./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 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_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.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_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya --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 Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 3bf4efa014e51efebc29a26fae4d93bdd4ac97a340040c60e527138ec3a88197 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 02:19:39,938 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 02:19:40,000 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-64bit-Automizer_Default.epf [2023-11-29 02:19:40,005 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 02:19:40,006 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 02:19:40,031 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 02:19:40,032 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 02:19:40,032 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 02:19:40,033 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 02:19:40,034 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 02:19:40,034 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 02:19:40,035 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 02:19:40,035 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 02:19:40,036 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 02:19:40,036 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 02:19:40,037 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 02:19:40,038 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 02:19:40,038 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 02:19:40,038 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 02:19:40,039 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 02:19:40,039 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 02:19:40,040 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 02:19:40,041 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 02:19:40,041 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 02:19:40,041 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 02:19:40,042 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 02:19:40,042 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 02:19:40,043 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 02:19:40,043 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:19:40,043 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 02:19:40,044 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 02:19:40,044 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 02:19:40,044 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 02:19:40,045 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 02:19:40,045 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 02:19:40,045 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 02:19:40,045 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 02:19:40,045 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 02:19:40,046 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 02:19:40,046 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3bf4efa014e51efebc29a26fae4d93bdd4ac97a340040c60e527138ec3a88197 [2023-11-29 02:19:40,257 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 02:19:40,279 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 02:19:40,282 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 02:19:40,283 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 02:19:40,283 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 02:19:40,285 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/aws-c-common/aws_hash_table_clean_up_harness.i [2023-11-29 02:19:43,026 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 02:19:43,477 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 02:19:43,478 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/sv-benchmarks/c/aws-c-common/aws_hash_table_clean_up_harness.i [2023-11-29 02:19:43,510 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/data/63dbc77e0/32e2061989224a2fae9b7cb7aa50517e/FLAG339509686 [2023-11-29 02:19:43,523 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/data/63dbc77e0/32e2061989224a2fae9b7cb7aa50517e [2023-11-29 02:19:43,526 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 02:19:43,527 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 02:19:43,528 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 02:19:43,529 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 02:19:43,534 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 02:19:43,534 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:19:43" (1/1) ... [2023-11-29 02:19:43,535 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fc5c4d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:19:43, skipping insertion in model container [2023-11-29 02:19:43,535 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:19:43" (1/1) ... [2023-11-29 02:19:43,687 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 02:19:43,962 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_5cfa361e-c1b2-4a52-9728-922d3b3db817/sv-benchmarks/c/aws-c-common/aws_hash_table_clean_up_harness.i[4497,4510] [2023-11-29 02:19:43,973 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_5cfa361e-c1b2-4a52-9728-922d3b3db817/sv-benchmarks/c/aws-c-common/aws_hash_table_clean_up_harness.i[4557,4570] [2023-11-29 02:19:45,139 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:19:45,140 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:19:45,140 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:19:45,141 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:19:45,143 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:19:45,158 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:19:45,158 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:19:45,160 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:19:45,161 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:19:45,163 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:19:45,164 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:19:45,165 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:19:45,166 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:19:45,582 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-29 02:19:45,583 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-29 02:19:45,584 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-29 02:19:45,586 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-29 02:19:45,587 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-29 02:19:45,588 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-29 02:19:45,588 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-29 02:19:45,589 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-29 02:19:45,590 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-29 02:19:45,590 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-29 02:19:46,068 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:19:46,069 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:19:46,092 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:19:46,093 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:19:46,100 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:19:46,100 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:19:46,114 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:19:46,115 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:19:46,115 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:19:46,115 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:19:46,116 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:19:46,116 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:19:46,117 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:19:46,185 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:19:46,217 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 02:19:46,230 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_5cfa361e-c1b2-4a52-9728-922d3b3db817/sv-benchmarks/c/aws-c-common/aws_hash_table_clean_up_harness.i[4497,4510] [2023-11-29 02:19:46,231 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_5cfa361e-c1b2-4a52-9728-922d3b3db817/sv-benchmarks/c/aws-c-common/aws_hash_table_clean_up_harness.i[4557,4570] [2023-11-29 02:19:46,266 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:19:46,267 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:19:46,267 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:19:46,268 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:19:46,268 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:19:46,274 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:19:46,274 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:19:46,275 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:19:46,276 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:19:46,277 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:19:46,277 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:19:46,278 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:19:46,278 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:19:46,308 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-29 02:19:46,309 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-29 02:19:46,310 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-29 02:19:46,311 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-29 02:19:46,312 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-29 02:19:46,312 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-29 02:19:46,313 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-29 02:19:46,313 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-29 02:19:46,313 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-29 02:19:46,314 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-29 02:19:46,350 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7585-7596] [2023-11-29 02:19:46,421 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:19:46,421 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:19:46,427 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:19:46,428 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:19:46,430 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:19:46,430 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:19:46,438 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:19:46,439 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:19:46,439 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:19:46,439 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:19:46,439 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:19:46,440 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:19:46,440 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:19:46,455 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:19:46,783 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:19:46,783 WARN L675 CHandler]: The function equals_fn is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:19:46,784 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:19:46,784 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:19:46,784 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:19:46,784 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:19:46,784 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:19:46,784 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:19:46,784 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:19:46,784 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:19:46,784 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:19:46,785 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:19:46,785 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:19:46,785 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:19:46,785 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:19:46,785 WARN L675 CHandler]: The function callback is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:19:46,785 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:19:46,785 WARN L675 CHandler]: The function aws_array_list_ensure_capacity is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:19:46,793 INFO L206 MainTranslator]: Completed translation [2023-11-29 02:19:46,793 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:19:46 WrapperNode [2023-11-29 02:19:46,793 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 02:19:46,794 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 02:19:46,794 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 02:19:46,794 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 02:19:46,802 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:19:46" (1/1) ... [2023-11-29 02:19:46,892 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:19:46" (1/1) ... [2023-11-29 02:19:46,962 INFO L138 Inliner]: procedures = 773, calls = 2446, calls flagged for inlining = 71, calls inlined = 16, statements flattened = 713 [2023-11-29 02:19:46,963 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 02:19:46,963 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 02:19:46,963 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 02:19:46,964 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 02:19:46,976 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:19:46" (1/1) ... [2023-11-29 02:19:46,976 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:19:46" (1/1) ... [2023-11-29 02:19:46,984 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:19:46" (1/1) ... [2023-11-29 02:19:47,062 INFO L175 MemorySlicer]: Split 305 memory accesses to 9 slices as follows [2, 236, 2, 1, 2, 16, 37, 6, 3]. 77 percent of accesses are in the largest equivalence class. The 246 initializations are split as follows [2, 236, 0, 0, 0, 0, 0, 5, 3]. The 11 writes are split as follows [0, 0, 1, 1, 1, 2, 6, 0, 0]. [2023-11-29 02:19:47,063 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:19:46" (1/1) ... [2023-11-29 02:19:47,063 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:19:46" (1/1) ... [2023-11-29 02:19:47,099 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:19:46" (1/1) ... [2023-11-29 02:19:47,104 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:19:46" (1/1) ... [2023-11-29 02:19:47,117 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:19:46" (1/1) ... [2023-11-29 02:19:47,124 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:19:46" (1/1) ... [2023-11-29 02:19:47,139 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 02:19:47,140 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 02:19:47,140 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 02:19:47,140 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 02:19:47,141 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:19:46" (1/1) ... [2023-11-29 02:19:47,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:19:47,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:19:47,167 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 02:19:47,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 02:19:47,215 INFO L130 BoogieDeclarations]: Found specification of procedure memset_override_0_impl [2023-11-29 02:19:47,215 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_override_0_impl [2023-11-29 02:19:47,215 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#0 [2023-11-29 02:19:47,216 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#1 [2023-11-29 02:19:47,216 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#2 [2023-11-29 02:19:47,216 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#3 [2023-11-29 02:19:47,216 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#4 [2023-11-29 02:19:47,216 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#5 [2023-11-29 02:19:47,216 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#6 [2023-11-29 02:19:47,216 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#7 [2023-11-29 02:19:47,216 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#8 [2023-11-29 02:19:47,216 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-29 02:19:47,216 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-29 02:19:47,217 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 02:19:47,217 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 02:19:47,217 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 02:19:47,217 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 02:19:47,217 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-29 02:19:47,217 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-29 02:19:47,217 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2023-11-29 02:19:47,217 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2023-11-29 02:19:47,217 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#8 [2023-11-29 02:19:47,217 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-29 02:19:47,218 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-29 02:19:47,218 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-29 02:19:47,218 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-29 02:19:47,218 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_is_valid [2023-11-29 02:19:47,218 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_is_valid [2023-11-29 02:19:47,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 02:19:47,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 02:19:47,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-29 02:19:47,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-29 02:19:47,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-29 02:19:47,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-29 02:19:47,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2023-11-29 02:19:47,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#5 [2023-11-29 02:19:47,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#6 [2023-11-29 02:19:47,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#7 [2023-11-29 02:19:47,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#8 [2023-11-29 02:19:47,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 02:19:47,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 02:19:47,219 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-29 02:19:47,219 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-29 02:19:47,219 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-11-29 02:19:47,220 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-11-29 02:19:47,220 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2023-11-29 02:19:47,220 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2023-11-29 02:19:47,220 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 02:19:47,220 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2023-11-29 02:19:47,220 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2023-11-29 02:19:47,220 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-29 02:19:47,220 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-29 02:19:47,220 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-29 02:19:47,220 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-29 02:19:47,221 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2023-11-29 02:19:47,221 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#5 [2023-11-29 02:19:47,221 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#6 [2023-11-29 02:19:47,221 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#7 [2023-11-29 02:19:47,221 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#8 [2023-11-29 02:19:47,221 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-11-29 02:19:47,221 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-11-29 02:19:47,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 02:19:47,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 02:19:47,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 02:19:47,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 02:19:47,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-29 02:19:47,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-29 02:19:47,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2023-11-29 02:19:47,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2023-11-29 02:19:47,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#8 [2023-11-29 02:19:47,222 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2023-11-29 02:19:47,222 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2023-11-29 02:19:47,222 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_power_of_two [2023-11-29 02:19:47,222 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_power_of_two [2023-11-29 02:19:47,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 02:19:47,223 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_required_bytes [2023-11-29 02:19:47,223 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_required_bytes [2023-11-29 02:19:47,223 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2023-11-29 02:19:47,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2023-11-29 02:19:47,223 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 02:19:47,223 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 02:19:47,223 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_is_valid [2023-11-29 02:19:47,223 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_is_valid [2023-11-29 02:19:47,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-11-29 02:19:47,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-11-29 02:19:47,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-11-29 02:19:47,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2023-11-29 02:19:47,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2023-11-29 02:19:47,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#5 [2023-11-29 02:19:47,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#6 [2023-11-29 02:19:47,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#7 [2023-11-29 02:19:47,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#8 [2023-11-29 02:19:47,224 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-11-29 02:19:47,224 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-11-29 02:19:47,224 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-11-29 02:19:47,224 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-11-29 02:19:47,225 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2023-11-29 02:19:47,225 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2023-11-29 02:19:47,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 02:19:47,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 02:19:47,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 02:19:47,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 02:19:47,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 02:19:47,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-29 02:19:47,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-11-29 02:19:47,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2023-11-29 02:19:47,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2023-11-29 02:19:47,557 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 02:19:47,560 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 02:19:48,438 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 02:19:48,607 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 02:19:48,607 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-29 02:19:48,608 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:19:48 BoogieIcfgContainer [2023-11-29 02:19:48,608 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 02:19:48,611 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 02:19:48,611 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 02:19:48,614 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 02:19:48,614 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 02:19:43" (1/3) ... [2023-11-29 02:19:48,615 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cbf4662 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:19:48, skipping insertion in model container [2023-11-29 02:19:48,615 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:19:46" (2/3) ... [2023-11-29 02:19:48,615 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cbf4662 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:19:48, skipping insertion in model container [2023-11-29 02:19:48,615 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:19:48" (3/3) ... [2023-11-29 02:19:48,617 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_hash_table_clean_up_harness.i [2023-11-29 02:19:48,636 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 02:19:48,636 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 02:19:48,691 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:19:48,698 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=PETRI_NET, 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;@2d384c50, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:19:48,699 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 02:19:48,704 INFO L276 IsEmpty]: Start isEmpty. Operand has 170 states, 102 states have (on average 1.2549019607843137) internal successors, (128), 103 states have internal predecessors, (128), 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) [2023-11-29 02:19:48,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-11-29 02:19:48,721 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:19:48,722 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 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] [2023-11-29 02:19:48,722 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:19:48,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:19:48,728 INFO L85 PathProgramCache]: Analyzing trace with hash -380672864, now seen corresponding path program 1 times [2023-11-29 02:19:48,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:19:48,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17844738] [2023-11-29 02:19:48,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:19:48,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:19:49,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:49,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:19:49,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17844738] [2023-11-29 02:19:49,161 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 02:19:49,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084079114] [2023-11-29 02:19:49,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:19:49,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:19:49,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:19:49,174 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:19:49,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 02:19:49,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:49,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 2301 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 02:19:49,855 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:19:49,894 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2023-11-29 02:19:49,894 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:19:49,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084079114] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:19:49,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:19:49,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:19:49,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193156516] [2023-11-29 02:19:49,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:19:49,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 02:19:49,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:19:49,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 02:19:49,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 02:19:49,933 INFO L87 Difference]: Start difference. First operand has 170 states, 102 states have (on average 1.2549019607843137) internal successors, (128), 103 states have internal predecessors, (128), 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 2 states, 2 states have (on average 24.5) internal successors, (49), 2 states have internal predecessors, (49), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-29 02:19:50,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:19:50,142 INFO L93 Difference]: Finished difference Result 336 states and 470 transitions. [2023-11-29 02:19:50,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 02:19:50,145 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 24.5) internal successors, (49), 2 states have internal predecessors, (49), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 118 [2023-11-29 02:19:50,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:19:50,155 INFO L225 Difference]: With dead ends: 336 [2023-11-29 02:19:50,155 INFO L226 Difference]: Without dead ends: 167 [2023-11-29 02:19:50,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 02:19:50,163 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:19:50,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 195 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 02:19:50,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-11-29 02:19:50,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2023-11-29 02:19:50,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 100 states have (on average 1.2) internal successors, (120), 101 states have internal predecessors, (120), 47 states have call successors, (47), 19 states have call predecessors, (47), 19 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2023-11-29 02:19:50,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 213 transitions. [2023-11-29 02:19:50,217 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 213 transitions. Word has length 118 [2023-11-29 02:19:50,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:19:50,219 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 213 transitions. [2023-11-29 02:19:50,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 24.5) internal successors, (49), 2 states have internal predecessors, (49), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-29 02:19:50,219 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 213 transitions. [2023-11-29 02:19:50,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-11-29 02:19:50,225 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:19:50,225 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 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] [2023-11-29 02:19:50,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 02:19:50,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-29 02:19:50,426 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:19:50,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:19:50,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1204094952, now seen corresponding path program 1 times [2023-11-29 02:19:50,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:19:50,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219430992] [2023-11-29 02:19:50,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:19:50,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:19:50,527 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:19:50,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1678456187] [2023-11-29 02:19:50,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:19:50,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:19:50,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:19:50,529 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:19:50,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 02:19:51,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:51,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 2301 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 02:19:51,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:19:51,208 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2023-11-29 02:19:51,209 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:19:51,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:19:51,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219430992] [2023-11-29 02:19:51,209 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:19:51,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678456187] [2023-11-29 02:19:51,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678456187] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:19:51,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:19:51,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 02:19:51,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339563493] [2023-11-29 02:19:51,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:19:51,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 02:19:51,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:19:51,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 02:19:51,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:19:51,213 INFO L87 Difference]: Start difference. First operand 167 states and 213 transitions. Second operand has 5 states, 4 states have (on average 12.5) internal successors, (50), 5 states have internal predecessors, (50), 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) [2023-11-29 02:19:51,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:19:51,679 INFO L93 Difference]: Finished difference Result 303 states and 387 transitions. [2023-11-29 02:19:51,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:19:51,680 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 12.5) internal successors, (50), 5 states have internal predecessors, (50), 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 118 [2023-11-29 02:19:51,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:19:51,683 INFO L225 Difference]: With dead ends: 303 [2023-11-29 02:19:51,683 INFO L226 Difference]: Without dead ends: 171 [2023-11-29 02:19:51,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:19:51,686 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 1 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 756 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:19:51,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 756 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 02:19:51,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2023-11-29 02:19:51,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2023-11-29 02:19:51,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 103 states have (on average 1.1941747572815533) internal successors, (123), 104 states have internal predecessors, (123), 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) [2023-11-29 02:19:51,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 217 transitions. [2023-11-29 02:19:51,706 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 217 transitions. Word has length 118 [2023-11-29 02:19:51,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:19:51,707 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 217 transitions. [2023-11-29 02:19:51,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 12.5) internal successors, (50), 5 states have internal predecessors, (50), 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) [2023-11-29 02:19:51,707 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 217 transitions. [2023-11-29 02:19:51,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-11-29 02:19:51,710 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:19:51,711 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 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] [2023-11-29 02:19:51,720 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 02:19:51,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:19:51,912 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:19:51,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:19:51,912 INFO L85 PathProgramCache]: Analyzing trace with hash 301036168, now seen corresponding path program 1 times [2023-11-29 02:19:51,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:19:51,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051727060] [2023-11-29 02:19:51,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:19:51,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:19:52,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:53,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:19:53,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:53,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 02:19:53,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:53,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 02:19:53,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:53,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 02:19:53,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:53,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 02:19:53,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:53,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:19:53,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:53,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:19:53,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:53,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 02:19:53,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:53,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-29 02:19:53,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:53,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-29 02:19:53,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:53,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:19:53,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:53,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 02:19:53,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:53,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-29 02:19:53,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:53,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-11-29 02:19:53,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:53,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2023-11-29 02:19:53,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:53,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-29 02:19:53,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:53,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-11-29 02:19:53,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:53,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2023-11-29 02:19:53,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:53,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-29 02:19:53,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:53,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2023-11-29 02:19:53,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:53,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2023-11-29 02:19:53,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:53,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2023-11-29 02:19:53,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:53,951 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2023-11-29 02:19:53,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:19:53,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051727060] [2023-11-29 02:19:53,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051727060] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:19:53,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:19:53,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-11-29 02:19:53,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784188743] [2023-11-29 02:19:53,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:19:53,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 02:19:53,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:19:53,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 02:19:53,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-11-29 02:19:53,955 INFO L87 Difference]: Start difference. First operand 171 states and 217 transitions. Second operand has 14 states, 12 states have (on average 4.0) internal successors, (48), 9 states have internal predecessors, (48), 4 states have call successors, (23), 6 states have call predecessors, (23), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2023-11-29 02:19:56,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:19:56,271 INFO L93 Difference]: Finished difference Result 316 states and 407 transitions. [2023-11-29 02:19:56,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 02:19:56,272 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 4.0) internal successors, (48), 9 states have internal predecessors, (48), 4 states have call successors, (23), 6 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 122 [2023-11-29 02:19:56,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:19:56,276 INFO L225 Difference]: With dead ends: 316 [2023-11-29 02:19:56,276 INFO L226 Difference]: Without dead ends: 196 [2023-11-29 02:19:56,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2023-11-29 02:19:56,278 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 187 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 1386 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 1502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:19:56,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 820 Invalid, 1502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1386 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-29 02:19:56,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2023-11-29 02:19:56,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 175. [2023-11-29 02:19:56,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 106 states have (on average 1.1981132075471699) internal successors, (127), 108 states have internal predecessors, (127), 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) [2023-11-29 02:19:56,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 224 transitions. [2023-11-29 02:19:56,303 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 224 transitions. Word has length 122 [2023-11-29 02:19:56,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:19:56,304 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 224 transitions. [2023-11-29 02:19:56,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 4.0) internal successors, (48), 9 states have internal predecessors, (48), 4 states have call successors, (23), 6 states have call predecessors, (23), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2023-11-29 02:19:56,304 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 224 transitions. [2023-11-29 02:19:56,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-11-29 02:19:56,307 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:19:56,307 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 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] [2023-11-29 02:19:56,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 02:19:56,308 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:19:56,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:19:56,309 INFO L85 PathProgramCache]: Analyzing trace with hash 246643270, now seen corresponding path program 1 times [2023-11-29 02:19:56,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:19:56,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605136502] [2023-11-29 02:19:56,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:19:56,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:19:56,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:56,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:19:56,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:56,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 02:19:56,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:56,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 02:19:56,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:56,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 02:19:56,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:56,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 02:19:56,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:56,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:19:56,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:56,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:19:56,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:56,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 02:19:56,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:56,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-29 02:19:56,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:56,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-29 02:19:56,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:56,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:19:56,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:57,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 02:19:57,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:57,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-29 02:19:57,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:57,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-11-29 02:19:57,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:57,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2023-11-29 02:19:57,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:57,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-29 02:19:57,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:57,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-11-29 02:19:57,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:57,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2023-11-29 02:19:57,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:57,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-29 02:19:57,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:57,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2023-11-29 02:19:57,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:57,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2023-11-29 02:19:57,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:57,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2023-11-29 02:19:57,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:57,179 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2023-11-29 02:19:57,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:19:57,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605136502] [2023-11-29 02:19:57,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605136502] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:19:57,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:19:57,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 02:19:57,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844638505] [2023-11-29 02:19:57,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:19:57,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 02:19:57,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:19:57,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 02:19:57,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-29 02:19:57,183 INFO L87 Difference]: Start difference. First operand 175 states and 224 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (23), 6 states have call predecessors, (23), 2 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2023-11-29 02:19:58,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:19:58,689 INFO L93 Difference]: Finished difference Result 312 states and 405 transitions. [2023-11-29 02:19:58,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 02:19:58,690 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (23), 6 states have call predecessors, (23), 2 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 122 [2023-11-29 02:19:58,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:19:58,692 INFO L225 Difference]: With dead ends: 312 [2023-11-29 02:19:58,692 INFO L226 Difference]: Without dead ends: 188 [2023-11-29 02:19:58,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-11-29 02:19:58,693 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 120 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:19:58,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 549 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-29 02:19:58,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-11-29 02:19:58,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 177. [2023-11-29 02:19:58,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 107 states have (on average 1.1962616822429906) internal successors, (128), 109 states have internal predecessors, (128), 48 states have call successors, (48), 19 states have call predecessors, (48), 21 states have return successors, (51), 48 states have call predecessors, (51), 47 states have call successors, (51) [2023-11-29 02:19:58,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 227 transitions. [2023-11-29 02:19:58,715 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 227 transitions. Word has length 122 [2023-11-29 02:19:58,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:19:58,716 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 227 transitions. [2023-11-29 02:19:58,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (23), 6 states have call predecessors, (23), 2 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2023-11-29 02:19:58,716 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 227 transitions. [2023-11-29 02:19:58,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-11-29 02:19:58,719 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:19:58,719 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 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, 1, 1, 1, 1] [2023-11-29 02:19:58,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 02:19:58,719 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:19:58,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:19:58,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1859861775, now seen corresponding path program 1 times [2023-11-29 02:19:58,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:19:58,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481179924] [2023-11-29 02:19:58,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:19:58,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:19:58,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:59,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:19:59,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:59,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 02:19:59,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:59,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 02:19:59,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:59,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 02:19:59,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:59,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 02:19:59,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:59,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:19:59,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:59,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:19:59,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:59,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 02:19:59,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:59,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-29 02:19:59,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:59,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-29 02:19:59,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:59,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:19:59,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:59,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 02:19:59,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:59,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-29 02:19:59,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:59,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-11-29 02:19:59,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:59,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-11-29 02:19:59,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:59,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2023-11-29 02:19:59,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:59,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2023-11-29 02:19:59,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:59,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2023-11-29 02:19:59,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:59,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2023-11-29 02:19:59,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:59,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2023-11-29 02:19:59,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:59,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2023-11-29 02:19:59,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:59,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2023-11-29 02:19:59,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:59,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2023-11-29 02:19:59,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:59,843 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2023-11-29 02:19:59,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:19:59,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481179924] [2023-11-29 02:19:59,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481179924] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:19:59,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:19:59,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-29 02:19:59,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271444519] [2023-11-29 02:19:59,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:19:59,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 02:19:59,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:19:59,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 02:19:59,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-11-29 02:19:59,846 INFO L87 Difference]: Start difference. First operand 177 states and 227 transitions. Second operand has 11 states, 10 states have (on average 5.2) internal successors, (52), 7 states have internal predecessors, (52), 3 states have call successors, (24), 6 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 3 states have call successors, (23) [2023-11-29 02:20:01,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:20:01,661 INFO L93 Difference]: Finished difference Result 315 states and 414 transitions. [2023-11-29 02:20:01,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 02:20:01,662 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.2) internal successors, (52), 7 states have internal predecessors, (52), 3 states have call successors, (24), 6 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 3 states have call successors, (23) Word has length 128 [2023-11-29 02:20:01,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:20:01,664 INFO L225 Difference]: With dead ends: 315 [2023-11-29 02:20:01,664 INFO L226 Difference]: Without dead ends: 187 [2023-11-29 02:20:01,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2023-11-29 02:20:01,666 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 86 mSDsluCounter, 623 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-29 02:20:01,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 752 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 859 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-29 02:20:01,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2023-11-29 02:20:01,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 177. [2023-11-29 02:20:01,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 107 states have (on average 1.1869158878504673) internal successors, (127), 109 states have internal predecessors, (127), 48 states have call successors, (48), 19 states have call predecessors, (48), 21 states have return successors, (51), 48 states have call predecessors, (51), 47 states have call successors, (51) [2023-11-29 02:20:01,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 226 transitions. [2023-11-29 02:20:01,687 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 226 transitions. Word has length 128 [2023-11-29 02:20:01,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:20:01,688 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 226 transitions. [2023-11-29 02:20:01,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.2) internal successors, (52), 7 states have internal predecessors, (52), 3 states have call successors, (24), 6 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 3 states have call successors, (23) [2023-11-29 02:20:01,689 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 226 transitions. [2023-11-29 02:20:01,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-11-29 02:20:01,691 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:20:01,691 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:20:01,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 02:20:01,692 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:20:01,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:20:01,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1150769830, now seen corresponding path program 1 times [2023-11-29 02:20:01,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:20:01,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749045700] [2023-11-29 02:20:01,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:20:01,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:20:01,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:03,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:20:03,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:03,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 02:20:03,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:03,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 02:20:03,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:03,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 02:20:03,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:03,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 02:20:03,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:03,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:20:03,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:03,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:20:03,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:03,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 02:20:03,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:03,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-29 02:20:03,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:03,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-29 02:20:03,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:03,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:20:03,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:03,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 02:20:03,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:04,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-29 02:20:04,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:04,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 02:20:04,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:04,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-11-29 02:20:04,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:04,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-11-29 02:20:04,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:04,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-11-29 02:20:04,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:04,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2023-11-29 02:20:04,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:04,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2023-11-29 02:20:04,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:04,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2023-11-29 02:20:04,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:04,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2023-11-29 02:20:04,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:04,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2023-11-29 02:20:04,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:04,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2023-11-29 02:20:04,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:04,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2023-11-29 02:20:04,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:04,469 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2023-11-29 02:20:04,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:20:04,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749045700] [2023-11-29 02:20:04,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749045700] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:20:04,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:20:04,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-11-29 02:20:04,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445802010] [2023-11-29 02:20:04,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:20:04,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 02:20:04,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:20:04,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 02:20:04,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2023-11-29 02:20:04,472 INFO L87 Difference]: Start difference. First operand 177 states and 226 transitions. Second operand has 17 states, 15 states have (on average 3.533333333333333) internal successors, (53), 12 states have internal predecessors, (53), 7 states have call successors, (25), 6 states have call predecessors, (25), 3 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2023-11-29 02:20:07,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:20:07,523 INFO L93 Difference]: Finished difference Result 215 states and 271 transitions. [2023-11-29 02:20:07,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 02:20:07,524 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.533333333333333) internal successors, (53), 12 states have internal predecessors, (53), 7 states have call successors, (25), 6 states have call predecessors, (25), 3 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) Word has length 134 [2023-11-29 02:20:07,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:20:07,526 INFO L225 Difference]: With dead ends: 215 [2023-11-29 02:20:07,527 INFO L226 Difference]: Without dead ends: 194 [2023-11-29 02:20:07,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2023-11-29 02:20:07,528 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 217 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 1742 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 895 SdHoareTripleChecker+Invalid, 1846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-11-29 02:20:07,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 895 Invalid, 1846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1742 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-11-29 02:20:07,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2023-11-29 02:20:07,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 185. [2023-11-29 02:20:07,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 114 states have (on average 1.1929824561403508) internal successors, (136), 116 states have internal predecessors, (136), 48 states have call successors, (48), 20 states have call predecessors, (48), 22 states have return successors, (53), 48 states have call predecessors, (53), 47 states have call successors, (53) [2023-11-29 02:20:07,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 237 transitions. [2023-11-29 02:20:07,554 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 237 transitions. Word has length 134 [2023-11-29 02:20:07,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:20:07,555 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 237 transitions. [2023-11-29 02:20:07,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.533333333333333) internal successors, (53), 12 states have internal predecessors, (53), 7 states have call successors, (25), 6 states have call predecessors, (25), 3 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2023-11-29 02:20:07,555 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 237 transitions. [2023-11-29 02:20:07,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-11-29 02:20:07,558 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:20:07,558 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:20:07,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 02:20:07,558 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:20:07,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:20:07,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1866058681, now seen corresponding path program 1 times [2023-11-29 02:20:07,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:20:07,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990172156] [2023-11-29 02:20:07,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:20:07,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:20:07,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:07,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:20:07,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:07,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 02:20:07,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:07,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 02:20:07,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:07,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 02:20:07,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:07,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 02:20:07,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:07,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:20:07,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:07,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:20:07,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:07,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 02:20:07,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:07,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-29 02:20:07,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:07,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-29 02:20:07,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:07,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:20:07,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:07,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 02:20:07,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:07,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-29 02:20:07,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:07,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 02:20:07,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:08,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-11-29 02:20:08,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:08,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-11-29 02:20:08,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:08,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-11-29 02:20:08,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:08,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2023-11-29 02:20:08,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:08,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2023-11-29 02:20:08,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:08,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2023-11-29 02:20:08,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:08,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2023-11-29 02:20:08,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:08,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2023-11-29 02:20:08,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:08,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2023-11-29 02:20:08,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:08,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2023-11-29 02:20:08,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:08,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2023-11-29 02:20:08,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:08,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2023-11-29 02:20:08,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:08,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2023-11-29 02:20:08,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:08,116 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2023-11-29 02:20:08,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:20:08,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990172156] [2023-11-29 02:20:08,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990172156] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:20:08,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:20:08,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 02:20:08,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273720487] [2023-11-29 02:20:08,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:20:08,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 02:20:08,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:20:08,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 02:20:08,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:20:08,119 INFO L87 Difference]: Start difference. First operand 185 states and 237 transitions. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (30), 6 states have call predecessors, (30), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2023-11-29 02:20:08,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:20:08,792 INFO L93 Difference]: Finished difference Result 276 states and 347 transitions. [2023-11-29 02:20:08,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 02:20:08,793 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (30), 6 states have call predecessors, (30), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 158 [2023-11-29 02:20:08,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:20:08,796 INFO L225 Difference]: With dead ends: 276 [2023-11-29 02:20:08,796 INFO L226 Difference]: Without dead ends: 195 [2023-11-29 02:20:08,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:20:08,798 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 168 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 02:20:08,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 322 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 02:20:08,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2023-11-29 02:20:08,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 186. [2023-11-29 02:20:08,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 115 states have (on average 1.191304347826087) internal successors, (137), 117 states have internal predecessors, (137), 48 states have call successors, (48), 20 states have call predecessors, (48), 22 states have return successors, (53), 48 states have call predecessors, (53), 47 states have call successors, (53) [2023-11-29 02:20:08,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 238 transitions. [2023-11-29 02:20:08,819 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 238 transitions. Word has length 158 [2023-11-29 02:20:08,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:20:08,820 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 238 transitions. [2023-11-29 02:20:08,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (30), 6 states have call predecessors, (30), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2023-11-29 02:20:08,821 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 238 transitions. [2023-11-29 02:20:08,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-11-29 02:20:08,823 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:20:08,823 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:20:08,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 02:20:08,824 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:20:08,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:20:08,824 INFO L85 PathProgramCache]: Analyzing trace with hash 844990327, now seen corresponding path program 1 times [2023-11-29 02:20:08,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:20:08,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963846882] [2023-11-29 02:20:08,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:20:08,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:20:08,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:09,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:20:09,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:09,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 02:20:09,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:09,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 02:20:09,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:09,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 02:20:09,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:09,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 02:20:09,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:09,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:20:09,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:09,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:20:09,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:09,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 02:20:09,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:09,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-29 02:20:09,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:09,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-29 02:20:09,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:09,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:20:09,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:09,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 02:20:09,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:09,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-29 02:20:09,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:09,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 02:20:09,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:09,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-11-29 02:20:09,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:09,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-11-29 02:20:09,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:09,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-11-29 02:20:09,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:09,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2023-11-29 02:20:09,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:09,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2023-11-29 02:20:09,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:09,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2023-11-29 02:20:09,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:09,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2023-11-29 02:20:09,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:09,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2023-11-29 02:20:09,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:09,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2023-11-29 02:20:09,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:09,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2023-11-29 02:20:09,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:09,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2023-11-29 02:20:09,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:09,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2023-11-29 02:20:09,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:09,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2023-11-29 02:20:09,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:09,710 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2023-11-29 02:20:09,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:20:09,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963846882] [2023-11-29 02:20:09,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963846882] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:20:09,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:20:09,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 02:20:09,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101168456] [2023-11-29 02:20:09,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:20:09,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 02:20:09,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:20:09,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 02:20:09,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-29 02:20:09,713 INFO L87 Difference]: Start difference. First operand 186 states and 238 transitions. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (30), 6 states have call predecessors, (30), 1 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2023-11-29 02:20:10,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:20:10,769 INFO L93 Difference]: Finished difference Result 299 states and 381 transitions. [2023-11-29 02:20:10,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 02:20:10,770 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (30), 6 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 158 [2023-11-29 02:20:10,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:20:10,772 INFO L225 Difference]: With dead ends: 299 [2023-11-29 02:20:10,772 INFO L226 Difference]: Without dead ends: 195 [2023-11-29 02:20:10,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-11-29 02:20:10,774 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 125 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:20:10,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 395 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 02:20:10,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2023-11-29 02:20:10,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 186. [2023-11-29 02:20:10,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 115 states have (on average 1.182608695652174) internal successors, (136), 117 states have internal predecessors, (136), 48 states have call successors, (48), 20 states have call predecessors, (48), 22 states have return successors, (53), 48 states have call predecessors, (53), 47 states have call successors, (53) [2023-11-29 02:20:10,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 237 transitions. [2023-11-29 02:20:10,794 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 237 transitions. Word has length 158 [2023-11-29 02:20:10,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:20:10,795 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 237 transitions. [2023-11-29 02:20:10,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (30), 6 states have call predecessors, (30), 1 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2023-11-29 02:20:10,795 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 237 transitions. [2023-11-29 02:20:10,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-11-29 02:20:10,798 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:20:10,798 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:20:10,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 02:20:10,798 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:20:10,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:20:10,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1334840777, now seen corresponding path program 1 times [2023-11-29 02:20:10,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:20:10,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101624995] [2023-11-29 02:20:10,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:20:10,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:20:10,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:12,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:20:12,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:12,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 02:20:12,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:12,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 02:20:12,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:12,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 02:20:12,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:12,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 02:20:12,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:12,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:20:12,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:12,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:20:12,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:12,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 02:20:12,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:12,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-29 02:20:12,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:12,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-29 02:20:12,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:12,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:20:12,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:12,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 02:20:12,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:13,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-29 02:20:13,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:13,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 02:20:13,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:13,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-11-29 02:20:13,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:13,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-11-29 02:20:13,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:13,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-11-29 02:20:13,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:13,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2023-11-29 02:20:13,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:13,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2023-11-29 02:20:13,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:13,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2023-11-29 02:20:13,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:13,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2023-11-29 02:20:13,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:13,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2023-11-29 02:20:13,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:13,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2023-11-29 02:20:13,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:13,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2023-11-29 02:20:13,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:13,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2023-11-29 02:20:13,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:13,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2023-11-29 02:20:13,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:13,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2023-11-29 02:20:13,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:13,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2023-11-29 02:20:13,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:13,318 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-11-29 02:20:13,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:20:13,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101624995] [2023-11-29 02:20:13,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101624995] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:20:13,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736765766] [2023-11-29 02:20:13,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:20:13,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:20:13,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:20:13,320 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:20:13,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 02:20:13,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:13,807 INFO L262 TraceCheckSpWp]: Trace formula consists of 2487 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-29 02:20:13,817 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:20:13,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:20:15,466 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 210 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-11-29 02:20:15,467 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:20:15,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736765766] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:20:15,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:20:15,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [19] total 29 [2023-11-29 02:20:15,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67894121] [2023-11-29 02:20:15,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:20:15,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 02:20:15,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:20:15,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 02:20:15,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2023-11-29 02:20:15,470 INFO L87 Difference]: Start difference. First operand 186 states and 237 transitions. Second operand has 12 states, 11 states have (on average 7.090909090909091) internal successors, (78), 11 states have internal predecessors, (78), 6 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (28), 7 states have call predecessors, (28), 6 states have call successors, (28) [2023-11-29 02:20:20,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:20:24,970 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:20:29,004 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:20:33,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:20:37,950 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:20:37,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:20:37,968 INFO L93 Difference]: Finished difference Result 314 states and 391 transitions. [2023-11-29 02:20:37,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 02:20:37,969 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 7.090909090909091) internal successors, (78), 11 states have internal predecessors, (78), 6 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (28), 7 states have call predecessors, (28), 6 states have call successors, (28) Word has length 166 [2023-11-29 02:20:37,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:20:37,970 INFO L225 Difference]: With dead ends: 314 [2023-11-29 02:20:37,971 INFO L226 Difference]: Without dead ends: 207 [2023-11-29 02:20:37,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 187 SyntacticMatches, 20 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 02:20:37,972 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 105 mSDsluCounter, 1210 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 38 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 1377 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:20:37,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 1377 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 745 Invalid, 5 Unknown, 0 Unchecked, 22.3s Time] [2023-11-29 02:20:37,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2023-11-29 02:20:38,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 203. [2023-11-29 02:20:38,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 128 states have (on average 1.1796875) internal successors, (151), 130 states have internal predecessors, (151), 48 states have call successors, (48), 24 states have call predecessors, (48), 26 states have return successors, (53), 48 states have call predecessors, (53), 47 states have call successors, (53) [2023-11-29 02:20:38,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 252 transitions. [2023-11-29 02:20:38,005 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 252 transitions. Word has length 166 [2023-11-29 02:20:38,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:20:38,006 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 252 transitions. [2023-11-29 02:20:38,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 7.090909090909091) internal successors, (78), 11 states have internal predecessors, (78), 6 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (28), 7 states have call predecessors, (28), 6 states have call successors, (28) [2023-11-29 02:20:38,007 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 252 transitions. [2023-11-29 02:20:38,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-11-29 02:20:38,009 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:20:38,009 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:20:38,019 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 02:20:38,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:20:38,215 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:20:38,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:20:38,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1086694283, now seen corresponding path program 1 times [2023-11-29 02:20:38,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:20:38,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134973335] [2023-11-29 02:20:38,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:20:38,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:20:38,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:38,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:20:38,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:38,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 02:20:38,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:38,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 02:20:38,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:38,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 02:20:38,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:38,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 02:20:38,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:38,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:20:38,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:38,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:20:38,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:38,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 02:20:38,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:38,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-29 02:20:38,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:38,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-29 02:20:38,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:38,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:20:38,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:38,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 02:20:38,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:38,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-29 02:20:38,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:38,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 02:20:38,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:38,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-11-29 02:20:38,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:38,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-11-29 02:20:38,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:38,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-11-29 02:20:38,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:38,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2023-11-29 02:20:38,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:38,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2023-11-29 02:20:38,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:38,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2023-11-29 02:20:38,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:38,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2023-11-29 02:20:38,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:38,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2023-11-29 02:20:38,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:38,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2023-11-29 02:20:38,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:38,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2023-11-29 02:20:38,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:38,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2023-11-29 02:20:38,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:38,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2023-11-29 02:20:38,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:38,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2023-11-29 02:20:38,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:38,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2023-11-29 02:20:38,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:38,864 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2023-11-29 02:20:38,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:20:38,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134973335] [2023-11-29 02:20:38,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134973335] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:20:38,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502566707] [2023-11-29 02:20:38,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:20:38,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:20:38,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:20:38,866 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:20:38,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 02:20:39,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:39,413 INFO L262 TraceCheckSpWp]: Trace formula consists of 2482 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 02:20:39,419 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:20:39,547 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2023-11-29 02:20:39,547 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:20:39,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502566707] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:20:39,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:20:39,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2023-11-29 02:20:39,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961834048] [2023-11-29 02:20:39,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:20:39,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:20:39,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:20:39,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:20:39,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-11-29 02:20:39,550 INFO L87 Difference]: Start difference. First operand 203 states and 252 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2023-11-29 02:20:39,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:20:39,979 INFO L93 Difference]: Finished difference Result 318 states and 394 transitions. [2023-11-29 02:20:39,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 02:20:39,980 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 166 [2023-11-29 02:20:39,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:20:39,981 INFO L225 Difference]: With dead ends: 318 [2023-11-29 02:20:39,982 INFO L226 Difference]: Without dead ends: 203 [2023-11-29 02:20:39,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-11-29 02:20:39,983 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 64 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:20:39,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 801 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 02:20:39,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2023-11-29 02:20:40,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 199. [2023-11-29 02:20:40,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 125 states have (on average 1.168) internal successors, (146), 126 states have internal predecessors, (146), 48 states have call successors, (48), 24 states have call predecessors, (48), 25 states have return successors, (50), 48 states have call predecessors, (50), 47 states have call successors, (50) [2023-11-29 02:20:40,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 244 transitions. [2023-11-29 02:20:40,005 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 244 transitions. Word has length 166 [2023-11-29 02:20:40,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:20:40,005 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 244 transitions. [2023-11-29 02:20:40,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2023-11-29 02:20:40,005 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 244 transitions. [2023-11-29 02:20:40,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-11-29 02:20:40,006 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:20:40,007 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:20:40,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-29 02:20:40,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 02:20:40,215 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:20:40,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:20:40,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1751277065, now seen corresponding path program 2 times [2023-11-29 02:20:40,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:20:40,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314534062] [2023-11-29 02:20:40,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:20:40,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:20:40,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:41,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:20:41,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:41,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 02:20:41,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:41,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 02:20:41,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:41,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 02:20:41,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:41,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 02:20:41,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:41,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:20:41,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:41,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:20:41,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:41,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 02:20:41,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:41,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-29 02:20:41,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:41,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-29 02:20:41,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:41,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:20:41,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:41,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 02:20:41,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:41,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-29 02:20:41,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:41,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 02:20:41,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:41,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-11-29 02:20:41,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:41,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-11-29 02:20:41,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:41,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-11-29 02:20:41,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:41,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2023-11-29 02:20:41,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:41,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2023-11-29 02:20:41,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:42,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2023-11-29 02:20:42,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:42,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2023-11-29 02:20:42,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:42,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2023-11-29 02:20:42,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:42,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2023-11-29 02:20:42,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:42,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2023-11-29 02:20:42,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:42,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-29 02:20:42,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:42,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 02:20:42,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:42,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2023-11-29 02:20:42,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:42,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2023-11-29 02:20:42,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:42,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2023-11-29 02:20:42,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:42,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2023-11-29 02:20:42,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:42,162 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2023-11-29 02:20:42,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:20:42,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314534062] [2023-11-29 02:20:42,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314534062] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:20:42,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91608095] [2023-11-29 02:20:42,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:20:42,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:20:42,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:20:42,163 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:20:42,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 02:20:42,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:20:42,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:20:42,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 2542 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 02:20:42,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:20:42,996 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2023-11-29 02:20:42,996 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:20:42,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91608095] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:20:42,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:20:42,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [20] total 25 [2023-11-29 02:20:42,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19632106] [2023-11-29 02:20:42,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:20:42,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 02:20:42,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:20:42,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 02:20:42,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=545, Unknown=0, NotChecked=0, Total=600 [2023-11-29 02:20:42,999 INFO L87 Difference]: Start difference. First operand 199 states and 244 transitions. Second operand has 7 states, 5 states have (on average 14.0) internal successors, (70), 6 states have internal predecessors, (70), 3 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-11-29 02:20:43,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:20:43,648 INFO L93 Difference]: Finished difference Result 390 states and 476 transitions. [2023-11-29 02:20:43,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 02:20:43,648 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 14.0) internal successors, (70), 6 states have internal predecessors, (70), 3 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 178 [2023-11-29 02:20:43,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:20:43,650 INFO L225 Difference]: With dead ends: 390 [2023-11-29 02:20:43,650 INFO L226 Difference]: Without dead ends: 201 [2023-11-29 02:20:43,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=591, Unknown=0, NotChecked=0, Total=650 [2023-11-29 02:20:43,652 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 2 mSDsluCounter, 826 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 999 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 02:20:43,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 999 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 02:20:43,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-11-29 02:20:43,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 199. [2023-11-29 02:20:43,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 125 states have (on average 1.16) internal successors, (145), 126 states have internal predecessors, (145), 48 states have call successors, (48), 24 states have call predecessors, (48), 25 states have return successors, (50), 48 states have call predecessors, (50), 47 states have call successors, (50) [2023-11-29 02:20:43,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 243 transitions. [2023-11-29 02:20:43,678 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 243 transitions. Word has length 178 [2023-11-29 02:20:43,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:20:43,678 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 243 transitions. [2023-11-29 02:20:43,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 14.0) internal successors, (70), 6 states have internal predecessors, (70), 3 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-11-29 02:20:43,678 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 243 transitions. [2023-11-29 02:20:43,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2023-11-29 02:20:43,679 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:20:43,680 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:20:43,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 02:20:43,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 02:20:43,881 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:20:43,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:20:43,881 INFO L85 PathProgramCache]: Analyzing trace with hash 132075470, now seen corresponding path program 1 times [2023-11-29 02:20:43,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:20:43,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816152753] [2023-11-29 02:20:43,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:20:43,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:20:43,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:45,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:20:45,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:45,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 02:20:45,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:45,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 02:20:45,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:45,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 02:20:45,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:45,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-29 02:20:45,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:45,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:20:45,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:45,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:20:45,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:45,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 02:20:45,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:45,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 02:20:45,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:45,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-29 02:20:45,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:45,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:20:45,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:45,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-11-29 02:20:45,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:45,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-29 02:20:45,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:45,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 02:20:45,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:45,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-29 02:20:45,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:45,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2023-11-29 02:20:45,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:45,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2023-11-29 02:20:45,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:45,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-29 02:20:45,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:45,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-11-29 02:20:45,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:45,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-11-29 02:20:45,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:45,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-29 02:20:45,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:45,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2023-11-29 02:20:45,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:45,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2023-11-29 02:20:45,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:45,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2023-11-29 02:20:45,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:45,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-29 02:20:45,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:45,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 02:20:45,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:45,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2023-11-29 02:20:45,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:45,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2023-11-29 02:20:45,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:45,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2023-11-29 02:20:45,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:45,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2023-11-29 02:20:45,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:45,804 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2023-11-29 02:20:45,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:20:45,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816152753] [2023-11-29 02:20:45,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816152753] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:20:45,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364017599] [2023-11-29 02:20:45,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:20:45,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:20:45,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:20:45,806 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:20:45,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 02:20:46,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:46,344 INFO L262 TraceCheckSpWp]: Trace formula consists of 2546 conjuncts, 62 conjunts are in the unsatisfiable core [2023-11-29 02:20:46,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:20:46,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2023-11-29 02:20:46,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:20:46,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 02:20:47,537 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 160 proven. 2 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-11-29 02:20:47,537 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:20:48,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364017599] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:20:48,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:20:48,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 35 [2023-11-29 02:20:48,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722987605] [2023-11-29 02:20:48,154 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:20:48,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-29 02:20:48,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:20:48,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-29 02:20:48,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1447, Unknown=0, NotChecked=0, Total=1560 [2023-11-29 02:20:48,157 INFO L87 Difference]: Start difference. First operand 199 states and 243 transitions. Second operand has 35 states, 29 states have (on average 4.620689655172414) internal successors, (134), 28 states have internal predecessors, (134), 13 states have call successors, (61), 7 states have call predecessors, (61), 9 states have return successors, (55), 12 states have call predecessors, (55), 13 states have call successors, (55) [2023-11-29 02:20:56,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:20:56,347 INFO L93 Difference]: Finished difference Result 401 states and 481 transitions. [2023-11-29 02:20:56,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-11-29 02:20:56,348 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 29 states have (on average 4.620689655172414) internal successors, (134), 28 states have internal predecessors, (134), 13 states have call successors, (61), 7 states have call predecessors, (61), 9 states have return successors, (55), 12 states have call predecessors, (55), 13 states have call successors, (55) Word has length 180 [2023-11-29 02:20:56,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:20:56,349 INFO L225 Difference]: With dead ends: 401 [2023-11-29 02:20:56,349 INFO L226 Difference]: Without dead ends: 237 [2023-11-29 02:20:56,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1382 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=728, Invalid=5752, Unknown=0, NotChecked=0, Total=6480 [2023-11-29 02:20:56,352 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 402 mSDsluCounter, 1238 mSDsCounter, 0 mSdLazyCounter, 3248 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 1349 SdHoareTripleChecker+Invalid, 3487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 3248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-11-29 02:20:56,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 1349 Invalid, 3487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 3248 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2023-11-29 02:20:56,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2023-11-29 02:20:56,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 224. [2023-11-29 02:20:56,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 143 states have (on average 1.1398601398601398) internal successors, (163), 144 states have internal predecessors, (163), 50 states have call successors, (50), 29 states have call predecessors, (50), 30 states have return successors, (52), 50 states have call predecessors, (52), 49 states have call successors, (52) [2023-11-29 02:20:56,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 265 transitions. [2023-11-29 02:20:56,369 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 265 transitions. Word has length 180 [2023-11-29 02:20:56,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:20:56,370 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 265 transitions. [2023-11-29 02:20:56,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 29 states have (on average 4.620689655172414) internal successors, (134), 28 states have internal predecessors, (134), 13 states have call successors, (61), 7 states have call predecessors, (61), 9 states have return successors, (55), 12 states have call predecessors, (55), 13 states have call successors, (55) [2023-11-29 02:20:56,370 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 265 transitions. [2023-11-29 02:20:56,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2023-11-29 02:20:56,371 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:20:56,371 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:20:56,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-29 02:20:56,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 02:20:56,572 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:20:56,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:20:56,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1541666005, now seen corresponding path program 1 times [2023-11-29 02:20:56,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:20:56,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592310242] [2023-11-29 02:20:56,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:20:56,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:20:56,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:56,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:20:57,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:57,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 02:20:57,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:57,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 02:20:57,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:57,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 02:20:57,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:57,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-29 02:20:57,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:57,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:20:57,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:57,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:20:57,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:57,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 02:20:57,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:57,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 02:20:57,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:57,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-29 02:20:57,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:57,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:20:57,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:57,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-11-29 02:20:57,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:57,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-29 02:20:57,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:57,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 02:20:57,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:57,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2023-11-29 02:20:57,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:57,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-11-29 02:20:57,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:57,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2023-11-29 02:20:57,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:57,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2023-11-29 02:20:57,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:57,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2023-11-29 02:20:57,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:57,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2023-11-29 02:20:57,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:57,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2023-11-29 02:20:57,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:57,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2023-11-29 02:20:57,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:57,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2023-11-29 02:20:57,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:57,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2023-11-29 02:20:57,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:57,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-29 02:20:57,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:57,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 02:20:57,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:57,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2023-11-29 02:20:57,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:57,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2023-11-29 02:20:57,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:57,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2023-11-29 02:20:57,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:57,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2023-11-29 02:20:57,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:57,375 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2023-11-29 02:20:57,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:20:57,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592310242] [2023-11-29 02:20:57,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592310242] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:20:57,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:20:57,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-29 02:20:57,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720991332] [2023-11-29 02:20:57,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:20:57,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 02:20:57,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:20:57,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 02:20:57,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-11-29 02:20:57,377 INFO L87 Difference]: Start difference. First operand 224 states and 265 transitions. Second operand has 11 states, 10 states have (on average 6.7) internal successors, (67), 7 states have internal predecessors, (67), 5 states have call successors, (31), 6 states have call predecessors, (31), 2 states have return successors, (28), 4 states have call predecessors, (28), 5 states have call successors, (28) [2023-11-29 02:20:58,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:20:58,555 INFO L93 Difference]: Finished difference Result 339 states and 404 transitions. [2023-11-29 02:20:58,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 02:20:58,555 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 6.7) internal successors, (67), 7 states have internal predecessors, (67), 5 states have call successors, (31), 6 states have call predecessors, (31), 2 states have return successors, (28), 4 states have call predecessors, (28), 5 states have call successors, (28) Word has length 182 [2023-11-29 02:20:58,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:20:58,557 INFO L225 Difference]: With dead ends: 339 [2023-11-29 02:20:58,557 INFO L226 Difference]: Without dead ends: 227 [2023-11-29 02:20:58,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-11-29 02:20:58,559 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 158 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:20:58,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 511 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 02:20:58,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2023-11-29 02:20:58,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 216. [2023-11-29 02:20:58,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 137 states have (on average 1.1313868613138687) internal successors, (155), 138 states have internal predecessors, (155), 49 states have call successors, (49), 28 states have call predecessors, (49), 29 states have return successors, (49), 49 states have call predecessors, (49), 48 states have call successors, (49) [2023-11-29 02:20:58,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 253 transitions. [2023-11-29 02:20:58,576 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 253 transitions. Word has length 182 [2023-11-29 02:20:58,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:20:58,576 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 253 transitions. [2023-11-29 02:20:58,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 6.7) internal successors, (67), 7 states have internal predecessors, (67), 5 states have call successors, (31), 6 states have call predecessors, (31), 2 states have return successors, (28), 4 states have call predecessors, (28), 5 states have call successors, (28) [2023-11-29 02:20:58,576 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 253 transitions. [2023-11-29 02:20:58,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2023-11-29 02:20:58,578 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:20:58,578 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:20:58,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-29 02:20:58,578 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:20:58,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:20:58,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1570867391, now seen corresponding path program 1 times [2023-11-29 02:20:58,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:20:58,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575709346] [2023-11-29 02:20:58,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:20:58,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:20:58,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:59,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:20:59,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:59,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 02:20:59,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:59,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 02:20:59,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:59,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 02:20:59,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:59,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-29 02:20:59,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:59,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:20:59,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:59,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:20:59,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:59,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 02:20:59,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:59,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 02:20:59,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:59,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-29 02:20:59,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:59,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:20:59,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:59,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-11-29 02:20:59,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:59,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-29 02:20:59,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:59,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 02:20:59,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:59,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2023-11-29 02:20:59,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:59,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-11-29 02:20:59,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:59,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2023-11-29 02:20:59,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:59,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2023-11-29 02:20:59,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:59,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2023-11-29 02:20:59,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:59,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2023-11-29 02:20:59,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:59,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2023-11-29 02:20:59,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:59,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2023-11-29 02:20:59,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:59,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2023-11-29 02:20:59,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:59,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2023-11-29 02:20:59,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:59,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-29 02:20:59,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:59,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 02:20:59,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:59,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2023-11-29 02:20:59,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:59,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2023-11-29 02:20:59,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:59,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-29 02:20:59,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:59,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 02:20:59,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:59,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2023-11-29 02:20:59,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:59,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2023-11-29 02:20:59,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:59,889 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2023-11-29 02:20:59,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:20:59,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575709346] [2023-11-29 02:20:59,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575709346] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:20:59,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:20:59,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-29 02:20:59,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461560059] [2023-11-29 02:20:59,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:20:59,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 02:20:59,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:20:59,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 02:20:59,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-11-29 02:20:59,892 INFO L87 Difference]: Start difference. First operand 216 states and 253 transitions. Second operand has 12 states, 10 states have (on average 6.2) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (31), 8 states have call predecessors, (31), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-11-29 02:21:01,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:21:01,954 INFO L93 Difference]: Finished difference Result 231 states and 270 transitions. [2023-11-29 02:21:01,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 02:21:01,955 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 6.2) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (31), 8 states have call predecessors, (31), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 194 [2023-11-29 02:21:01,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:21:01,956 INFO L225 Difference]: With dead ends: 231 [2023-11-29 02:21:01,956 INFO L226 Difference]: Without dead ends: 229 [2023-11-29 02:21:01,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2023-11-29 02:21:01,957 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 89 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 1000 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 884 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-29 02:21:01,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 884 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1000 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-29 02:21:01,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2023-11-29 02:21:01,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 220. [2023-11-29 02:21:01,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 140 states have (on average 1.1285714285714286) internal successors, (158), 141 states have internal predecessors, (158), 49 states have call successors, (49), 29 states have call predecessors, (49), 30 states have return successors, (49), 49 states have call predecessors, (49), 48 states have call successors, (49) [2023-11-29 02:21:01,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 256 transitions. [2023-11-29 02:21:01,973 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 256 transitions. Word has length 194 [2023-11-29 02:21:01,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:21:01,974 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 256 transitions. [2023-11-29 02:21:01,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 6.2) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (31), 8 states have call predecessors, (31), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-11-29 02:21:01,974 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 256 transitions. [2023-11-29 02:21:01,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2023-11-29 02:21:01,975 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:21:01,975 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:21:01,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-29 02:21:01,976 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:21:01,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:21:01,976 INFO L85 PathProgramCache]: Analyzing trace with hash 512482048, now seen corresponding path program 1 times [2023-11-29 02:21:01,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:21:01,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073805528] [2023-11-29 02:21:01,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:21:01,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:21:02,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:02,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:21:02,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:02,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 02:21:02,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:02,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 02:21:02,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:02,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 02:21:02,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:02,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-29 02:21:02,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:02,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:21:02,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:02,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:21:02,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:02,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 02:21:02,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:02,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 02:21:02,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:03,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-29 02:21:03,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:03,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:21:03,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:03,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-11-29 02:21:03,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:03,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-29 02:21:03,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:03,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 02:21:03,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:03,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2023-11-29 02:21:03,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:03,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-11-29 02:21:03,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:03,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2023-11-29 02:21:03,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:03,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2023-11-29 02:21:03,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:03,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2023-11-29 02:21:03,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:03,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2023-11-29 02:21:03,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:03,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2023-11-29 02:21:03,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:03,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2023-11-29 02:21:03,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:03,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2023-11-29 02:21:03,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:03,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2023-11-29 02:21:03,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:03,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-29 02:21:03,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:03,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 02:21:03,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:03,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2023-11-29 02:21:03,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:03,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2023-11-29 02:21:03,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:03,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-29 02:21:03,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:03,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 02:21:03,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:03,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2023-11-29 02:21:03,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:03,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2023-11-29 02:21:03,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:03,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2023-11-29 02:21:03,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:03,230 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 8 proven. 27 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2023-11-29 02:21:03,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:21:03,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073805528] [2023-11-29 02:21:03,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073805528] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:21:03,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685989888] [2023-11-29 02:21:03,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:21:03,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:21:03,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:21:03,231 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:21:03,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 02:21:03,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:03,958 INFO L262 TraceCheckSpWp]: Trace formula consists of 2618 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-29 02:21:03,965 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:21:04,044 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2023-11-29 02:21:04,044 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:21:04,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685989888] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:21:04,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:21:04,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 13 [2023-11-29 02:21:04,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479016576] [2023-11-29 02:21:04,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:21:04,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 02:21:04,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:21:04,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 02:21:04,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-11-29 02:21:04,046 INFO L87 Difference]: Start difference. First operand 220 states and 256 transitions. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 4 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) [2023-11-29 02:21:04,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:21:04,652 INFO L93 Difference]: Finished difference Result 394 states and 457 transitions. [2023-11-29 02:21:04,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 02:21:04,653 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 4 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) Word has length 200 [2023-11-29 02:21:04,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:21:04,654 INFO L225 Difference]: With dead ends: 394 [2023-11-29 02:21:04,654 INFO L226 Difference]: Without dead ends: 220 [2023-11-29 02:21:04,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2023-11-29 02:21:04,656 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 47 mSDsluCounter, 719 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 02:21:04,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 886 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 02:21:04,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2023-11-29 02:21:04,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 216. [2023-11-29 02:21:04,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 137 states have (on average 1.1167883211678833) internal successors, (153), 138 states have internal predecessors, (153), 49 states have call successors, (49), 29 states have call predecessors, (49), 29 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2023-11-29 02:21:04,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 250 transitions. [2023-11-29 02:21:04,674 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 250 transitions. Word has length 200 [2023-11-29 02:21:04,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:21:04,674 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 250 transitions. [2023-11-29 02:21:04,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 4 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) [2023-11-29 02:21:04,674 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 250 transitions. [2023-11-29 02:21:04,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2023-11-29 02:21:04,675 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:21:04,675 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:21:04,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-29 02:21:04,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 02:21:04,876 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:21:04,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:21:04,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1980346412, now seen corresponding path program 1 times [2023-11-29 02:21:04,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:21:04,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846870850] [2023-11-29 02:21:04,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:21:04,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:21:04,949 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:21:04,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2002923397] [2023-11-29 02:21:04,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:21:04,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:21:04,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:21:04,951 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:21:04,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 02:21:05,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:05,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 2726 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-29 02:21:05,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:21:06,098 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 102 proven. 24 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2023-11-29 02:21:06,098 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:21:07,091 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 55 proven. 3 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2023-11-29 02:21:07,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:21:07,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846870850] [2023-11-29 02:21:07,092 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:21:07,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002923397] [2023-11-29 02:21:07,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002923397] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:21:07,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:21:07,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 29 [2023-11-29 02:21:07,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610474732] [2023-11-29 02:21:07,093 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:21:07,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 02:21:07,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:21:07,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 02:21:07,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=744, Unknown=0, NotChecked=0, Total=812 [2023-11-29 02:21:07,096 INFO L87 Difference]: Start difference. First operand 216 states and 250 transitions. Second operand has 29 states, 22 states have (on average 4.681818181818182) internal successors, (103), 21 states have internal predecessors, (103), 7 states have call successors, (40), 3 states have call predecessors, (40), 10 states have return successors, (41), 10 states have call predecessors, (41), 7 states have call successors, (41) [2023-11-29 02:21:10,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:21:10,588 INFO L93 Difference]: Finished difference Result 330 states and 383 transitions. [2023-11-29 02:21:10,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 02:21:10,589 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 22 states have (on average 4.681818181818182) internal successors, (103), 21 states have internal predecessors, (103), 7 states have call successors, (40), 3 states have call predecessors, (40), 10 states have return successors, (41), 10 states have call predecessors, (41), 7 states have call successors, (41) Word has length 206 [2023-11-29 02:21:10,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:21:10,591 INFO L225 Difference]: With dead ends: 330 [2023-11-29 02:21:10,591 INFO L226 Difference]: Without dead ends: 226 [2023-11-29 02:21:10,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 382 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=104, Invalid=1086, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 02:21:10,593 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 15 mSDsluCounter, 3467 mSDsCounter, 0 mSdLazyCounter, 1105 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 3637 SdHoareTripleChecker+Invalid, 1107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:21:10,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 3637 Invalid, 1107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1105 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-11-29 02:21:10,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2023-11-29 02:21:10,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 224. [2023-11-29 02:21:10,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 142 states have (on average 1.1126760563380282) internal successors, (158), 144 states have internal predecessors, (158), 49 states have call successors, (49), 29 states have call predecessors, (49), 32 states have return successors, (52), 50 states have call predecessors, (52), 48 states have call successors, (52) [2023-11-29 02:21:10,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 259 transitions. [2023-11-29 02:21:10,621 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 259 transitions. Word has length 206 [2023-11-29 02:21:10,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:21:10,622 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 259 transitions. [2023-11-29 02:21:10,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 22 states have (on average 4.681818181818182) internal successors, (103), 21 states have internal predecessors, (103), 7 states have call successors, (40), 3 states have call predecessors, (40), 10 states have return successors, (41), 10 states have call predecessors, (41), 7 states have call successors, (41) [2023-11-29 02:21:10,622 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 259 transitions. [2023-11-29 02:21:10,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2023-11-29 02:21:10,624 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:21:10,624 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:21:10,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 02:21:10,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 02:21:10,825 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:21:10,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:21:10,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1554474119, now seen corresponding path program 2 times [2023-11-29 02:21:10,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:21:10,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110246215] [2023-11-29 02:21:10,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:21:10,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:21:10,899 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:21:10,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [991239781] [2023-11-29 02:21:10,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:21:10,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:21:10,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:21:10,900 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:21:10,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 02:21:11,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:21:11,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:21:11,456 INFO L262 TraceCheckSpWp]: Trace formula consists of 2730 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-29 02:21:11,461 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:21:11,568 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 164 proven. 18 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2023-11-29 02:21:11,568 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:21:12,060 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 39 proven. 14 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2023-11-29 02:21:12,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:21:12,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110246215] [2023-11-29 02:21:12,061 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:21:12,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991239781] [2023-11-29 02:21:12,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991239781] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:21:12,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:21:12,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2023-11-29 02:21:12,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773606941] [2023-11-29 02:21:12,062 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:21:12,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 02:21:12,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:21:12,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 02:21:12,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2023-11-29 02:21:12,063 INFO L87 Difference]: Start difference. First operand 224 states and 259 transitions. Second operand has 25 states, 20 states have (on average 5.6) internal successors, (112), 18 states have internal predecessors, (112), 4 states have call successors, (41), 3 states have call predecessors, (41), 11 states have return successors, (44), 9 states have call predecessors, (44), 4 states have call successors, (44) [2023-11-29 02:21:13,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:21:13,698 INFO L93 Difference]: Finished difference Result 343 states and 397 transitions. [2023-11-29 02:21:13,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 02:21:13,698 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 20 states have (on average 5.6) internal successors, (112), 18 states have internal predecessors, (112), 4 states have call successors, (41), 3 states have call predecessors, (41), 11 states have return successors, (44), 9 states have call predecessors, (44), 4 states have call successors, (44) Word has length 208 [2023-11-29 02:21:13,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:21:13,700 INFO L225 Difference]: With dead ends: 343 [2023-11-29 02:21:13,700 INFO L226 Difference]: Without dead ends: 226 [2023-11-29 02:21:13,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 391 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2023-11-29 02:21:13,702 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 8 mSDsluCounter, 2815 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 2985 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-29 02:21:13,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 2985 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 854 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-29 02:21:13,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2023-11-29 02:21:13,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 224. [2023-11-29 02:21:13,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 142 states have (on average 1.1126760563380282) internal successors, (158), 144 states have internal predecessors, (158), 49 states have call successors, (49), 29 states have call predecessors, (49), 32 states have return successors, (51), 50 states have call predecessors, (51), 48 states have call successors, (51) [2023-11-29 02:21:13,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 258 transitions. [2023-11-29 02:21:13,729 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 258 transitions. Word has length 208 [2023-11-29 02:21:13,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:21:13,729 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 258 transitions. [2023-11-29 02:21:13,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 20 states have (on average 5.6) internal successors, (112), 18 states have internal predecessors, (112), 4 states have call successors, (41), 3 states have call predecessors, (41), 11 states have return successors, (44), 9 states have call predecessors, (44), 4 states have call successors, (44) [2023-11-29 02:21:13,730 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 258 transitions. [2023-11-29 02:21:13,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2023-11-29 02:21:13,732 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:21:13,732 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:21:13,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 02:21:13,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 02:21:13,935 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:21:13,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:21:13,935 INFO L85 PathProgramCache]: Analyzing trace with hash -720587316, now seen corresponding path program 1 times [2023-11-29 02:21:13,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:21:13,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568481535] [2023-11-29 02:21:13,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:21:13,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:21:14,002 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:21:14,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [663015152] [2023-11-29 02:21:14,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:21:14,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:21:14,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:21:14,003 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:21:14,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 02:21:20,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:20,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 2734 conjuncts, 189 conjunts are in the unsatisfiable core [2023-11-29 02:21:20,155 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:21:20,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:21:20,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 02:21:22,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:21:22,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:21:22,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:21:22,620 INFO L349 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2023-11-29 02:21:22,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 75 [2023-11-29 02:21:23,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:21:23,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:21:23,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:21:23,283 INFO L349 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2023-11-29 02:21:23,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 75 [2023-11-29 02:21:23,971 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:21:23,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 69 [2023-11-29 02:21:23,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:21:23,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2023-11-29 02:21:24,220 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 242 proven. 7 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2023-11-29 02:21:24,221 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:21:24,596 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2031 (Array Int Int))) (or (not (= (let ((.cse0 (+ 32 |c_ULTIMATE.start_aws_hash_table_clean_up_harness_#t~mem1535#1.offset|))) (store (select |c_#memory_int#6| |c_ULTIMATE.start_aws_hash_table_clean_up_harness_#t~mem1535#1.base|) .cse0 (select v_ArrVal_2031 .cse0))) v_ArrVal_2031)) (< (mod (select (select (store |c_#memory_int#6| |c_ULTIMATE.start_aws_hash_table_clean_up_harness_#t~mem1535#1.base| v_ArrVal_2031) (select (select |c_#memory_$Pointer$#5.base| |c_ULTIMATE.start_aws_hash_table_clean_up_harness_~#map~0#1.base|) |c_ULTIMATE.start_aws_hash_table_clean_up_harness_~#map~0#1.offset|)) (+ (select (select |c_#memory_$Pointer$#5.offset| |c_ULTIMATE.start_aws_hash_table_clean_up_harness_~#map~0#1.base|) |c_ULTIMATE.start_aws_hash_table_clean_up_harness_~#map~0#1.offset|) 48)) 18446744073709551616) 1))) is different from false [2023-11-29 02:21:24,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:21:24,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568481535] [2023-11-29 02:21:24,606 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:21:24,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663015152] [2023-11-29 02:21:24,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663015152] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:21:24,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:21:24,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2023-11-29 02:21:24,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952502459] [2023-11-29 02:21:24,607 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 02:21:24,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-29 02:21:24,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:21:24,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-29 02:21:24,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1417, Unknown=1, NotChecked=76, Total=1640 [2023-11-29 02:21:24,608 INFO L87 Difference]: Start difference. First operand 224 states and 258 transitions. Second operand has 35 states, 28 states have (on average 3.607142857142857) internal successors, (101), 28 states have internal predecessors, (101), 12 states have call successors, (35), 5 states have call predecessors, (35), 11 states have return successors, (32), 12 states have call predecessors, (32), 12 states have call successors, (32) [2023-11-29 02:21:37,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:21:37,119 INFO L93 Difference]: Finished difference Result 403 states and 460 transitions. [2023-11-29 02:21:37,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-29 02:21:37,119 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 28 states have (on average 3.607142857142857) internal successors, (101), 28 states have internal predecessors, (101), 12 states have call successors, (35), 5 states have call predecessors, (35), 11 states have return successors, (32), 12 states have call predecessors, (32), 12 states have call successors, (32) Word has length 210 [2023-11-29 02:21:37,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:21:37,121 INFO L225 Difference]: With dead ends: 403 [2023-11-29 02:21:37,121 INFO L226 Difference]: Without dead ends: 241 [2023-11-29 02:21:37,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 274 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=275, Invalid=2808, Unknown=1, NotChecked=108, Total=3192 [2023-11-29 02:21:37,124 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 110 mSDsluCounter, 2689 mSDsCounter, 0 mSdLazyCounter, 2905 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 2831 SdHoareTripleChecker+Invalid, 2939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 2905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2023-11-29 02:21:37,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 2831 Invalid, 2939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 2905 Invalid, 0 Unknown, 0 Unchecked, 11.5s Time] [2023-11-29 02:21:37,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2023-11-29 02:21:37,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 230. [2023-11-29 02:21:37,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 146 states have (on average 1.1027397260273972) internal successors, (161), 148 states have internal predecessors, (161), 49 states have call successors, (49), 31 states have call predecessors, (49), 34 states have return successors, (51), 50 states have call predecessors, (51), 48 states have call successors, (51) [2023-11-29 02:21:37,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 261 transitions. [2023-11-29 02:21:37,154 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 261 transitions. Word has length 210 [2023-11-29 02:21:37,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:21:37,154 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 261 transitions. [2023-11-29 02:21:37,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 28 states have (on average 3.607142857142857) internal successors, (101), 28 states have internal predecessors, (101), 12 states have call successors, (35), 5 states have call predecessors, (35), 11 states have return successors, (32), 12 states have call predecessors, (32), 12 states have call successors, (32) [2023-11-29 02:21:37,155 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 261 transitions. [2023-11-29 02:21:37,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2023-11-29 02:21:37,157 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:21:37,157 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:21:37,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 02:21:37,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 02:21:37,358 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:21:37,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:21:37,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1656470304, now seen corresponding path program 1 times [2023-11-29 02:21:37,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:21:37,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102158871] [2023-11-29 02:21:37,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:21:37,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:21:37,433 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:21:37,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [578653937] [2023-11-29 02:21:37,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:21:37,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:21:37,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:21:37,435 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:21:37,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 02:21:38,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:38,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 2736 conjuncts, 62 conjunts are in the unsatisfiable core [2023-11-29 02:21:38,112 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:21:38,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:21:38,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2023-11-29 02:21:38,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 02:21:39,034 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 183 proven. 5 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2023-11-29 02:21:39,034 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:21:39,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:21:39,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102158871] [2023-11-29 02:21:39,582 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:21:39,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578653937] [2023-11-29 02:21:39,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578653937] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:21:39,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:21:39,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-11-29 02:21:39,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811359778] [2023-11-29 02:21:39,582 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 02:21:39,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 02:21:39,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:21:39,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 02:21:39,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2023-11-29 02:21:39,585 INFO L87 Difference]: Start difference. First operand 230 states and 261 transitions. Second operand has 19 states, 15 states have (on average 6.2) internal successors, (93), 17 states have internal predecessors, (93), 7 states have call successors, (35), 3 states have call predecessors, (35), 7 states have return successors, (32), 7 states have call predecessors, (32), 7 states have call successors, (32) [2023-11-29 02:21:41,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:21:41,543 INFO L93 Difference]: Finished difference Result 415 states and 474 transitions. [2023-11-29 02:21:41,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 02:21:41,543 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 6.2) internal successors, (93), 17 states have internal predecessors, (93), 7 states have call successors, (35), 3 states have call predecessors, (35), 7 states have return successors, (32), 7 states have call predecessors, (32), 7 states have call successors, (32) Word has length 211 [2023-11-29 02:21:41,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:21:41,545 INFO L225 Difference]: With dead ends: 415 [2023-11-29 02:21:41,545 INFO L226 Difference]: Without dead ends: 233 [2023-11-29 02:21:41,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=157, Invalid=1175, Unknown=0, NotChecked=0, Total=1332 [2023-11-29 02:21:41,547 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 26 mSDsluCounter, 1255 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 1436 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:21:41,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 1436 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-29 02:21:41,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2023-11-29 02:21:41,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 230. [2023-11-29 02:21:41,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 146 states have (on average 1.095890410958904) internal successors, (160), 148 states have internal predecessors, (160), 49 states have call successors, (49), 31 states have call predecessors, (49), 34 states have return successors, (51), 50 states have call predecessors, (51), 48 states have call successors, (51) [2023-11-29 02:21:41,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 260 transitions. [2023-11-29 02:21:41,565 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 260 transitions. Word has length 211 [2023-11-29 02:21:41,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:21:41,566 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 260 transitions. [2023-11-29 02:21:41,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 6.2) internal successors, (93), 17 states have internal predecessors, (93), 7 states have call successors, (35), 3 states have call predecessors, (35), 7 states have return successors, (32), 7 states have call predecessors, (32), 7 states have call successors, (32) [2023-11-29 02:21:41,566 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 260 transitions. [2023-11-29 02:21:41,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2023-11-29 02:21:41,567 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:21:41,567 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:21:41,578 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 02:21:41,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:21:41,768 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:21:41,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:21:41,768 INFO L85 PathProgramCache]: Analyzing trace with hash 264788052, now seen corresponding path program 2 times [2023-11-29 02:21:41,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:21:41,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182478482] [2023-11-29 02:21:41,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:21:41,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:21:41,820 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:21:41,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1110751847] [2023-11-29 02:21:41,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:21:41,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:21:41,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:21:41,821 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:21:41,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 02:21:42,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:21:42,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:21:42,525 INFO L262 TraceCheckSpWp]: Trace formula consists of 2738 conjuncts, 139 conjunts are in the unsatisfiable core [2023-11-29 02:21:42,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:21:42,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2023-11-29 02:21:42,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 02:21:42,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:21:43,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:21:43,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 20 [2023-11-29 02:21:43,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:21:43,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 20 [2023-11-29 02:21:43,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:21:43,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 20 [2023-11-29 02:21:45,748 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 260 proven. 9 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-11-29 02:21:45,748 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:21:46,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:21:46,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182478482] [2023-11-29 02:21:46,399 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:21:46,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110751847] [2023-11-29 02:21:46,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110751847] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:21:46,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:21:46,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2023-11-29 02:21:46,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128853704] [2023-11-29 02:21:46,399 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 02:21:46,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-29 02:21:46,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:21:46,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-29 02:21:46,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1060, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 02:21:46,402 INFO L87 Difference]: Start difference. First operand 230 states and 260 transitions. Second operand has 30 states, 24 states have (on average 4.666666666666667) internal successors, (112), 28 states have internal predecessors, (112), 13 states have call successors, (37), 4 states have call predecessors, (37), 10 states have return successors, (34), 13 states have call predecessors, (34), 13 states have call successors, (34) [2023-11-29 02:21:57,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:21:57,233 INFO L93 Difference]: Finished difference Result 369 states and 427 transitions. [2023-11-29 02:21:57,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-29 02:21:57,234 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 24 states have (on average 4.666666666666667) internal successors, (112), 28 states have internal predecessors, (112), 13 states have call successors, (37), 4 states have call predecessors, (37), 10 states have return successors, (34), 13 states have call predecessors, (34), 13 states have call successors, (34) Word has length 212 [2023-11-29 02:21:57,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:21:57,235 INFO L225 Difference]: With dead ends: 369 [2023-11-29 02:21:57,236 INFO L226 Difference]: Without dead ends: 252 [2023-11-29 02:21:57,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 227 SyntacticMatches, 18 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=390, Invalid=3642, Unknown=0, NotChecked=0, Total=4032 [2023-11-29 02:21:57,238 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 206 mSDsluCounter, 1812 mSDsCounter, 0 mSdLazyCounter, 2273 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 1966 SdHoareTripleChecker+Invalid, 2365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 2273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:21:57,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 1966 Invalid, 2365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 2273 Invalid, 0 Unknown, 0 Unchecked, 9.3s Time] [2023-11-29 02:21:57,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2023-11-29 02:21:57,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 250. [2023-11-29 02:21:57,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 161 states have (on average 1.093167701863354) internal successors, (176), 163 states have internal predecessors, (176), 51 states have call successors, (51), 34 states have call predecessors, (51), 37 states have return successors, (57), 52 states have call predecessors, (57), 50 states have call successors, (57) [2023-11-29 02:21:57,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 284 transitions. [2023-11-29 02:21:57,265 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 284 transitions. Word has length 212 [2023-11-29 02:21:57,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:21:57,265 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 284 transitions. [2023-11-29 02:21:57,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 24 states have (on average 4.666666666666667) internal successors, (112), 28 states have internal predecessors, (112), 13 states have call successors, (37), 4 states have call predecessors, (37), 10 states have return successors, (34), 13 states have call predecessors, (34), 13 states have call successors, (34) [2023-11-29 02:21:57,266 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 284 transitions. [2023-11-29 02:21:57,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2023-11-29 02:21:57,267 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:21:57,267 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:21:57,278 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 02:21:57,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:21:57,467 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:21:57,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:21:57,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1962909528, now seen corresponding path program 3 times [2023-11-29 02:21:57,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:21:57,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48324913] [2023-11-29 02:21:57,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:21:57,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:21:57,528 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:21:57,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1581630080] [2023-11-29 02:21:57,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:21:57,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:21:57,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:21:57,529 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:21:57,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 02:21:58,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 02:21:58,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:21:58,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 1853 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-29 02:21:58,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:21:58,609 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2023-11-29 02:21:58,609 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:21:58,957 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2023-11-29 02:21:58,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:21:58,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48324913] [2023-11-29 02:21:58,957 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:21:58,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581630080] [2023-11-29 02:21:58,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581630080] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:21:58,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:21:58,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2023-11-29 02:21:58,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197516585] [2023-11-29 02:21:58,958 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:21:58,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 02:21:58,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:21:58,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 02:21:58,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2023-11-29 02:21:58,960 INFO L87 Difference]: Start difference. First operand 250 states and 284 transitions. Second operand has 21 states, 15 states have (on average 5.266666666666667) internal successors, (79), 14 states have internal predecessors, (79), 7 states have call successors, (38), 7 states have call predecessors, (38), 3 states have return successors, (32), 5 states have call predecessors, (32), 3 states have call successors, (32) [2023-11-29 02:22:01,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:22:01,037 INFO L93 Difference]: Finished difference Result 256 states and 289 transitions. [2023-11-29 02:22:01,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 02:22:01,038 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 15 states have (on average 5.266666666666667) internal successors, (79), 14 states have internal predecessors, (79), 7 states have call successors, (38), 7 states have call predecessors, (38), 3 states have return successors, (32), 5 states have call predecessors, (32), 3 states have call successors, (32) Word has length 213 [2023-11-29 02:22:01,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:22:01,040 INFO L225 Difference]: With dead ends: 256 [2023-11-29 02:22:01,040 INFO L226 Difference]: Without dead ends: 254 [2023-11-29 02:22:01,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 404 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2023-11-29 02:22:01,041 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 38 mSDsluCounter, 2194 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 2366 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:22:01,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 2366 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-29 02:22:01,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2023-11-29 02:22:01,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2023-11-29 02:22:01,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 164 states have (on average 1.0914634146341464) internal successors, (179), 166 states have internal predecessors, (179), 51 states have call successors, (51), 35 states have call predecessors, (51), 38 states have return successors, (57), 52 states have call predecessors, (57), 50 states have call successors, (57) [2023-11-29 02:22:01,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 287 transitions. [2023-11-29 02:22:01,069 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 287 transitions. Word has length 213 [2023-11-29 02:22:01,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:22:01,070 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 287 transitions. [2023-11-29 02:22:01,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 15 states have (on average 5.266666666666667) internal successors, (79), 14 states have internal predecessors, (79), 7 states have call successors, (38), 7 states have call predecessors, (38), 3 states have return successors, (32), 5 states have call predecessors, (32), 3 states have call successors, (32) [2023-11-29 02:22:01,070 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 287 transitions. [2023-11-29 02:22:01,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2023-11-29 02:22:01,071 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:22:01,071 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:22:01,081 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 02:22:01,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-29 02:22:01,272 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:22:01,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:22:01,273 INFO L85 PathProgramCache]: Analyzing trace with hash -486792848, now seen corresponding path program 1 times [2023-11-29 02:22:01,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:22:01,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914771987] [2023-11-29 02:22:01,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:22:01,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:22:01,341 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:22:01,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2136952461] [2023-11-29 02:22:01,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:22:01,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:22:01,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:22:01,342 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:22:01,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 02:22:02,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:22:02,053 INFO L262 TraceCheckSpWp]: Trace formula consists of 2872 conjuncts, 105 conjunts are in the unsatisfiable core [2023-11-29 02:22:02,060 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:22:02,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 02:22:02,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:22:02,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 02:22:04,200 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 336 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-29 02:22:04,201 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:22:04,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:22:04,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914771987] [2023-11-29 02:22:04,781 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:22:04,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136952461] [2023-11-29 02:22:04,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136952461] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:22:04,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:22:04,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2023-11-29 02:22:04,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090255832] [2023-11-29 02:22:04,782 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 02:22:04,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 02:22:04,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:22:04,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 02:22:04,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1003, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 02:22:04,784 INFO L87 Difference]: Start difference. First operand 254 states and 287 transitions. Second operand has 29 states, 23 states have (on average 5.956521739130435) internal successors, (137), 28 states have internal predecessors, (137), 13 states have call successors, (41), 4 states have call predecessors, (41), 11 states have return successors, (40), 13 states have call predecessors, (40), 13 states have call successors, (40) [2023-11-29 02:22:11,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:22:11,437 INFO L93 Difference]: Finished difference Result 408 states and 459 transitions. [2023-11-29 02:22:11,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-29 02:22:11,438 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 23 states have (on average 5.956521739130435) internal successors, (137), 28 states have internal predecessors, (137), 13 states have call successors, (41), 4 states have call predecessors, (41), 11 states have return successors, (40), 13 states have call predecessors, (40), 13 states have call successors, (40) Word has length 247 [2023-11-29 02:22:11,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:22:11,440 INFO L225 Difference]: With dead ends: 408 [2023-11-29 02:22:11,440 INFO L226 Difference]: Without dead ends: 281 [2023-11-29 02:22:11,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 264 SyntacticMatches, 22 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1058 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=402, Invalid=3888, Unknown=0, NotChecked=0, Total=4290 [2023-11-29 02:22:11,443 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 240 mSDsluCounter, 1280 mSDsCounter, 0 mSdLazyCounter, 2285 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 1436 SdHoareTripleChecker+Invalid, 2387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 2285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:22:11,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 1436 Invalid, 2387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 2285 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2023-11-29 02:22:11,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2023-11-29 02:22:11,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 271. [2023-11-29 02:22:11,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 178 states have (on average 1.0842696629213484) internal successors, (193), 179 states have internal predecessors, (193), 53 states have call successors, (53), 39 states have call predecessors, (53), 39 states have return successors, (55), 52 states have call predecessors, (55), 52 states have call successors, (55) [2023-11-29 02:22:11,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 301 transitions. [2023-11-29 02:22:11,490 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 301 transitions. Word has length 247 [2023-11-29 02:22:11,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:22:11,490 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 301 transitions. [2023-11-29 02:22:11,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 23 states have (on average 5.956521739130435) internal successors, (137), 28 states have internal predecessors, (137), 13 states have call successors, (41), 4 states have call predecessors, (41), 11 states have return successors, (40), 13 states have call predecessors, (40), 13 states have call successors, (40) [2023-11-29 02:22:11,491 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 301 transitions. [2023-11-29 02:22:11,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2023-11-29 02:22:11,492 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:22:11,492 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:22:11,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-29 02:22:11,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:22:11,692 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:22:11,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:22:11,693 INFO L85 PathProgramCache]: Analyzing trace with hash -583209813, now seen corresponding path program 1 times [2023-11-29 02:22:11,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:22:11,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091513564] [2023-11-29 02:22:11,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:22:11,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:22:11,762 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:22:11,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1304115098] [2023-11-29 02:22:11,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:22:11,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:22:11,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:22:11,764 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:22:11,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 02:22:12,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:22:12,540 INFO L262 TraceCheckSpWp]: Trace formula consists of 2868 conjuncts, 151 conjunts are in the unsatisfiable core [2023-11-29 02:22:12,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:22:12,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:22:12,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 02:22:12,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2023-11-29 02:22:13,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:22:13,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 18 [2023-11-29 02:22:13,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 18 [2023-11-29 02:22:13,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:22:13,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 18 [2023-11-29 02:22:14,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 6 [2023-11-29 02:22:14,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 29 [2023-11-29 02:22:15,758 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 193 proven. 57 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2023-11-29 02:22:15,759 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:22:16,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:22:16,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091513564] [2023-11-29 02:22:16,264 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:22:16,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304115098] [2023-11-29 02:22:16,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304115098] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:22:16,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:22:16,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2023-11-29 02:22:16,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262255014] [2023-11-29 02:22:16,265 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 02:22:16,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-29 02:22:16,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:22:16,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-29 02:22:16,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1116, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 02:22:16,267 INFO L87 Difference]: Start difference. First operand 271 states and 301 transitions. Second operand has 31 states, 25 states have (on average 4.24) internal successors, (106), 29 states have internal predecessors, (106), 18 states have call successors, (39), 6 states have call predecessors, (39), 9 states have return successors, (38), 16 states have call predecessors, (38), 17 states have call successors, (38) [2023-11-29 02:22:24,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:22:24,807 INFO L93 Difference]: Finished difference Result 397 states and 431 transitions. [2023-11-29 02:22:24,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-29 02:22:24,808 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 25 states have (on average 4.24) internal successors, (106), 29 states have internal predecessors, (106), 18 states have call successors, (39), 6 states have call predecessors, (39), 9 states have return successors, (38), 16 states have call predecessors, (38), 17 states have call successors, (38) Word has length 245 [2023-11-29 02:22:24,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:22:24,810 INFO L225 Difference]: With dead ends: 397 [2023-11-29 02:22:24,810 INFO L226 Difference]: Without dead ends: 344 [2023-11-29 02:22:24,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 197 SyntacticMatches, 28 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=446, Invalid=3460, Unknown=0, NotChecked=0, Total=3906 [2023-11-29 02:22:24,812 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 246 mSDsluCounter, 1044 mSDsCounter, 0 mSdLazyCounter, 4185 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 1158 SdHoareTripleChecker+Invalid, 4286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 4185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:22:24,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 1158 Invalid, 4286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 4185 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2023-11-29 02:22:24,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2023-11-29 02:22:24,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 304. [2023-11-29 02:22:24,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 202 states have (on average 1.0792079207920793) internal successors, (218), 204 states have internal predecessors, (218), 56 states have call successors, (56), 43 states have call predecessors, (56), 45 states have return successors, (57), 56 states have call predecessors, (57), 55 states have call successors, (57) [2023-11-29 02:22:24,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 331 transitions. [2023-11-29 02:22:24,873 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 331 transitions. Word has length 245 [2023-11-29 02:22:24,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:22:24,874 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 331 transitions. [2023-11-29 02:22:24,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 25 states have (on average 4.24) internal successors, (106), 29 states have internal predecessors, (106), 18 states have call successors, (39), 6 states have call predecessors, (39), 9 states have return successors, (38), 16 states have call predecessors, (38), 17 states have call successors, (38) [2023-11-29 02:22:24,874 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 331 transitions. [2023-11-29 02:22:24,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2023-11-29 02:22:24,875 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:22:24,875 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:22:24,886 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 02:22:25,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:22:25,076 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:22:25,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:22:25,076 INFO L85 PathProgramCache]: Analyzing trace with hash 818120809, now seen corresponding path program 1 times [2023-11-29 02:22:25,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:22:25,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668154065] [2023-11-29 02:22:25,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:22:25,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:22:25,135 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:22:25,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [708911206] [2023-11-29 02:22:25,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:22:25,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:22:25,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:22:25,136 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:22:25,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 02:22:25,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:22:25,832 INFO L262 TraceCheckSpWp]: Trace formula consists of 2887 conjuncts, 190 conjunts are in the unsatisfiable core [2023-11-29 02:22:25,840 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:22:25,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:22:25,978 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2023-11-29 02:22:25,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 02:22:26,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:22:26,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 18 [2023-11-29 02:22:26,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:22:26,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 18 [2023-11-29 02:22:26,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:22:26,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 18 [2023-11-29 02:22:27,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 6 [2023-11-29 02:22:28,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2023-11-29 02:22:28,396 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:22:28,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 43 [2023-11-29 02:22:29,682 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 193 proven. 58 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2023-11-29 02:22:29,682 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:22:30,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:22:30,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668154065] [2023-11-29 02:22:30,273 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:22:30,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708911206] [2023-11-29 02:22:30,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708911206] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:22:30,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:22:30,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2023-11-29 02:22:30,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973227038] [2023-11-29 02:22:30,273 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 02:22:30,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-29 02:22:30,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:22:30,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-29 02:22:30,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1553, Unknown=0, NotChecked=0, Total=1722 [2023-11-29 02:22:30,276 INFO L87 Difference]: Start difference. First operand 304 states and 331 transitions. Second operand has 37 states, 30 states have (on average 3.566666666666667) internal successors, (107), 33 states have internal predecessors, (107), 19 states have call successors, (39), 6 states have call predecessors, (39), 10 states have return successors, (38), 17 states have call predecessors, (38), 18 states have call successors, (38) [2023-11-29 02:22:41,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:22:41,645 INFO L93 Difference]: Finished difference Result 433 states and 471 transitions. [2023-11-29 02:22:41,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-29 02:22:41,646 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 30 states have (on average 3.566666666666667) internal successors, (107), 33 states have internal predecessors, (107), 19 states have call successors, (39), 6 states have call predecessors, (39), 10 states have return successors, (38), 17 states have call predecessors, (38), 18 states have call successors, (38) Word has length 246 [2023-11-29 02:22:41,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:22:41,648 INFO L225 Difference]: With dead ends: 433 [2023-11-29 02:22:41,649 INFO L226 Difference]: Without dead ends: 382 [2023-11-29 02:22:41,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 193 SyntacticMatches, 27 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1523 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=509, Invalid=4747, Unknown=0, NotChecked=0, Total=5256 [2023-11-29 02:22:41,651 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 258 mSDsluCounter, 986 mSDsCounter, 0 mSdLazyCounter, 5092 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 1102 SdHoareTripleChecker+Invalid, 5205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 5092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:22:41,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 1102 Invalid, 5205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 5092 Invalid, 0 Unknown, 0 Unchecked, 9.4s Time] [2023-11-29 02:22:41,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2023-11-29 02:22:41,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 305. [2023-11-29 02:22:41,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 203 states have (on average 1.083743842364532) internal successors, (220), 205 states have internal predecessors, (220), 56 states have call successors, (56), 43 states have call predecessors, (56), 45 states have return successors, (57), 56 states have call predecessors, (57), 55 states have call successors, (57) [2023-11-29 02:22:41,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 333 transitions. [2023-11-29 02:22:41,713 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 333 transitions. Word has length 246 [2023-11-29 02:22:41,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:22:41,713 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 333 transitions. [2023-11-29 02:22:41,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 30 states have (on average 3.566666666666667) internal successors, (107), 33 states have internal predecessors, (107), 19 states have call successors, (39), 6 states have call predecessors, (39), 10 states have return successors, (38), 17 states have call predecessors, (38), 18 states have call successors, (38) [2023-11-29 02:22:41,714 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 333 transitions. [2023-11-29 02:22:41,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2023-11-29 02:22:41,716 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:22:41,716 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:22:41,731 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 02:22:41,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 02:22:41,917 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:22:41,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:22:41,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1309697131, now seen corresponding path program 2 times [2023-11-29 02:22:41,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:22:41,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910762218] [2023-11-29 02:22:41,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:22:41,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:22:41,977 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:22:41,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [902319123] [2023-11-29 02:22:41,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:22:41,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:22:41,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:22:41,978 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:22:41,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 02:22:42,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:22:42,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:22:42,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 2906 conjuncts, 143 conjunts are in the unsatisfiable core [2023-11-29 02:22:42,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:22:43,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 02:22:43,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:22:44,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 6 [2023-11-29 02:22:45,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2023-11-29 02:22:45,167 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:22:45,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 43 [2023-11-29 02:22:46,637 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 286 proven. 38 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-11-29 02:22:46,637 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:22:47,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:22:47,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910762218] [2023-11-29 02:22:47,184 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:22:47,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902319123] [2023-11-29 02:22:47,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902319123] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:22:47,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:22:47,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2023-11-29 02:22:47,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897808469] [2023-11-29 02:22:47,185 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 02:22:47,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-29 02:22:47,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:22:47,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-29 02:22:47,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1640, Unknown=0, NotChecked=0, Total=1806 [2023-11-29 02:22:47,187 INFO L87 Difference]: Start difference. First operand 305 states and 333 transitions. Second operand has 38 states, 31 states have (on average 4.354838709677419) internal successors, (135), 34 states have internal predecessors, (135), 17 states have call successors, (41), 6 states have call predecessors, (41), 12 states have return successors, (40), 17 states have call predecessors, (40), 16 states have call successors, (40) [2023-11-29 02:23:04,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:23:04,319 INFO L93 Difference]: Finished difference Result 464 states and 504 transitions. [2023-11-29 02:23:04,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-11-29 02:23:04,320 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 31 states have (on average 4.354838709677419) internal successors, (135), 34 states have internal predecessors, (135), 17 states have call successors, (41), 6 states have call predecessors, (41), 12 states have return successors, (40), 17 states have call predecessors, (40), 16 states have call successors, (40) Word has length 247 [2023-11-29 02:23:04,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:23:04,322 INFO L225 Difference]: With dead ends: 464 [2023-11-29 02:23:04,322 INFO L226 Difference]: Without dead ends: 413 [2023-11-29 02:23:04,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 195 SyntacticMatches, 28 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1693 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=593, Invalid=6213, Unknown=0, NotChecked=0, Total=6806 [2023-11-29 02:23:04,325 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 275 mSDsluCounter, 1293 mSDsCounter, 0 mSdLazyCounter, 4751 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 1403 SdHoareTripleChecker+Invalid, 4905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 4751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.5s IncrementalHoareTripleChecker+Time [2023-11-29 02:23:04,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 1403 Invalid, 4905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 4751 Invalid, 0 Unknown, 0 Unchecked, 14.5s Time] [2023-11-29 02:23:04,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2023-11-29 02:23:04,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 306. [2023-11-29 02:23:04,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 204 states have (on average 1.088235294117647) internal successors, (222), 206 states have internal predecessors, (222), 56 states have call successors, (56), 43 states have call predecessors, (56), 45 states have return successors, (57), 56 states have call predecessors, (57), 55 states have call successors, (57) [2023-11-29 02:23:04,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 335 transitions. [2023-11-29 02:23:04,396 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 335 transitions. Word has length 247 [2023-11-29 02:23:04,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:23:04,396 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 335 transitions. [2023-11-29 02:23:04,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 31 states have (on average 4.354838709677419) internal successors, (135), 34 states have internal predecessors, (135), 17 states have call successors, (41), 6 states have call predecessors, (41), 12 states have return successors, (40), 17 states have call predecessors, (40), 16 states have call successors, (40) [2023-11-29 02:23:04,397 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 335 transitions. [2023-11-29 02:23:04,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2023-11-29 02:23:04,398 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:23:04,398 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:23:04,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 02:23:04,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 02:23:04,599 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:23:04,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:23:04,599 INFO L85 PathProgramCache]: Analyzing trace with hash 363618054, now seen corresponding path program 2 times [2023-11-29 02:23:04,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:23:04,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456061727] [2023-11-29 02:23:04,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:23:04,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:23:04,662 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:23:04,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [449890305] [2023-11-29 02:23:04,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:23:04,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:23:04,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:23:04,663 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:23:04,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 02:23:05,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:23:05,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:23:05,414 INFO L262 TraceCheckSpWp]: Trace formula consists of 2872 conjuncts, 139 conjunts are in the unsatisfiable core [2023-11-29 02:23:05,421 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:23:05,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 02:23:05,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:23:07,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-11-29 02:23:07,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:23:07,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 33 [2023-11-29 02:23:08,863 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 300 proven. 29 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-11-29 02:23:08,863 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:23:09,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:23:09,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456061727] [2023-11-29 02:23:09,468 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:23:09,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449890305] [2023-11-29 02:23:09,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449890305] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:23:09,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:23:09,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2023-11-29 02:23:09,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899906579] [2023-11-29 02:23:09,469 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 02:23:09,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-29 02:23:09,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:23:09,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-29 02:23:09,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1470, Unknown=0, NotChecked=0, Total=1640 [2023-11-29 02:23:09,471 INFO L87 Difference]: Start difference. First operand 306 states and 335 transitions. Second operand has 36 states, 28 states have (on average 4.821428571428571) internal successors, (135), 34 states have internal predecessors, (135), 17 states have call successors, (41), 6 states have call predecessors, (41), 11 states have return successors, (40), 16 states have call predecessors, (40), 16 states have call successors, (40) [2023-11-29 02:23:28,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:23:28,018 INFO L93 Difference]: Finished difference Result 427 states and 462 transitions. [2023-11-29 02:23:28,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-11-29 02:23:28,019 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 28 states have (on average 4.821428571428571) internal successors, (135), 34 states have internal predecessors, (135), 17 states have call successors, (41), 6 states have call predecessors, (41), 11 states have return successors, (40), 16 states have call predecessors, (40), 16 states have call successors, (40) Word has length 247 [2023-11-29 02:23:28,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:23:28,020 INFO L225 Difference]: With dead ends: 427 [2023-11-29 02:23:28,021 INFO L226 Difference]: Without dead ends: 375 [2023-11-29 02:23:28,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 194 SyntacticMatches, 29 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1989 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=670, Invalid=6302, Unknown=0, NotChecked=0, Total=6972 [2023-11-29 02:23:28,023 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 232 mSDsluCounter, 1784 mSDsCounter, 0 mSdLazyCounter, 4544 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 1895 SdHoareTripleChecker+Invalid, 4681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 4544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.9s IncrementalHoareTripleChecker+Time [2023-11-29 02:23:28,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 1895 Invalid, 4681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 4544 Invalid, 0 Unknown, 0 Unchecked, 15.9s Time] [2023-11-29 02:23:28,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2023-11-29 02:23:28,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 333. [2023-11-29 02:23:28,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 223 states have (on average 1.0807174887892377) internal successors, (241), 226 states have internal predecessors, (241), 59 states have call successors, (59), 46 states have call predecessors, (59), 50 states have return successors, (62), 60 states have call predecessors, (62), 58 states have call successors, (62) [2023-11-29 02:23:28,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 362 transitions. [2023-11-29 02:23:28,109 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 362 transitions. Word has length 247 [2023-11-29 02:23:28,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:23:28,109 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 362 transitions. [2023-11-29 02:23:28,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 28 states have (on average 4.821428571428571) internal successors, (135), 34 states have internal predecessors, (135), 17 states have call successors, (41), 6 states have call predecessors, (41), 11 states have return successors, (40), 16 states have call predecessors, (40), 16 states have call successors, (40) [2023-11-29 02:23:28,109 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 362 transitions. [2023-11-29 02:23:28,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2023-11-29 02:23:28,110 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:23:28,111 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:23:28,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 02:23:28,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:23:28,312 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:23:28,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:23:28,312 INFO L85 PathProgramCache]: Analyzing trace with hash -631306071, now seen corresponding path program 3 times [2023-11-29 02:23:28,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:23:28,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419771065] [2023-11-29 02:23:28,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:23:28,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:23:28,372 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:23:28,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [581187422] [2023-11-29 02:23:28,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:23:28,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:23:28,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:23:28,373 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:23:28,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 02:23:30,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 02:23:30,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:23:30,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 2542 conjuncts, 129 conjunts are in the unsatisfiable core [2023-11-29 02:23:30,573 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:23:30,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 6 [2023-11-29 02:23:51,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:23:51,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:23:51,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:23:51,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 24 [2023-11-29 02:23:51,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 41 [2023-11-29 02:23:52,550 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 135 proven. 19 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2023-11-29 02:23:52,550 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:23:53,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:23:53,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419771065] [2023-11-29 02:23:53,152 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:23:53,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581187422] [2023-11-29 02:23:53,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581187422] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:23:53,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:23:53,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2023-11-29 02:23:53,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048550065] [2023-11-29 02:23:53,152 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 02:23:53,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-29 02:23:53,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:23:53,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-29 02:23:53,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1132, Unknown=5, NotChecked=0, Total=1260 [2023-11-29 02:23:53,154 INFO L87 Difference]: Start difference. First operand 333 states and 362 transitions. Second operand has 32 states, 26 states have (on average 4.230769230769231) internal successors, (110), 29 states have internal predecessors, (110), 11 states have call successors, (39), 5 states have call predecessors, (39), 10 states have return successors, (39), 10 states have call predecessors, (39), 10 states have call successors, (39) [2023-11-29 02:24:01,689 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:24:06,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:24:10,420 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:24:14,536 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 02:24:18,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:24:23,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:24:27,275 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:24:31,583 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:24:35,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:24:40,831 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:24:44,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:24:49,131 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:24:53,352 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:24:59,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:25:03,551 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:25:07,604 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:25:11,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:25:15,808 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:25:19,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:25:24,052 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:25:28,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:25:32,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:25:36,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:25:40,277 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:25:44,324 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:25:48,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:25:52,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:25:59,004 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:26:03,115 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:26:07,166 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:26:11,240 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:26:11,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:26:11,406 INFO L93 Difference]: Finished difference Result 466 states and 506 transitions. [2023-11-29 02:26:11,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-29 02:26:11,407 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 26 states have (on average 4.230769230769231) internal successors, (110), 29 states have internal predecessors, (110), 11 states have call successors, (39), 5 states have call predecessors, (39), 10 states have return successors, (39), 10 states have call predecessors, (39), 10 states have call successors, (39) Word has length 248 [2023-11-29 02:26:11,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:26:11,409 INFO L225 Difference]: With dead ends: 466 [2023-11-29 02:26:11,409 INFO L226 Difference]: Without dead ends: 415 [2023-11-29 02:26:11,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 229 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 23.4s TimeCoverageRelationStatistics Valid=501, Invalid=4186, Unknown=5, NotChecked=0, Total=4692 [2023-11-29 02:26:11,410 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 371 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 4467 mSolverCounterSat, 228 mSolverCounterUnsat, 31 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 134.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 1004 SdHoareTripleChecker+Invalid, 4726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 4467 IncrementalHoareTripleChecker+Invalid, 31 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 136.5s IncrementalHoareTripleChecker+Time [2023-11-29 02:26:11,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 1004 Invalid, 4726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 4467 Invalid, 31 Unknown, 0 Unchecked, 136.5s Time] [2023-11-29 02:26:11,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2023-11-29 02:26:11,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 334. [2023-11-29 02:26:11,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 224 states have (on average 1.0848214285714286) internal successors, (243), 227 states have internal predecessors, (243), 59 states have call successors, (59), 46 states have call predecessors, (59), 50 states have return successors, (62), 60 states have call predecessors, (62), 58 states have call successors, (62) [2023-11-29 02:26:11,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 364 transitions. [2023-11-29 02:26:11,489 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 364 transitions. Word has length 248 [2023-11-29 02:26:11,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:26:11,489 INFO L495 AbstractCegarLoop]: Abstraction has 334 states and 364 transitions. [2023-11-29 02:26:11,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 26 states have (on average 4.230769230769231) internal successors, (110), 29 states have internal predecessors, (110), 11 states have call successors, (39), 5 states have call predecessors, (39), 10 states have return successors, (39), 10 states have call predecessors, (39), 10 states have call successors, (39) [2023-11-29 02:26:11,489 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 364 transitions. [2023-11-29 02:26:11,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2023-11-29 02:26:11,491 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:26:11,491 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:26:11,503 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 02:26:11,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 02:26:11,692 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:26:11,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:26:11,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1577385148, now seen corresponding path program 1 times [2023-11-29 02:26:11,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:26:11,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108000317] [2023-11-29 02:26:11,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:11,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:26:11,751 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:26:11,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1759823337] [2023-11-29 02:26:11,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:11,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:26:11,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:26:11,752 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:26:11,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 02:26:12,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:12,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 2891 conjuncts, 155 conjunts are in the unsatisfiable core [2023-11-29 02:26:12,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:26:12,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:26:12,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 02:26:14,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-11-29 02:26:15,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 62 [2023-11-29 02:26:15,358 INFO L349 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2023-11-29 02:26:15,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 110 [2023-11-29 02:26:15,787 INFO L349 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2023-11-29 02:26:15,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 84 [2023-11-29 02:26:15,865 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-29 02:26:15,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 15 [2023-11-29 02:26:15,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:26:15,907 INFO L349 Elim1Store]: treesize reduction 93, result has 7.9 percent of original size [2023-11-29 02:26:15,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 75 treesize of output 50 [2023-11-29 02:26:16,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:26:16,055 INFO L349 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2023-11-29 02:26:16,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 1 [2023-11-29 02:26:16,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 245 treesize of output 160 [2023-11-29 02:26:16,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:26:16,529 INFO L349 Elim1Store]: treesize reduction 116, result has 52.5 percent of original size [2023-11-29 02:26:16,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 211 treesize of output 308 [2023-11-29 02:26:19,492 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 300 proven. 30 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-11-29 02:26:19,492 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:26:20,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:26:20,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108000317] [2023-11-29 02:26:20,182 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:26:20,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759823337] [2023-11-29 02:26:20,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759823337] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:26:20,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:26:20,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2023-11-29 02:26:20,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646756158] [2023-11-29 02:26:20,183 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 02:26:20,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-29 02:26:20,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:26:20,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-29 02:26:20,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1967, Unknown=0, NotChecked=0, Total=2162 [2023-11-29 02:26:20,185 INFO L87 Difference]: Start difference. First operand 334 states and 364 transitions. Second operand has 42 states, 33 states have (on average 4.121212121212121) internal successors, (136), 38 states have internal predecessors, (136), 18 states have call successors, (41), 6 states have call predecessors, (41), 12 states have return successors, (40), 17 states have call predecessors, (40), 17 states have call successors, (40) [2023-11-29 02:26:38,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:26:38,285 INFO L93 Difference]: Finished difference Result 455 states and 491 transitions. [2023-11-29 02:26:38,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-11-29 02:26:38,286 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 33 states have (on average 4.121212121212121) internal successors, (136), 38 states have internal predecessors, (136), 18 states have call successors, (41), 6 states have call predecessors, (41), 12 states have return successors, (40), 17 states have call predecessors, (40), 17 states have call successors, (40) Word has length 248 [2023-11-29 02:26:38,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:26:38,288 INFO L225 Difference]: With dead ends: 455 [2023-11-29 02:26:38,288 INFO L226 Difference]: Without dead ends: 403 [2023-11-29 02:26:38,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 190 SyntacticMatches, 28 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2574 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=747, Invalid=8373, Unknown=0, NotChecked=0, Total=9120 [2023-11-29 02:26:38,289 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 298 mSDsluCounter, 958 mSDsCounter, 0 mSdLazyCounter, 4906 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 1067 SdHoareTripleChecker+Invalid, 5094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 4906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.8s IncrementalHoareTripleChecker+Time [2023-11-29 02:26:38,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 1067 Invalid, 5094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 4906 Invalid, 0 Unknown, 0 Unchecked, 13.8s Time] [2023-11-29 02:26:38,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2023-11-29 02:26:38,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 334. [2023-11-29 02:26:38,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 224 states have (on average 1.0848214285714286) internal successors, (243), 227 states have internal predecessors, (243), 59 states have call successors, (59), 46 states have call predecessors, (59), 50 states have return successors, (62), 60 states have call predecessors, (62), 58 states have call successors, (62) [2023-11-29 02:26:38,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 364 transitions. [2023-11-29 02:26:38,391 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 364 transitions. Word has length 248 [2023-11-29 02:26:38,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:26:38,391 INFO L495 AbstractCegarLoop]: Abstraction has 334 states and 364 transitions. [2023-11-29 02:26:38,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 33 states have (on average 4.121212121212121) internal successors, (136), 38 states have internal predecessors, (136), 18 states have call successors, (41), 6 states have call predecessors, (41), 12 states have return successors, (40), 17 states have call predecessors, (40), 17 states have call successors, (40) [2023-11-29 02:26:38,392 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 364 transitions. [2023-11-29 02:26:38,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2023-11-29 02:26:38,393 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:26:38,393 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:26:38,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 02:26:38,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 02:26:38,594 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:26:38,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:26:38,594 INFO L85 PathProgramCache]: Analyzing trace with hash 726720952, now seen corresponding path program 1 times [2023-11-29 02:26:38,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:26:38,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837677045] [2023-11-29 02:26:38,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:38,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:26:38,650 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:26:38,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1307159635] [2023-11-29 02:26:38,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:38,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:26:38,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:26:38,651 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:26:38,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 02:26:46,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:46,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 2874 conjuncts, 253 conjunts are in the unsatisfiable core [2023-11-29 02:26:46,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:26:46,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 02:26:46,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:26:46,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2023-11-29 02:26:50,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:26:50,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:26:50,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:26:50,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:26:50,300 INFO L349 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2023-11-29 02:26:50,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 163 treesize of output 107 [2023-11-29 02:26:51,207 INFO L349 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2023-11-29 02:26:51,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 159 treesize of output 107 [2023-11-29 02:26:52,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:26:52,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:26:52,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:26:52,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:26:52,110 INFO L349 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2023-11-29 02:26:52,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 163 treesize of output 107 [2023-11-29 02:27:09,579 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:27:09,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 6 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 231 treesize of output 183 [2023-11-29 02:27:12,776 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 211 proven. 146 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-11-29 02:27:12,776 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:27:33,935 WARN L293 SmtUtils]: Spent 6.11s on a formula simplification that was a NOOP. DAG size: 8 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 02:27:38,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:27:38,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837677045] [2023-11-29 02:27:38,656 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:27:38,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307159635] [2023-11-29 02:27:38,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307159635] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:27:38,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:27:38,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2023-11-29 02:27:38,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982605130] [2023-11-29 02:27:38,657 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 02:27:38,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-29 02:27:38,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:27:38,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-29 02:27:38,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=4651, Unknown=2, NotChecked=0, Total=4970 [2023-11-29 02:27:38,659 INFO L87 Difference]: Start difference. First operand 334 states and 364 transitions. Second operand has 53 states, 41 states have (on average 3.292682926829268) internal successors, (135), 47 states have internal predecessors, (135), 24 states have call successors, (41), 7 states have call predecessors, (41), 16 states have return successors, (40), 21 states have call predecessors, (40), 24 states have call successors, (40) [2023-11-29 02:28:28,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:28:28,967 INFO L93 Difference]: Finished difference Result 418 states and 450 transitions. [2023-11-29 02:28:28,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-11-29 02:28:28,968 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 41 states have (on average 3.292682926829268) internal successors, (135), 47 states have internal predecessors, (135), 24 states have call successors, (41), 7 states have call predecessors, (41), 16 states have return successors, (40), 21 states have call predecessors, (40), 24 states have call successors, (40) Word has length 248 [2023-11-29 02:28:28,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:28:28,970 INFO L225 Difference]: With dead ends: 418 [2023-11-29 02:28:28,970 INFO L226 Difference]: Without dead ends: 348 [2023-11-29 02:28:28,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 302 SyntacticMatches, 22 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4405 ImplicationChecksByTransitivity, 48.2s TimeCoverageRelationStatistics Valid=979, Invalid=13781, Unknown=2, NotChecked=0, Total=14762 [2023-11-29 02:28:28,973 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 246 mSDsluCounter, 1541 mSDsCounter, 0 mSdLazyCounter, 4786 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 1641 SdHoareTripleChecker+Invalid, 4900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 4786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:28:28,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 1641 Invalid, 4900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 4786 Invalid, 0 Unknown, 0 Unchecked, 28.4s Time] [2023-11-29 02:28:28,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2023-11-29 02:28:29,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 338. [2023-11-29 02:28:29,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 227 states have (on average 1.079295154185022) internal successors, (245), 230 states have internal predecessors, (245), 59 states have call successors, (59), 47 states have call predecessors, (59), 51 states have return successors, (62), 60 states have call predecessors, (62), 58 states have call successors, (62) [2023-11-29 02:28:29,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 366 transitions. [2023-11-29 02:28:29,107 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 366 transitions. Word has length 248 [2023-11-29 02:28:29,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:28:29,107 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 366 transitions. [2023-11-29 02:28:29,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 41 states have (on average 3.292682926829268) internal successors, (135), 47 states have internal predecessors, (135), 24 states have call successors, (41), 7 states have call predecessors, (41), 16 states have return successors, (40), 21 states have call predecessors, (40), 24 states have call successors, (40) [2023-11-29 02:28:29,107 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 366 transitions. [2023-11-29 02:28:29,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2023-11-29 02:28:29,109 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:28:29,109 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:28:29,144 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 02:28:29,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 02:28:29,309 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:28:29,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:28:29,310 INFO L85 PathProgramCache]: Analyzing trace with hash -672863189, now seen corresponding path program 4 times [2023-11-29 02:28:29,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:28:29,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551192001] [2023-11-29 02:28:29,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:28:29,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:28:29,374 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:28:29,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2059791505] [2023-11-29 02:28:29,374 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:28:29,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:28:29,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:28:29,375 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:28:29,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 02:28:30,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:28:30,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:28:30,413 INFO L262 TraceCheckSpWp]: Trace formula consists of 2944 conjuncts, 157 conjunts are in the unsatisfiable core [2023-11-29 02:28:30,421 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:28:30,532 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 02:28:30,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:28:32,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 6 [2023-11-29 02:28:33,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 39 [2023-11-29 02:28:33,678 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:28:33,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 71 [2023-11-29 02:28:35,975 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 279 proven. 49 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-29 02:28:35,975 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:28:36,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:28:36,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551192001] [2023-11-29 02:28:36,749 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:28:36,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059791505] [2023-11-29 02:28:36,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059791505] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:28:36,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:28:36,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2023-11-29 02:28:36,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365790148] [2023-11-29 02:28:36,750 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 02:28:36,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-29 02:28:36,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:28:36,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-29 02:28:36,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1893, Unknown=0, NotChecked=0, Total=2070 [2023-11-29 02:28:36,752 INFO L87 Difference]: Start difference. First operand 338 states and 366 transitions. Second operand has 41 states, 33 states have (on average 4.0606060606060606) internal successors, (134), 37 states have internal predecessors, (134), 18 states have call successors, (41), 6 states have call predecessors, (41), 12 states have return successors, (40), 17 states have call predecessors, (40), 17 states have call successors, (40) [2023-11-29 02:29:01,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:29:01,912 INFO L93 Difference]: Finished difference Result 484 states and 522 transitions. [2023-11-29 02:29:01,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-11-29 02:29:01,913 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 33 states have (on average 4.0606060606060606) internal successors, (134), 37 states have internal predecessors, (134), 18 states have call successors, (41), 6 states have call predecessors, (41), 12 states have return successors, (40), 17 states have call predecessors, (40), 17 states have call successors, (40) Word has length 249 [2023-11-29 02:29:01,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:29:01,915 INFO L225 Difference]: With dead ends: 484 [2023-11-29 02:29:01,916 INFO L226 Difference]: Without dead ends: 433 [2023-11-29 02:29:01,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 193 SyntacticMatches, 28 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1821 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=608, Invalid=6702, Unknown=0, NotChecked=0, Total=7310 [2023-11-29 02:29:01,918 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 254 mSDsluCounter, 1196 mSDsCounter, 0 mSdLazyCounter, 5671 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 1307 SdHoareTripleChecker+Invalid, 5805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 5671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:29:01,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 1307 Invalid, 5805 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [134 Valid, 5671 Invalid, 0 Unknown, 0 Unchecked, 21.3s Time] [2023-11-29 02:29:01,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2023-11-29 02:29:02,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 339. [2023-11-29 02:29:02,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 228 states have (on average 1.0833333333333333) internal successors, (247), 231 states have internal predecessors, (247), 59 states have call successors, (59), 47 states have call predecessors, (59), 51 states have return successors, (62), 60 states have call predecessors, (62), 58 states have call successors, (62) [2023-11-29 02:29:02,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 368 transitions. [2023-11-29 02:29:02,091 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 368 transitions. Word has length 249 [2023-11-29 02:29:02,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:29:02,091 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 368 transitions. [2023-11-29 02:29:02,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 33 states have (on average 4.0606060606060606) internal successors, (134), 37 states have internal predecessors, (134), 18 states have call successors, (41), 6 states have call predecessors, (41), 12 states have return successors, (40), 17 states have call predecessors, (40), 17 states have call successors, (40) [2023-11-29 02:29:02,092 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 368 transitions. [2023-11-29 02:29:02,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2023-11-29 02:29:02,093 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:29:02,093 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:29:02,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-29 02:29:02,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:29:02,294 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:29:02,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:29:02,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1618942266, now seen corresponding path program 2 times [2023-11-29 02:29:02,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:29:02,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913652499] [2023-11-29 02:29:02,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:29:02,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:29:02,349 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:29:02,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1109546787] [2023-11-29 02:29:02,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:29:02,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:29:02,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:29:02,350 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:29:02,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 02:29:03,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:29:03,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:29:03,250 INFO L262 TraceCheckSpWp]: Trace formula consists of 2910 conjuncts, 150 conjunts are in the unsatisfiable core [2023-11-29 02:29:03,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:29:03,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 02:29:03,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:29:05,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-11-29 02:29:05,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2023-11-29 02:29:06,029 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:29:06,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2023-11-29 02:29:08,053 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 294 proven. 38 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-11-29 02:29:08,053 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:29:08,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:29:08,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913652499] [2023-11-29 02:29:08,790 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:29:08,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109546787] [2023-11-29 02:29:08,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109546787] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:29:08,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:29:08,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2023-11-29 02:29:08,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747595900] [2023-11-29 02:29:08,791 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 02:29:08,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-29 02:29:08,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:29:08,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-29 02:29:08,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1719, Unknown=0, NotChecked=0, Total=1892 [2023-11-29 02:29:08,793 INFO L87 Difference]: Start difference. First operand 339 states and 368 transitions. Second operand has 39 states, 32 states have (on average 4.28125) internal successors, (137), 35 states have internal predecessors, (137), 17 states have call successors, (41), 6 states have call predecessors, (41), 12 states have return successors, (40), 17 states have call predecessors, (40), 16 states have call successors, (40) [2023-11-29 02:29:33,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:29:33,371 INFO L93 Difference]: Finished difference Result 460 states and 495 transitions. [2023-11-29 02:29:33,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-11-29 02:29:33,372 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 32 states have (on average 4.28125) internal successors, (137), 35 states have internal predecessors, (137), 17 states have call successors, (41), 6 states have call predecessors, (41), 12 states have return successors, (40), 17 states have call predecessors, (40), 16 states have call successors, (40) Word has length 249 [2023-11-29 02:29:33,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:29:33,374 INFO L225 Difference]: With dead ends: 460 [2023-11-29 02:29:33,374 INFO L226 Difference]: Without dead ends: 408 [2023-11-29 02:29:33,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 194 SyntacticMatches, 28 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2350 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=714, Invalid=8028, Unknown=0, NotChecked=0, Total=8742 [2023-11-29 02:29:33,376 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 257 mSDsluCounter, 1278 mSDsCounter, 0 mSdLazyCounter, 4368 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 1385 SdHoareTripleChecker+Invalid, 4522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 4368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:29:33,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 1385 Invalid, 4522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 4368 Invalid, 0 Unknown, 0 Unchecked, 20.0s Time] [2023-11-29 02:29:33,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2023-11-29 02:29:33,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 339. [2023-11-29 02:29:33,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 228 states have (on average 1.0833333333333333) internal successors, (247), 231 states have internal predecessors, (247), 59 states have call successors, (59), 47 states have call predecessors, (59), 51 states have return successors, (62), 60 states have call predecessors, (62), 58 states have call successors, (62) [2023-11-29 02:29:33,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 368 transitions. [2023-11-29 02:29:33,525 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 368 transitions. Word has length 249 [2023-11-29 02:29:33,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:29:33,526 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 368 transitions. [2023-11-29 02:29:33,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 32 states have (on average 4.28125) internal successors, (137), 35 states have internal predecessors, (137), 17 states have call successors, (41), 6 states have call predecessors, (41), 12 states have return successors, (40), 17 states have call predecessors, (40), 16 states have call successors, (40) [2023-11-29 02:29:33,526 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 368 transitions. [2023-11-29 02:29:33,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2023-11-29 02:29:33,528 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:29:33,528 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:29:33,540 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 02:29:33,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:29:33,729 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:29:33,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:29:33,729 INFO L85 PathProgramCache]: Analyzing trace with hash 685163834, now seen corresponding path program 1 times [2023-11-29 02:29:33,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:29:33,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972325017] [2023-11-29 02:29:33,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:29:33,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:29:33,803 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:29:33,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [509820624] [2023-11-29 02:29:33,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:29:33,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:29:33,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:29:33,804 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:29:33,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 02:29:42,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:29:42,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 2893 conjuncts, 225 conjunts are in the unsatisfiable core [2023-11-29 02:29:42,181 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:29:42,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 02:29:42,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:29:42,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2023-11-29 02:29:44,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:29:44,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:29:44,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:29:44,557 INFO L349 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2023-11-29 02:29:44,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 71 [2023-11-29 02:29:45,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:29:45,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:29:45,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:29:45,136 INFO L349 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2023-11-29 02:29:45,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 71 [2023-11-29 02:29:45,789 INFO L349 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2023-11-29 02:29:45,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 102 treesize of output 71 [2023-11-29 02:29:55,550 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:29:55,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 156 treesize of output 128 [2023-11-29 02:29:55,583 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-11-29 02:29:55,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 10 [2023-11-29 02:29:55,933 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:29:55,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 108 treesize of output 96 [2023-11-29 02:29:57,111 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 224 proven. 122 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-11-29 02:29:57,112 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:30:01,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:30:01,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972325017] [2023-11-29 02:30:01,589 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:30:01,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509820624] [2023-11-29 02:30:01,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509820624] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:30:01,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:30:01,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2023-11-29 02:30:01,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354940362] [2023-11-29 02:30:01,590 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 02:30:01,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-11-29 02:30:01,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:30:01,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-11-29 02:30:01,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=3910, Unknown=6, NotChecked=0, Total=4160 [2023-11-29 02:30:01,592 INFO L87 Difference]: Start difference. First operand 339 states and 368 transitions. Second operand has 48 states, 38 states have (on average 3.4473684210526314) internal successors, (131), 44 states have internal predecessors, (131), 23 states have call successors, (40), 5 states have call predecessors, (40), 15 states have return successors, (39), 20 states have call predecessors, (39), 23 states have call successors, (39) [2023-11-29 02:30:29,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:30:29,474 INFO L93 Difference]: Finished difference Result 413 states and 445 transitions. [2023-11-29 02:30:29,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-11-29 02:30:29,474 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 38 states have (on average 3.4473684210526314) internal successors, (131), 44 states have internal predecessors, (131), 23 states have call successors, (40), 5 states have call predecessors, (40), 15 states have return successors, (39), 20 states have call predecessors, (39), 23 states have call successors, (39) Word has length 249 [2023-11-29 02:30:29,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:30:29,476 INFO L225 Difference]: With dead ends: 413 [2023-11-29 02:30:29,476 INFO L226 Difference]: Without dead ends: 343 [2023-11-29 02:30:29,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 309 SyntacticMatches, 23 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3239 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=653, Invalid=10897, Unknown=6, NotChecked=0, Total=11556 [2023-11-29 02:30:29,478 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 211 mSDsluCounter, 3590 mSDsCounter, 0 mSdLazyCounter, 3936 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 3733 SdHoareTripleChecker+Invalid, 4012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 3936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:30:29,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 3733 Invalid, 4012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 3936 Invalid, 0 Unknown, 0 Unchecked, 18.4s Time] [2023-11-29 02:30:29,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2023-11-29 02:30:29,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 339. [2023-11-29 02:30:29,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 228 states have (on average 1.0789473684210527) internal successors, (246), 231 states have internal predecessors, (246), 59 states have call successors, (59), 47 states have call predecessors, (59), 51 states have return successors, (62), 60 states have call predecessors, (62), 58 states have call successors, (62) [2023-11-29 02:30:29,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 367 transitions. [2023-11-29 02:30:29,638 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 367 transitions. Word has length 249 [2023-11-29 02:30:29,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:30:29,639 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 367 transitions. [2023-11-29 02:30:29,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 38 states have (on average 3.4473684210526314) internal successors, (131), 44 states have internal predecessors, (131), 23 states have call successors, (40), 5 states have call predecessors, (40), 15 states have return successors, (39), 20 states have call predecessors, (39), 23 states have call successors, (39) [2023-11-29 02:30:29,639 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 367 transitions. [2023-11-29 02:30:29,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2023-11-29 02:30:29,640 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:30:29,641 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:30:29,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 02:30:29,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:30:29,841 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:30:29,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:30:29,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1961133847, now seen corresponding path program 5 times [2023-11-29 02:30:29,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:30:29,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813826679] [2023-11-29 02:30:29,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:30:29,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:30:29,901 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:30:29,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1602823691] [2023-11-29 02:30:29,901 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:30:29,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:30:29,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:30:29,902 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:30:29,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfa361e-c1b2-4a52-9728-922d3b3db817/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process