./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_hash_table_clean_up_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_a13f7aeb-2835-42c9-8c68-f5443b789a65/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13f7aeb-2835-42c9-8c68-f5443b789a65/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13f7aeb-2835-42c9-8c68-f5443b789a65/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13f7aeb-2835-42c9-8c68-f5443b789a65/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_hash_table_clean_up_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13f7aeb-2835-42c9-8c68-f5443b789a65/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13f7aeb-2835-42c9-8c68-f5443b789a65/bin/utaipan-verify-NcY6lQBIFX --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 3bf4efa014e51efebc29a26fae4d93bdd4ac97a340040c60e527138ec3a88197 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:46:15,200 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:46:15,272 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13f7aeb-2835-42c9-8c68-f5443b789a65/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-12 00:46:15,279 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:46:15,279 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:46:15,324 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:46:15,325 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:46:15,325 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:46:15,326 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:46:15,327 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:46:15,327 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:46:15,328 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:46:15,328 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:46:15,329 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:46:15,330 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:46:15,330 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:46:15,331 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:46:15,331 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:46:15,332 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:46:15,333 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:46:15,333 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:46:15,334 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:46:15,335 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:46:15,336 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:46:15,336 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:46:15,337 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:46:15,337 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:46:15,338 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:46:15,338 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:46:15,339 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:46:15,339 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:46:15,340 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:46:15,340 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:46:15,341 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:46:15,341 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:46:15,342 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:46:15,353 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:46:15,353 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:46:15,354 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:46:15,354 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:46:15,355 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:46:15,356 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:46:15,356 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_a13f7aeb-2835-42c9-8c68-f5443b789a65/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13f7aeb-2835-42c9-8c68-f5443b789a65/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3bf4efa014e51efebc29a26fae4d93bdd4ac97a340040c60e527138ec3a88197 [2023-11-12 00:46:15,707 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:46:15,738 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:46:15,741 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:46:15,742 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:46:15,743 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:46:15,744 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13f7aeb-2835-42c9-8c68-f5443b789a65/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/aws-c-common/aws_hash_table_clean_up_harness.i [2023-11-12 00:46:18,877 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:46:19,523 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:46:19,524 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13f7aeb-2835-42c9-8c68-f5443b789a65/sv-benchmarks/c/aws-c-common/aws_hash_table_clean_up_harness.i [2023-11-12 00:46:19,581 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13f7aeb-2835-42c9-8c68-f5443b789a65/bin/utaipan-verify-NcY6lQBIFX/data/075831fc5/7aed54faed55446fba1844ead0576dd5/FLAGfc1da53ce [2023-11-12 00:46:19,598 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13f7aeb-2835-42c9-8c68-f5443b789a65/bin/utaipan-verify-NcY6lQBIFX/data/075831fc5/7aed54faed55446fba1844ead0576dd5 [2023-11-12 00:46:19,605 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:46:19,607 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:46:19,611 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:46:19,612 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:46:19,617 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:46:19,620 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:46:19" (1/1) ... [2023-11-12 00:46:19,621 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2894270b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:19, skipping insertion in model container [2023-11-12 00:46:19,621 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:46:19" (1/1) ... [2023-11-12 00:46:19,792 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:46:20,102 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_a13f7aeb-2835-42c9-8c68-f5443b789a65/sv-benchmarks/c/aws-c-common/aws_hash_table_clean_up_harness.i[4497,4510] [2023-11-12 00:46:20,113 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_a13f7aeb-2835-42c9-8c68-f5443b789a65/sv-benchmarks/c/aws-c-common/aws_hash_table_clean_up_harness.i[4557,4570] [2023-11-12 00:46:21,602 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:46:21,604 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:46:21,606 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:46:21,608 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:46:21,609 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:46:21,644 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:46:21,648 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:46:21,650 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:46:21,653 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:46:21,656 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:46:21,659 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:46:21,660 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:46:21,660 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:46:22,337 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-12 00:46:22,338 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-12 00:46:22,340 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-12 00:46:22,341 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-12 00:46:22,342 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-12 00:46:22,343 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-12 00:46:22,344 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-12 00:46:22,345 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-12 00:46:22,346 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-12 00:46:22,347 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-12 00:46:22,898 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:46:22,899 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:46:22,934 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:46:22,935 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:46:22,942 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:46:22,943 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:46:22,970 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:46:22,971 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:46:22,972 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:46:22,973 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:46:22,973 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:46:22,974 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:46:22,975 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:46:23,022 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:46:23,077 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:46:23,099 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_a13f7aeb-2835-42c9-8c68-f5443b789a65/sv-benchmarks/c/aws-c-common/aws_hash_table_clean_up_harness.i[4497,4510] [2023-11-12 00:46:23,100 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_a13f7aeb-2835-42c9-8c68-f5443b789a65/sv-benchmarks/c/aws-c-common/aws_hash_table_clean_up_harness.i[4557,4570] [2023-11-12 00:46:23,132 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:46:23,133 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:46:23,133 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:46:23,134 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:46:23,134 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:46:23,140 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:46:23,140 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:46:23,141 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:46:23,142 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:46:23,143 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:46:23,143 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:46:23,144 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:46:23,144 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:46:23,175 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-12 00:46:23,179 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-12 00:46:23,180 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-12 00:46:23,180 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-12 00:46:23,181 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-12 00:46:23,182 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-12 00:46:23,182 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-12 00:46:23,184 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-12 00:46:23,184 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-12 00:46:23,185 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-12 00:46:23,238 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7585-7596] [2023-11-12 00:46:23,458 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:46:23,461 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:46:23,471 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:46:23,472 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:46:23,475 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:46:23,476 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:46:23,491 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:46:23,492 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:46:23,493 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:46:23,493 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:46:23,494 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:46:23,495 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:46:23,495 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:46:23,518 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:46:23,873 WARN L672 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:46:23,874 WARN L672 CHandler]: The function equals_fn is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:46:23,874 WARN L672 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:46:23,874 WARN L672 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:46:23,874 WARN L672 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:46:23,874 WARN L672 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:46:23,874 WARN L672 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:46:23,875 WARN L672 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:46:23,875 WARN L672 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:46:23,875 WARN L672 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:46:23,875 WARN L672 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:46:23,875 WARN L672 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:46:23,875 WARN L672 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:46:23,876 WARN L672 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:46:23,876 WARN L672 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:46:23,876 WARN L672 CHandler]: The function callback is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:46:23,876 WARN L672 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:46:23,876 WARN L672 CHandler]: The function aws_array_list_ensure_capacity is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:46:23,885 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:46:23,886 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:23 WrapperNode [2023-11-12 00:46:23,886 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:46:23,888 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:46:23,888 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:46:23,888 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:46:23,896 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:23" (1/1) ... [2023-11-12 00:46:24,040 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:23" (1/1) ... [2023-11-12 00:46:24,112 INFO L138 Inliner]: procedures = 773, calls = 2446, calls flagged for inlining = 71, calls inlined = 16, statements flattened = 713 [2023-11-12 00:46:24,117 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:46:24,118 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:46:24,118 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:46:24,119 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:46:24,129 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:23" (1/1) ... [2023-11-12 00:46:24,129 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:23" (1/1) ... [2023-11-12 00:46:24,151 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:23" (1/1) ... [2023-11-12 00:46:24,151 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:23" (1/1) ... [2023-11-12 00:46:24,208 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:23" (1/1) ... [2023-11-12 00:46:24,221 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:23" (1/1) ... [2023-11-12 00:46:24,243 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:23" (1/1) ... [2023-11-12 00:46:24,250 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:23" (1/1) ... [2023-11-12 00:46:24,262 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:46:24,263 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:46:24,263 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:46:24,264 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:46:24,264 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:23" (1/1) ... [2023-11-12 00:46:24,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:46:24,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13f7aeb-2835-42c9-8c68-f5443b789a65/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:46:24,312 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13f7aeb-2835-42c9-8c68-f5443b789a65/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:46:24,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13f7aeb-2835-42c9-8c68-f5443b789a65/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:46:24,352 INFO L130 BoogieDeclarations]: Found specification of procedure memset_override_0_impl [2023-11-12 00:46:24,352 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_override_0_impl [2023-11-12 00:46:24,353 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2023-11-12 00:46:24,353 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-12 00:46:24,353 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-12 00:46:24,353 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:46:24,353 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-12 00:46:24,353 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-12 00:46:24,354 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-12 00:46:24,354 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-12 00:46:24,354 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_is_valid [2023-11-12 00:46:24,354 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_is_valid [2023-11-12 00:46:24,354 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 00:46:24,354 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:46:24,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 00:46:24,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:46:24,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:46:24,355 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-12 00:46:24,355 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-12 00:46:24,355 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-11-12 00:46:24,355 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-11-12 00:46:24,356 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2023-11-12 00:46:24,356 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2023-11-12 00:46:24,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:46:24,356 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2023-11-12 00:46:24,356 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2023-11-12 00:46:24,356 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 00:46:24,357 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-11-12 00:46:24,357 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-11-12 00:46:24,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:46:24,357 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2023-11-12 00:46:24,357 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2023-11-12 00:46:24,357 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_power_of_two [2023-11-12 00:46:24,358 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_power_of_two [2023-11-12 00:46:24,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:46:24,358 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_required_bytes [2023-11-12 00:46:24,358 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_required_bytes [2023-11-12 00:46:24,358 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2023-11-12 00:46:24,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2023-11-12 00:46:24,358 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 00:46:24,359 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 00:46:24,359 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_is_valid [2023-11-12 00:46:24,359 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_is_valid [2023-11-12 00:46:24,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-12 00:46:24,359 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-11-12 00:46:24,359 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-11-12 00:46:24,360 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-11-12 00:46:24,360 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-11-12 00:46:24,360 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2023-11-12 00:46:24,360 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2023-11-12 00:46:24,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:46:24,780 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:46:24,784 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:46:26,073 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:46:26,249 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:46:26,249 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-12 00:46:26,252 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:46:26 BoogieIcfgContainer [2023-11-12 00:46:26,252 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:46:26,255 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:46:26,255 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:46:26,258 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:46:26,259 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:46:19" (1/3) ... [2023-11-12 00:46:26,260 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25d1f227 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:46:26, skipping insertion in model container [2023-11-12 00:46:26,260 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:23" (2/3) ... [2023-11-12 00:46:26,260 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25d1f227 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:46:26, skipping insertion in model container [2023-11-12 00:46:26,260 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:46:26" (3/3) ... [2023-11-12 00:46:26,262 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_hash_table_clean_up_harness.i [2023-11-12 00:46:26,281 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:46:26,282 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:46:26,379 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:46:26,386 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;@6ac7bae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:46:26,387 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:46:26,392 INFO L276 IsEmpty]: Start isEmpty. Operand has 156 states, 88 states have (on average 1.1931818181818181) internal successors, (105), 89 states have internal predecessors, (105), 47 states have call successors, (47), 19 states have call predecessors, (47), 19 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2023-11-12 00:46:26,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-12 00:46:26,407 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:26,408 INFO L195 NwaCegarLoop]: trace histogram [10, 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] [2023-11-12 00:46:26,408 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:46:26,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:26,414 INFO L85 PathProgramCache]: Analyzing trace with hash 277840808, now seen corresponding path program 1 times [2023-11-12 00:46:26,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:26,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786437504] [2023-11-12 00:46:26,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:26,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:26,882 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:46:26,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [558668491] [2023-11-12 00:46:26,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:26,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:26,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13f7aeb-2835-42c9-8c68-f5443b789a65/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:46:26,887 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13f7aeb-2835-42c9-8c68-f5443b789a65/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:46:26,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13f7aeb-2835-42c9-8c68-f5443b789a65/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:46:27,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:27,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 2277 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 00:46:27,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:46:27,770 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-12 00:46:27,771 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:46:27,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:27,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786437504] [2023-11-12 00:46:27,771 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:46:27,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558668491] [2023-11-12 00:46:27,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558668491] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:46:27,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:46:27,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 00:46:27,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909219034] [2023-11-12 00:46:27,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:46:27,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:46:27,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:46:27,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:46:27,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:46:27,826 INFO L87 Difference]: Start difference. First operand has 156 states, 88 states have (on average 1.1931818181818181) internal successors, (105), 89 states have internal predecessors, (105), 47 states have call successors, (47), 19 states have call predecessors, (47), 19 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) Second operand has 5 states, 4 states have (on average 10.5) internal successors, (42), 5 states have internal predecessors, (42), 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) [2023-11-12 00:46:28,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:46:28,476 INFO L93 Difference]: Finished difference Result 282 states and 369 transitions. [2023-11-12 00:46:28,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:46:28,479 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 10.5) internal successors, (42), 5 states have internal predecessors, (42), 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 94 [2023-11-12 00:46:28,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:46:28,494 INFO L225 Difference]: With dead ends: 282 [2023-11-12 00:46:28,494 INFO L226 Difference]: Without dead ends: 157 [2023-11-12 00:46:28,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:46:28,504 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 1 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:46:28,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 668 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:46:28,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-11-12 00:46:28,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2023-11-12 00:46:28,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 89 states have (on average 1.1573033707865168) internal successors, (103), 90 states have internal predecessors, (103), 47 states have call successors, (47), 19 states have call predecessors, (47), 20 states have return successors, (47), 47 states have call predecessors, (47), 46 states have call successors, (47) [2023-11-12 00:46:28,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 197 transitions. [2023-11-12 00:46:28,580 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 197 transitions. Word has length 94 [2023-11-12 00:46:28,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:46:28,582 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 197 transitions. [2023-11-12 00:46:28,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 10.5) internal successors, (42), 5 states have internal predecessors, (42), 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) [2023-11-12 00:46:28,583 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 197 transitions. [2023-11-12 00:46:28,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-11-12 00:46:28,589 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:28,589 INFO L195 NwaCegarLoop]: trace histogram [10, 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] [2023-11-12 00:46:28,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13f7aeb-2835-42c9-8c68-f5443b789a65/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:46:28,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13f7aeb-2835-42c9-8c68-f5443b789a65/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-12 00:46:28,800 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:46:28,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:28,801 INFO L85 PathProgramCache]: Analyzing trace with hash -411984902, now seen corresponding path program 1 times [2023-11-12 00:46:28,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:28,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128134071] [2023-11-12 00:46:28,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:28,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:29,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:31,642 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-11-12 00:46:31,643 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:31,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128134071] [2023-11-12 00:46:31,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128134071] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:46:31,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:46:31,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-12 00:46:31,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937031173] [2023-11-12 00:46:31,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:46:31,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 00:46:31,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:46:31,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 00:46:31,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:46:31,648 INFO L87 Difference]: Start difference. First operand 157 states and 197 transitions. Second operand has 8 states, 6 states have (on average 7.0) internal successors, (42), 7 states have internal predecessors, (42), 4 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2023-11-12 00:46:32,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:46:32,689 INFO L93 Difference]: Finished difference Result 266 states and 338 transitions. [2023-11-12 00:46:32,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 00:46:32,690 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 7.0) internal successors, (42), 7 states have internal predecessors, (42), 4 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 98 [2023-11-12 00:46:32,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:46:32,694 INFO L225 Difference]: With dead ends: 266 [2023-11-12 00:46:32,694 INFO L226 Difference]: Without dead ends: 159 [2023-11-12 00:46:32,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:46:32,697 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 2 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:46:32,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 1014 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-12 00:46:32,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-11-12 00:46:32,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2023-11-12 00:46:32,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 90 states have (on average 1.1555555555555554) internal successors, (104), 92 states have internal predecessors, (104), 47 states have call successors, (47), 19 states have call predecessors, (47), 21 states have return successors, (50), 47 states have call predecessors, (50), 46 states have call successors, (50) [2023-11-12 00:46:32,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 201 transitions. [2023-11-12 00:46:32,718 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 201 transitions. Word has length 98 [2023-11-12 00:46:32,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:46:32,719 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 201 transitions. [2023-11-12 00:46:32,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 7.0) internal successors, (42), 7 states have internal predecessors, (42), 4 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2023-11-12 00:46:32,720 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 201 transitions. [2023-11-12 00:46:32,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-11-12 00:46:32,724 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:32,724 INFO L195 NwaCegarLoop]: trace histogram [10, 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] [2023-11-12 00:46:32,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:46:32,725 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:46:32,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:32,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1610445860, now seen corresponding path program 1 times [2023-11-12 00:46:32,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:32,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821978718] [2023-11-12 00:46:32,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:32,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:32,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:34,135 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-11-12 00:46:34,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:34,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821978718] [2023-11-12 00:46:34,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821978718] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:46:34,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:46:34,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-12 00:46:34,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173456587] [2023-11-12 00:46:34,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:46:34,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 00:46:34,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:46:34,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 00:46:34,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2023-11-12 00:46:34,147 INFO L87 Difference]: Start difference. First operand 159 states and 201 transitions. Second operand has 11 states, 8 states have (on average 5.75) internal successors, (46), 10 states have internal predecessors, (46), 5 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (23), 5 states have call predecessors, (23), 5 states have call successors, (23) [2023-11-12 00:46:35,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:46:35,272 INFO L93 Difference]: Finished difference Result 273 states and 349 transitions. [2023-11-12 00:46:35,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 00:46:35,273 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 5.75) internal successors, (46), 10 states have internal predecessors, (46), 5 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (23), 5 states have call predecessors, (23), 5 states have call successors, (23) Word has length 104 [2023-11-12 00:46:35,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:46:35,276 INFO L225 Difference]: With dead ends: 273 [2023-11-12 00:46:35,276 INFO L226 Difference]: Without dead ends: 164 [2023-11-12 00:46:35,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2023-11-12 00:46:35,278 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 13 mSDsluCounter, 1155 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 1311 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:46:35,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 1311 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-12 00:46:35,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2023-11-12 00:46:35,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 162. [2023-11-12 00:46:35,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 92 states have (on average 1.1521739130434783) internal successors, (106), 94 states have internal predecessors, (106), 47 states have call successors, (47), 19 states have call predecessors, (47), 22 states have return successors, (51), 48 states have call predecessors, (51), 46 states have call successors, (51) [2023-11-12 00:46:35,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 204 transitions. [2023-11-12 00:46:35,311 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 204 transitions. Word has length 104 [2023-11-12 00:46:35,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:46:35,312 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 204 transitions. [2023-11-12 00:46:35,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 5.75) internal successors, (46), 10 states have internal predecessors, (46), 5 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (23), 5 states have call predecessors, (23), 5 states have call successors, (23) [2023-11-12 00:46:35,312 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 204 transitions. [2023-11-12 00:46:35,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-12 00:46:35,323 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:35,324 INFO L195 NwaCegarLoop]: trace histogram [10, 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] [2023-11-12 00:46:35,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 00:46:35,324 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:46:35,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:35,325 INFO L85 PathProgramCache]: Analyzing trace with hash -768282046, now seen corresponding path program 1 times [2023-11-12 00:46:35,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:35,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956278534] [2023-11-12 00:46:35,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:35,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:35,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:37,205 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2023-11-12 00:46:37,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:37,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956278534] [2023-11-12 00:46:37,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956278534] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:46:37,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:46:37,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-12 00:46:37,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527126899] [2023-11-12 00:46:37,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:46:37,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 00:46:37,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:46:37,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 00:46:37,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:46:37,209 INFO L87 Difference]: Start difference. First operand 162 states and 204 transitions. Second operand has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2023-11-12 00:46:38,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:46:38,963 INFO L93 Difference]: Finished difference Result 169 states and 210 transitions. [2023-11-12 00:46:38,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 00:46:38,965 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 108 [2023-11-12 00:46:38,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:46:38,968 INFO L225 Difference]: With dead ends: 169 [2023-11-12 00:46:38,968 INFO L226 Difference]: Without dead ends: 167 [2023-11-12 00:46:38,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-11-12 00:46:38,969 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 59 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 953 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-12 00:46:38,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 953 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-12 00:46:38,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-11-12 00:46:39,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2023-11-12 00:46:39,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 95 states have (on average 1.1473684210526316) internal successors, (109), 97 states have internal predecessors, (109), 47 states have call successors, (47), 20 states have call predecessors, (47), 23 states have return successors, (51), 48 states have call predecessors, (51), 46 states have call successors, (51) [2023-11-12 00:46:39,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 207 transitions. [2023-11-12 00:46:39,008 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 207 transitions. Word has length 108 [2023-11-12 00:46:39,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:46:39,012 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 207 transitions. [2023-11-12 00:46:39,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2023-11-12 00:46:39,012 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 207 transitions. [2023-11-12 00:46:39,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-12 00:46:39,017 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:39,017 INFO L195 NwaCegarLoop]: trace histogram [11, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:46:39,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 00:46:39,018 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:46:39,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:39,018 INFO L85 PathProgramCache]: Analyzing trace with hash 2135619801, now seen corresponding path program 1 times [2023-11-12 00:46:39,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:39,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623415299] [2023-11-12 00:46:39,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:39,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:39,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:45,762 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-11-12 00:46:45,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:45,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623415299] [2023-11-12 00:46:45,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623415299] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:46:45,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:46:45,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-11-12 00:46:45,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434655690] [2023-11-12 00:46:45,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:46:45,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-12 00:46:45,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:46:45,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-12 00:46:45,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2023-11-12 00:46:45,765 INFO L87 Difference]: Start difference. First operand 166 states and 207 transitions. Second operand has 20 states, 18 states have (on average 3.0) internal successors, (54), 19 states have internal predecessors, (54), 14 states have call successors, (28), 3 states have call predecessors, (28), 4 states have return successors, (27), 15 states have call predecessors, (27), 14 states have call successors, (27) [2023-11-12 00:46:48,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:46:48,894 INFO L93 Difference]: Finished difference Result 189 states and 229 transitions. [2023-11-12 00:46:48,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-12 00:46:48,895 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.0) internal successors, (54), 19 states have internal predecessors, (54), 14 states have call successors, (28), 3 states have call predecessors, (28), 4 states have return successors, (27), 15 states have call predecessors, (27), 14 states have call successors, (27) Word has length 123 [2023-11-12 00:46:48,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:46:48,898 INFO L225 Difference]: With dead ends: 189 [2023-11-12 00:46:48,898 INFO L226 Difference]: Without dead ends: 166 [2023-11-12 00:46:48,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2023-11-12 00:46:48,900 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 190 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 1449 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 674 SdHoareTripleChecker+Invalid, 1589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-11-12 00:46:48,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 674 Invalid, 1589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1449 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-11-12 00:46:48,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2023-11-12 00:46:48,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2023-11-12 00:46:48,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 95 states have (on average 1.1368421052631579) internal successors, (108), 97 states have internal predecessors, (108), 47 states have call successors, (47), 20 states have call predecessors, (47), 23 states have return successors, (51), 48 states have call predecessors, (51), 46 states have call successors, (51) [2023-11-12 00:46:48,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 206 transitions. [2023-11-12 00:46:48,935 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 206 transitions. Word has length 123 [2023-11-12 00:46:48,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:46:48,935 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 206 transitions. [2023-11-12 00:46:48,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 3.0) internal successors, (54), 19 states have internal predecessors, (54), 14 states have call successors, (28), 3 states have call predecessors, (28), 4 states have return successors, (27), 15 states have call predecessors, (27), 14 states have call successors, (27) [2023-11-12 00:46:48,936 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 206 transitions. [2023-11-12 00:46:48,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-11-12 00:46:48,939 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:48,940 INFO L195 NwaCegarLoop]: trace histogram [12, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:46:48,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 00:46:48,940 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:46:48,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:48,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1661380483, now seen corresponding path program 1 times [2023-11-12 00:46:48,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:48,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759230937] [2023-11-12 00:46:48,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:48,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:49,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:49,686 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2023-11-12 00:46:49,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:49,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759230937] [2023-11-12 00:46:49,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759230937] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:46:49,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:46:49,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 00:46:49,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160564136] [2023-11-12 00:46:49,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:46:49,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:46:49,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:46:49,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:46:49,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:46:49,691 INFO L87 Difference]: Start difference. First operand 166 states and 206 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 3 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2023-11-12 00:46:50,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:46:50,145 INFO L93 Difference]: Finished difference Result 257 states and 316 transitions. [2023-11-12 00:46:50,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:46:50,146 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 3 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) Word has length 125 [2023-11-12 00:46:50,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:46:50,148 INFO L225 Difference]: With dead ends: 257 [2023-11-12 00:46:50,148 INFO L226 Difference]: Without dead ends: 166 [2023-11-12 00:46:50,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:46:50,150 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 5 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:46:50,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 461 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:46:50,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2023-11-12 00:46:50,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2023-11-12 00:46:50,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 95 states have (on average 1.1263157894736842) internal successors, (107), 97 states have internal predecessors, (107), 47 states have call successors, (47), 20 states have call predecessors, (47), 23 states have return successors, (51), 48 states have call predecessors, (51), 46 states have call successors, (51) [2023-11-12 00:46:50,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 205 transitions. [2023-11-12 00:46:50,184 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 205 transitions. Word has length 125 [2023-11-12 00:46:50,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:46:50,185 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 205 transitions. [2023-11-12 00:46:50,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 3 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2023-11-12 00:46:50,186 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 205 transitions. [2023-11-12 00:46:50,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-11-12 00:46:50,189 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:50,190 INFO L195 NwaCegarLoop]: trace histogram [12, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:46:50,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 00:46:50,191 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:46:50,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:50,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1699251452, now seen corresponding path program 1 times [2023-11-12 00:46:50,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:50,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874086026] [2023-11-12 00:46:50,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:50,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:50,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:52,206 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-11-12 00:46:52,207 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:52,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874086026] [2023-11-12 00:46:52,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874086026] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:46:52,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026215637] [2023-11-12 00:46:52,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:52,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:52,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13f7aeb-2835-42c9-8c68-f5443b789a65/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:46:52,210 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13f7aeb-2835-42c9-8c68-f5443b789a65/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:46:52,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13f7aeb-2835-42c9-8c68-f5443b789a65/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:46:52,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:52,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 2446 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-12 00:46:52,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:46:53,134 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 43 proven. 1 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2023-11-12 00:46:53,135 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:46:53,484 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-11-12 00:46:53,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026215637] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:46:53,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [364007695] [2023-11-12 00:46:53,517 INFO L159 IcfgInterpreter]: Started Sifa with 96 locations of interest [2023-11-12 00:46:53,518 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:46:53,524 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:46:53,531 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:46:53,532 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs