32,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 256 states have (on average 1.18359375) internal successors, (303), 259 states have internal predecessors, (303), 203 states have call successors, (203), 35 states have call predecessors, (203), 37 states have return successors, (245), 203 states have call predecessors, (245), 201 states have call successors, (245) [2023-11-25 00:04:32,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 751 transitions. [2023-11-25 00:04:32,316 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 751 transitions. Word has length 198 [2023-11-25 00:04:32,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:04:32,317 INFO L495 AbstractCegarLoop]: Abstraction has 498 states and 751 transitions. [2023-11-25 00:04:32,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 5 states have call successors, (39), 3 states have call predecessors, (39), 4 states have return successors, (36), 4 states have call predecessors, (36), 5 states have call successors, (36) [2023-11-25 00:04:32,317 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 751 transitions. [2023-11-25 00:04:32,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2023-11-25 00:04:32,320 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:04:32,320 INFO L195 NwaCegarLoop]: trace histogram [11, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:04:32,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4a6bd4-c013-481b-a16b-6e2ffc101962/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-25 00:04:32,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4a6bd4-c013-481b-a16b-6e2ffc101962/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:04:32,533 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:04:32,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:04:32,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1723796402, now seen corresponding path program 2 times [2023-11-25 00:04:32,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:04:32,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884555096] [2023-11-25 00:04:32,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:04:32,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:04:32,646 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:04:32,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [409271816] [2023-11-25 00:04:32,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-25 00:04:32,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:04:32,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4a6bd4-c013-481b-a16b-6e2ffc101962/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:04:32,649 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4a6bd4-c013-481b-a16b-6e2ffc101962/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:04:32,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4a6bd4-c013-481b-a16b-6e2ffc101962/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-25 00:04:33,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-25 00:04:33,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-25 00:04:33,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 2035 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-25 00:04:33,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:04:33,983 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2023-11-25 00:04:33,984 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:04:34,388 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 30 proven. 3 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2023-11-25 00:04:34,388 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:04:34,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884555096] [2023-11-25 00:04:34,389 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:04:34,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409271816] [2023-11-25 00:04:34,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409271816] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:04:34,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1662198491] [2023-11-25 00:04:34,422 INFO L159 IcfgInterpreter]: Started Sifa with 104 locations of interest [2023-11-25 00:04:34,422 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:04:34,429 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:04:34,435 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:04:34,436 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs