./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 cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3594ef88-f4a5-404b-ab28-7ab1a6746e6a/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3594ef88-f4a5-404b-ab28-7ab1a6746e6a/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3594ef88-f4a5-404b-ab28-7ab1a6746e6a/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3594ef88-f4a5-404b-ab28-7ab1a6746e6a/bin/uautomizer-verify-uTZkv6EMXl/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_3594ef88-f4a5-404b-ab28-7ab1a6746e6a/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3594ef88-f4a5-404b-ab28-7ab1a6746e6a/bin/uautomizer-verify-uTZkv6EMXl --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 0.2.3-dev-cf1a783 [2023-11-12 02:18:30,287 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:18:30,433 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3594ef88-f4a5-404b-ab28-7ab1a6746e6a/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-64bit-Automizer_Default.epf [2023-11-12 02:18:30,442 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:18:30,443 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:18:30,483 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:18:30,483 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:18:30,484 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:18:30,485 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:18:30,490 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:18:30,491 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:18:30,492 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:18:30,492 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:18:30,494 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:18:30,495 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:18:30,495 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:18:30,495 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:18:30,496 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:18:30,496 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:18:30,497 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:18:30,497 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:18:30,498 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:18:30,499 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:18:30,499 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:18:30,499 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:18:30,500 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:18:30,500 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:18:30,501 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:18:30,501 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:18:30,502 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:18:30,503 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:18:30,503 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:18:30,503 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:18:30,504 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:18:30,504 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:18:30,504 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:18:30,504 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_3594ef88-f4a5-404b-ab28-7ab1a6746e6a/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3594ef88-f4a5-404b-ab28-7ab1a6746e6a/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4fce72e4c86270281dd05ead367908aebeea58cd11d1d4da51b0e6a5af67a67d [2023-11-12 02:18:30,772 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:18:30,803 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:18:30,805 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:18:30,806 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:18:30,807 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:18:30,809 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3594ef88-f4a5-404b-ab28-7ab1a6746e6a/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i [2023-11-12 02:18:33,965 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:18:34,667 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:18:34,668 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3594ef88-f4a5-404b-ab28-7ab1a6746e6a/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i [2023-11-12 02:18:34,721 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3594ef88-f4a5-404b-ab28-7ab1a6746e6a/bin/uautomizer-verify-uTZkv6EMXl/data/45cb39517/59f99f1072d343069d2867e6f3cae2b1/FLAG2f660b0f3 [2023-11-12 02:18:34,742 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3594ef88-f4a5-404b-ab28-7ab1a6746e6a/bin/uautomizer-verify-uTZkv6EMXl/data/45cb39517/59f99f1072d343069d2867e6f3cae2b1 [2023-11-12 02:18:34,747 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:18:34,749 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:18:34,753 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:18:34,754 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:18:34,760 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:18:34,760 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:18:34" (1/1) ... [2023-11-12 02:18:34,762 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@87effcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:18:34, skipping insertion in model container [2023-11-12 02:18:34,762 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:18:34" (1/1) ... [2023-11-12 02:18:34,966 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:18:35,322 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_3594ef88-f4a5-404b-ab28-7ab1a6746e6a/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i[4503,4516] [2023-11-12 02:18:35,331 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_3594ef88-f4a5-404b-ab28-7ab1a6746e6a/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i[4563,4576] [2023-11-12 02:18:36,480 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:18:36,481 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:18:36,482 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:18:36,483 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:18:36,484 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:18:36,503 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:18:36,504 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:18:36,506 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:18:36,507 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:18:37,009 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-12 02:18:37,011 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-12 02:18:37,012 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-12 02:18:37,014 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-12 02:18:37,016 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-12 02:18:37,017 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-12 02:18:37,018 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-12 02:18:37,019 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-12 02:18:37,020 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-12 02:18:37,020 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-12 02:18:37,232 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:18:37,232 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:18:37,357 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:18:37,369 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:18:37,469 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:18:37,547 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:18:37,573 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_3594ef88-f4a5-404b-ab28-7ab1a6746e6a/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i[4503,4516] [2023-11-12 02:18:37,574 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_3594ef88-f4a5-404b-ab28-7ab1a6746e6a/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i[4563,4576] [2023-11-12 02:18:37,630 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:18:37,631 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:18:37,632 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:18:37,632 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:18:37,633 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:18:37,641 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:18:37,642 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:18:37,644 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:18:37,645 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:18:37,704 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-12 02:18:37,705 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-12 02:18:37,706 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-12 02:18:37,708 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-12 02:18:37,709 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-12 02:18:37,710 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-12 02:18:37,710 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-12 02:18:37,712 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-12 02:18:37,713 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-12 02:18:37,714 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-12 02:18:37,822 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:18:37,823 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:18:37,891 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : "+r"(index)); [8097] [2023-11-12 02:18:37,893 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:18:37,895 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:18:37,912 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [8583-8594] [2023-11-12 02:18:37,950 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:18:38,303 WARN L672 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:18:38,304 WARN L672 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:18:38,304 WARN L672 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:18:38,304 WARN L672 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:18:38,304 WARN L672 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:18:38,304 WARN L672 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:18:38,305 WARN L672 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:18:38,305 WARN L672 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:18:38,305 WARN L672 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:18:38,305 WARN L672 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:18:38,306 WARN L672 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:18:38,306 WARN L672 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:18:38,306 WARN L672 CHandler]: The function predicate is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:18:38,307 WARN L672 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:18:38,308 WARN L672 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:18:38,308 WARN L672 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:18:38,308 WARN L672 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:18:38,309 WARN L672 CHandler]: The function memchr is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:18:38,317 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:18:38,318 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:18:38 WrapperNode [2023-11-12 02:18:38,319 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:18:38,320 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:18:38,320 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:18:38,321 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:18:38,329 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:18:38" (1/1) ... [2023-11-12 02:18:38,447 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:18:38" (1/1) ... [2023-11-12 02:18:38,531 INFO L138 Inliner]: procedures = 691, calls = 2503, calls flagged for inlining = 57, calls inlined = 12, statements flattened = 1002 [2023-11-12 02:18:38,531 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:18:38,532 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:18:38,532 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:18:38,532 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:18:38,542 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:18:38" (1/1) ... [2023-11-12 02:18:38,542 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:18:38" (1/1) ... [2023-11-12 02:18:38,552 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:18:38" (1/1) ... [2023-11-12 02:18:38,553 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:18:38" (1/1) ... [2023-11-12 02:18:38,592 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:18:38" (1/1) ... [2023-11-12 02:18:38,597 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:18:38" (1/1) ... [2023-11-12 02:18:38,604 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:18:38" (1/1) ... [2023-11-12 02:18:38,611 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:18:38" (1/1) ... [2023-11-12 02:18:38,622 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:18:38,623 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:18:38,624 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:18:38,624 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:18:38,625 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:18:38" (1/1) ... [2023-11-12 02:18:38,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:18:38,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3594ef88-f4a5-404b-ab28-7ab1a6746e6a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:18:38,676 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3594ef88-f4a5-404b-ab28-7ab1a6746e6a/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:18:38,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3594ef88-f4a5-404b-ab28-7ab1a6746e6a/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:18:38,722 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2023-11-12 02:18:38,722 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2023-11-12 02:18:38,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:18:38,723 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-12 02:18:38,723 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-12 02:18:38,723 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:18:38,723 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-12 02:18:38,723 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-12 02:18:38,723 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-12 02:18:38,724 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-12 02:18:38,724 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 02:18:38,724 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:18:38,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 02:18:38,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:18:38,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:18:38,725 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-12 02:18:38,725 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-12 02:18:38,725 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_realloc [2023-11-12 02:18:38,725 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_realloc [2023-11-12 02:18:38,725 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2023-11-12 02:18:38,725 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2023-11-12 02:18:38,726 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 02:18:38,726 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 02:18:38,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:18:38,726 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2023-11-12 02:18:38,726 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2023-11-12 02:18:38,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 02:18:38,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-12 02:18:38,727 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-11-12 02:18:38,727 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-11-12 02:18:38,727 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2023-11-12 02:18:38,727 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2023-11-12 02:18:38,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:18:38,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:18:39,022 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:18:39,024 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:18:40,805 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:18:40,817 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:18:40,817 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-11-12 02:18:40,821 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:18:40 BoogieIcfgContainer [2023-11-12 02:18:40,821 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:18:40,825 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:18:40,825 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:18:40,829 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:18:40,830 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:18:34" (1/3) ... [2023-11-12 02:18:40,831 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18fcc604 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:18:40, skipping insertion in model container [2023-11-12 02:18:40,832 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:18:38" (2/3) ... [2023-11-12 02:18:40,832 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18fcc604 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:18:40, skipping insertion in model container [2023-11-12 02:18:40,832 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:18:40" (3/3) ... [2023-11-12 02:18:40,834 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_reserve_relative_harness.i [2023-11-12 02:18:40,855 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:18:40,856 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:18:40,931 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:18:40,943 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;@4980a625, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:18:40,944 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 02:18:40,953 INFO L276 IsEmpty]: Start isEmpty. Operand has 160 states, 111 states have (on average 1.3153153153153154) internal successors, (146), 110 states have internal predecessors, (146), 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) [2023-11-12 02:18:40,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-12 02:18:40,967 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:18:40,969 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, 1] [2023-11-12 02:18:40,969 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:18:40,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:40,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1108355223, now seen corresponding path program 1 times [2023-11-12 02:18:40,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:40,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029153336] [2023-11-12 02:18:40,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:40,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:41,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:41,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:18:41,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:41,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-12 02:18:41,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:41,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-12 02:18:41,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:41,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-12 02:18:41,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:41,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-12 02:18:41,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:41,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-12 02:18:41,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:41,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:18:41,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:41,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029153336] [2023-11-12 02:18:41,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029153336] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:18:41,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:18:41,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:18:41,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371017166] [2023-11-12 02:18:41,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:18:41,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:18:41,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:42,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:18:42,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:18:42,008 INFO L87 Difference]: Start difference. First operand has 160 states, 111 states have (on average 1.3153153153153154) internal successors, (146), 110 states have internal predecessors, (146), 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 7.5) internal successors, (30), 2 states have internal predecessors, (30), 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) [2023-11-12 02:18:42,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:18:42,651 INFO L93 Difference]: Finished difference Result 320 states and 455 transitions. [2023-11-12 02:18:42,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:18:42,655 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 2 states have internal predecessors, (30), 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 46 [2023-11-12 02:18:42,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:18:42,673 INFO L225 Difference]: With dead ends: 320 [2023-11-12 02:18:42,673 INFO L226 Difference]: Without dead ends: 165 [2023-11-12 02:18:42,683 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 [2023-11-12 02:18:42,694 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 128 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 02:18:42,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 268 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 02:18:42,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-11-12 02:18:42,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 155. [2023-11-12 02:18:42,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 105 states have (on average 1.2571428571428571) internal successors, (132), 106 states have internal predecessors, (132), 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) [2023-11-12 02:18:42,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 207 transitions. [2023-11-12 02:18:42,773 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 207 transitions. Word has length 46 [2023-11-12 02:18:42,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:18:42,775 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 207 transitions. [2023-11-12 02:18:42,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 2 states have internal predecessors, (30), 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) [2023-11-12 02:18:42,776 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 207 transitions. [2023-11-12 02:18:42,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-12 02:18:42,780 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:18:42,780 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, 1] [2023-11-12 02:18:42,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:18:42,781 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:18:42,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:42,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1165194515, now seen corresponding path program 1 times [2023-11-12 02:18:42,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:42,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266652011] [2023-11-12 02:18:42,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:42,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:42,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:43,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:18:43,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:43,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-12 02:18:43,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:43,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-12 02:18:43,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:43,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-12 02:18:43,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:43,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-12 02:18:43,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:43,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-12 02:18:43,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:43,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:18:43,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:43,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266652011] [2023-11-12 02:18:43,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266652011] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:18:43,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:18:43,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 02:18:43,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605867252] [2023-11-12 02:18:43,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:18:43,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:18:43,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:43,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:18:43,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:18:43,750 INFO L87 Difference]: Start difference. First operand 155 states and 207 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 5 states have internal predecessors, (30), 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) [2023-11-12 02:18:44,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:18:44,494 INFO L93 Difference]: Finished difference Result 307 states and 413 transitions. [2023-11-12 02:18:44,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:18:44,495 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 5 states have internal predecessors, (30), 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 46 [2023-11-12 02:18:44,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:18:44,498 INFO L225 Difference]: With dead ends: 307 [2023-11-12 02:18:44,498 INFO L226 Difference]: Without dead ends: 168 [2023-11-12 02:18:44,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:18:44,501 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 205 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 02:18:44,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 462 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 02:18:44,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-11-12 02:18:44,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 158. [2023-11-12 02:18:44,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 107 states have (on average 1.2523364485981308) internal successors, (134), 109 states have internal predecessors, (134), 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) [2023-11-12 02:18:44,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 215 transitions. [2023-11-12 02:18:44,524 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 215 transitions. Word has length 46 [2023-11-12 02:18:44,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:18:44,525 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 215 transitions. [2023-11-12 02:18:44,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 5 states have internal predecessors, (30), 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) [2023-11-12 02:18:44,526 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 215 transitions. [2023-11-12 02:18:44,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-12 02:18:44,528 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:18:44,528 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, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:18:44,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:18:44,529 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:18:44,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:44,530 INFO L85 PathProgramCache]: Analyzing trace with hash 862482782, now seen corresponding path program 1 times [2023-11-12 02:18:44,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:44,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560634042] [2023-11-12 02:18:44,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:44,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:44,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:45,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:18:45,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:45,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-12 02:18:45,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:45,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-12 02:18:45,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:45,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-12 02:18:45,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:45,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-12 02:18:45,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:45,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-12 02:18:45,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:45,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:18:45,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:45,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560634042] [2023-11-12 02:18:45,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560634042] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:18:45,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:18:45,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-12 02:18:45,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667391176] [2023-11-12 02:18:45,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:18:45,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:18:45,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:45,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:18:45,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:18:45,155 INFO L87 Difference]: Start difference. First operand 158 states and 215 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 5 states have internal predecessors, (36), 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) [2023-11-12 02:18:45,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:18:45,830 INFO L93 Difference]: Finished difference Result 210 states and 276 transitions. [2023-11-12 02:18:45,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:18:45,831 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 5 states have internal predecessors, (36), 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 52 [2023-11-12 02:18:45,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:18:45,833 INFO L225 Difference]: With dead ends: 210 [2023-11-12 02:18:45,834 INFO L226 Difference]: Without dead ends: 172 [2023-11-12 02:18:45,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:18:45,835 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 131 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 02:18:45,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 633 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 02:18:45,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2023-11-12 02:18:45,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 160. [2023-11-12 02:18:45,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 109 states have (on average 1.2477064220183487) internal successors, (136), 111 states have internal predecessors, (136), 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) [2023-11-12 02:18:45,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 217 transitions. [2023-11-12 02:18:45,864 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 217 transitions. Word has length 52 [2023-11-12 02:18:45,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:18:45,864 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 217 transitions. [2023-11-12 02:18:45,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 5 states have internal predecessors, (36), 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) [2023-11-12 02:18:45,865 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 217 transitions. [2023-11-12 02:18:45,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-12 02:18:45,873 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:18:45,879 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-12 02:18:45,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:18:45,880 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:18:45,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:45,880 INFO L85 PathProgramCache]: Analyzing trace with hash 877723525, now seen corresponding path program 1 times [2023-11-12 02:18:45,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:45,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718741007] [2023-11-12 02:18:45,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:45,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:45,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:46,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:18:46,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:46,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-12 02:18:46,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:46,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-12 02:18:46,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:46,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-12 02:18:46,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:47,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-12 02:18:47,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:47,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-11-12 02:18:47,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:47,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-12 02:18:47,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:47,199 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-12 02:18:47,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:47,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718741007] [2023-11-12 02:18:47,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718741007] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:18:47,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149773869] [2023-11-12 02:18:47,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:47,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:18:47,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3594ef88-f4a5-404b-ab28-7ab1a6746e6a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:18:47,204 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3594ef88-f4a5-404b-ab28-7ab1a6746e6a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:18:47,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3594ef88-f4a5-404b-ab28-7ab1a6746e6a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:18:47,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:47,775 INFO L262 TraceCheckSpWp]: Trace formula consists of 2463 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 02:18:47,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:18:47,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-12 02:18:47,908 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:18:47,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149773869] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:18:47,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:18:47,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 16 [2023-11-12 02:18:47,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717761057] [2023-11-12 02:18:47,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:18:47,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:18:47,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:47,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:18:47,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2023-11-12 02:18:47,912 INFO L87 Difference]: Start difference. First operand 160 states and 217 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 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) [2023-11-12 02:18:47,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:18:47,972 INFO L93 Difference]: Finished difference Result 204 states and 270 transitions. [2023-11-12 02:18:47,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:18:47,973 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 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 60 [2023-11-12 02:18:47,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:18:47,975 INFO L225 Difference]: With dead ends: 204 [2023-11-12 02:18:47,976 INFO L226 Difference]: Without dead ends: 166 [2023-11-12 02:18:47,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2023-11-12 02:18:47,978 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 3 mSDsluCounter, 820 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1029 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:18:47,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1029 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:18:47,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2023-11-12 02:18:47,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 160. [2023-11-12 02:18:47,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 109 states have (on average 1.2477064220183487) internal successors, (136), 111 states have internal predecessors, (136), 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) [2023-11-12 02:18:47,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 217 transitions. [2023-11-12 02:18:47,997 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 217 transitions. Word has length 60 [2023-11-12 02:18:47,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:18:47,997 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 217 transitions. [2023-11-12 02:18:47,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 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) [2023-11-12 02:18:47,998 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 217 transitions. [2023-11-12 02:18:47,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-12 02:18:47,999 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:18:47,999 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] [2023-11-12 02:18:48,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3594ef88-f4a5-404b-ab28-7ab1a6746e6a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:18:48,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3594ef88-f4a5-404b-ab28-7ab1a6746e6a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-12 02:18:48,211 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:18:48,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:48,211 INFO L85 PathProgramCache]: Analyzing trace with hash -268177860, now seen corresponding path program 1 times [2023-11-12 02:18:48,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:48,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260555810] [2023-11-12 02:18:48,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:48,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:48,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:49,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:18:49,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:49,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-12 02:18:49,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:49,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-12 02:18:49,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:49,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-12 02:18:49,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:49,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-12 02:18:49,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:49,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-12 02:18:49,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:49,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-12 02:18:49,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:49,433 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 02:18:49,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:49,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260555810] [2023-11-12 02:18:49,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260555810] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:18:49,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:18:49,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-12 02:18:49,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883675280] [2023-11-12 02:18:49,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:18:49,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 02:18:49,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:49,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 02:18:49,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:18:49,437 INFO L87 Difference]: Start difference. First operand 160 states and 217 transitions. Second operand has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 6 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) [2023-11-12 02:18:50,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:18:50,349 INFO L93 Difference]: Finished difference Result 181 states and 244 transitions. [2023-11-12 02:18:50,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 02:18:50,350 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 6 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 64 [2023-11-12 02:18:50,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:18:50,352 INFO L225 Difference]: With dead ends: 181 [2023-11-12 02:18:50,352 INFO L226 Difference]: Without dead ends: 174 [2023-11-12 02:18:50,353 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 [2023-11-12 02:18:50,354 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 153 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 877 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 860 SdHoareTripleChecker+Invalid, 965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 02:18:50,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 860 Invalid, 965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 877 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 02:18:50,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2023-11-12 02:18:50,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 164. [2023-11-12 02:18:50,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 112 states have (on average 1.2410714285714286) internal successors, (139), 115 states have internal predecessors, (139), 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) [2023-11-12 02:18:50,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 227 transitions. [2023-11-12 02:18:50,390 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 227 transitions. Word has length 64 [2023-11-12 02:18:50,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:18:50,393 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 227 transitions. [2023-11-12 02:18:50,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 6 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) [2023-11-12 02:18:50,393 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 227 transitions. [2023-11-12 02:18:50,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-12 02:18:50,396 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:18:50,396 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, 1, 1] [2023-11-12 02:18:50,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:18:50,397 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:18:50,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:50,397 INFO L85 PathProgramCache]: Analyzing trace with hash 7549444, now seen corresponding path program 1 times [2023-11-12 02:18:50,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:50,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630334259] [2023-11-12 02:18:50,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:50,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:50,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:51,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:18:51,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:51,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-12 02:18:51,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:51,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-12 02:18:51,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:51,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-12 02:18:51,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:51,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-12 02:18:51,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:51,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-12 02:18:51,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:51,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-12 02:18:51,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:51,562 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:18:51,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:51,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630334259] [2023-11-12 02:18:51,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630334259] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:18:51,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:18:51,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 02:18:51,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014047424] [2023-11-12 02:18:51,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:18:51,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:18:51,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:51,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:18:51,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:18:51,566 INFO L87 Difference]: Start difference. First operand 164 states and 227 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 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) [2023-11-12 02:18:52,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:18:52,422 INFO L93 Difference]: Finished difference Result 347 states and 495 transitions. [2023-11-12 02:18:52,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:18:52,423 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 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 [2023-11-12 02:18:52,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:18:52,425 INFO L225 Difference]: With dead ends: 347 [2023-11-12 02:18:52,425 INFO L226 Difference]: Without dead ends: 199 [2023-11-12 02:18:52,426 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 [2023-11-12 02:18:52,427 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 220 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 02:18:52,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 451 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 02:18:52,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2023-11-12 02:18:52,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 169. [2023-11-12 02:18:52,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 117 states have (on average 1.2478632478632479) internal successors, (146), 120 states have internal predecessors, (146), 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) [2023-11-12 02:18:52,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 234 transitions. [2023-11-12 02:18:52,451 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 234 transitions. Word has length 68 [2023-11-12 02:18:52,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:18:52,452 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 234 transitions. [2023-11-12 02:18:52,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 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) [2023-11-12 02:18:52,454 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 234 transitions. [2023-11-12 02:18:52,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-12 02:18:52,457 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:18:52,457 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, 1, 1] [2023-11-12 02:18:52,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 02:18:52,457 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:18:52,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:52,458 INFO L85 PathProgramCache]: Analyzing trace with hash 265714882, now seen corresponding path program 1 times [2023-11-12 02:18:52,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:52,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691941244] [2023-11-12 02:18:52,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:52,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:52,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:54,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:18:54,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:54,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-12 02:18:54,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:54,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-12 02:18:54,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:54,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-12 02:18:54,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:54,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-12 02:18:54,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:54,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-12 02:18:54,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:54,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-12 02:18:54,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:54,768 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-12 02:18:54,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:54,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691941244] [2023-11-12 02:18:54,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691941244] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:18:54,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110870649] [2023-11-12 02:18:54,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:54,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:18:54,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3594ef88-f4a5-404b-ab28-7ab1a6746e6a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:18:54,771 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3594ef88-f4a5-404b-ab28-7ab1a6746e6a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:18:54,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3594ef88-f4a5-404b-ab28-7ab1a6746e6a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:18:55,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:55,328 INFO L262 TraceCheckSpWp]: Trace formula consists of 2482 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-12 02:18:55,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:18:55,423 INFO L351 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 [2023-11-12 02:18:55,819 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:55,820 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:18:55,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110870649] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:18:55,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:18:55,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 17 [2023-11-12 02:18:55,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063599962] [2023-11-12 02:18:55,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:18:55,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 02:18:55,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:55,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 02:18:55,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2023-11-12 02:18:55,824 INFO L87 Difference]: Start difference. First operand 169 states and 234 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 9 states have internal predecessors, (53), 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) [2023-11-12 02:18:59,004 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 02:19:01,671 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 02:19:03,703 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 02:19:05,739 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 02:19:08,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 02:19:10,028 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 02:19:12,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 02:19:14,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 02:19:16,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 02:19:16,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:19:16,295 INFO L93 Difference]: Finished difference Result 454 states and 625 transitions. [2023-11-12 02:19:16,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 02:19:16,296 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 9 states have internal predecessors, (53), 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 68 [2023-11-12 02:19:16,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:19:16,299 INFO L225 Difference]: With dead ends: 454 [2023-11-12 02:19:16,299 INFO L226 Difference]: Without dead ends: 301 [2023-11-12 02:19:16,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2023-11-12 02:19:16,303 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 212 mSDsluCounter, 1384 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 18 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 1666 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:19:16,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 1666 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 708 Invalid, 9 Unknown, 0 Unchecked, 20.2s Time] [2023-11-12 02:19:16,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2023-11-12 02:19:16,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 288. [2023-11-12 02:19:16,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 203 states have (on average 1.2660098522167487) internal successors, (257), 208 states have internal predecessors, (257), 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) [2023-11-12 02:19:16,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 391 transitions. [2023-11-12 02:19:16,343 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 391 transitions. Word has length 68 [2023-11-12 02:19:16,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:19:16,344 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 391 transitions. [2023-11-12 02:19:16,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 9 states have internal predecessors, (53), 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) [2023-11-12 02:19:16,344 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 391 transitions. [2023-11-12 02:19:16,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-12 02:19:16,350 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:19:16,351 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:19:16,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3594ef88-f4a5-404b-ab28-7ab1a6746e6a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:19:16,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3594ef88-f4a5-404b-ab28-7ab1a6746e6a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-12 02:19:16,561 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:19:16,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:19:16,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1530819000, now seen corresponding path program 1 times [2023-11-12 02:19:16,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:19:16,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870014077] [2023-11-12 02:19:16,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:19:16,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:19:16,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:19:17,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:19:17,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:19:17,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-12 02:19:17,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:19:17,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-12 02:19:17,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:19:17,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-12 02:19:17,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:19:17,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-12 02:19:17,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:19:17,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-12 02:19:17,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:19:17,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-11-12 02:19:17,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:19:17,801 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 02:19:17,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:19:17,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870014077] [2023-11-12 02:19:17,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870014077] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:19:17,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98704798] [2023-11-12 02:19:17,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:19:17,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:19:17,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3594ef88-f4a5-404b-ab28-7ab1a6746e6a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:19:17,803 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3594ef88-f4a5-404b-ab28-7ab1a6746e6a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:19:17,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3594ef88-f4a5-404b-ab28-7ab1a6746e6a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:19:18,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:19:18,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 2489 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 02:19:18,436 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:19:18,479 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:19:18,480 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:19:18,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98704798] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:19:18,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:19:18,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 12 [2023-11-12 02:19:18,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175764309] [2023-11-12 02:19:18,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:19:18,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 02:19:18,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:19:18,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 02:19:18,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:19:18,483 INFO L87 Difference]: Start difference. First operand 288 states and 391 transitions. Second operand has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 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) [2023-11-12 02:19:18,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:19:18,662 INFO L93 Difference]: Finished difference Result 576 states and 796 transitions. [2023-11-12 02:19:18,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 02:19:18,663 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 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 72 [2023-11-12 02:19:18,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:19:18,667 INFO L225 Difference]: With dead ends: 576 [2023-11-12 02:19:18,667 INFO L226 Difference]: Without dead ends: 304 [2023-11-12 02:19:18,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-11-12 02:19:18,670 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 13 mSDsluCounter, 1339 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1536 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:19:18,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 1536 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:19:18,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2023-11-12 02:19:18,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 293. [2023-11-12 02:19:18,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 207 states have (on average 1.2608695652173914) internal successors, (261), 213 states have internal predecessors, (261), 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) [2023-11-12 02:19:18,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 401 transitions. [2023-11-12 02:19:18,703 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 401 transitions. Word has length 72 [2023-11-12 02:19:18,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:19:18,703 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 401 transitions. [2023-11-12 02:19:18,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 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) [2023-11-12 02:19:18,704 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 401 transitions. [2023-11-12 02:19:18,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-12 02:19:18,705 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:19:18,705 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:19:18,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3594ef88-f4a5-404b-ab28-7ab1a6746e6a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:19:18,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3594ef88-f4a5-404b-ab28-7ab1a6746e6a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:19:18,917 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:19:18,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:19:18,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1019185037, now seen corresponding path program 1 times [2023-11-12 02:19:18,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:19:18,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855603516] [2023-11-12 02:19:18,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:19:18,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:19:19,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:19:19,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:19:19,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:19:19,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-12 02:19:19,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:19:19,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-12 02:19:19,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:19:19,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-12 02:19:19,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:19:19,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-12 02:19:19,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:19:19,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-12 02:19:19,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:19:19,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-11-12 02:19:19,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:19:19,339 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 02:19:19,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:19:19,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855603516] [2023-11-12 02:19:19,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855603516] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:19:19,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47541369] [2023-11-12 02:19:19,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:19:19,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:19:19,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3594ef88-f4a5-404b-ab28-7ab1a6746e6a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:19:19,342 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3594ef88-f4a5-404b-ab28-7ab1a6746e6a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:19:19,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3594ef88-f4a5-404b-ab28-7ab1a6746e6a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:19:19,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:19:19,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 2494 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:19:19,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:19:19,956 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-12 02:19:19,956 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:19:19,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47541369] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:19:19,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:19:19,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2023-11-12 02:19:19,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583484183] [2023-11-12 02:19:19,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:19:19,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:19:19,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:19:19,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:19:19,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:19:19,959 INFO L87 Difference]: Start difference. First operand 293 states and 401 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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) [2023-11-12 02:19:20,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:19:20,014 INFO L93 Difference]: Finished difference Result 583 states and 809 transitions. [2023-11-12 02:19:20,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:19:20,015 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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 74 [2023-11-12 02:19:20,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:19:20,018 INFO L225 Difference]: With dead ends: 583 [2023-11-12 02:19:20,018 INFO L226 Difference]: Without dead ends: 306 [2023-11-12 02:19:20,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:19:20,023 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 9 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:19:20,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 609 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:19:20,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2023-11-12 02:19:20,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 297. [2023-11-12 02:19:20,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 211 states have (on average 1.2559241706161137) internal successors, (265), 217 states have internal predecessors, (265), 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) [2023-11-12 02:19:20,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 405 transitions. [2023-11-12 02:19:20,061 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 405 transitions. Word has length 74 [2023-11-12 02:19:20,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:19:20,062 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 405 transitions. [2023-11-12 02:19:20,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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) [2023-11-12 02:19:20,063 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 405 transitions. [2023-11-12 02:19:20,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-12 02:19:20,064 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:19:20,064 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:19:20,081 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3594ef88-f4a5-404b-ab28-7ab1a6746e6a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-12 02:19:20,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3594ef88-f4a5-404b-ab28-7ab1a6746e6a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:19:20,282 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:19:20,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:19:20,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1357293521, now seen corresponding path program 1 times [2023-11-12 02:19:20,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:19:20,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067653281] [2023-11-12 02:19:20,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:19:20,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:19:20,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:19:20,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:19:20,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:19:20,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-12 02:19:20,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:19:20,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-12 02:19:20,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:19:20,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-12 02:19:20,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:19:20,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-12 02:19:20,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:19:20,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-12 02:19:20,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:19:20,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-11-12 02:19:20,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:19:20,700 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-12 02:19:20,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:19:20,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067653281] [2023-11-12 02:19:20,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067653281] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:19:20,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642736738] [2023-11-12 02:19:20,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:19:20,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:19:20,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3594ef88-f4a5-404b-ab28-7ab1a6746e6a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:19:20,702 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3594ef88-f4a5-404b-ab28-7ab1a6746e6a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:19:20,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3594ef88-f4a5-404b-ab28-7ab1a6746e6a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:19:21,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:19:21,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 2496 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:19:21,344 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:19:21,361 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 02:19:21,362 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:19:21,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642736738] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:19:21,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:19:21,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2023-11-12 02:19:21,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287380378] [2023-11-12 02:19:21,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:19:21,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:19:21,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:19:21,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:19:21,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:19:21,365 INFO L87 Difference]: Start difference. First operand 297 states and 405 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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) [2023-11-12 02:19:21,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:19:21,417 INFO L93 Difference]: Finished difference Result 612 states and 854 transitions. [2023-11-12 02:19:21,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:19:21,417 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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 74 [2023-11-12 02:19:21,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:19:21,421 INFO L225 Difference]: With dead ends: 612 [2023-11-12 02:19:21,422 INFO L226 Difference]: Without dead ends: 331 [2023-11-12 02:19:21,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:19:21,424 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 28 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:19:21,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 624 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:19:21,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2023-11-12 02:19:21,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 297. [2023-11-12 02:19:21,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 211 states have (on average 1.2464454976303319) internal successors, (263), 217 states have internal predecessors, (263), 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) [2023-11-12 02:19:21,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 403 transitions. [2023-11-12 02:19:21,454 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 403 transitions. Word has length 74 [2023-11-12 02:19:21,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:19:21,455 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 403 transitions. [2023-11-12 02:19:21,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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) [2023-11-12 02:19:21,455 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 403 transitions. [2023-11-12 02:19:21,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-12 02:19:21,457 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:19:21,457 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:19:21,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3594ef88-f4a5-404b-ab28-7ab1a6746e6a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:19:21,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3594ef88-f4a5-404b-ab28-7ab1a6746e6a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:19:21,674 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:19:21,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:19:21,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1341774803, now seen corresponding path program 1 times [2023-11-12 02:19:21,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:19:21,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142209427] [2023-11-12 02:19:21,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:19:21,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:19:22,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat