./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_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_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/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_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/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_0f7e57f6-2414-4688-bf8b-453ae96b49bc/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 4fce72e4c86270281dd05ead367908aebeea58cd11d1d4da51b0e6a5af67a67d --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 02:06:25,016 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 02:06:25,076 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-64bit-Automizer_Default.epf [2023-11-29 02:06:25,080 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 02:06:25,080 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 02:06:25,103 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 02:06:25,103 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 02:06:25,104 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 02:06:25,104 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 02:06:25,105 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 02:06:25,105 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 02:06:25,106 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 02:06:25,107 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 02:06:25,107 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 02:06:25,108 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 02:06:25,108 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 02:06:25,109 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 02:06:25,109 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 02:06:25,110 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 02:06:25,110 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 02:06:25,111 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 02:06:25,112 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 02:06:25,112 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 02:06:25,113 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 02:06:25,113 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 02:06:25,114 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 02:06:25,114 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 02:06:25,114 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 02:06:25,115 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:06:25,115 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 02:06:25,116 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 02:06:25,116 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 02:06:25,116 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 02:06:25,117 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 02:06:25,117 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 02:06:25,117 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 02:06:25,117 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 02:06:25,117 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 02:06:25,118 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 02:06:25,118 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_0f7e57f6-2414-4688-bf8b-453ae96b49bc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4fce72e4c86270281dd05ead367908aebeea58cd11d1d4da51b0e6a5af67a67d [2023-11-29 02:06:25,318 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 02:06:25,339 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 02:06:25,341 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 02:06:25,342 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 02:06:25,342 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 02:06:25,343 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i [2023-11-29 02:06:28,203 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 02:06:28,604 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 02:06:28,605 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i [2023-11-29 02:06:28,635 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/data/7d4c2d833/8040cb5688ad440da537feb5311c9a9e/FLAG02ddffb36 [2023-11-29 02:06:28,647 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/data/7d4c2d833/8040cb5688ad440da537feb5311c9a9e [2023-11-29 02:06:28,650 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 02:06:28,652 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 02:06:28,653 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 02:06:28,653 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 02:06:28,658 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 02:06:28,659 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:06:28" (1/1) ... [2023-11-29 02:06:28,660 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@657d78cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:06:28, skipping insertion in model container [2023-11-29 02:06:28,660 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:06:28" (1/1) ... [2023-11-29 02:06:28,757 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 02:06:28,980 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_0f7e57f6-2414-4688-bf8b-453ae96b49bc/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i[4503,4516] [2023-11-29 02:06:28,987 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_0f7e57f6-2414-4688-bf8b-453ae96b49bc/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i[4563,4576] [2023-11-29 02:06:29,895 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:06:29,895 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:06:29,896 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:06:29,897 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:06:29,898 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:06:29,926 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:06:29,927 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:06:29,929 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:06:29,929 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:06:30,288 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-29 02:06:30,289 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-29 02:06:30,290 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-29 02:06:30,291 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-29 02:06:30,293 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-29 02:06:30,294 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-29 02:06:30,295 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-29 02:06:30,295 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-29 02:06:30,296 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-29 02:06:30,297 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-29 02:06:30,453 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:06:30,454 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:06:30,534 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:06:30,535 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:06:30,599 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:06:30,645 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 02:06:30,657 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_0f7e57f6-2414-4688-bf8b-453ae96b49bc/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i[4503,4516] [2023-11-29 02:06:30,658 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_0f7e57f6-2414-4688-bf8b-453ae96b49bc/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i[4563,4576] [2023-11-29 02:06:30,692 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:06:30,693 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:06:30,693 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:06:30,694 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:06:30,695 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:06:30,701 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:06:30,701 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:06:30,702 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:06:30,702 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:06:30,735 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-29 02:06:30,736 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-29 02:06:30,737 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-29 02:06:30,737 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-29 02:06:30,739 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-29 02:06:30,739 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-29 02:06:30,740 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-29 02:06:30,740 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-29 02:06:30,740 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-29 02:06:30,741 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-29 02:06:30,764 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:06:30,764 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:06:30,802 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : "+r"(index)); [8097] [2023-11-29 02:06:30,803 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:06:30,804 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 02:06:30,817 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [8583-8594] [2023-11-29 02:06:30,833 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:06:31,129 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:06:31,129 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:06:31,129 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:06:31,129 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:06:31,130 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:06:31,130 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:06:31,130 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:06:31,130 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:06:31,130 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:06:31,130 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:06:31,131 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:06:31,131 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:06:31,131 WARN L675 CHandler]: The function predicate is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:06:31,131 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:06:31,131 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:06:31,131 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:06:31,132 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:06:31,132 WARN L675 CHandler]: The function memchr is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:06:31,140 INFO L206 MainTranslator]: Completed translation [2023-11-29 02:06:31,140 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:06:31 WrapperNode [2023-11-29 02:06:31,140 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 02:06:31,141 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 02:06:31,142 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 02:06:31,142 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 02:06:31,148 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:06:31" (1/1) ... [2023-11-29 02:06:31,251 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:06:31" (1/1) ... [2023-11-29 02:06:31,338 INFO L138 Inliner]: procedures = 691, calls = 2503, calls flagged for inlining = 57, calls inlined = 12, statements flattened = 1002 [2023-11-29 02:06:31,339 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 02:06:31,339 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 02:06:31,340 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 02:06:31,340 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 02:06:31,352 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:06:31" (1/1) ... [2023-11-29 02:06:31,352 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:06:31" (1/1) ... [2023-11-29 02:06:31,362 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:06:31" (1/1) ... [2023-11-29 02:06:31,422 WARN L109 MemorySlicer]: Omit memory slicing because it failed with the following exception: Unsupported: Memory array in LHS [2023-11-29 02:06:31,422 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:06:31" (1/1) ... [2023-11-29 02:06:31,423 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:06:31" (1/1) ... [2023-11-29 02:06:31,459 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:06:31" (1/1) ... [2023-11-29 02:06:31,464 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:06:31" (1/1) ... [2023-11-29 02:06:31,474 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:06:31" (1/1) ... [2023-11-29 02:06:31,481 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:06:31" (1/1) ... [2023-11-29 02:06:31,493 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 02:06:31,494 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 02:06:31,495 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 02:06:31,495 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 02:06:31,496 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:06:31" (1/1) ... [2023-11-29 02:06:31,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:06:31,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:06:31,526 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 02:06:31,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 02:06:31,562 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2023-11-29 02:06:31,562 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2023-11-29 02:06:31,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 02:06:31,562 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-29 02:06:31,563 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-29 02:06:31,563 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-29 02:06:31,563 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-29 02:06:31,563 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-29 02:06:31,563 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-29 02:06:31,563 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-29 02:06:31,563 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 02:06:31,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 02:06:31,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-29 02:06:31,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 02:06:31,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 02:06:31,564 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-29 02:06:31,564 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-29 02:06:31,564 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_realloc [2023-11-29 02:06:31,565 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_realloc [2023-11-29 02:06:31,565 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2023-11-29 02:06:31,565 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2023-11-29 02:06:31,565 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 02:06:31,565 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 02:06:31,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 02:06:31,565 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2023-11-29 02:06:31,565 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2023-11-29 02:06:31,566 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-29 02:06:31,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-29 02:06:31,566 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-11-29 02:06:31,566 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-11-29 02:06:31,566 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2023-11-29 02:06:31,566 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2023-11-29 02:06:31,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-29 02:06:31,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-29 02:06:31,824 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 02:06:31,826 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 02:06:32,915 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 02:06:33,040 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 02:06:33,041 INFO L309 CfgBuilder]: Removed 8 assume(true) statements. [2023-11-29 02:06:33,041 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:06:33 BoogieIcfgContainer [2023-11-29 02:06:33,041 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 02:06:33,044 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 02:06:33,044 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 02:06:33,047 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 02:06:33,047 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 02:06:28" (1/3) ... [2023-11-29 02:06:33,048 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f55d2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:06:33, skipping insertion in model container [2023-11-29 02:06:33,048 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:06:31" (2/3) ... [2023-11-29 02:06:33,048 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f55d2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:06:33, skipping insertion in model container [2023-11-29 02:06:33,048 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:06:33" (3/3) ... [2023-11-29 02:06:33,050 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_reserve_relative_harness.i [2023-11-29 02:06:33,069 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 02:06:33,069 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 02:06:33,122 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:06:33,129 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;@2be4031b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:06:33,129 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 02:06:33,134 INFO L276 IsEmpty]: Start isEmpty. Operand has 145 states, 96 states have (on average 1.3645833333333333) internal successors, (131), 95 states have internal predecessors, (131), 38 states have call successors, (38), 11 states have call predecessors, (38), 11 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2023-11-29 02:06:33,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-29 02:06:33,144 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:06:33,145 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-29 02:06:33,145 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:06:33,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:06:33,151 INFO L85 PathProgramCache]: Analyzing trace with hash -778588719, now seen corresponding path program 1 times [2023-11-29 02:06:33,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:06:33,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571526111] [2023-11-29 02:06:33,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:06:33,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:06:33,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:33,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:06:33,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:33,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:06:33,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:33,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:06:33,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:33,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 02:06:33,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:33,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 02:06:33,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:33,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-29 02:06:33,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:33,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:06:33,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:06:33,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571526111] [2023-11-29 02:06:33,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571526111] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:06:33,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:06:33,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:06:33,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955900385] [2023-11-29 02:06:33,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:06:33,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:06:33,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:06:33,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:06:33,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:06:33,803 INFO L87 Difference]: Start difference. First operand has 145 states, 96 states have (on average 1.3645833333333333) internal successors, (131), 95 states have internal predecessors, (131), 38 states have call successors, (38), 11 states have call predecessors, (38), 11 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-29 02:06:34,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:06:34,389 INFO L93 Difference]: Finished difference Result 289 states and 424 transitions. [2023-11-29 02:06:34,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:06:34,392 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2023-11-29 02:06:34,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:06:34,402 INFO L225 Difference]: With dead ends: 289 [2023-11-29 02:06:34,403 INFO L226 Difference]: Without dead ends: 151 [2023-11-29 02:06:34,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:06:34,410 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 114 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 02:06:34,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 236 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 02:06:34,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-11-29 02:06:34,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 143. [2023-11-29 02:06:34,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 93 states have (on average 1.2903225806451613) internal successors, (120), 94 states have internal predecessors, (120), 38 states have call successors, (38), 11 states have call predecessors, (38), 11 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2023-11-29 02:06:34,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 195 transitions. [2023-11-29 02:06:34,459 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 195 transitions. Word has length 39 [2023-11-29 02:06:34,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:06:34,460 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 195 transitions. [2023-11-29 02:06:34,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-29 02:06:34,461 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 195 transitions. [2023-11-29 02:06:34,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-29 02:06:34,463 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:06:34,463 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-29 02:06:34,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 02:06:34,464 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:06:34,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:06:34,464 INFO L85 PathProgramCache]: Analyzing trace with hash -413453679, now seen corresponding path program 1 times [2023-11-29 02:06:34,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:06:34,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655731720] [2023-11-29 02:06:34,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:06:34,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:06:34,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:35,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:06:35,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:35,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:06:35,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:35,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:06:35,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:35,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 02:06:35,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:35,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 02:06:35,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:35,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-29 02:06:35,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:35,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:06:35,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:06:35,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655731720] [2023-11-29 02:06:35,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655731720] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:06:35,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:06:35,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 02:06:35,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548475277] [2023-11-29 02:06:35,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:06:35,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 02:06:35,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:06:35,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 02:06:35,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:06:35,194 INFO L87 Difference]: Start difference. First operand 143 states and 195 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-29 02:06:36,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:06:36,041 INFO L93 Difference]: Finished difference Result 283 states and 389 transitions. [2023-11-29 02:06:36,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 02:06:36,042 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 39 [2023-11-29 02:06:36,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:06:36,044 INFO L225 Difference]: With dead ends: 283 [2023-11-29 02:06:36,045 INFO L226 Difference]: Without dead ends: 153 [2023-11-29 02:06:36,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-29 02:06:36,048 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 188 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 02:06:36,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 422 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 02:06:36,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-11-29 02:06:36,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 145. [2023-11-29 02:06:36,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 94 states have (on average 1.2872340425531914) internal successors, (121), 96 states have internal predecessors, (121), 38 states have call successors, (38), 11 states have call predecessors, (38), 12 states have return successors, (43), 37 states have call predecessors, (43), 37 states have call successors, (43) [2023-11-29 02:06:36,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 202 transitions. [2023-11-29 02:06:36,074 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 202 transitions. Word has length 39 [2023-11-29 02:06:36,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:06:36,074 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 202 transitions. [2023-11-29 02:06:36,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-29 02:06:36,075 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 202 transitions. [2023-11-29 02:06:36,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-29 02:06:36,076 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:06:36,077 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-29 02:06:36,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 02:06:36,077 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:06:36,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:06:36,078 INFO L85 PathProgramCache]: Analyzing trace with hash 886733990, now seen corresponding path program 1 times [2023-11-29 02:06:36,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:06:36,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627545853] [2023-11-29 02:06:36,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:06:36,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:06:36,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:36,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:06:36,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:36,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:06:36,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:36,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:06:36,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:36,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 02:06:36,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:36,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-29 02:06:36,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:36,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 02:06:36,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:36,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:06:36,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:06:36,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627545853] [2023-11-29 02:06:36,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627545853] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:06:36,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:06:36,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 02:06:36,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597046952] [2023-11-29 02:06:36,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:06:36,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 02:06:36,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:06:36,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 02:06:36,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-29 02:06:36,700 INFO L87 Difference]: Start difference. First operand 145 states and 202 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-29 02:06:37,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:06:37,654 INFO L93 Difference]: Finished difference Result 191 states and 257 transitions. [2023-11-29 02:06:37,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 02:06:37,654 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 45 [2023-11-29 02:06:37,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:06:37,657 INFO L225 Difference]: With dead ends: 191 [2023-11-29 02:06:37,657 INFO L226 Difference]: Without dead ends: 157 [2023-11-29 02:06:37,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-11-29 02:06:37,659 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 117 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 02:06:37,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 581 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 02:06:37,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-11-29 02:06:37,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 147. [2023-11-29 02:06:37,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 96 states have (on average 1.28125) internal successors, (123), 98 states have internal predecessors, (123), 38 states have call successors, (38), 11 states have call predecessors, (38), 12 states have return successors, (43), 37 states have call predecessors, (43), 37 states have call successors, (43) [2023-11-29 02:06:37,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 204 transitions. [2023-11-29 02:06:37,681 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 204 transitions. Word has length 45 [2023-11-29 02:06:37,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:06:37,681 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 204 transitions. [2023-11-29 02:06:37,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-29 02:06:37,682 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 204 transitions. [2023-11-29 02:06:37,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-29 02:06:37,684 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:06:37,684 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-29 02:06:37,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 02:06:37,684 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:06:37,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:06:37,685 INFO L85 PathProgramCache]: Analyzing trace with hash -978821000, now seen corresponding path program 1 times [2023-11-29 02:06:37,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:06:37,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281901497] [2023-11-29 02:06:37,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:06:37,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:06:37,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:38,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:06:38,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:38,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:06:38,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:38,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:06:38,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:38,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 02:06:38,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:38,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-29 02:06:38,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:38,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-29 02:06:38,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:38,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 02:06:38,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:38,758 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 02:06:38,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:06:38,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281901497] [2023-11-29 02:06:38,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281901497] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:06:38,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263961428] [2023-11-29 02:06:38,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:06:38,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:06:38,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:06:38,763 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:06:38,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 02:06:39,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:39,264 INFO L262 TraceCheckSpWp]: Trace formula consists of 2452 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 02:06:39,272 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:06:39,361 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 02:06:39,362 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:06:39,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263961428] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:06:39,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:06:39,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 16 [2023-11-29 02:06:39,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286405793] [2023-11-29 02:06:39,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:06:39,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:06:39,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:06:39,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:06:39,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2023-11-29 02:06:39,364 INFO L87 Difference]: Start difference. First operand 147 states and 204 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-29 02:06:39,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:06:39,675 INFO L93 Difference]: Finished difference Result 187 states and 253 transitions. [2023-11-29 02:06:39,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 02:06:39,675 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 52 [2023-11-29 02:06:39,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:06:39,678 INFO L225 Difference]: With dead ends: 187 [2023-11-29 02:06:39,678 INFO L226 Difference]: Without dead ends: 153 [2023-11-29 02:06:39,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2023-11-29 02:06:39,680 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 3 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 917 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:06:39,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 917 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 02:06:39,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-11-29 02:06:39,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 147. [2023-11-29 02:06:39,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 96 states have (on average 1.28125) internal successors, (123), 98 states have internal predecessors, (123), 38 states have call successors, (38), 11 states have call predecessors, (38), 12 states have return successors, (43), 37 states have call predecessors, (43), 37 states have call successors, (43) [2023-11-29 02:06:39,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 204 transitions. [2023-11-29 02:06:39,699 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 204 transitions. Word has length 52 [2023-11-29 02:06:39,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:06:39,699 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 204 transitions. [2023-11-29 02:06:39,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-29 02:06:39,699 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 204 transitions. [2023-11-29 02:06:39,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-29 02:06:39,702 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:06:39,702 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-29 02:06:39,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 02:06:39,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:06:39,907 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:06:39,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:06:39,908 INFO L85 PathProgramCache]: Analyzing trace with hash 697155161, now seen corresponding path program 1 times [2023-11-29 02:06:39,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:06:39,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189473254] [2023-11-29 02:06:39,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:06:39,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:06:40,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:40,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:06:40,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:40,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:06:40,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:40,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:06:40,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:40,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 02:06:40,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:40,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-29 02:06:40,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:40,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 02:06:40,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:40,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-11-29 02:06:40,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:40,861 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 02:06:40,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:06:40,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189473254] [2023-11-29 02:06:40,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189473254] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:06:40,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:06:40,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-29 02:06:40,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330671485] [2023-11-29 02:06:40,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:06:40,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 02:06:40,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:06:40,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 02:06:40,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-11-29 02:06:40,864 INFO L87 Difference]: Start difference. First operand 147 states and 204 transitions. Second operand has 10 states, 8 states have (on average 4.0) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-29 02:06:41,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:06:41,961 INFO L93 Difference]: Finished difference Result 165 states and 228 transitions. [2023-11-29 02:06:41,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 02:06:41,961 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 4.0) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 56 [2023-11-29 02:06:41,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:06:41,964 INFO L225 Difference]: With dead ends: 165 [2023-11-29 02:06:41,964 INFO L226 Difference]: Without dead ends: 158 [2023-11-29 02:06:41,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2023-11-29 02:06:41,965 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 139 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 842 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:06:41,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 792 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 842 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 02:06:41,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-11-29 02:06:41,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 150. [2023-11-29 02:06:41,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 98 states have (on average 1.2755102040816326) internal successors, (125), 101 states have internal predecessors, (125), 38 states have call successors, (38), 11 states have call predecessors, (38), 13 states have return successors, (50), 37 states have call predecessors, (50), 37 states have call successors, (50) [2023-11-29 02:06:41,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 213 transitions. [2023-11-29 02:06:41,982 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 213 transitions. Word has length 56 [2023-11-29 02:06:41,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:06:41,983 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 213 transitions. [2023-11-29 02:06:41,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 4.0) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-29 02:06:41,983 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 213 transitions. [2023-11-29 02:06:41,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-29 02:06:41,985 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:06:41,985 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-29 02:06:41,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 02:06:41,985 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:06:41,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:06:41,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1916814737, now seen corresponding path program 1 times [2023-11-29 02:06:41,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:06:41,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536993905] [2023-11-29 02:06:41,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:06:41,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:06:42,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:42,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:06:42,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:42,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:06:42,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:42,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:06:42,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:42,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 02:06:42,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:42,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-29 02:06:42,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:42,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 02:06:42,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:42,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-11-29 02:06:42,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:42,881 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 02:06:42,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:06:42,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536993905] [2023-11-29 02:06:42,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536993905] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:06:42,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:06:42,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 02:06:42,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806516035] [2023-11-29 02:06:42,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:06:42,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 02:06:42,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:06:42,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 02:06:42,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:06:42,884 INFO L87 Difference]: Start difference. First operand 150 states and 213 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-29 02:06:43,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:06:43,960 INFO L93 Difference]: Finished difference Result 318 states and 466 transitions. [2023-11-29 02:06:43,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 02:06:43,961 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 60 [2023-11-29 02:06:43,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:06:43,963 INFO L225 Difference]: With dead ends: 318 [2023-11-29 02:06:43,964 INFO L226 Difference]: Without dead ends: 181 [2023-11-29 02:06:43,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2023-11-29 02:06:43,966 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 191 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:06:43,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 498 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 02:06:43,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-11-29 02:06:43,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 155. [2023-11-29 02:06:43,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 103 states have (on average 1.2815533980582525) internal successors, (132), 106 states have internal predecessors, (132), 38 states have call successors, (38), 11 states have call predecessors, (38), 13 states have return successors, (50), 37 states have call predecessors, (50), 37 states have call successors, (50) [2023-11-29 02:06:43,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 220 transitions. [2023-11-29 02:06:43,983 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 220 transitions. Word has length 60 [2023-11-29 02:06:43,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:06:43,984 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 220 transitions. [2023-11-29 02:06:43,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-29 02:06:43,984 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 220 transitions. [2023-11-29 02:06:43,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-29 02:06:43,986 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:06:43,986 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-29 02:06:43,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 02:06:43,986 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:06:43,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:06:43,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1677087981, now seen corresponding path program 1 times [2023-11-29 02:06:43,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:06:43,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736008215] [2023-11-29 02:06:43,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:06:43,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:06:44,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:46,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:06:46,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:46,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:06:46,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:46,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:06:46,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:46,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 02:06:46,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:46,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-29 02:06:46,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:46,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 02:06:46,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:46,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-11-29 02:06:46,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:46,595 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 02:06:46,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:06:46,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736008215] [2023-11-29 02:06:46,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736008215] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:06:46,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865458390] [2023-11-29 02:06:46,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:06:46,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:06:46,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:06:46,597 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:06:46,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 02:06:47,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:47,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 2471 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-29 02:06:47,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:06:47,205 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 02:06:47,574 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:06:47,574 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:06:47,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865458390] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:06:47,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:06:47,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [16] total 24 [2023-11-29 02:06:47,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032286245] [2023-11-29 02:06:47,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:06:47,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 02:06:47,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:06:47,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 02:06:47,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2023-11-29 02:06:47,578 INFO L87 Difference]: Start difference. First operand 155 states and 220 transitions. Second operand has 11 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-29 02:06:53,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:06:57,633 WARN L539 Checker$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 02:07:01,647 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:07:05,674 WARN L539 Checker$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 02:07:09,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:07:13,853 WARN L539 Checker$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 02:07:17,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:07:21,905 WARN L539 Checker$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 02:07:25,974 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 02:07:25,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:07:25,992 INFO L93 Difference]: Finished difference Result 419 states and 590 transitions. [2023-11-29 02:07:25,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 02:07:25,992 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 60 [2023-11-29 02:07:25,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:07:25,995 INFO L225 Difference]: With dead ends: 419 [2023-11-29 02:07:25,995 INFO L226 Difference]: Without dead ends: 277 [2023-11-29 02:07:25,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2023-11-29 02:07:25,997 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 200 mSDsluCounter, 1221 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 18 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1470 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:07:25,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1470 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 712 Invalid, 9 Unknown, 0 Unchecked, 38.2s Time] [2023-11-29 02:07:25,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2023-11-29 02:07:26,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 266. [2023-11-29 02:07:26,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 181 states have (on average 1.298342541436464) internal successors, (235), 186 states have internal predecessors, (235), 62 states have call successors, (62), 19 states have call predecessors, (62), 22 states have return successors, (72), 60 states have call predecessors, (72), 60 states have call successors, (72) [2023-11-29 02:07:26,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 369 transitions. [2023-11-29 02:07:26,023 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 369 transitions. Word has length 60 [2023-11-29 02:07:26,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:07:26,023 INFO L495 AbstractCegarLoop]: Abstraction has 266 states and 369 transitions. [2023-11-29 02:07:26,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-29 02:07:26,024 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 369 transitions. [2023-11-29 02:07:26,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-29 02:07:26,025 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:07:26,025 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-29 02:07:26,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 02:07:26,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 02:07:26,226 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:07:26,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:07:26,226 INFO L85 PathProgramCache]: Analyzing trace with hash -849958759, now seen corresponding path program 1 times [2023-11-29 02:07:26,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:07:26,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55674774] [2023-11-29 02:07:26,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:07:26,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:07:26,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:07:26,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:07:26,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:07:26,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:07:26,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:07:26,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:07:26,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:07:26,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 02:07:26,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:07:26,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-29 02:07:26,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:07:27,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-29 02:07:27,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:07:27,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-11-29 02:07:27,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:07:27,035 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 02:07:27,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:07:27,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55674774] [2023-11-29 02:07:27,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55674774] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:07:27,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103194247] [2023-11-29 02:07:27,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:07:27,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:07:27,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:07:27,037 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:07:27,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 02:07:27,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:07:27,584 INFO L262 TraceCheckSpWp]: Trace formula consists of 2478 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 02:07:27,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:07:27,618 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:07:27,618 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:07:27,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103194247] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:07:27,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:07:27,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 12 [2023-11-29 02:07:27,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910231916] [2023-11-29 02:07:27,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:07:27,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 02:07:27,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:07:27,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 02:07:27,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-11-29 02:07:27,620 INFO L87 Difference]: Start difference. First operand 266 states and 369 transitions. Second operand has 9 states, 7 states have (on average 7.0) internal successors, (49), 8 states have internal predecessors, (49), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-29 02:07:28,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:07:28,113 INFO L93 Difference]: Finished difference Result 531 states and 751 transitions. [2023-11-29 02:07:28,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 02:07:28,114 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 7.0) internal successors, (49), 8 states have internal predecessors, (49), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 64 [2023-11-29 02:07:28,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:07:28,117 INFO L225 Difference]: With dead ends: 531 [2023-11-29 02:07:28,117 INFO L226 Difference]: Without dead ends: 278 [2023-11-29 02:07:28,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-11-29 02:07:28,119 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 13 mSDsluCounter, 1186 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1361 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:07:28,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 1361 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 02:07:28,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2023-11-29 02:07:28,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 270. [2023-11-29 02:07:28,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 184 states have (on average 1.2934782608695652) internal successors, (238), 190 states have internal predecessors, (238), 62 states have call successors, (62), 19 states have call predecessors, (62), 23 states have return successors, (78), 60 states have call predecessors, (78), 60 states have call successors, (78) [2023-11-29 02:07:28,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 378 transitions. [2023-11-29 02:07:28,145 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 378 transitions. Word has length 64 [2023-11-29 02:07:28,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:07:28,146 INFO L495 AbstractCegarLoop]: Abstraction has 270 states and 378 transitions. [2023-11-29 02:07:28,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 7.0) internal successors, (49), 8 states have internal predecessors, (49), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-29 02:07:28,146 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 378 transitions. [2023-11-29 02:07:28,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-29 02:07:28,147 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:07:28,148 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-29 02:07:28,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 02:07:28,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-29 02:07:28,348 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:07:28,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:07:28,349 INFO L85 PathProgramCache]: Analyzing trace with hash -975669026, now seen corresponding path program 1 times [2023-11-29 02:07:28,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:07:28,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525230921] [2023-11-29 02:07:28,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:07:28,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:07:28,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:07:28,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:07:28,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:07:28,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:07:28,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:07:28,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:07:28,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:07:28,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 02:07:28,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:07:28,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-29 02:07:28,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:07:28,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-11-29 02:07:28,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:07:28,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-29 02:07:28,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:07:28,609 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 02:07:28,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:07:28,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525230921] [2023-11-29 02:07:28,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525230921] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:07:28,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958994415] [2023-11-29 02:07:28,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:07:28,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:07:28,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:07:28,611 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:07:28,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 02:07:28,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:07:28,982 INFO L262 TraceCheckSpWp]: Trace formula consists of 2483 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 02:07:28,985 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:07:28,991 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:07:28,991 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:07:28,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958994415] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:07:28,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:07:28,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2023-11-29 02:07:28,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239731334] [2023-11-29 02:07:28,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:07:28,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:07:28,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:07:28,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:07:28,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:07:28,993 INFO L87 Difference]: Start difference. First operand 270 states and 378 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-29 02:07:29,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:07:29,245 INFO L93 Difference]: Finished difference Result 540 states and 766 transitions. [2023-11-29 02:07:29,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:07:29,246 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2023-11-29 02:07:29,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:07:29,249 INFO L225 Difference]: With dead ends: 540 [2023-11-29 02:07:29,249 INFO L226 Difference]: Without dead ends: 283 [2023-11-29 02:07:29,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:07:29,251 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 9 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:07:29,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 541 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 02:07:29,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2023-11-29 02:07:29,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 274. [2023-11-29 02:07:29,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 188 states have (on average 1.2872340425531914) internal successors, (242), 194 states have internal predecessors, (242), 62 states have call successors, (62), 19 states have call predecessors, (62), 23 states have return successors, (78), 60 states have call predecessors, (78), 60 states have call successors, (78) [2023-11-29 02:07:29,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 382 transitions. [2023-11-29 02:07:29,276 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 382 transitions. Word has length 66 [2023-11-29 02:07:29,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:07:29,276 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 382 transitions. [2023-11-29 02:07:29,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-29 02:07:29,276 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 382 transitions. [2023-11-29 02:07:29,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-29 02:07:29,278 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:07:29,278 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-29 02:07:29,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-29 02:07:29,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:07:29,478 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:07:29,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:07:29,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1576903902, now seen corresponding path program 1 times [2023-11-29 02:07:29,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:07:29,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957771111] [2023-11-29 02:07:29,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:07:29,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:07:29,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:07:29,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:07:29,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:07:29,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:07:29,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:07:29,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:07:29,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:07:29,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 02:07:29,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:07:29,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-29 02:07:29,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:07:29,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-11-29 02:07:29,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:07:29,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-29 02:07:29,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:07:29,768 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 02:07:29,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:07:29,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957771111] [2023-11-29 02:07:29,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957771111] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:07:29,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123196852] [2023-11-29 02:07:29,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:07:29,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:07:29,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:07:29,770 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:07:29,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 02:07:30,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:07:30,170 INFO L262 TraceCheckSpWp]: Trace formula consists of 2485 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 02:07:30,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:07:30,179 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 02:07:30,180 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:07:30,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123196852] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:07:30,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:07:30,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2023-11-29 02:07:30,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244522097] [2023-11-29 02:07:30,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:07:30,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:07:30,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:07:30,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:07:30,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:07:30,181 INFO L87 Difference]: Start difference. First operand 274 states and 382 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-29 02:07:30,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:07:30,385 INFO L93 Difference]: Finished difference Result 569 states and 811 transitions. [2023-11-29 02:07:30,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:07:30,386 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2023-11-29 02:07:30,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:07:30,388 INFO L225 Difference]: With dead ends: 569 [2023-11-29 02:07:30,388 INFO L226 Difference]: Without dead ends: 308 [2023-11-29 02:07:30,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:07:30,390 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 28 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:07:30,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 555 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 02:07:30,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2023-11-29 02:07:30,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 274. [2023-11-29 02:07:30,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 188 states have (on average 1.2765957446808511) internal successors, (240), 194 states have internal predecessors, (240), 62 states have call successors, (62), 19 states have call predecessors, (62), 23 states have return successors, (78), 60 states have call predecessors, (78), 60 states have call successors, (78) [2023-11-29 02:07:30,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 380 transitions. [2023-11-29 02:07:30,407 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 380 transitions. Word has length 66 [2023-11-29 02:07:30,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:07:30,407 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 380 transitions. [2023-11-29 02:07:30,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-29 02:07:30,407 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 380 transitions. [2023-11-29 02:07:30,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-29 02:07:30,408 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:07:30,409 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-29 02:07:30,417 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 02:07:30,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 02:07:30,609 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:07:30,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:07:30,610 INFO L85 PathProgramCache]: Analyzing trace with hash -683417564, now seen corresponding path program 1 times [2023-11-29 02:07:30,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:07:30,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244981318] [2023-11-29 02:07:30,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:07:30,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:07:31,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:07:32,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:07:32,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:07:32,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:07:32,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:07:32,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:07:32,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:07:32,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 02:07:32,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:07:32,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-29 02:07:32,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:07:32,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-11-29 02:07:32,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:07:32,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-29 02:07:32,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:07:33,102 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 02:07:33,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:07:33,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244981318] [2023-11-29 02:07:33,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244981318] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:07:33,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850536126] [2023-11-29 02:07:33,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:07:33,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:07:33,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:07:33,104 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:07:33,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 02:07:33,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:07:33,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 2480 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-29 02:07:33,596 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:07:33,670 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 02:07:34,495 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:07:34,495 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:07:34,869 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 02:07:34,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850536126] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:07:34,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:07:34,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 30 [2023-11-29 02:07:34,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645144135] [2023-11-29 02:07:34,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:07:34,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-29 02:07:34,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:07:34,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-29 02:07:34,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2023-11-29 02:07:34,872 INFO L87 Difference]: Start difference. First operand 274 states and 380 transitions. Second operand has 30 states, 29 states have (on average 4.0) internal successors, (116), 28 states have internal predecessors, (116), 7 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2023-11-29 02:07:41,337 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 02:07:46,942 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:07:51,051 WARN L539 Checker$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 02:07:55,066 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:07:59,098 WARN L539 Checker$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 02:08:03,117 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:08:07,543 WARN L539 Checker$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 02:08:11,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:08:15,734 WARN L539 Checker$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 02:08:19,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:08:23,875 WARN L539 Checker$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 02:08:28,150 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 02:08:28,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:08:28,207 INFO L93 Difference]: Finished difference Result 345 states and 480 transitions. [2023-11-29 02:08:28,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 02:08:28,207 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 4.0) internal successors, (116), 28 states have internal predecessors, (116), 7 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 66 [2023-11-29 02:08:28,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:08:28,210 INFO L225 Difference]: With dead ends: 345 [2023-11-29 02:08:28,210 INFO L226 Difference]: Without dead ends: 321 [2023-11-29 02:08:28,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 125 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=373, Invalid=1883, Unknown=0, NotChecked=0, Total=2256 [2023-11-29 02:08:28,212 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 706 mSDsluCounter, 1407 mSDsCounter, 0 mSdLazyCounter, 3230 mSolverCounterSat, 180 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 732 SdHoareTripleChecker+Valid, 1557 SdHoareTripleChecker+Invalid, 3422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 3230 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.7s IncrementalHoareTripleChecker+Time [2023-11-29 02:08:28,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [732 Valid, 1557 Invalid, 3422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 3230 Invalid, 12 Unknown, 0 Unchecked, 52.7s Time] [2023-11-29 02:08:28,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2023-11-29 02:08:28,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 299. [2023-11-29 02:08:28,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 208 states have (on average 1.25) internal successors, (260), 216 states have internal predecessors, (260), 64 states have call successors, (64), 21 states have call predecessors, (64), 26 states have return successors, (93), 61 states have call predecessors, (93), 61 states have call successors, (93) [2023-11-29 02:08:28,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 417 transitions. [2023-11-29 02:08:28,251 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 417 transitions. Word has length 66 [2023-11-29 02:08:28,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:08:28,251 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 417 transitions. [2023-11-29 02:08:28,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 4.0) internal successors, (116), 28 states have internal predecessors, (116), 7 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2023-11-29 02:08:28,252 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 417 transitions. [2023-11-29 02:08:28,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-29 02:08:28,253 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:08:28,253 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-29 02:08:28,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-29 02:08:28,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:08:28,454 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:08:28,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:08:28,454 INFO L85 PathProgramCache]: Analyzing trace with hash 878299550, now seen corresponding path program 1 times [2023-11-29 02:08:28,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:08:28,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103797426] [2023-11-29 02:08:28,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:08:28,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:08:28,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:08:29,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:08:29,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:08:29,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:08:29,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:08:29,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:08:29,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:08:29,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 02:08:29,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:08:30,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-29 02:08:30,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:08:30,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-11-29 02:08:30,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:08:30,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-29 02:08:30,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:08:30,259 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 02:08:30,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:08:30,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103797426] [2023-11-29 02:08:30,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103797426] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:08:30,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750171836] [2023-11-29 02:08:30,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:08:30,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:08:30,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:08:30,261 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:08:30,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 02:08:30,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:08:30,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 2477 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-29 02:08:30,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:08:30,661 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 8 treesize of output 1 [2023-11-29 02:08:31,630 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:08:31,630 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:08:32,638 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 02:08:32,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750171836] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:08:32,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:08:32,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 12] total 32 [2023-11-29 02:08:32,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447839037] [2023-11-29 02:08:32,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:08:32,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-29 02:08:32,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:08:32,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-29 02:08:32,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2023-11-29 02:08:32,641 INFO L87 Difference]: Start difference. First operand 299 states and 417 transitions. Second operand has 32 states, 31 states have (on average 3.4193548387096775) internal successors, (106), 30 states have internal predecessors, (106), 7 states have call successors, (18), 5 states have call predecessors, (18), 7 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2023-11-29 02:08:43,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:08:43,443 INFO L93 Difference]: Finished difference Result 449 states and 617 transitions. [2023-11-29 02:08:43,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-29 02:08:43,444 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.4193548387096775) internal successors, (106), 30 states have internal predecessors, (106), 7 states have call successors, (18), 5 states have call predecessors, (18), 7 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 66 [2023-11-29 02:08:43,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:08:43,447 INFO L225 Difference]: With dead ends: 449 [2023-11-29 02:08:43,447 INFO L226 Difference]: Without dead ends: 426 [2023-11-29 02:08:43,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 122 SyntacticMatches, 5 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1096, Invalid=4306, Unknown=0, NotChecked=0, Total=5402 [2023-11-29 02:08:43,450 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 435 mSDsluCounter, 1507 mSDsCounter, 0 mSdLazyCounter, 4589 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 1658 SdHoareTripleChecker+Invalid, 4785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 4589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:08:43,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [465 Valid, 1658 Invalid, 4785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 4589 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2023-11-29 02:08:43,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2023-11-29 02:08:43,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 363. [2023-11-29 02:08:43,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 262 states have (on average 1.2366412213740459) internal successors, (324), 271 states have internal predecessors, (324), 69 states have call successors, (69), 25 states have call predecessors, (69), 31 states have return successors, (97), 66 states have call predecessors, (97), 66 states have call successors, (97) [2023-11-29 02:08:43,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 490 transitions. [2023-11-29 02:08:43,486 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 490 transitions. Word has length 66 [2023-11-29 02:08:43,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:08:43,487 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 490 transitions. [2023-11-29 02:08:43,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.4193548387096775) internal successors, (106), 30 states have internal predecessors, (106), 7 states have call successors, (18), 5 states have call predecessors, (18), 7 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2023-11-29 02:08:43,487 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 490 transitions. [2023-11-29 02:08:43,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-29 02:08:43,489 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:08:43,489 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-29 02:08:43,497 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 02:08:43,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 02:08:43,690 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:08:43,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:08:43,690 INFO L85 PathProgramCache]: Analyzing trace with hash -967067616, now seen corresponding path program 1 times [2023-11-29 02:08:43,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:08:43,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934519922] [2023-11-29 02:08:43,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:08:43,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:08:43,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:08:45,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:08:45,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:08:45,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:08:45,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:08:45,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:08:45,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:08:45,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 02:08:45,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:08:46,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-29 02:08:46,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:08:46,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-11-29 02:08:46,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:08:46,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-29 02:08:46,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:08:46,663 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 02:08:46,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:08:46,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934519922] [2023-11-29 02:08:46,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934519922] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:08:46,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760786598] [2023-11-29 02:08:46,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:08:46,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:08:46,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:08:46,667 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:08:46,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 02:08:47,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:08:47,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 2482 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-29 02:08:47,152 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:08:47,241 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 02:08:48,354 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:08:48,354 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:08:49,146 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 02:08:49,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760786598] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:08:49,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:08:49,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 11] total 34 [2023-11-29 02:08:49,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149670891] [2023-11-29 02:08:49,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:08:49,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-29 02:08:49,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:08:49,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-29 02:08:49,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 02:08:49,149 INFO L87 Difference]: Start difference. First operand 363 states and 490 transitions. Second operand has 34 states, 33 states have (on average 3.606060606060606) internal successors, (119), 32 states have internal predecessors, (119), 7 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2023-11-29 02:08:57,844 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 02:09:04,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:09:08,823 WARN L539 Checker$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 02:09:12,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:09:16,902 WARN L539 Checker$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 02:09:20,942 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:09:25,818 WARN L539 Checker$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 02:09:30,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:09:34,334 WARN L539 Checker$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 02:09:38,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:09:42,678 WARN L539 Checker$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 02:09:47,218 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 02:09:47,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:09:47,515 INFO L93 Difference]: Finished difference Result 425 states and 571 transitions. [2023-11-29 02:09:47,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-29 02:09:47,516 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.606060606060606) internal successors, (119), 32 states have internal predecessors, (119), 7 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 66 [2023-11-29 02:09:47,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:09:47,518 INFO L225 Difference]: With dead ends: 425 [2023-11-29 02:09:47,518 INFO L226 Difference]: Without dead ends: 413 [2023-11-29 02:09:47,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 123 SyntacticMatches, 6 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1091 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=687, Invalid=3095, Unknown=0, NotChecked=0, Total=3782 [2023-11-29 02:09:47,521 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 521 mSDsluCounter, 1696 mSDsCounter, 0 mSdLazyCounter, 4279 mSolverCounterSat, 188 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 56.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 1846 SdHoareTripleChecker+Invalid, 4479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 4279 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 56.8s IncrementalHoareTripleChecker+Time [2023-11-29 02:09:47,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [546 Valid, 1846 Invalid, 4479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 4279 Invalid, 12 Unknown, 0 Unchecked, 56.8s Time] [2023-11-29 02:09:47,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2023-11-29 02:09:47,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 370. [2023-11-29 02:09:47,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 269 states have (on average 1.2342007434944238) internal successors, (332), 278 states have internal predecessors, (332), 69 states have call successors, (69), 25 states have call predecessors, (69), 31 states have return successors, (96), 66 states have call predecessors, (96), 66 states have call successors, (96) [2023-11-29 02:09:47,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 497 transitions. [2023-11-29 02:09:47,559 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 497 transitions. Word has length 66 [2023-11-29 02:09:47,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:09:47,559 INFO L495 AbstractCegarLoop]: Abstraction has 370 states and 497 transitions. [2023-11-29 02:09:47,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.606060606060606) internal successors, (119), 32 states have internal predecessors, (119), 7 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2023-11-29 02:09:47,560 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 497 transitions. [2023-11-29 02:09:47,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-29 02:09:47,561 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:09:47,561 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-29 02:09:47,569 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 02:09:47,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 02:09:47,762 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:09:47,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:09:47,763 INFO L85 PathProgramCache]: Analyzing trace with hash -266003038, now seen corresponding path program 1 times [2023-11-29 02:09:47,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:09:47,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015478036] [2023-11-29 02:09:47,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:09:47,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:09:47,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:09:48,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:09:48,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:09:48,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:09:48,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:09:48,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:09:48,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:09:48,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 02:09:48,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:09:48,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-29 02:09:48,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:09:48,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-11-29 02:09:48,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:09:48,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-29 02:09:48,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:09:48,360 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 02:09:48,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:09:48,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015478036] [2023-11-29 02:09:48,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015478036] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:09:48,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:09:48,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 02:09:48,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114286967] [2023-11-29 02:09:48,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:09:48,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 02:09:48,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:09:48,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 02:09:48,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:09:48,362 INFO L87 Difference]: Start difference. First operand 370 states and 497 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-29 02:09:49,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:09:49,318 INFO L93 Difference]: Finished difference Result 706 states and 963 transitions. [2023-11-29 02:09:49,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 02:09:49,319 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 66 [2023-11-29 02:09:49,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:09:49,322 INFO L225 Difference]: With dead ends: 706 [2023-11-29 02:09:49,322 INFO L226 Difference]: Without dead ends: 384 [2023-11-29 02:09:49,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-11-29 02:09:49,324 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 138 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 02:09:49,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 416 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 02:09:49,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2023-11-29 02:09:49,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 362. [2023-11-29 02:09:49,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 262 states have (on average 1.2251908396946565) internal successors, (321), 270 states have internal predecessors, (321), 69 states have call successors, (69), 25 states have call predecessors, (69), 30 states have return successors, (95), 66 states have call predecessors, (95), 66 states have call successors, (95) [2023-11-29 02:09:49,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 485 transitions. [2023-11-29 02:09:49,363 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 485 transitions. Word has length 66 [2023-11-29 02:09:49,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:09:49,364 INFO L495 AbstractCegarLoop]: Abstraction has 362 states and 485 transitions. [2023-11-29 02:09:49,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-29 02:09:49,364 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 485 transitions. [2023-11-29 02:09:49,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-29 02:09:49,365 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:09:49,365 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-29 02:09:49,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-29 02:09:49,365 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:09:49,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:09:49,366 INFO L85 PathProgramCache]: Analyzing trace with hash -2104045123, now seen corresponding path program 1 times [2023-11-29 02:09:49,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:09:49,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773981983] [2023-11-29 02:09:49,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:09:49,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:09:49,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:09:49,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:09:49,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:09:49,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:09:49,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:09:49,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:09:49,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:09:49,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 02:09:49,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:09:49,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-29 02:09:49,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:09:49,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 02:09:49,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:09:50,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-11-29 02:09:50,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:09:50,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:09:50,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:09:50,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2023-11-29 02:09:50,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:09:50,085 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 02:09:50,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:09:50,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773981983] [2023-11-29 02:09:50,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773981983] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:09:50,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552199955] [2023-11-29 02:09:50,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:09:50,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:09:50,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:09:50,088 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:09:50,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 02:09:50,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:09:50,533 INFO L262 TraceCheckSpWp]: Trace formula consists of 2568 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 02:09:50,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:09:50,615 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 02:09:50,615 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:09:50,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552199955] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:09:50,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:09:50,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 16 [2023-11-29 02:09:50,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107712603] [2023-11-29 02:09:50,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:09:50,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:09:50,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:09:50,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:09:50,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2023-11-29 02:09:50,617 INFO L87 Difference]: Start difference. First operand 362 states and 485 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2023-11-29 02:09:51,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:09:51,020 INFO L93 Difference]: Finished difference Result 676 states and 908 transitions. [2023-11-29 02:09:51,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 02:09:51,021 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 69 [2023-11-29 02:09:51,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:09:51,023 INFO L225 Difference]: With dead ends: 676 [2023-11-29 02:09:51,023 INFO L226 Difference]: Without dead ends: 366 [2023-11-29 02:09:51,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-11-29 02:09:51,025 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 114 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:09:51,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 543 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 02:09:51,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2023-11-29 02:09:51,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 366. [2023-11-29 02:09:51,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 264 states have (on average 1.2196969696969697) internal successors, (322), 274 states have internal predecessors, (322), 69 states have call successors, (69), 25 states have call predecessors, (69), 32 states have return successors, (102), 66 states have call predecessors, (102), 66 states have call successors, (102) [2023-11-29 02:09:51,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 493 transitions. [2023-11-29 02:09:51,086 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 493 transitions. Word has length 69 [2023-11-29 02:09:51,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:09:51,087 INFO L495 AbstractCegarLoop]: Abstraction has 366 states and 493 transitions. [2023-11-29 02:09:51,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2023-11-29 02:09:51,087 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 493 transitions. [2023-11-29 02:09:51,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-29 02:09:51,088 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:09:51,088 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:09:51,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 02:09:51,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 02:09:51,289 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:09:51,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:09:51,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1165912185, now seen corresponding path program 1 times [2023-11-29 02:09:51,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:09:51,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943678285] [2023-11-29 02:09:51,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:09:51,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:09:51,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:09:51,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:09:51,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:09:51,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:09:51,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:09:51,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:09:51,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:09:51,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 02:09:51,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:09:51,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-29 02:09:51,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:09:51,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-11-29 02:09:51,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:09:51,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-29 02:09:51,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:09:52,005 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 02:09:52,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:09:52,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943678285] [2023-11-29 02:09:52,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943678285] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:09:52,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:09:52,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-29 02:09:52,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536860715] [2023-11-29 02:09:52,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:09:52,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 02:09:52,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:09:52,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 02:09:52,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2023-11-29 02:09:52,007 INFO L87 Difference]: Start difference. First operand 366 states and 493 transitions. Second operand has 12 states, 10 states have (on average 4.0) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-29 02:09:53,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:09:53,291 INFO L93 Difference]: Finished difference Result 392 states and 523 transitions. [2023-11-29 02:09:53,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 02:09:53,292 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 4.0) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 68 [2023-11-29 02:09:53,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:09:53,294 INFO L225 Difference]: With dead ends: 392 [2023-11-29 02:09:53,294 INFO L226 Difference]: Without dead ends: 364 [2023-11-29 02:09:53,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2023-11-29 02:09:53,296 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 151 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 976 SdHoareTripleChecker+Invalid, 1146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:09:53,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 976 Invalid, 1146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1056 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 02:09:53,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2023-11-29 02:09:53,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 347. [2023-11-29 02:09:53,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 249 states have (on average 1.2248995983935742) internal successors, (305), 258 states have internal predecessors, (305), 66 states have call successors, (66), 24 states have call predecessors, (66), 31 states have return successors, (92), 64 states have call predecessors, (92), 63 states have call successors, (92) [2023-11-29 02:09:53,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 463 transitions. [2023-11-29 02:09:53,352 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 463 transitions. Word has length 68 [2023-11-29 02:09:53,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:09:53,352 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 463 transitions. [2023-11-29 02:09:53,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 4.0) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-29 02:09:53,352 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 463 transitions. [2023-11-29 02:09:53,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-29 02:09:53,353 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:09:53,353 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:09:53,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-29 02:09:53,354 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:09:53,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:09:53,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1196531897, now seen corresponding path program 1 times [2023-11-29 02:09:53,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:09:53,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952170884] [2023-11-29 02:09:53,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:09:53,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:09:53,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:09:55,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:09:55,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:09:55,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:09:55,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:09:55,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:09:55,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:09:55,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 02:09:55,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:09:55,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-29 02:09:55,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:09:55,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-11-29 02:09:55,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:09:55,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-29 02:09:55,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:09:55,938 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 02:09:55,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:09:55,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952170884] [2023-11-29 02:09:55,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952170884] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:09:55,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720578875] [2023-11-29 02:09:55,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:09:55,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:09:55,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:09:55,940 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:09:55,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 02:09:56,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:09:56,311 INFO L262 TraceCheckSpWp]: Trace formula consists of 2492 conjuncts, 61 conjunts are in the unsatisfiable core [2023-11-29 02:09:56,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:09:56,426 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 02:09:57,731 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-29 02:09:57,731 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:09:57,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720578875] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:09:57,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:09:57,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [23] total 38 [2023-11-29 02:09:57,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214732840] [2023-11-29 02:09:57,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:09:57,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 02:09:57,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:09:57,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 02:09:57,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1306, Unknown=0, NotChecked=0, Total=1406 [2023-11-29 02:09:57,733 INFO L87 Difference]: Start difference. First operand 347 states and 463 transitions. Second operand has 19 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 5 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-29 02:10:06,120 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 02:10:11,155 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:10:15,182 WARN L539 Checker$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 02:10:19,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:10:23,240 WARN L539 Checker$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 02:10:27,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:10:31,600 WARN L539 Checker$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 02:10:35,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:10:39,768 WARN L539 Checker$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 02:10:43,883 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 02:10:43,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:10:43,928 INFO L93 Difference]: Finished difference Result 368 states and 487 transitions. [2023-11-29 02:10:43,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 02:10:43,929 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 5 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) Word has length 68 [2023-11-29 02:10:43,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:10:43,931 INFO L225 Difference]: With dead ends: 368 [2023-11-29 02:10:43,931 INFO L226 Difference]: Without dead ends: 344 [2023-11-29 02:10:43,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 58 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=193, Invalid=2357, Unknown=0, NotChecked=0, Total=2550 [2023-11-29 02:10:43,933 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 171 mSDsluCounter, 3135 mSDsCounter, 0 mSdLazyCounter, 1859 mSolverCounterSat, 16 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 3383 SdHoareTripleChecker+Invalid, 1885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1859 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.7s IncrementalHoareTripleChecker+Time [2023-11-29 02:10:43,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 3383 Invalid, 1885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1859 Invalid, 10 Unknown, 0 Unchecked, 45.7s Time] [2023-11-29 02:10:43,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2023-11-29 02:10:43,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 327. [2023-11-29 02:10:43,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 233 states have (on average 1.2317596566523605) internal successors, (287), 243 states have internal predecessors, (287), 63 states have call successors, (63), 22 states have call predecessors, (63), 30 states have return successors, (89), 61 states have call predecessors, (89), 60 states have call successors, (89) [2023-11-29 02:10:43,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 439 transitions. [2023-11-29 02:10:43,967 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 439 transitions. Word has length 68 [2023-11-29 02:10:43,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:10:43,967 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 439 transitions. [2023-11-29 02:10:43,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 5 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-29 02:10:43,967 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 439 transitions. [2023-11-29 02:10:43,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-11-29 02:10:43,968 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:10:43,968 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-29 02:10:43,976 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 02:10:44,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 02:10:44,169 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:10:44,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:10:44,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1563645037, now seen corresponding path program 1 times [2023-11-29 02:10:44,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:10:44,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942939082] [2023-11-29 02:10:44,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:10:44,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:10:44,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:44,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:10:44,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:44,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:10:44,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:44,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:10:44,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:44,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 02:10:44,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:44,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-29 02:10:44,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:44,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 02:10:44,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:44,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 02:10:44,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:44,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:10:44,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:44,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-11-29 02:10:44,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:44,499 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-29 02:10:44,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:10:44,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942939082] [2023-11-29 02:10:44,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942939082] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:10:44,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:10:44,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-29 02:10:44,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067966424] [2023-11-29 02:10:44,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:10:44,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 02:10:44,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:10:44,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 02:10:44,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-11-29 02:10:44,501 INFO L87 Difference]: Start difference. First operand 327 states and 439 transitions. Second operand has 10 states, 9 states have (on average 5.666666666666667) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2023-11-29 02:10:45,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:10:45,933 INFO L93 Difference]: Finished difference Result 448 states and 581 transitions. [2023-11-29 02:10:45,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 02:10:45,933 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.666666666666667) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 79 [2023-11-29 02:10:45,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:10:45,936 INFO L225 Difference]: With dead ends: 448 [2023-11-29 02:10:45,936 INFO L226 Difference]: Without dead ends: 351 [2023-11-29 02:10:45,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-11-29 02:10:45,937 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 74 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:10:45,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 652 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 02:10:45,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2023-11-29 02:10:45,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 329. [2023-11-29 02:10:45,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 235 states have (on average 1.2297872340425533) internal successors, (289), 245 states have internal predecessors, (289), 63 states have call successors, (63), 22 states have call predecessors, (63), 30 states have return successors, (89), 61 states have call predecessors, (89), 60 states have call successors, (89) [2023-11-29 02:10:45,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 441 transitions. [2023-11-29 02:10:45,972 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 441 transitions. Word has length 79 [2023-11-29 02:10:45,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:10:45,973 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 441 transitions. [2023-11-29 02:10:45,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.666666666666667) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2023-11-29 02:10:45,973 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 441 transitions. [2023-11-29 02:10:45,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-11-29 02:10:45,974 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:10:45,974 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-29 02:10:45,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-29 02:10:45,975 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:10:45,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:10:45,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1889475239, now seen corresponding path program 1 times [2023-11-29 02:10:45,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:10:45,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995357077] [2023-11-29 02:10:45,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:10:45,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:10:46,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:46,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:10:46,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:46,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:10:46,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:46,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:10:46,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:46,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 02:10:46,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:46,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-29 02:10:46,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:46,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 02:10:46,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:46,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 02:10:46,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:46,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:10:46,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:46,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-11-29 02:10:46,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:46,287 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-29 02:10:46,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:10:46,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995357077] [2023-11-29 02:10:46,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995357077] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:10:46,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:10:46,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 02:10:46,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526250943] [2023-11-29 02:10:46,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:10:46,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 02:10:46,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:10:46,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 02:10:46,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:10:46,289 INFO L87 Difference]: Start difference. First operand 329 states and 441 transitions. Second operand has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 02:10:47,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:10:47,036 INFO L93 Difference]: Finished difference Result 384 states and 500 transitions. [2023-11-29 02:10:47,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 02:10:47,036 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 81 [2023-11-29 02:10:47,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:10:47,038 INFO L225 Difference]: With dead ends: 384 [2023-11-29 02:10:47,038 INFO L226 Difference]: Without dead ends: 334 [2023-11-29 02:10:47,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-29 02:10:47,039 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 102 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 02:10:47,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 435 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 02:10:47,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2023-11-29 02:10:47,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 324. [2023-11-29 02:10:47,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 233 states have (on average 1.2274678111587982) internal successors, (286), 242 states have internal predecessors, (286), 61 states have call successors, (61), 22 states have call predecessors, (61), 29 states have return successors, (81), 59 states have call predecessors, (81), 58 states have call successors, (81) [2023-11-29 02:10:47,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 428 transitions. [2023-11-29 02:10:47,083 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 428 transitions. Word has length 81 [2023-11-29 02:10:47,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:10:47,084 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 428 transitions. [2023-11-29 02:10:47,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 02:10:47,084 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 428 transitions. [2023-11-29 02:10:47,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-11-29 02:10:47,085 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:10:47,085 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-29 02:10:47,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-29 02:10:47,086 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:10:47,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:10:47,086 INFO L85 PathProgramCache]: Analyzing trace with hash 432545499, now seen corresponding path program 1 times [2023-11-29 02:10:47,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:10:47,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474019861] [2023-11-29 02:10:47,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:10:47,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:10:47,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:47,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:10:47,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:47,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:10:47,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:47,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:10:47,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:47,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 02:10:47,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:47,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-29 02:10:47,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:47,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 02:10:47,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:47,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 02:10:47,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:47,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:10:47,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:47,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 02:10:47,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:47,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-29 02:10:47,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:47,659 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-29 02:10:47,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:10:47,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474019861] [2023-11-29 02:10:47,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474019861] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:10:47,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:10:47,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-29 02:10:47,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758852299] [2023-11-29 02:10:47,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:10:47,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 02:10:47,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:10:47,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 02:10:47,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-11-29 02:10:47,661 INFO L87 Difference]: Start difference. First operand 324 states and 428 transitions. Second operand has 11 states, 9 states have (on average 5.444444444444445) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2023-11-29 02:10:48,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:10:48,958 INFO L93 Difference]: Finished difference Result 349 states and 460 transitions. [2023-11-29 02:10:48,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 02:10:48,959 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 5.444444444444445) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 85 [2023-11-29 02:10:48,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:10:48,962 INFO L225 Difference]: With dead ends: 349 [2023-11-29 02:10:48,962 INFO L226 Difference]: Without dead ends: 347 [2023-11-29 02:10:48,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2023-11-29 02:10:48,963 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 141 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:10:48,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 735 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-29 02:10:48,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2023-11-29 02:10:48,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 332. [2023-11-29 02:10:48,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 238 states have (on average 1.2226890756302522) internal successors, (291), 248 states have internal predecessors, (291), 62 states have call successors, (62), 23 states have call predecessors, (62), 31 states have return successors, (87), 60 states have call predecessors, (87), 59 states have call successors, (87) [2023-11-29 02:10:49,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 440 transitions. [2023-11-29 02:10:49,001 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 440 transitions. Word has length 85 [2023-11-29 02:10:49,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:10:49,001 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 440 transitions. [2023-11-29 02:10:49,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 5.444444444444445) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2023-11-29 02:10:49,001 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 440 transitions. [2023-11-29 02:10:49,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-29 02:10:49,002 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:10:49,002 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-29 02:10:49,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-29 02:10:49,003 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:10:49,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:10:49,003 INFO L85 PathProgramCache]: Analyzing trace with hash 804361931, now seen corresponding path program 1 times [2023-11-29 02:10:49,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:10:49,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035589102] [2023-11-29 02:10:49,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:10:49,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:10:49,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:49,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:10:49,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:49,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:10:49,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:49,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:10:49,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:49,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 02:10:49,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:49,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-29 02:10:49,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:49,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 02:10:49,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:49,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 02:10:49,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:49,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:10:49,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:49,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-11-29 02:10:49,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:49,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-11-29 02:10:49,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:49,736 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 02:10:49,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:10:49,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035589102] [2023-11-29 02:10:49,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035589102] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:10:49,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811045357] [2023-11-29 02:10:49,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:10:49,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:10:49,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:10:49,738 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:10:49,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 02:10:50,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:50,142 INFO L262 TraceCheckSpWp]: Trace formula consists of 2643 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:10:50,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:10:50,220 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-29 02:10:50,220 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:10:50,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811045357] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:10:50,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:10:50,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14] total 19 [2023-11-29 02:10:50,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064107785] [2023-11-29 02:10:50,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:10:50,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 02:10:50,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:10:50,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 02:10:50,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2023-11-29 02:10:50,222 INFO L87 Difference]: Start difference. First operand 332 states and 440 transitions. Second operand has 7 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2023-11-29 02:10:50,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:10:50,596 INFO L93 Difference]: Finished difference Result 451 states and 578 transitions. [2023-11-29 02:10:50,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 02:10:50,596 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 86 [2023-11-29 02:10:50,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:10:50,599 INFO L225 Difference]: With dead ends: 451 [2023-11-29 02:10:50,599 INFO L226 Difference]: Without dead ends: 353 [2023-11-29 02:10:50,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2023-11-29 02:10:50,600 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 9 mSDsluCounter, 872 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1050 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:10:50,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1050 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 02:10:50,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2023-11-29 02:10:50,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 332. [2023-11-29 02:10:50,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 238 states have (on average 1.2226890756302522) internal successors, (291), 248 states have internal predecessors, (291), 62 states have call successors, (62), 23 states have call predecessors, (62), 31 states have return successors, (87), 60 states have call predecessors, (87), 59 states have call successors, (87) [2023-11-29 02:10:50,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 440 transitions. [2023-11-29 02:10:50,637 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 440 transitions. Word has length 86 [2023-11-29 02:10:50,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:10:50,638 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 440 transitions. [2023-11-29 02:10:50,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2023-11-29 02:10:50,638 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 440 transitions. [2023-11-29 02:10:50,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-29 02:10:50,639 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:10:50,639 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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] [2023-11-29 02:10:50,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 02:10:50,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-29 02:10:50,840 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:10:50,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:10:50,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1843537205, now seen corresponding path program 1 times [2023-11-29 02:10:50,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:10:50,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692375712] [2023-11-29 02:10:50,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:10:50,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:10:50,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:51,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:10:51,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:51,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:10:51,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:51,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:10:51,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:51,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 02:10:51,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:51,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-29 02:10:51,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:51,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 02:10:51,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:51,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 02:10:51,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:51,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:10:51,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:51,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-11-29 02:10:51,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:51,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2023-11-29 02:10:51,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:51,633 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-29 02:10:51,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:10:51,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692375712] [2023-11-29 02:10:51,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692375712] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:10:51,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601774387] [2023-11-29 02:10:51,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:10:51,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:10:51,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:10:51,635 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:10:51,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 02:10:52,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:52,129 INFO L262 TraceCheckSpWp]: Trace formula consists of 2627 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 02:10:52,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:10:52,257 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-29 02:10:52,257 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:10:52,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601774387] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:10:52,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:10:52,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [13] total 18 [2023-11-29 02:10:52,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603190289] [2023-11-29 02:10:52,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:10:52,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 02:10:52,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:10:52,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 02:10:52,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2023-11-29 02:10:52,260 INFO L87 Difference]: Start difference. First operand 332 states and 440 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2023-11-29 02:10:52,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:10:52,698 INFO L93 Difference]: Finished difference Result 566 states and 751 transitions. [2023-11-29 02:10:52,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 02:10:52,699 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 87 [2023-11-29 02:10:52,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:10:52,701 INFO L225 Difference]: With dead ends: 566 [2023-11-29 02:10:52,701 INFO L226 Difference]: Without dead ends: 330 [2023-11-29 02:10:52,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2023-11-29 02:10:52,702 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 129 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:10:52,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 645 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 02:10:52,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2023-11-29 02:10:52,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 330. [2023-11-29 02:10:52,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 237 states have (on average 1.2151898734177216) internal successors, (288), 246 states have internal predecessors, (288), 62 states have call successors, (62), 23 states have call predecessors, (62), 30 states have return successors, (84), 60 states have call predecessors, (84), 59 states have call successors, (84) [2023-11-29 02:10:52,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 434 transitions. [2023-11-29 02:10:52,736 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 434 transitions. Word has length 87 [2023-11-29 02:10:52,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:10:52,737 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 434 transitions. [2023-11-29 02:10:52,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2023-11-29 02:10:52,737 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 434 transitions. [2023-11-29 02:10:52,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-29 02:10:52,738 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:10:52,738 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2023-11-29 02:10:52,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 02:10:52,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:10:52,939 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:10:52,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:10:52,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1831437675, now seen corresponding path program 1 times [2023-11-29 02:10:52,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:10:52,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749875043] [2023-11-29 02:10:52,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:10:52,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:10:53,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:54,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:10:54,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:54,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:10:54,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:54,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:10:54,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:54,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 02:10:54,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:54,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-29 02:10:54,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:54,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 02:10:54,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:54,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 02:10:54,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:54,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:10:54,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:54,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 02:10:54,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:54,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-29 02:10:54,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:54,556 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 02:10:54,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:10:54,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749875043] [2023-11-29 02:10:54,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749875043] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:10:54,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727104625] [2023-11-29 02:10:54,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:10:54,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:10:54,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:10:54,558 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:10:54,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 02:10:54,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:54,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 2608 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-29 02:10:54,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:10:55,036 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 02:10:55,041 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 02:10:55,200 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 23 treesize of output 11 [2023-11-29 02:10:55,206 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 23 treesize of output 11 [2023-11-29 02:10:55,504 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-29 02:10:55,504 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:10:55,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727104625] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:10:55,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:10:55,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [16] total 23 [2023-11-29 02:10:55,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755490451] [2023-11-29 02:10:55,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:10:55,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 02:10:55,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:10:55,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 02:10:55,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2023-11-29 02:10:55,506 INFO L87 Difference]: Start difference. First operand 330 states and 434 transitions. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2023-11-29 02:10:56,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:10:56,921 INFO L93 Difference]: Finished difference Result 691 states and 898 transitions. [2023-11-29 02:10:56,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 02:10:56,922 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 89 [2023-11-29 02:10:56,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:10:56,924 INFO L225 Difference]: With dead ends: 691 [2023-11-29 02:10:56,924 INFO L226 Difference]: Without dead ends: 330 [2023-11-29 02:10:56,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 93 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2023-11-29 02:10:56,925 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 12 mSDsluCounter, 919 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 1086 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:10:56,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 1086 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 02:10:56,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2023-11-29 02:10:56,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 330. [2023-11-29 02:10:56,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 237 states have (on average 1.2109704641350212) internal successors, (287), 246 states have internal predecessors, (287), 62 states have call successors, (62), 23 states have call predecessors, (62), 30 states have return successors, (84), 60 states have call predecessors, (84), 59 states have call successors, (84) [2023-11-29 02:10:56,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 433 transitions. [2023-11-29 02:10:56,961 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 433 transitions. Word has length 89 [2023-11-29 02:10:56,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:10:56,961 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 433 transitions. [2023-11-29 02:10:56,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2023-11-29 02:10:56,961 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 433 transitions. [2023-11-29 02:10:56,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-29 02:10:56,962 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:10:56,962 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2023-11-29 02:10:56,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 02:10:57,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:10:57,163 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:10:57,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:10:57,164 INFO L85 PathProgramCache]: Analyzing trace with hash 85859888, now seen corresponding path program 1 times [2023-11-29 02:10:57,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:10:57,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890384828] [2023-11-29 02:10:57,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:10:57,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:10:57,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:58,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:10:58,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:58,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 02:10:58,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:58,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 02:10:58,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:58,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:10:58,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:58,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 02:10:58,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:58,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-11-29 02:10:58,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:58,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-29 02:10:58,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:58,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2023-11-29 02:10:58,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:58,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:10:58,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:58,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 02:10:58,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:58,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2023-11-29 02:10:58,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:59,017 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 02:10:59,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:10:59,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890384828] [2023-11-29 02:10:59,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890384828] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:10:59,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627756913] [2023-11-29 02:10:59,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:10:59,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:10:59,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:10:59,020 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:10:59,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 02:10:59,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:59,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 2620 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-29 02:10:59,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:10:59,608 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 02:11:00,398 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:11:00,398 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:11:00,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627756913] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:11:00,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:11:00,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2023-11-29 02:11:00,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924770948] [2023-11-29 02:11:00,709 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:11:00,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 02:11:00,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:11:00,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 02:11:00,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 02:11:00,712 INFO L87 Difference]: Start difference. First operand 330 states and 433 transitions. Second operand has 28 states, 27 states have (on average 4.592592592592593) internal successors, (124), 24 states have internal predecessors, (124), 11 states have call successors, (21), 7 states have call predecessors, (21), 8 states have return successors, (21), 9 states have call predecessors, (21), 10 states have call successors, (21) [2023-11-29 02:11:09,959 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 02:11:17,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:11:21,248 WARN L539 Checker$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 02:11:25,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:11:29,337 WARN L539 Checker$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 02:11:33,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:11:37,897 WARN L539 Checker$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 02:11:42,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:11:46,377 WARN L539 Checker$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 02:11:50,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:11:54,724 WARN L539 Checker$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 02:11:59,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:12:03,175 WARN L539 Checker$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 02:12:07,636 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:12:11,660 WARN L539 Checker$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 02:12:15,735 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 02:12:15,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:12:15,773 INFO L93 Difference]: Finished difference Result 763 states and 1035 transitions. [2023-11-29 02:12:15,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-11-29 02:12:15,774 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 4.592592592592593) internal successors, (124), 24 states have internal predecessors, (124), 11 states have call successors, (21), 7 states have call predecessors, (21), 8 states have return successors, (21), 9 states have call predecessors, (21), 10 states have call successors, (21) Word has length 93 [2023-11-29 02:12:15,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:12:15,776 INFO L225 Difference]: With dead ends: 763 [2023-11-29 02:12:15,776 INFO L226 Difference]: Without dead ends: 458 [2023-11-29 02:12:15,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 134 SyntacticMatches, 4 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2075 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1267, Invalid=5986, Unknown=57, NotChecked=0, Total=7310 [2023-11-29 02:12:15,781 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 778 mSDsluCounter, 1569 mSDsCounter, 0 mSdLazyCounter, 4006 mSolverCounterSat, 405 mSolverCounterUnsat, 26 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 71.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 790 SdHoareTripleChecker+Valid, 1701 SdHoareTripleChecker+Invalid, 4437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 405 IncrementalHoareTripleChecker+Valid, 4006 IncrementalHoareTripleChecker+Invalid, 26 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 71.8s IncrementalHoareTripleChecker+Time [2023-11-29 02:12:15,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [790 Valid, 1701 Invalid, 4437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [405 Valid, 4006 Invalid, 26 Unknown, 0 Unchecked, 71.8s Time] [2023-11-29 02:12:15,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2023-11-29 02:12:15,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 356. [2023-11-29 02:12:15,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 258 states have (on average 1.197674418604651) internal successors, (309), 268 states have internal predecessors, (309), 64 states have call successors, (64), 25 states have call predecessors, (64), 33 states have return successors, (92), 62 states have call predecessors, (92), 61 states have call successors, (92) [2023-11-29 02:12:15,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 465 transitions. [2023-11-29 02:12:15,865 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 465 transitions. Word has length 93 [2023-11-29 02:12:15,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:12:15,865 INFO L495 AbstractCegarLoop]: Abstraction has 356 states and 465 transitions. [2023-11-29 02:12:15,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 4.592592592592593) internal successors, (124), 24 states have internal predecessors, (124), 11 states have call successors, (21), 7 states have call predecessors, (21), 8 states have return successors, (21), 9 states have call predecessors, (21), 10 states have call successors, (21) [2023-11-29 02:12:15,866 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 465 transitions. [2023-11-29 02:12:15,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-29 02:12:15,867 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:12:15,867 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-29 02:12:15,875 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 02:12:16,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 02:12:16,068 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:12:16,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:12:16,068 INFO L85 PathProgramCache]: Analyzing trace with hash -153664346, now seen corresponding path program 1 times [2023-11-29 02:12:16,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:12:16,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091415694] [2023-11-29 02:12:16,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:12:16,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:12:16,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:12:16,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:12:16,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:12:16,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 02:12:16,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:12:16,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 02:12:16,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:12:16,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:12:16,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:12:16,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 02:12:16,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:12:16,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-11-29 02:12:16,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:12:16,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-29 02:12:16,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:12:16,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2023-11-29 02:12:16,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:12:16,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:12:16,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:12:16,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 02:12:16,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:12:16,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2023-11-29 02:12:16,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:12:16,320 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-29 02:12:16,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:12:16,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091415694] [2023-11-29 02:12:16,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091415694] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:12:16,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489817566] [2023-11-29 02:12:16,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:12:16,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:12:16,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:12:16,321 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:12:16,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 02:12:16,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:12:16,731 INFO L262 TraceCheckSpWp]: Trace formula consists of 2609 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 02:12:16,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:12:16,740 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 02:12:16,740 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:12:16,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489817566] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:12:16,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:12:16,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2023-11-29 02:12:16,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093627468] [2023-11-29 02:12:16,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:12:16,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:12:16,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:12:16,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:12:16,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:12:16,743 INFO L87 Difference]: Start difference. First operand 356 states and 465 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-29 02:12:17,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:12:17,016 INFO L93 Difference]: Finished difference Result 635 states and 838 transitions. [2023-11-29 02:12:17,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:12:17,017 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 93 [2023-11-29 02:12:17,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:12:17,018 INFO L225 Difference]: With dead ends: 635 [2023-11-29 02:12:17,018 INFO L226 Difference]: Without dead ends: 340 [2023-11-29 02:12:17,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-29 02:12:17,020 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 23 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:12:17,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 499 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 02:12:17,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2023-11-29 02:12:17,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 326. [2023-11-29 02:12:17,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 235 states have (on average 1.1872340425531915) internal successors, (279), 243 states have internal predecessors, (279), 61 states have call successors, (61), 23 states have call predecessors, (61), 29 states have return successors, (81), 59 states have call predecessors, (81), 58 states have call successors, (81) [2023-11-29 02:12:17,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 421 transitions. [2023-11-29 02:12:17,090 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 421 transitions. Word has length 93 [2023-11-29 02:12:17,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:12:17,090 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 421 transitions. [2023-11-29 02:12:17,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-29 02:12:17,090 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 421 transitions. [2023-11-29 02:12:17,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-11-29 02:12:17,092 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:12:17,092 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-29 02:12:17,102 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 02:12:17,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:12:17,293 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:12:17,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:12:17,293 INFO L85 PathProgramCache]: Analyzing trace with hash -463147426, now seen corresponding path program 1 times [2023-11-29 02:12:17,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:12:17,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334877213] [2023-11-29 02:12:17,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:12:17,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:12:17,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:12:17,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:12:17,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:12:17,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 02:12:17,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:12:17,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 02:12:17,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:12:17,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:12:17,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:12:17,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 02:12:17,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:12:17,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-11-29 02:12:17,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:12:17,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-29 02:12:17,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:12:17,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2023-11-29 02:12:17,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:12:17,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:12:17,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:12:17,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 02:12:17,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:12:17,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2023-11-29 02:12:17,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:12:17,924 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-29 02:12:17,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:12:17,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334877213] [2023-11-29 02:12:17,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334877213] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:12:17,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273824011] [2023-11-29 02:12:17,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:12:17,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:12:17,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:12:17,925 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:12:17,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 02:12:18,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:12:18,406 INFO L262 TraceCheckSpWp]: Trace formula consists of 2621 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-29 02:12:18,409 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:12:19,349 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 26 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:12:19,349 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:12:51,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273824011] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:12:51,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:12:51,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16] total 24 [2023-11-29 02:12:51,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411528609] [2023-11-29 02:12:51,302 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:12:51,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 02:12:51,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:12:51,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 02:12:51,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=883, Unknown=6, NotChecked=0, Total=992 [2023-11-29 02:12:51,305 INFO L87 Difference]: Start difference. First operand 326 states and 421 transitions. Second operand has 24 states, 23 states have (on average 5.0) internal successors, (115), 19 states have internal predecessors, (115), 6 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2023-11-29 02:13:01,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:13:01,654 INFO L93 Difference]: Finished difference Result 696 states and 936 transitions. [2023-11-29 02:13:01,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-29 02:13:01,655 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 5.0) internal successors, (115), 19 states have internal predecessors, (115), 6 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) Word has length 97 [2023-11-29 02:13:01,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:13:01,658 INFO L225 Difference]: With dead ends: 696 [2023-11-29 02:13:01,658 INFO L226 Difference]: Without dead ends: 408 [2023-11-29 02:13:01,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 128 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 34.8s TimeCoverageRelationStatistics Valid=1068, Invalid=4476, Unknown=6, NotChecked=0, Total=5550 [2023-11-29 02:13:01,662 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 601 mSDsluCounter, 1611 mSDsCounter, 0 mSdLazyCounter, 3767 mSolverCounterSat, 307 mSolverCounterUnsat, 16 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 636 SdHoareTripleChecker+Valid, 1751 SdHoareTripleChecker+Invalid, 4090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 3767 IncrementalHoareTripleChecker+Invalid, 16 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2023-11-29 02:13:01,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [636 Valid, 1751 Invalid, 4090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 3767 Invalid, 16 Unknown, 0 Unchecked, 7.6s Time] [2023-11-29 02:13:01,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2023-11-29 02:13:01,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 377. [2023-11-29 02:13:01,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 271 states have (on average 1.1808118081180812) internal successors, (320), 279 states have internal predecessors, (320), 77 states have call successors, (77), 24 states have call predecessors, (77), 28 states have return successors, (100), 73 states have call predecessors, (100), 71 states have call successors, (100) [2023-11-29 02:13:01,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 497 transitions. [2023-11-29 02:13:01,740 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 497 transitions. Word has length 97 [2023-11-29 02:13:01,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:13:01,741 INFO L495 AbstractCegarLoop]: Abstraction has 377 states and 497 transitions. [2023-11-29 02:13:01,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 5.0) internal successors, (115), 19 states have internal predecessors, (115), 6 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2023-11-29 02:13:01,741 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 497 transitions. [2023-11-29 02:13:01,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-11-29 02:13:01,742 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:13:01,743 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-29 02:13:01,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 02:13:01,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:13:01,947 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:13:01,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:13:01,947 INFO L85 PathProgramCache]: Analyzing trace with hash 871248503, now seen corresponding path program 1 times [2023-11-29 02:13:01,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:13:01,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172175456] [2023-11-29 02:13:01,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:13:01,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:13:02,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:13:03,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:13:03,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:13:03,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 02:13:03,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:13:03,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 02:13:03,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:13:03,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:13:03,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:13:03,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 02:13:03,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:13:03,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-11-29 02:13:03,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:13:03,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-29 02:13:03,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:13:03,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-11-29 02:13:03,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:13:03,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:13:03,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:13:03,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 02:13:03,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:13:03,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2023-11-29 02:13:03,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:13:03,536 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-29 02:13:03,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:13:03,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172175456] [2023-11-29 02:13:03,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172175456] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:13:03,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181856209] [2023-11-29 02:13:03,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:13:03,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:13:03,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:13:03,538 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:13:03,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 02:13:04,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:13:04,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 2631 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-29 02:13:04,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:13:04,601 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 43 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:13:04,601 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:13:04,863 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 29 treesize of output 17 [2023-11-29 02:13:04,993 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-11-29 02:13:04,994 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 31 treesize of output 26 [2023-11-29 02:13:05,024 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 02:13:05,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181856209] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:13:05,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:13:05,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 23 [2023-11-29 02:13:05,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854772362] [2023-11-29 02:13:05,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:13:05,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 02:13:05,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:13:05,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 02:13:05,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2023-11-29 02:13:05,027 INFO L87 Difference]: Start difference. First operand 377 states and 497 transitions. Second operand has 23 states, 23 states have (on average 5.6521739130434785) internal successors, (130), 18 states have internal predecessors, (130), 7 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (21), 5 states have call predecessors, (21), 7 states have call successors, (21) [2023-11-29 02:13:11,321 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 02:13:15,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:13:19,490 WARN L539 Checker$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 02:13:24,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:13:28,578 WARN L539 Checker$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 02:13:32,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:13:36,766 WARN L539 Checker$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 02:13:40,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:13:46,367 WARN L539 Checker$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 02:13:50,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:13:54,504 WARN L539 Checker$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 02:13:58,572 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:14:02,599 WARN L539 Checker$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 02:14:06,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:14:11,181 WARN L539 Checker$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 02:14:15,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:14:19,798 WARN L539 Checker$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 02:14:23,891 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:14:28,024 WARN L539 Checker$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 02:14:28,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:14:28,409 INFO L93 Difference]: Finished difference Result 796 states and 1020 transitions. [2023-11-29 02:14:28,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 02:14:28,410 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.6521739130434785) internal successors, (130), 18 states have internal predecessors, (130), 7 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (21), 5 states have call predecessors, (21), 7 states have call successors, (21) Word has length 99 [2023-11-29 02:14:28,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:14:28,413 INFO L225 Difference]: With dead ends: 796 [2023-11-29 02:14:28,413 INFO L226 Difference]: Without dead ends: 519 [2023-11-29 02:14:28,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 211 SyntacticMatches, 7 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=310, Invalid=1325, Unknown=5, NotChecked=0, Total=1640 [2023-11-29 02:14:28,415 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 309 mSDsluCounter, 1316 mSDsCounter, 0 mSdLazyCounter, 3410 mSolverCounterSat, 113 mSolverCounterUnsat, 78 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 82.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 1480 SdHoareTripleChecker+Invalid, 3601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 3410 IncrementalHoareTripleChecker+Invalid, 78 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 82.5s IncrementalHoareTripleChecker+Time [2023-11-29 02:14:28,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 1480 Invalid, 3601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 3410 Invalid, 78 Unknown, 0 Unchecked, 82.5s Time] [2023-11-29 02:14:28,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2023-11-29 02:14:28,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 472. [2023-11-29 02:14:28,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 346 states have (on average 1.1791907514450868) internal successors, (408), 356 states have internal predecessors, (408), 84 states have call successors, (84), 36 states have call predecessors, (84), 41 states have return successors, (103), 79 states have call predecessors, (103), 78 states have call successors, (103) [2023-11-29 02:14:28,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 595 transitions. [2023-11-29 02:14:28,520 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 595 transitions. Word has length 99 [2023-11-29 02:14:28,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:14:28,521 INFO L495 AbstractCegarLoop]: Abstraction has 472 states and 595 transitions. [2023-11-29 02:14:28,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.6521739130434785) internal successors, (130), 18 states have internal predecessors, (130), 7 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (21), 5 states have call predecessors, (21), 7 states have call successors, (21) [2023-11-29 02:14:28,521 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 595 transitions. [2023-11-29 02:14:28,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-11-29 02:14:28,522 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:14:28,523 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-29 02:14:28,532 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 02:14:28,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 02:14:28,723 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:14:28,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:14:28,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1119394997, now seen corresponding path program 1 times [2023-11-29 02:14:28,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:14:28,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654395776] [2023-11-29 02:14:28,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:14:28,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:14:29,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:14:31,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:14:31,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:14:31,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 02:14:31,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:14:31,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 02:14:31,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:14:31,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:14:31,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:14:31,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 02:14:31,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:14:31,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-11-29 02:14:31,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:14:31,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-29 02:14:31,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:14:31,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-11-29 02:14:31,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:14:31,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:14:31,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:14:31,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 02:14:31,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:14:31,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2023-11-29 02:14:31,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:14:32,088 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-29 02:14:32,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:14:32,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654395776] [2023-11-29 02:14:32,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654395776] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:14:32,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236754349] [2023-11-29 02:14:32,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:14:32,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:14:32,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:14:32,089 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:14:32,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 02:14:32,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:14:32,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 2636 conjuncts, 72 conjunts are in the unsatisfiable core [2023-11-29 02:14:32,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:14:32,644 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 02:14:33,573 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 02:14:33,573 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:14:54,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236754349] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:14:54,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:14:54,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 28 [2023-11-29 02:14:54,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534867820] [2023-11-29 02:14:54,974 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:14:54,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 02:14:54,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:14:54,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 02:14:54,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=997, Unknown=6, NotChecked=0, Total=1122 [2023-11-29 02:14:54,976 INFO L87 Difference]: Start difference. First operand 472 states and 595 transitions. Second operand has 28 states, 27 states have (on average 3.8518518518518516) internal successors, (104), 24 states have internal predecessors, (104), 8 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2023-11-29 02:15:04,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:15:11,904 WARN L539 Checker$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 02:15:16,007 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:15:20,080 WARN L539 Checker$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 02:15:24,152 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:15:28,183 WARN L539 Checker$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 02:15:32,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:15:37,004 WARN L539 Checker$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 02:15:41,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:15:45,689 WARN L539 Checker$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 02:15:49,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:15:53,981 WARN L539 Checker$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 02:15:54,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:15:54,575 INFO L93 Difference]: Finished difference Result 572 states and 711 transitions. [2023-11-29 02:15:54,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-29 02:15:54,576 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.8518518518518516) internal successors, (104), 24 states have internal predecessors, (104), 8 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) Word has length 99 [2023-11-29 02:15:54,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:15:54,578 INFO L225 Difference]: With dead ends: 572 [2023-11-29 02:15:54,579 INFO L226 Difference]: Without dead ends: 539 [2023-11-29 02:15:54,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1267 ImplicationChecksByTransitivity, 24.4s TimeCoverageRelationStatistics Valid=742, Invalid=3662, Unknown=18, NotChecked=0, Total=4422 [2023-11-29 02:15:54,581 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 647 mSDsluCounter, 1243 mSDsCounter, 0 mSdLazyCounter, 3271 mSolverCounterSat, 276 mSolverCounterUnsat, 42 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 56.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 1380 SdHoareTripleChecker+Invalid, 3589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 3271 IncrementalHoareTripleChecker+Invalid, 42 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 57.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:15:54,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [655 Valid, 1380 Invalid, 3589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 3271 Invalid, 42 Unknown, 0 Unchecked, 57.1s Time] [2023-11-29 02:15:54,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2023-11-29 02:15:54,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 486. [2023-11-29 02:15:54,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 359 states have (on average 1.1727019498607243) internal successors, (421), 369 states have internal predecessors, (421), 84 states have call successors, (84), 37 states have call predecessors, (84), 42 states have return successors, (107), 79 states have call predecessors, (107), 78 states have call successors, (107) [2023-11-29 02:15:54,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 612 transitions. [2023-11-29 02:15:54,701 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 612 transitions. Word has length 99 [2023-11-29 02:15:54,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:15:54,701 INFO L495 AbstractCegarLoop]: Abstraction has 486 states and 612 transitions. [2023-11-29 02:15:54,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.8518518518518516) internal successors, (104), 24 states have internal predecessors, (104), 8 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2023-11-29 02:15:54,702 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 612 transitions. [2023-11-29 02:15:54,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-11-29 02:15:54,703 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:15:54,703 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-29 02:15:54,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 02:15:54,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 02:15:54,904 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:15:54,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:15:54,904 INFO L85 PathProgramCache]: Analyzing trace with hash -976192044, now seen corresponding path program 1 times [2023-11-29 02:15:54,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:15:54,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132896525] [2023-11-29 02:15:54,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:15:54,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:15:54,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:15:55,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:15:55,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:15:55,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 02:15:55,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:15:55,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 02:15:55,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:15:55,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:15:55,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:15:55,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 02:15:55,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:15:55,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-11-29 02:15:55,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:15:55,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-29 02:15:55,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:15:55,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-11-29 02:15:55,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:15:55,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:15:55,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:15:55,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 02:15:55,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:15:55,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2023-11-29 02:15:55,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:15:55,759 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-29 02:15:55,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:15:55,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132896525] [2023-11-29 02:15:55,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132896525] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:15:55,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:15:55,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-29 02:15:55,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047327159] [2023-11-29 02:15:55,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:15:55,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 02:15:55,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:15:55,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 02:15:55,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2023-11-29 02:15:55,761 INFO L87 Difference]: Start difference. First operand 486 states and 612 transitions. Second operand has 13 states, 11 states have (on average 4.545454545454546) internal successors, (50), 8 states have internal predecessors, (50), 2 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2023-11-29 02:15:57,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:15:57,667 INFO L93 Difference]: Finished difference Result 524 states and 654 transitions. [2023-11-29 02:15:57,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 02:15:57,668 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 4.545454545454546) internal successors, (50), 8 states have internal predecessors, (50), 2 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 101 [2023-11-29 02:15:57,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:15:57,671 INFO L225 Difference]: With dead ends: 524 [2023-11-29 02:15:57,671 INFO L226 Difference]: Without dead ends: 516 [2023-11-29 02:15:57,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2023-11-29 02:15:57,672 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 159 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 968 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 1048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-29 02:15:57,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 894 Invalid, 1048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 968 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-29 02:15:57,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2023-11-29 02:15:57,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 489. [2023-11-29 02:15:57,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 362 states have (on average 1.1685082872928176) internal successors, (423), 371 states have internal predecessors, (423), 83 states have call successors, (83), 38 states have call predecessors, (83), 43 states have return successors, (107), 79 states have call predecessors, (107), 78 states have call successors, (107) [2023-11-29 02:15:57,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 613 transitions. [2023-11-29 02:15:57,766 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 613 transitions. Word has length 101 [2023-11-29 02:15:57,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:15:57,767 INFO L495 AbstractCegarLoop]: Abstraction has 489 states and 613 transitions. [2023-11-29 02:15:57,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 4.545454545454546) internal successors, (50), 8 states have internal predecessors, (50), 2 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2023-11-29 02:15:57,767 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 613 transitions. [2023-11-29 02:15:57,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-11-29 02:15:57,768 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:15:57,769 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-29 02:15:57,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-11-29 02:15:57,769 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:15:57,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:15:57,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1510149106, now seen corresponding path program 1 times [2023-11-29 02:15:57,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:15:57,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175063842] [2023-11-29 02:15:57,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:15:57,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:15:58,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:16:00,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:16:00,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:16:00,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 02:16:00,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:16:00,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 02:16:00,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:16:00,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:16:00,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:16:00,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 02:16:00,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:16:00,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-11-29 02:16:00,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:16:00,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-29 02:16:00,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:16:00,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-11-29 02:16:00,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:16:00,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:16:00,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:16:00,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 02:16:00,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:16:00,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2023-11-29 02:16:00,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:16:01,097 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 18 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-29 02:16:01,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:16:01,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175063842] [2023-11-29 02:16:01,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175063842] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:16:01,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789170393] [2023-11-29 02:16:01,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:16:01,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:16:01,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:16:01,099 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:16:01,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 02:16:01,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:16:01,577 INFO L262 TraceCheckSpWp]: Trace formula consists of 2646 conjuncts, 71 conjunts are in the unsatisfiable core [2023-11-29 02:16:01,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:16:01,700 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 02:16:03,363 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-29 02:16:03,363 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:16:04,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789170393] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:16:04,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:16:04,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 21] total 42 [2023-11-29 02:16:04,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152463421] [2023-11-29 02:16:04,346 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:16:04,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-29 02:16:04,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:16:04,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-29 02:16:04,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2608, Unknown=0, NotChecked=0, Total=2756 [2023-11-29 02:16:04,349 INFO L87 Difference]: Start difference. First operand 489 states and 613 transitions. Second operand has 42 states, 33 states have (on average 3.303030303030303) internal successors, (109), 33 states have internal predecessors, (109), 9 states have call successors, (20), 7 states have call predecessors, (20), 10 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) [2023-11-29 02:16:16,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:16:25,380 WARN L539 Checker$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 02:16:29,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:16:33,651 WARN L539 Checker$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 02:16:37,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:16:41,797 WARN L539 Checker$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 02:16:46,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:16:51,043 WARN L539 Checker$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 02:16:55,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:16:59,973 WARN L539 Checker$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 02:17:04,151 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:17:08,402 WARN L539 Checker$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 02:17:08,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:17:08,882 INFO L93 Difference]: Finished difference Result 557 states and 691 transitions. [2023-11-29 02:17:08,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-11-29 02:17:08,883 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 33 states have (on average 3.303030303030303) internal successors, (109), 33 states have internal predecessors, (109), 9 states have call successors, (20), 7 states have call predecessors, (20), 10 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) Word has length 101 [2023-11-29 02:17:08,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:17:08,885 INFO L225 Difference]: With dead ends: 557 [2023-11-29 02:17:08,885 INFO L226 Difference]: Without dead ends: 555 [2023-11-29 02:17:08,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 132 SyntacticMatches, 5 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3547 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=1684, Invalid=12358, Unknown=0, NotChecked=0, Total=14042 [2023-11-29 02:17:08,889 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 706 mSDsluCounter, 2715 mSDsCounter, 0 mSdLazyCounter, 6967 mSolverCounterSat, 303 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 58.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 714 SdHoareTripleChecker+Valid, 2847 SdHoareTripleChecker+Invalid, 7282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 6967 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 59.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:17:08,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [714 Valid, 2847 Invalid, 7282 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [303 Valid, 6967 Invalid, 12 Unknown, 0 Unchecked, 59.3s Time] [2023-11-29 02:17:08,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2023-11-29 02:17:08,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 488. [2023-11-29 02:17:08,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 362 states have (on average 1.1685082872928176) internal successors, (423), 371 states have internal predecessors, (423), 82 states have call successors, (82), 38 states have call predecessors, (82), 43 states have return successors, (106), 78 states have call predecessors, (106), 77 states have call successors, (106) [2023-11-29 02:17:08,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 611 transitions. [2023-11-29 02:17:08,986 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 611 transitions. Word has length 101 [2023-11-29 02:17:08,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:17:08,987 INFO L495 AbstractCegarLoop]: Abstraction has 488 states and 611 transitions. [2023-11-29 02:17:08,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 33 states have (on average 3.303030303030303) internal successors, (109), 33 states have internal predecessors, (109), 9 states have call successors, (20), 7 states have call predecessors, (20), 10 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) [2023-11-29 02:17:08,987 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 611 transitions. [2023-11-29 02:17:08,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-11-29 02:17:08,989 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:17:08,989 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-29 02:17:08,997 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 02:17:09,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:17:09,189 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:17:09,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:17:09,190 INFO L85 PathProgramCache]: Analyzing trace with hash 336546076, now seen corresponding path program 1 times [2023-11-29 02:17:09,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:17:09,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804588211] [2023-11-29 02:17:09,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:17:09,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:17:09,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:17:11,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:17:11,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:17:11,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 02:17:11,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:17:11,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 02:17:11,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:17:11,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:17:11,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:17:11,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 02:17:11,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:17:11,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-11-29 02:17:11,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:17:11,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-29 02:17:11,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:17:11,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-11-29 02:17:11,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:17:11,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:17:11,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:17:11,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2023-11-29 02:17:11,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:17:11,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-11-29 02:17:11,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:17:11,431 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-29 02:17:11,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:17:11,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804588211] [2023-11-29 02:17:11,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804588211] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:17:11,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:17:11,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-11-29 02:17:11,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005167645] [2023-11-29 02:17:11,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:17:11,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 02:17:11,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:17:11,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 02:17:11,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2023-11-29 02:17:11,433 INFO L87 Difference]: Start difference. First operand 488 states and 611 transitions. Second operand has 18 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 7 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2023-11-29 02:17:14,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:17:14,932 INFO L93 Difference]: Finished difference Result 638 states and 796 transitions. [2023-11-29 02:17:14,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 02:17:14,932 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 7 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) Word has length 104 [2023-11-29 02:17:14,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:17:14,935 INFO L225 Difference]: With dead ends: 638 [2023-11-29 02:17:14,935 INFO L226 Difference]: Without dead ends: 548 [2023-11-29 02:17:14,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 02:17:14,936 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 311 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 1639 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 1857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 1639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-11-29 02:17:14,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 478 Invalid, 1857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 1639 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-11-29 02:17:14,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2023-11-29 02:17:15,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 484. [2023-11-29 02:17:15,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 360 states have (on average 1.163888888888889) internal successors, (419), 369 states have internal predecessors, (419), 80 states have call successors, (80), 38 states have call predecessors, (80), 43 states have return successors, (104), 76 states have call predecessors, (104), 75 states have call successors, (104) [2023-11-29 02:17:15,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 603 transitions. [2023-11-29 02:17:15,069 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 603 transitions. Word has length 104 [2023-11-29 02:17:15,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:17:15,069 INFO L495 AbstractCegarLoop]: Abstraction has 484 states and 603 transitions. [2023-11-29 02:17:15,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 7 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2023-11-29 02:17:15,070 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 603 transitions. [2023-11-29 02:17:15,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-29 02:17:15,071 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:17:15,071 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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] [2023-11-29 02:17:15,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-11-29 02:17:15,072 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:17:15,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:17:15,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1554318955, now seen corresponding path program 1 times [2023-11-29 02:17:15,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:17:15,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568490659] [2023-11-29 02:17:15,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:17:15,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:17:15,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:17:15,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:17:15,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:17:15,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 02:17:15,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:17:15,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 02:17:15,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:17:15,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:17:15,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:17:15,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 02:17:15,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:17:15,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-11-29 02:17:15,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:17:15,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-29 02:17:15,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:17:15,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-11-29 02:17:15,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:17:15,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:17:15,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:17:15,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2023-11-29 02:17:15,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:17:15,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2023-11-29 02:17:15,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:17:15,660 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-11-29 02:17:15,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:17:15,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568490659] [2023-11-29 02:17:15,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568490659] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:17:15,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:17:15,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-29 02:17:15,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055947531] [2023-11-29 02:17:15,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:17:15,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 02:17:15,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:17:15,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 02:17:15,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-11-29 02:17:15,663 INFO L87 Difference]: Start difference. First operand 484 states and 603 transitions. Second operand has 10 states, 8 states have (on average 7.0) internal successors, (56), 6 states have internal predecessors, (56), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2023-11-29 02:17:17,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:17:17,482 INFO L93 Difference]: Finished difference Result 531 states and 659 transitions. [2023-11-29 02:17:17,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 02:17:17,483 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 7.0) internal successors, (56), 6 states have internal predecessors, (56), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 109 [2023-11-29 02:17:17,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:17:17,486 INFO L225 Difference]: With dead ends: 531 [2023-11-29 02:17:17,486 INFO L226 Difference]: Without dead ends: 529 [2023-11-29 02:17:17,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2023-11-29 02:17:17,487 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 73 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-29 02:17:17,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 717 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-29 02:17:17,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2023-11-29 02:17:17,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 508. [2023-11-29 02:17:17,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 375 states have (on average 1.1573333333333333) internal successors, (434), 387 states have internal predecessors, (434), 83 states have call successors, (83), 41 states have call predecessors, (83), 49 states have return successors, (117), 79 states have call predecessors, (117), 78 states have call successors, (117) [2023-11-29 02:17:17,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 634 transitions. [2023-11-29 02:17:17,605 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 634 transitions. Word has length 109 [2023-11-29 02:17:17,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:17:17,605 INFO L495 AbstractCegarLoop]: Abstraction has 508 states and 634 transitions. [2023-11-29 02:17:17,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 7.0) internal successors, (56), 6 states have internal predecessors, (56), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2023-11-29 02:17:17,605 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 634 transitions. [2023-11-29 02:17:17,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-11-29 02:17:17,607 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:17:17,607 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2023-11-29 02:17:17,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-11-29 02:17:17,607 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:17:17,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:17:17,608 INFO L85 PathProgramCache]: Analyzing trace with hash 885180495, now seen corresponding path program 1 times [2023-11-29 02:17:17,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:17:17,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058493779] [2023-11-29 02:17:17,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:17:17,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:17:17,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:17:18,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:17:18,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:17:18,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 02:17:18,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:17:18,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 02:17:18,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:17:18,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:17:18,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:17:18,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 02:17:18,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:17:18,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-11-29 02:17:18,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:17:18,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-29 02:17:18,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:17:18,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-11-29 02:17:18,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:17:18,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:17:18,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:17:18,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2023-11-29 02:17:18,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:17:18,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2023-11-29 02:17:18,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:17:19,095 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 44 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-29 02:17:19,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:17:19,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058493779] [2023-11-29 02:17:19,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058493779] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:17:19,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584486388] [2023-11-29 02:17:19,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:17:19,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:17:19,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:17:19,097 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:17:19,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 02:17:19,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:17:19,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 2689 conjuncts, 92 conjunts are in the unsatisfiable core [2023-11-29 02:17:19,590 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:17:19,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2023-11-29 02:17:19,876 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-29 02:17:19,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-29 02:17:19,889 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 02:17:20,220 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-29 02:17:20,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-29 02:17:20,678 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-11-29 02:17:20,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 16 treesize of output 18 [2023-11-29 02:17:20,837 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 19 treesize of output 14 [2023-11-29 02:17:29,685 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 25 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 02:17:29,686 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:17:30,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584486388] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:17:30,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:17:30,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 26] total 39 [2023-11-29 02:17:30,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767078135] [2023-11-29 02:17:30,317 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:17:30,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-29 02:17:30,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:17:30,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-29 02:17:30,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1810, Unknown=21, NotChecked=0, Total=1980 [2023-11-29 02:17:30,318 INFO L87 Difference]: Start difference. First operand 508 states and 634 transitions. Second operand has 39 states, 36 states have (on average 4.222222222222222) internal successors, (152), 36 states have internal predecessors, (152), 14 states have call successors, (23), 8 states have call predecessors, (23), 9 states have return successors, (22), 12 states have call predecessors, (22), 13 states have call successors, (22) [2023-11-29 02:17:36,343 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:17:43,404 WARN L539 Checker$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 02:17:51,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:17:58,397 WARN L539 Checker$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 02:18:02,711 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:18:06,829 WARN L539 Checker$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 02:18:11,266 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:18:15,771 WARN L539 Checker$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 02:18:19,789 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:18:24,467 WARN L539 Checker$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 02:18:28,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:18:35,584 WARN L539 Checker$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 02:18:40,620 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:18:44,835 WARN L539 Checker$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 02:18:49,490 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:18:53,559 WARN L539 Checker$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 02:18:58,008 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:19:02,193 WARN L539 Checker$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 02:19:02,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:19:02,235 INFO L93 Difference]: Finished difference Result 1253 states and 1562 transitions. [2023-11-29 02:19:02,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2023-11-29 02:19:02,236 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 4.222222222222222) internal successors, (152), 36 states have internal predecessors, (152), 14 states have call successors, (23), 8 states have call predecessors, (23), 9 states have return successors, (22), 12 states have call predecessors, (22), 13 states have call successors, (22) Word has length 113 [2023-11-29 02:19:02,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:19:02,241 INFO L225 Difference]: With dead ends: 1253 [2023-11-29 02:19:02,241 INFO L226 Difference]: Without dead ends: 835 [2023-11-29 02:19:02,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 158 SyntacticMatches, 10 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6631 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=2323, Invalid=17297, Unknown=120, NotChecked=0, Total=19740 [2023-11-29 02:19:02,245 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 1223 mSDsluCounter, 1528 mSDsCounter, 0 mSdLazyCounter, 4471 mSolverCounterSat, 474 mSolverCounterUnsat, 32 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 80.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1228 SdHoareTripleChecker+Valid, 1625 SdHoareTripleChecker+Invalid, 4977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 474 IncrementalHoareTripleChecker+Valid, 4471 IncrementalHoareTripleChecker+Invalid, 32 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 80.8s IncrementalHoareTripleChecker+Time [2023-11-29 02:19:02,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1228 Valid, 1625 Invalid, 4977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [474 Valid, 4471 Invalid, 32 Unknown, 0 Unchecked, 80.8s Time] [2023-11-29 02:19:02,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2023-11-29 02:19:02,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 713. [2023-11-29 02:19:02,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 533 states have (on average 1.1594746716697937) internal successors, (618), 553 states have internal predecessors, (618), 110 states have call successors, (110), 53 states have call predecessors, (110), 69 states have return successors, (138), 106 states have call predecessors, (138), 101 states have call successors, (138) [2023-11-29 02:19:02,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 866 transitions. [2023-11-29 02:19:02,372 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 866 transitions. Word has length 113 [2023-11-29 02:19:02,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:19:02,372 INFO L495 AbstractCegarLoop]: Abstraction has 713 states and 866 transitions. [2023-11-29 02:19:02,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 4.222222222222222) internal successors, (152), 36 states have internal predecessors, (152), 14 states have call successors, (23), 8 states have call predecessors, (23), 9 states have return successors, (22), 12 states have call predecessors, (22), 13 states have call successors, (22) [2023-11-29 02:19:02,372 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 866 transitions. [2023-11-29 02:19:02,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-11-29 02:19:02,373 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:19:02,373 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2023-11-29 02:19:02,383 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 02:19:02,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:19:02,574 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:19:02,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:19:02,574 INFO L85 PathProgramCache]: Analyzing trace with hash 761650965, now seen corresponding path program 1 times [2023-11-29 02:19:02,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:19:02,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547488014] [2023-11-29 02:19:02,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:19:02,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:19:02,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:03,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:19:03,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:03,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 02:19:03,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:03,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 02:19:03,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:03,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:19:03,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:03,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 02:19:03,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:03,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-11-29 02:19:03,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:03,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-29 02:19:03,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:03,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-11-29 02:19:03,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:03,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:19:03,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:03,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2023-11-29 02:19:03,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:03,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-29 02:19:03,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:03,130 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-29 02:19:03,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:19:03,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547488014] [2023-11-29 02:19:03,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547488014] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:19:03,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919123175] [2023-11-29 02:19:03,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:19:03,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:19:03,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:19:03,132 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:19:03,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 02:19:03,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:03,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 2690 conjuncts, 82 conjunts are in the unsatisfiable core [2023-11-29 02:19:03,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:19:03,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2023-11-29 02:19:03,779 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-29 02:19:03,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-29 02:19:04,309 INFO L349 Elim1Store]: treesize reduction 48, result has 28.4 percent of original size [2023-11-29 02:19:04,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 28 [2023-11-29 02:19:04,673 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-11-29 02:19:04,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 16 treesize of output 18 [2023-11-29 02:19:04,784 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 18 treesize of output 13 [2023-11-29 02:19:05,645 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 18 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:19:05,646 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:19:06,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919123175] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:19:06,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:19:06,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 28] total 35 [2023-11-29 02:19:06,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681803453] [2023-11-29 02:19:06,758 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:19:06,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-29 02:19:06,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:19:06,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-29 02:19:06,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1716, Unknown=22, NotChecked=0, Total=1892 [2023-11-29 02:19:06,760 INFO L87 Difference]: Start difference. First operand 713 states and 866 transitions. Second operand has 35 states, 32 states have (on average 4.46875) internal successors, (143), 30 states have internal predecessors, (143), 9 states have call successors, (23), 9 states have call predecessors, (23), 9 states have return successors, (22), 10 states have call predecessors, (22), 9 states have call successors, (22) [2023-11-29 02:19:15,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:19:36,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:19:36,094 INFO L93 Difference]: Finished difference Result 1889 states and 2284 transitions. [2023-11-29 02:19:36,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2023-11-29 02:19:36,094 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 4.46875) internal successors, (143), 30 states have internal predecessors, (143), 9 states have call successors, (23), 9 states have call predecessors, (23), 9 states have return successors, (22), 10 states have call predecessors, (22), 9 states have call successors, (22) Word has length 117 [2023-11-29 02:19:36,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:19:36,099 INFO L225 Difference]: With dead ends: 1889 [2023-11-29 02:19:36,099 INFO L226 Difference]: Without dead ends: 1296 [2023-11-29 02:19:36,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 159 SyntacticMatches, 9 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4673 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=2274, Invalid=13958, Unknown=24, NotChecked=0, Total=16256 [2023-11-29 02:19:36,103 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 1192 mSDsluCounter, 2128 mSDsCounter, 0 mSdLazyCounter, 5669 mSolverCounterSat, 583 mSolverCounterUnsat, 32 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1234 SdHoareTripleChecker+Valid, 2279 SdHoareTripleChecker+Invalid, 6284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 583 IncrementalHoareTripleChecker+Valid, 5669 IncrementalHoareTripleChecker+Invalid, 32 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:19:36,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1234 Valid, 2279 Invalid, 6284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [583 Valid, 5669 Invalid, 32 Unknown, 0 Unchecked, 20.1s Time] [2023-11-29 02:19:36,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1296 states. [2023-11-29 02:19:36,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1296 to 1066. [2023-11-29 02:19:36,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1066 states, 810 states have (on average 1.1592592592592592) internal successors, (939), 841 states have internal predecessors, (939), 150 states have call successors, (150), 77 states have call predecessors, (150), 105 states have return successors, (181), 147 states have call predecessors, (181), 138 states have call successors, (181) [2023-11-29 02:19:36,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1270 transitions. [2023-11-29 02:19:36,271 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1270 transitions. Word has length 117 [2023-11-29 02:19:36,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:19:36,271 INFO L495 AbstractCegarLoop]: Abstraction has 1066 states and 1270 transitions. [2023-11-29 02:19:36,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 4.46875) internal successors, (143), 30 states have internal predecessors, (143), 9 states have call successors, (23), 9 states have call predecessors, (23), 9 states have return successors, (22), 10 states have call predecessors, (22), 9 states have call successors, (22) [2023-11-29 02:19:36,271 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1270 transitions. [2023-11-29 02:19:36,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-11-29 02:19:36,273 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:19:36,273 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-29 02:19:36,281 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 02:19:36,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:19:36,474 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:19:36,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:19:36,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1289378538, now seen corresponding path program 1 times [2023-11-29 02:19:36,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:19:36,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437772901] [2023-11-29 02:19:36,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:19:36,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:19:36,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:37,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:19:37,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:37,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 02:19:37,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:37,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 02:19:37,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:37,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:19:37,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:37,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 02:19:37,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:37,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-11-29 02:19:37,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:37,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-29 02:19:37,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:37,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-11-29 02:19:37,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:37,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:19:37,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:37,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2023-11-29 02:19:37,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:37,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2023-11-29 02:19:37,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:37,979 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 56 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-29 02:19:37,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:19:37,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437772901] [2023-11-29 02:19:37,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437772901] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:19:37,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437392552] [2023-11-29 02:19:37,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:19:37,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:19:37,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:19:37,980 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:19:37,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7e57f6-2414-4688-bf8b-453ae96b49bc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 02:19:38,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:38,420 INFO L262 TraceCheckSpWp]: Trace formula consists of 2705 conjuncts, 88 conjunts are in the unsatisfiable core [2023-11-29 02:19:38,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:19:43,042 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-29 02:19:43,043 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 1 case distinctions, treesize of input 28 treesize of output 25 [2023-11-29 02:19:43,944 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 25 proven. 58 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 02:19:43,944 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:19:45,111 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 56 proven. 13 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-29 02:19:45,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437392552] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:19:45,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:19:45,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 23, 11] total 38 [2023-11-29 02:19:45,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849722107] [2023-11-29 02:19:45,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:19:45,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-29 02:19:45,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:19:45,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-29 02:19:45,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1268, Unknown=1, NotChecked=0, Total=1406 [2023-11-29 02:19:45,113 INFO L87 Difference]: Start difference. First operand 1066 states and 1270 transitions. Second operand has 38 states, 37 states have (on average 4.45945945945946) internal successors, (165), 33 states have internal predecessors, (165), 11 states have call successors, (26), 7 states have call predecessors, (26), 8 states have return successors, (23), 10 states have call predecessors, (23), 10 states have call successors, (23) [2023-11-29 02:19:52,073 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 02:19:56,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:20:00,390 WARN L539 Checker$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 02:20:06,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:20:12,968 WARN L539 Checker$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 02:20:17,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:20:21,681 WARN L539 Checker$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 02:20:25,732 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]