./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_hash_table_init_unbounded_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d798d11-829b-41e1-a108-5a2945af9616/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d798d11-829b-41e1-a108-5a2945af9616/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_8d798d11-829b-41e1-a108-5a2945af9616/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d798d11-829b-41e1-a108-5a2945af9616/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_hash_table_init_unbounded_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d798d11-829b-41e1-a108-5a2945af9616/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_8d798d11-829b-41e1-a108-5a2945af9616/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 edc61b8c285d87a6706f10a0369a5dd380942e398b4b2231a7f494f856622f23 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-25 00:08:40,247 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-25 00:08:40,332 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d798d11-829b-41e1-a108-5a2945af9616/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-25 00:08:40,337 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-25 00:08:40,338 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-25 00:08:40,370 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-25 00:08:40,371 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-25 00:08:40,372 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-25 00:08:40,373 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-25 00:08:40,373 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-25 00:08:40,374 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-25 00:08:40,375 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-25 00:08:40,375 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-25 00:08:40,376 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-25 00:08:40,377 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-25 00:08:40,377 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-25 00:08:40,378 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-25 00:08:40,379 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-25 00:08:40,379 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-25 00:08:40,380 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-25 00:08:40,381 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-25 00:08:40,382 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-25 00:08:40,383 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-25 00:08:40,384 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-25 00:08:40,384 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-25 00:08:40,385 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-25 00:08:40,386 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-25 00:08:40,386 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-25 00:08:40,387 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-25 00:08:40,387 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-25 00:08:40,388 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-25 00:08:40,389 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-25 00:08:40,389 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-25 00:08:40,390 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-25 00:08:40,390 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:08:40,391 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-25 00:08:40,391 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-25 00:08:40,392 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-25 00:08:40,392 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-25 00:08:40,393 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-25 00:08:40,393 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-25 00:08:40,393 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-25 00:08:40,394 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-25 00:08:40,394 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-25 00:08:40,394 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_8d798d11-829b-41e1-a108-5a2945af9616/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d798d11-829b-41e1-a108-5a2945af9616/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> edc61b8c285d87a6706f10a0369a5dd380942e398b4b2231a7f494f856622f23 [2023-11-25 00:08:40,746 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-25 00:08:40,772 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-25 00:08:40,775 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-25 00:08:40,777 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-25 00:08:40,777 INFO L274 PluginConnector]: CDTParser initialized [2023-11-25 00:08:40,779 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d798d11-829b-41e1-a108-5a2945af9616/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/aws-c-common/aws_hash_table_init_unbounded_harness.i [2023-11-25 00:08:44,129 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-25 00:08:44,847 INFO L384 CDTParser]: Found 1 translation units. [2023-11-25 00:08:44,848 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d798d11-829b-41e1-a108-5a2945af9616/sv-benchmarks/c/aws-c-common/aws_hash_table_init_unbounded_harness.i [2023-11-25 00:08:44,915 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d798d11-829b-41e1-a108-5a2945af9616/bin/utaipan-verify-SwPr7d2a91/data/c514ccdd3/8e5827477c4a40de95098bea408cacf2/FLAG511b628d5 [2023-11-25 00:08:44,934 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d798d11-829b-41e1-a108-5a2945af9616/bin/utaipan-verify-SwPr7d2a91/data/c514ccdd3/8e5827477c4a40de95098bea408cacf2 [2023-11-25 00:08:44,937 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-25 00:08:44,939 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-25 00:08:44,941 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-25 00:08:44,941 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-25 00:08:44,948 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-25 00:08:44,949 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:08:44" (1/1) ... [2023-11-25 00:08:44,951 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53e51f0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:44, skipping insertion in model container [2023-11-25 00:08:44,951 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:08:44" (1/1) ... [2023-11-25 00:08:45,170 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-25 00:08:45,643 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_8d798d11-829b-41e1-a108-5a2945af9616/sv-benchmarks/c/aws-c-common/aws_hash_table_init_unbounded_harness.i[4503,4516] [2023-11-25 00:08:45,656 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_8d798d11-829b-41e1-a108-5a2945af9616/sv-benchmarks/c/aws-c-common/aws_hash_table_init_unbounded_harness.i[4563,4576] [2023-11-25 00:08:47,024 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:47,025 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:47,026 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:47,027 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:47,028 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:47,045 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:47,046 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:47,048 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:47,049 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:47,051 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:47,052 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:47,053 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:47,054 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:47,597 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-25 00:08:47,598 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-25 00:08:47,600 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-25 00:08:47,601 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-25 00:08:47,603 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-25 00:08:47,604 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-25 00:08:47,605 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-25 00:08:47,606 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-25 00:08:47,607 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-25 00:08:47,608 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-25 00:08:48,256 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:48,257 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:48,286 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:48,288 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:48,296 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:48,297 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:48,359 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:48,361 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:48,362 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:48,363 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:48,364 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:48,365 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:48,365 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:48,410 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:08:48,472 INFO L202 MainTranslator]: Completed pre-run [2023-11-25 00:08:48,500 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_8d798d11-829b-41e1-a108-5a2945af9616/sv-benchmarks/c/aws-c-common/aws_hash_table_init_unbounded_harness.i[4503,4516] [2023-11-25 00:08:48,502 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_8d798d11-829b-41e1-a108-5a2945af9616/sv-benchmarks/c/aws-c-common/aws_hash_table_init_unbounded_harness.i[4563,4576] [2023-11-25 00:08:48,583 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:48,584 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:48,584 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:48,587 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:48,588 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:48,604 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:48,605 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:48,606 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:48,607 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:48,609 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:48,610 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:48,611 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:48,612 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:48,674 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-25 00:08:48,679 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-25 00:08:48,681 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-25 00:08:48,682 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-25 00:08:48,684 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-25 00:08:48,686 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-25 00:08:48,687 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-25 00:08:48,688 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-25 00:08:48,689 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-25 00:08:48,690 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-25 00:08:48,758 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7576-7587] [2023-11-25 00:08:48,897 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:48,898 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:48,909 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:48,910 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:48,916 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:48,916 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:49,016 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:49,017 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:49,018 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:49,019 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:49,019 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:49,020 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:49,020 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:49,054 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:08:49,470 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:08:49,470 WARN L675 CHandler]: The function equals_fn is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:08:49,471 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:08:49,471 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:08:49,471 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:08:49,471 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:08:49,471 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:08:49,471 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:08:49,472 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:08:49,472 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:08:49,472 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:08:49,472 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:08:49,472 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:08:49,473 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:08:49,473 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:08:49,473 WARN L675 CHandler]: The function callback is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:08:49,473 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:08:49,473 WARN L675 CHandler]: The function aws_array_list_ensure_capacity is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:08:49,483 INFO L206 MainTranslator]: Completed translation [2023-11-25 00:08:49,483 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:49 WrapperNode [2023-11-25 00:08:49,484 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-25 00:08:49,485 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-25 00:08:49,485 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-25 00:08:49,485 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-25 00:08:49,494 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:49" (1/1) ... [2023-11-25 00:08:49,672 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:49" (1/1) ... [2023-11-25 00:08:49,772 INFO L138 Inliner]: procedures = 773, calls = 2430, calls flagged for inlining = 66, calls inlined = 11, statements flattened = 825 [2023-11-25 00:08:49,773 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-25 00:08:49,774 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-25 00:08:49,774 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-25 00:08:49,774 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-25 00:08:49,786 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:49" (1/1) ... [2023-11-25 00:08:49,787 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:49" (1/1) ... [2023-11-25 00:08:49,798 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:49" (1/1) ... [2023-11-25 00:08:49,798 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:49" (1/1) ... [2023-11-25 00:08:49,846 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:49" (1/1) ... [2023-11-25 00:08:49,853 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:49" (1/1) ... [2023-11-25 00:08:49,862 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:49" (1/1) ... [2023-11-25 00:08:49,870 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:49" (1/1) ... [2023-11-25 00:08:49,884 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-25 00:08:49,885 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-25 00:08:49,886 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-25 00:08:49,886 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-25 00:08:49,887 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:49" (1/1) ... [2023-11-25 00:08:49,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:08:49,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d798d11-829b-41e1-a108-5a2945af9616/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:08:49,962 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d798d11-829b-41e1-a108-5a2945af9616/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-25 00:08:49,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d798d11-829b-41e1-a108-5a2945af9616/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-25 00:08:50,014 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2023-11-25 00:08:50,014 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-25 00:08:50,014 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-25 00:08:50,015 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-25 00:08:50,015 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-25 00:08:50,015 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-25 00:08:50,016 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-25 00:08:50,016 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-25 00:08:50,016 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_is_valid [2023-11-25 00:08:50,016 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_is_valid [2023-11-25 00:08:50,017 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-25 00:08:50,017 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-25 00:08:50,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-25 00:08:50,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-25 00:08:50,017 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-25 00:08:50,019 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-11-25 00:08:50,020 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-11-25 00:08:50,020 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-25 00:08:50,020 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2023-11-25 00:08:50,020 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2023-11-25 00:08:50,020 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-25 00:08:50,021 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-25 00:08:50,021 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_power_of_two [2023-11-25 00:08:50,021 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_power_of_two [2023-11-25 00:08:50,021 INFO L130 BoogieDeclarations]: Found specification of procedure s_update_template_size [2023-11-25 00:08:50,021 INFO L138 BoogieDeclarations]: Found implementation of procedure s_update_template_size [2023-11-25 00:08:50,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-25 00:08:50,022 INFO L130 BoogieDeclarations]: Found specification of procedure aws_allocator_is_valid [2023-11-25 00:08:50,022 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_allocator_is_valid [2023-11-25 00:08:50,022 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_calloc [2023-11-25 00:08:50,022 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_calloc [2023-11-25 00:08:50,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2023-11-25 00:08:50,023 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_required_bytes [2023-11-25 00:08:50,023 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_required_bytes [2023-11-25 00:08:50,023 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-25 00:08:50,023 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-25 00:08:50,024 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_is_valid [2023-11-25 00:08:50,024 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_is_valid [2023-11-25 00:08:50,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-25 00:08:50,025 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-11-25 00:08:50,025 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-11-25 00:08:50,025 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-11-25 00:08:50,025 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-11-25 00:08:50,026 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2023-11-25 00:08:50,026 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2023-11-25 00:08:50,027 INFO L130 BoogieDeclarations]: Found specification of procedure s_alloc_state [2023-11-25 00:08:50,027 INFO L138 BoogieDeclarations]: Found implementation of procedure s_alloc_state [2023-11-25 00:08:50,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-25 00:08:50,544 INFO L241 CfgBuilder]: Building ICFG [2023-11-25 00:08:50,549 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-25 00:08:52,093 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##9: assume !true; [2023-11-25 00:08:52,111 INFO L282 CfgBuilder]: Performing block encoding [2023-11-25 00:08:52,506 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-25 00:08:52,506 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-25 00:08:52,508 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:08:52 BoogieIcfgContainer [2023-11-25 00:08:52,509 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-25 00:08:52,512 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-25 00:08:52,513 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-25 00:08:52,516 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-25 00:08:52,517 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 12:08:44" (1/3) ... [2023-11-25 00:08:52,518 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2591b955 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:08:52, skipping insertion in model container [2023-11-25 00:08:52,518 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:49" (2/3) ... [2023-11-25 00:08:52,519 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2591b955 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:08:52, skipping insertion in model container [2023-11-25 00:08:52,519 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:08:52" (3/3) ... [2023-11-25 00:08:52,521 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_hash_table_init_unbounded_harness.i [2023-11-25 00:08:52,545 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-25 00:08:52,545 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-25 00:08:52,610 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-25 00:08:52,619 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;@2fc3be2d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-25 00:08:52,619 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-25 00:08:52,626 INFO L276 IsEmpty]: Start isEmpty. Operand has 125 states, 73 states have (on average 1.2191780821917808) internal successors, (89), 73 states have internal predecessors, (89), 34 states have call successors, (34), 17 states have call predecessors, (34), 17 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-25 00:08:52,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-25 00:08:52,639 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:08:52,640 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:08:52,640 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:08:52,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:08:52,647 INFO L85 PathProgramCache]: Analyzing trace with hash 246312510, now seen corresponding path program 1 times [2023-11-25 00:08:52,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:08:52,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200799218] [2023-11-25 00:08:52,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:08:52,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:08:53,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:08:53,709 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-25 00:08:53,711 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:08:53,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200799218] [2023-11-25 00:08:53,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200799218] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:08:53,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:08:53,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-25 00:08:53,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72170271] [2023-11-25 00:08:53,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:08:53,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:08:53,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:08:53,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:08:53,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:08:53,798 INFO L87 Difference]: Start difference. First operand has 125 states, 73 states have (on average 1.2191780821917808) internal successors, (89), 73 states have internal predecessors, (89), 34 states have call successors, (34), 17 states have call predecessors, (34), 17 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-25 00:08:56,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-25 00:08:58,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-25 00:08:59,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:08:59,400 INFO L93 Difference]: Finished difference Result 157 states and 194 transitions. [2023-11-25 00:08:59,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-25 00:08:59,403 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 44 [2023-11-25 00:08:59,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:08:59,412 INFO L225 Difference]: With dead ends: 157 [2023-11-25 00:08:59,412 INFO L226 Difference]: Without dead ends: 122 [2023-11-25 00:08:59,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:08:59,419 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 4 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2023-11-25 00:08:59,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 392 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 2 Unknown, 0 Unchecked, 5.5s Time] [2023-11-25 00:08:59,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-11-25 00:08:59,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2023-11-25 00:08:59,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 70 states have (on average 1.1714285714285715) internal successors, (82), 71 states have internal predecessors, (82), 34 states have call successors, (34), 17 states have call predecessors, (34), 17 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-25 00:08:59,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 149 transitions. [2023-11-25 00:08:59,477 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 149 transitions. Word has length 44 [2023-11-25 00:08:59,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:08:59,479 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 149 transitions. [2023-11-25 00:08:59,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-25 00:08:59,480 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 149 transitions. [2023-11-25 00:08:59,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-25 00:08:59,483 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:08:59,484 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:08:59,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-25 00:08:59,484 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:08:59,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:08:59,485 INFO L85 PathProgramCache]: Analyzing trace with hash -400070122, now seen corresponding path program 1 times [2023-11-25 00:08:59,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:08:59,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614249519] [2023-11-25 00:08:59,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:08:59,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:08:59,629 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:08:59,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1912755523] [2023-11-25 00:08:59,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:08:59,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:08:59,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d798d11-829b-41e1-a108-5a2945af9616/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:08:59,636 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d798d11-829b-41e1-a108-5a2945af9616/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:08:59,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d798d11-829b-41e1-a108-5a2945af9616/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-25 00:09:00,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:09:00,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 2308 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-25 00:09:00,407 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:09:00,569 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-25 00:09:00,570 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:09:00,570 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:09:00,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614249519] [2023-11-25 00:09:00,570 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:09:00,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912755523] [2023-11-25 00:09:00,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912755523] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:09:00,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:09:00,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-25 00:09:00,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178773114] [2023-11-25 00:09:00,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:09:00,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-25 00:09:00,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:09:00,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-25 00:09:00,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:09:00,581 INFO L87 Difference]: Start difference. First operand 122 states and 149 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2023-11-25 00:09:02,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-25 00:09:04,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-25 00:09:06,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-25 00:09:08,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-25 00:09:09,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:09:09,797 INFO L93 Difference]: Finished difference Result 208 states and 251 transitions. [2023-11-25 00:09:09,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-25 00:09:09,798 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 64 [2023-11-25 00:09:09,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:09:09,802 INFO L225 Difference]: With dead ends: 208 [2023-11-25 00:09:09,803 INFO L226 Difference]: Without dead ends: 126 [2023-11-25 00:09:09,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:09:09,805 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 1 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:09:09,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 504 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 3 Unknown, 0 Unchecked, 9.2s Time] [2023-11-25 00:09:09,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-11-25 00:09:09,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2023-11-25 00:09:09,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 73 states have (on average 1.1643835616438356) internal successors, (85), 74 states have internal predecessors, (85), 34 states have call successors, (34), 17 states have call predecessors, (34), 18 states have return successors, (36), 34 states have call predecessors, (36), 33 states have call successors, (36) [2023-11-25 00:09:09,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 155 transitions. [2023-11-25 00:09:09,833 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 155 transitions. Word has length 64 [2023-11-25 00:09:09,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:09:09,834 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 155 transitions. [2023-11-25 00:09:09,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2023-11-25 00:09:09,835 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 155 transitions. [2023-11-25 00:09:09,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-25 00:09:09,842 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:09:09,843 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:09:09,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d798d11-829b-41e1-a108-5a2945af9616/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-25 00:09:10,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d798d11-829b-41e1-a108-5a2945af9616/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:09:10,055 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:09:10,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:09:10,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1912628480, now seen corresponding path program 1 times [2023-11-25 00:09:10,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:09:10,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858288137] [2023-11-25 00:09:10,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:09:10,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:09:10,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:09:11,557 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-25 00:09:11,558 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:09:11,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858288137] [2023-11-25 00:09:11,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858288137] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:09:11,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:09:11,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-25 00:09:11,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594409858] [2023-11-25 00:09:11,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:09:11,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-25 00:09:11,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:09:11,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-25 00:09:11,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:09:11,561 INFO L87 Difference]: Start difference. First operand 126 states and 155 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-25 00:09:13,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:09:13,247 INFO L93 Difference]: Finished difference Result 157 states and 189 transitions. [2023-11-25 00:09:13,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-25 00:09:13,248 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 68 [2023-11-25 00:09:13,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:09:13,250 INFO L225 Difference]: With dead ends: 157 [2023-11-25 00:09:13,250 INFO L226 Difference]: Without dead ends: 126 [2023-11-25 00:09:13,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:09:13,252 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 0 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-25 00:09:13,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 506 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-25 00:09:13,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-11-25 00:09:13,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2023-11-25 00:09:13,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 73 states have (on average 1.1506849315068493) internal successors, (84), 74 states have internal predecessors, (84), 34 states have call successors, (34), 17 states have call predecessors, (34), 18 states have return successors, (36), 34 states have call predecessors, (36), 33 states have call successors, (36) [2023-11-25 00:09:13,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 154 transitions. [2023-11-25 00:09:13,268 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 154 transitions. Word has length 68 [2023-11-25 00:09:13,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:09:13,269 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 154 transitions. [2023-11-25 00:09:13,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-25 00:09:13,269 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 154 transitions. [2023-11-25 00:09:13,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-25 00:09:13,272 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:09:13,273 INFO L195 NwaCegarLoop]: trace histogram [8, 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] [2023-11-25 00:09:13,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-25 00:09:13,273 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:09:13,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:09:13,274 INFO L85 PathProgramCache]: Analyzing trace with hash 439798049, now seen corresponding path program 1 times [2023-11-25 00:09:13,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:09:13,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79451241] [2023-11-25 00:09:13,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:09:13,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:09:13,426 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:09:13,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1341669053] [2023-11-25 00:09:13,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:09:13,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:09:13,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d798d11-829b-41e1-a108-5a2945af9616/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:09:13,428 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d798d11-829b-41e1-a108-5a2945af9616/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:09:13,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d798d11-829b-41e1-a108-5a2945af9616/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-25 00:09:14,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:09:14,206 INFO L262 TraceCheckSpWp]: Trace formula consists of 2600 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-25 00:09:14,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:09:14,247 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-25 00:09:14,247 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:09:14,247 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:09:14,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79451241] [2023-11-25 00:09:14,248 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:09:14,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341669053] [2023-11-25 00:09:14,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341669053] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:09:14,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:09:14,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-25 00:09:14,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024467104] [2023-11-25 00:09:14,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:09:14,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:09:14,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:09:14,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:09:14,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:09:14,250 INFO L87 Difference]: Start difference. First operand 126 states and 154 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-25 00:09:16,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-25 00:09:18,342 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-25 00:09:19,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:09:19,421 INFO L93 Difference]: Finished difference Result 210 states and 251 transitions. [2023-11-25 00:09:19,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-25 00:09:19,422 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) Word has length 94 [2023-11-25 00:09:19,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:09:19,424 INFO L225 Difference]: With dead ends: 210 [2023-11-25 00:09:19,424 INFO L226 Difference]: Without dead ends: 126 [2023-11-25 00:09:19,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:09:19,427 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 0 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:09:19,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 385 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 2 Unknown, 0 Unchecked, 5.2s Time] [2023-11-25 00:09:19,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-11-25 00:09:19,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 122. [2023-11-25 00:09:19,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 70 states have (on average 1.1428571428571428) internal successors, (80), 71 states have internal predecessors, (80), 34 states have call successors, (34), 17 states have call predecessors, (34), 17 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-25 00:09:19,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 147 transitions. [2023-11-25 00:09:19,441 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 147 transitions. Word has length 94 [2023-11-25 00:09:19,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:09:19,441 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 147 transitions. [2023-11-25 00:09:19,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-25 00:09:19,442 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 147 transitions. [2023-11-25 00:09:19,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-11-25 00:09:19,445 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:09:19,445 INFO L195 NwaCegarLoop]: trace histogram [8, 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] [2023-11-25 00:09:19,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d798d11-829b-41e1-a108-5a2945af9616/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-25 00:09:19,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d798d11-829b-41e1-a108-5a2945af9616/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:09:19,656 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:09:19,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:09:19,657 INFO L85 PathProgramCache]: Analyzing trace with hash 872847814, now seen corresponding path program 1 times [2023-11-25 00:09:19,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:09:19,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826724255] [2023-11-25 00:09:19,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:09:19,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:09:19,864 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:09:19,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [240022890] [2023-11-25 00:09:19,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:09:19,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:09:19,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d798d11-829b-41e1-a108-5a2945af9616/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:09:19,866 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d798d11-829b-41e1-a108-5a2945af9616/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:09:19,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d798d11-829b-41e1-a108-5a2945af9616/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-25 00:09:20,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:09:20,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 2704 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-25 00:09:20,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:09:20,757 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-11-25 00:09:20,757 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:09:20,757 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:09:20,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826724255] [2023-11-25 00:09:20,758 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:09:20,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240022890] [2023-11-25 00:09:20,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240022890] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:09:20,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:09:20,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-25 00:09:20,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791359991] [2023-11-25 00:09:20,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:09:20,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-25 00:09:20,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:09:20,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-25 00:09:20,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:09:20,761 INFO L87 Difference]: Start difference. First operand 122 states and 147 transitions. Second operand has 5 states, 4 states have (on average 11.5) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-25 00:09:22,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-25 00:09:24,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-25 00:09:26,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-25 00:09:28,883 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-25 00:09:30,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:09:30,360 INFO L93 Difference]: Finished difference Result 158 states and 189 transitions. [2023-11-25 00:09:30,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-25 00:09:30,361 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 11.5) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) Word has length 99 [2023-11-25 00:09:30,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:09:30,363 INFO L225 Difference]: With dead ends: 158 [2023-11-25 00:09:30,363 INFO L226 Difference]: Without dead ends: 126 [2023-11-25 00:09:30,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:09:30,365 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 1 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2023-11-25 00:09:30,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 495 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 4 Unknown, 0 Unchecked, 9.6s Time] [2023-11-25 00:09:30,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-11-25 00:09:30,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2023-11-25 00:09:30,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 73 states have (on average 1.1369863013698631) internal successors, (83), 74 states have internal predecessors, (83), 34 states have call successors, (34), 17 states have call predecessors, (34), 18 states have return successors, (36), 34 states have call predecessors, (36), 33 states have call successors, (36) [2023-11-25 00:09:30,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 153 transitions. [2023-11-25 00:09:30,381 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 153 transitions. Word has length 99 [2023-11-25 00:09:30,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:09:30,384 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 153 transitions. [2023-11-25 00:09:30,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 11.5) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-25 00:09:30,386 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 153 transitions. [2023-11-25 00:09:30,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-25 00:09:30,395 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:09:30,395 INFO L195 NwaCegarLoop]: trace histogram [8, 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] [2023-11-25 00:09:30,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d798d11-829b-41e1-a108-5a2945af9616/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-25 00:09:30,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d798d11-829b-41e1-a108-5a2945af9616/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:09:30,606 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:09:30,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:09:30,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1979639324, now seen corresponding path program 1 times [2023-11-25 00:09:30,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:09:30,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976145267] [2023-11-25 00:09:30,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:09:30,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:09:30,757 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:09:30,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1708729143] [2023-11-25 00:09:30,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:09:30,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:09:30,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d798d11-829b-41e1-a108-5a2945af9616/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:09:30,759 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d798d11-829b-41e1-a108-5a2945af9616/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:09:30,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d798d11-829b-41e1-a108-5a2945af9616/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-25 00:09:31,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:09:31,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 2703 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-25 00:09:31,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:09:31,710 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-11-25 00:09:31,710 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:09:31,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:09:31,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976145267] [2023-11-25 00:09:31,711 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:09:31,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708729143] [2023-11-25 00:09:31,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708729143] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:09:31,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:09:31,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-25 00:09:31,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777211140] [2023-11-25 00:09:31,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:09:31,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-25 00:09:31,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:09:31,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-25 00:09:31,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:09:31,714 INFO L87 Difference]: Start difference. First operand 126 states and 153 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-25 00:09:33,310 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-25 00:09:35,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:09:35,693 INFO L93 Difference]: Finished difference Result 158 states and 188 transitions. [2023-11-25 00:09:35,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-25 00:09:35,693 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) Word has length 103 [2023-11-25 00:09:35,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:09:35,695 INFO L225 Difference]: With dead ends: 158 [2023-11-25 00:09:35,696 INFO L226 Difference]: Without dead ends: 126 [2023-11-25 00:09:35,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 98 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 00:09:35,697 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 2 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-11-25 00:09:35,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 632 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-11-25 00:09:35,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-11-25 00:09:35,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 122. [2023-11-25 00:09:35,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 70 states have (on average 1.1285714285714286) internal successors, (79), 71 states have internal predecessors, (79), 34 states have call successors, (34), 17 states have call predecessors, (34), 17 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-25 00:09:35,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 146 transitions. [2023-11-25 00:09:35,716 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 146 transitions. Word has length 103 [2023-11-25 00:09:35,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:09:35,717 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 146 transitions. [2023-11-25 00:09:35,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-25 00:09:35,717 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 146 transitions. [2023-11-25 00:09:35,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-11-25 00:09:35,719 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:09:35,720 INFO L195 NwaCegarLoop]: trace histogram [8, 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 00:09:35,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d798d11-829b-41e1-a108-5a2945af9616/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-25 00:09:35,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d798d11-829b-41e1-a108-5a2945af9616/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:09:35,937 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:09:35,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:09:35,937 INFO L85 PathProgramCache]: Analyzing trace with hash 627858432, now seen corresponding path program 1 times [2023-11-25 00:09:35,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:09:35,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136609742] [2023-11-25 00:09:35,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:09:35,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:09:36,103 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:09:36,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [338025949] [2023-11-25 00:09:36,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:09:36,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:09:36,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d798d11-829b-41e1-a108-5a2945af9616/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:09:36,105 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d798d11-829b-41e1-a108-5a2945af9616/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:09:36,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d798d11-829b-41e1-a108-5a2945af9616/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-25 00:09:36,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:09:36,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 2753 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-25 00:09:37,009 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:09:37,068 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-11-25 00:09:37,068 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:09:37,068 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:09:37,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136609742] [2023-11-25 00:09:37,069 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:09:37,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338025949] [2023-11-25 00:09:37,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338025949] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:09:37,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:09:37,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-25 00:09:37,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192856715] [2023-11-25 00:09:37,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:09:37,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-25 00:09:37,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:09:37,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-25 00:09:37,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:09:37,072 INFO L87 Difference]: Start difference. First operand 122 states and 146 transitions. Second operand has 6 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-25 00:09:38,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-25 00:09:39,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:09:39,992 INFO L93 Difference]: Finished difference Result 161 states and 189 transitions. [2023-11-25 00:09:39,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-25 00:09:39,993 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) Word has length 110 [2023-11-25 00:09:39,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:09:39,994 INFO L225 Difference]: With dead ends: 161 [2023-11-25 00:09:39,994 INFO L226 Difference]: Without dead ends: 128 [2023-11-25 00:09:39,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:09:39,996 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 3 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-11-25 00:09:39,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 609 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-11-25 00:09:39,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-11-25 00:09:40,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2023-11-25 00:09:40,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 73 states have (on average 1.1232876712328768) internal successors, (82), 74 states have internal predecessors, (82), 34 states have call successors, (34), 17 states have call predecessors, (34), 18 states have return successors, (34), 34 states have call predecessors, (34), 33 states have call successors, (34) [2023-11-25 00:09:40,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 150 transitions. [2023-11-25 00:09:40,006 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 150 transitions. Word has length 110 [2023-11-25 00:09:40,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:09:40,007 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 150 transitions. [2023-11-25 00:09:40,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-25 00:09:40,007 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 150 transitions. [2023-11-25 00:09:40,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-11-25 00:09:40,009 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:09:40,009 INFO L195 NwaCegarLoop]: trace histogram [8, 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] [2023-11-25 00:09:40,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d798d11-829b-41e1-a108-5a2945af9616/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-25 00:09:40,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d798d11-829b-41e1-a108-5a2945af9616/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-25 00:09:40,217 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:09:40,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:09:40,217 INFO L85 PathProgramCache]: Analyzing trace with hash -898554175, now seen corresponding path program 1 times [2023-11-25 00:09:40,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:09:40,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501272374] [2023-11-25 00:09:40,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:09:40,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:09:40,373 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:09:40,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2125107718] [2023-11-25 00:09:40,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:09:40,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:09:40,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d798d11-829b-41e1-a108-5a2945af9616/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:09:40,375 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d798d11-829b-41e1-a108-5a2945af9616/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:09:40,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d798d11-829b-41e1-a108-5a2945af9616/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-25 00:09:41,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:09:41,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 2772 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-25 00:09:41,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:09:41,531 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-11-25 00:09:41,531 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:09:41,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:09:41,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501272374] [2023-11-25 00:09:41,532 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:09:41,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125107718] [2023-11-25 00:09:41,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125107718] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:09:41,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:09:41,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-25 00:09:41,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232423405] [2023-11-25 00:09:41,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:09:41,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-25 00:09:41,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:09:41,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-25 00:09:41,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:09:41,535 INFO L87 Difference]: Start difference. First operand 126 states and 150 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23)