./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_array_list_copy_harness_negated.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_array_list_copy_harness_negated.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 40c03b884ddbc3cb1e032cd6f8f52748216dc2b56f8e56ff0fe620c91f6aac52 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:18:27,379 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:18:27,443 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-64bit-Automizer_Default.epf [2023-11-29 00:18:27,449 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:18:27,450 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:18:27,474 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:18:27,475 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:18:27,475 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:18:27,476 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:18:27,477 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:18:27,477 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:18:27,478 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:18:27,479 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:18:27,479 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:18:27,480 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:18:27,480 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:18:27,481 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 00:18:27,481 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:18:27,482 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:18:27,482 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 00:18:27,483 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:18:27,484 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 00:18:27,484 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 00:18:27,484 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:18:27,485 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:18:27,485 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:18:27,486 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:18:27,486 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:18:27,487 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:18:27,487 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:18:27,488 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:18:27,488 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 00:18:27,488 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 00:18:27,488 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 00:18:27,489 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:18:27,489 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:18:27,489 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 00:18:27,489 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:18:27,489 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:18:27,489 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_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 40c03b884ddbc3cb1e032cd6f8f52748216dc2b56f8e56ff0fe620c91f6aac52 [2023-11-29 00:18:27,689 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:18:27,708 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:18:27,711 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:18:27,712 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:18:27,712 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:18:27,713 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/aws-c-common/aws_array_list_copy_harness_negated.i [2023-11-29 00:18:30,402 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:18:30,781 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:18:30,781 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/sv-benchmarks/c/aws-c-common/aws_array_list_copy_harness_negated.i [2023-11-29 00:18:30,810 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/data/b69bc7cf8/82dd9cedcd684c719746bfc6e5cd27d4/FLAG212e1fa2c [2023-11-29 00:18:30,824 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/data/b69bc7cf8/82dd9cedcd684c719746bfc6e5cd27d4 [2023-11-29 00:18:30,827 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:18:30,828 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:18:30,830 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:18:30,830 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:18:30,835 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:18:30,836 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:18:30" (1/1) ... [2023-11-29 00:18:30,837 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63080f6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:18:30, skipping insertion in model container [2023-11-29 00:18:30,837 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:18:30" (1/1) ... [2023-11-29 00:18:30,950 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:18:31,194 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_01d1c89e-c2fd-496c-b788-73b649f8e60e/sv-benchmarks/c/aws-c-common/aws_array_list_copy_harness_negated.i[4493,4506] [2023-11-29 00:18:31,203 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_01d1c89e-c2fd-496c-b788-73b649f8e60e/sv-benchmarks/c/aws-c-common/aws_array_list_copy_harness_negated.i[4553,4566] [2023-11-29 00:18:32,178 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 00:18:32,179 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 00:18:32,179 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 00:18:32,181 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 00:18:32,182 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 00:18:32,196 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 00:18:32,197 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 00:18:32,199 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 00:18:32,200 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 00:18:32,202 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 00:18:32,203 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 00:18:32,204 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 00:18:32,204 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 00:18:32,685 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-29 00:18:32,686 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-29 00:18:32,687 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-29 00:18:32,688 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-29 00:18:32,690 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-29 00:18:32,690 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-29 00:18:32,691 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-29 00:18:32,691 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-29 00:18:32,692 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-29 00:18:32,693 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-29 00:18:32,825 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 00:18:32,825 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 00:18:32,829 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 00:18:32,836 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 00:18:32,888 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:18:32,917 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 00:18:32,929 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_01d1c89e-c2fd-496c-b788-73b649f8e60e/sv-benchmarks/c/aws-c-common/aws_array_list_copy_harness_negated.i[4493,4506] [2023-11-29 00:18:32,929 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_01d1c89e-c2fd-496c-b788-73b649f8e60e/sv-benchmarks/c/aws-c-common/aws_array_list_copy_harness_negated.i[4553,4566] [2023-11-29 00:18:32,978 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 00:18:32,979 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 00:18:32,979 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 00:18:32,980 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 00:18:32,980 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 00:18:32,988 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 00:18:32,988 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 00:18:32,990 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 00:18:32,990 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 00:18:32,991 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 00:18:32,992 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 00:18:32,993 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 00:18:32,993 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 00:18:33,027 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-29 00:18:33,028 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-29 00:18:33,029 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-29 00:18:33,029 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-29 00:18:33,030 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-29 00:18:33,031 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-29 00:18:33,031 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-29 00:18:33,032 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-29 00:18:33,032 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-29 00:18:33,032 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-29 00:18:33,058 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 00:18:33,058 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 00:18:33,059 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 00:18:33,065 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 00:18:33,071 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7743-7754] [2023-11-29 00:18:33,087 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:18:33,358 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 00:18:33,358 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 00:18:33,359 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 00:18:33,359 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 00:18:33,359 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 00:18:33,359 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 00:18:33,359 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 00:18:33,359 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 00:18:33,360 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 00:18:33,360 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 00:18:33,360 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 00:18:33,360 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 00:18:33,360 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 00:18:33,361 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 00:18:33,361 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 00:18:33,368 INFO L206 MainTranslator]: Completed translation [2023-11-29 00:18:33,368 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:18:33 WrapperNode [2023-11-29 00:18:33,368 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:18:33,369 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 00:18:33,369 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 00:18:33,369 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 00:18:33,377 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:18:33" (1/1) ... [2023-11-29 00:18:33,443 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:18:33" (1/1) ... [2023-11-29 00:18:33,508 INFO L138 Inliner]: procedures = 690, calls = 1674, calls flagged for inlining = 52, calls inlined = 7, statements flattened = 696 [2023-11-29 00:18:33,509 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 00:18:33,510 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 00:18:33,510 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 00:18:33,510 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 00:18:33,521 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:18:33" (1/1) ... [2023-11-29 00:18:33,521 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:18:33" (1/1) ... [2023-11-29 00:18:33,529 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:18:33" (1/1) ... [2023-11-29 00:18:33,601 INFO L175 MemorySlicer]: Split 304 memory accesses to 6 slices as follows [2, 236, 7, 9, 47, 3]. 78 percent of accesses are in the largest equivalence class. The 247 initializations are split as follows [2, 236, 5, 1, 0, 3]. The 9 writes are split as follows [0, 0, 1, 1, 7, 0]. [2023-11-29 00:18:33,601 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:18:33" (1/1) ... [2023-11-29 00:18:33,602 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:18:33" (1/1) ... [2023-11-29 00:18:33,629 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:18:33" (1/1) ... [2023-11-29 00:18:33,633 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:18:33" (1/1) ... [2023-11-29 00:18:33,642 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:18:33" (1/1) ... [2023-11-29 00:18:33,648 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:18:33" (1/1) ... [2023-11-29 00:18:33,661 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 00:18:33,662 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 00:18:33,662 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 00:18:33,662 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 00:18:33,663 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:18:33" (1/1) ... [2023-11-29 00:18:33,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:18:33,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:18:33,691 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 00:18:33,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 00:18:33,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 00:18:33,724 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_bounded [2023-11-29 00:18:33,724 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_bounded [2023-11-29 00:18:33,724 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2023-11-29 00:18:33,724 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2023-11-29 00:18:33,725 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-29 00:18:33,725 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-29 00:18:33,725 INFO L130 BoogieDeclarations]: Found specification of procedure aws_allocator_is_valid [2023-11-29 00:18:33,725 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_allocator_is_valid [2023-11-29 00:18:33,725 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 00:18:33,725 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 00:18:33,725 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 00:18:33,725 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 00:18:33,725 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-29 00:18:33,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-29 00:18:33,726 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-29 00:18:33,726 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-29 00:18:33,726 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-29 00:18:33,726 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-29 00:18:33,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 00:18:33,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 00:18:33,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-29 00:18:33,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-29 00:18:33,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-29 00:18:33,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-29 00:18:33,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2023-11-29 00:18:33,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#5 [2023-11-29 00:18:33,727 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_impl [2023-11-29 00:18:33,727 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_impl [2023-11-29 00:18:33,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 00:18:33,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 00:18:33,727 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-29 00:18:33,727 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-29 00:18:33,728 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-11-29 00:18:33,728 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-11-29 00:18:33,728 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2023-11-29 00:18:33,728 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2023-11-29 00:18:33,728 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2023-11-29 00:18:33,728 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2023-11-29 00:18:33,728 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 00:18:33,728 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 00:18:33,728 INFO L130 BoogieDeclarations]: Found specification of procedure my_memcpy [2023-11-29 00:18:33,729 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memcpy [2023-11-29 00:18:33,729 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_acquire [2023-11-29 00:18:33,729 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_acquire [2023-11-29 00:18:33,729 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 00:18:33,729 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-29 00:18:33,729 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-29 00:18:33,729 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-29 00:18:33,729 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-29 00:18:33,729 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2023-11-29 00:18:33,729 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#5 [2023-11-29 00:18:33,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-11-29 00:18:33,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-11-29 00:18:33,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-11-29 00:18:33,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2023-11-29 00:18:33,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2023-11-29 00:18:33,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#5 [2023-11-29 00:18:33,730 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-11-29 00:18:33,730 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-11-29 00:18:33,730 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-11-29 00:18:33,730 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-11-29 00:18:33,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 00:18:33,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 00:18:33,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 00:18:33,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 00:18:33,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-29 00:18:33,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-29 00:18:33,731 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_array_list_has_allocated_data_member [2023-11-29 00:18:33,731 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_array_list_has_allocated_data_member [2023-11-29 00:18:33,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 00:18:33,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 00:18:33,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 00:18:33,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 00:18:33,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 00:18:33,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-29 00:18:34,036 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 00:18:34,038 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 00:18:34,727 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 00:18:34,867 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 00:18:34,867 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-29 00:18:34,868 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:18:34 BoogieIcfgContainer [2023-11-29 00:18:34,868 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 00:18:34,870 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 00:18:34,870 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 00:18:34,874 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 00:18:34,874 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 12:18:30" (1/3) ... [2023-11-29 00:18:34,874 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c6e187e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:18:34, skipping insertion in model container [2023-11-29 00:18:34,875 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:18:33" (2/3) ... [2023-11-29 00:18:34,875 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c6e187e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:18:34, skipping insertion in model container [2023-11-29 00:18:34,875 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:18:34" (3/3) ... [2023-11-29 00:18:34,876 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_array_list_copy_harness_negated.i [2023-11-29 00:18:34,895 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 00:18:34,895 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 00:18:34,948 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:18:34,955 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;@2388750b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:18:34,955 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 00:18:34,959 INFO L276 IsEmpty]: Start isEmpty. Operand has 191 states, 101 states have (on average 1.2178217821782178) internal successors, (123), 102 states have internal predecessors, (123), 71 states have call successors, (71), 17 states have call predecessors, (71), 17 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) [2023-11-29 00:18:34,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-29 00:18:34,977 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:18:34,978 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:18:34,979 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:18:34,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:18:34,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1350258042, now seen corresponding path program 1 times [2023-11-29 00:18:34,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:18:34,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665874444] [2023-11-29 00:18:34,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:18:34,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:18:35,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:18:35,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:18:35,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665874444] [2023-11-29 00:18:35,419 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 00:18:35,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052593328] [2023-11-29 00:18:35,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:18:35,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:18:35,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:18:35,421 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:18:35,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 00:18:36,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:18:36,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 2341 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 00:18:36,053 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:18:36,095 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2023-11-29 00:18:36,095 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:18:36,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052593328] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:18:36,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:18:36,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:18:36,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241387961] [2023-11-29 00:18:36,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:18:36,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 00:18:36,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:18:36,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 00:18:36,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 00:18:36,134 INFO L87 Difference]: Start difference. First operand has 191 states, 101 states have (on average 1.2178217821782178) internal successors, (123), 102 states have internal predecessors, (123), 71 states have call successors, (71), 17 states have call predecessors, (71), 17 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) Second operand has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2023-11-29 00:18:36,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:18:36,455 INFO L93 Difference]: Finished difference Result 379 states and 568 transitions. [2023-11-29 00:18:36,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 00:18:36,458 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 138 [2023-11-29 00:18:36,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:18:36,469 INFO L225 Difference]: With dead ends: 379 [2023-11-29 00:18:36,470 INFO L226 Difference]: Without dead ends: 189 [2023-11-29 00:18:36,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 00:18:36,480 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:18:36,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 248 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 00:18:36,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-11-29 00:18:36,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2023-11-29 00:18:36,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 100 states have (on average 1.2) internal successors, (120), 101 states have internal predecessors, (120), 71 states have call successors, (71), 17 states have call predecessors, (71), 17 states have return successors, (70), 70 states have call predecessors, (70), 70 states have call successors, (70) [2023-11-29 00:18:36,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 261 transitions. [2023-11-29 00:18:36,542 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 261 transitions. Word has length 138 [2023-11-29 00:18:36,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:18:36,543 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 261 transitions. [2023-11-29 00:18:36,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2023-11-29 00:18:36,544 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 261 transitions. [2023-11-29 00:18:36,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-29 00:18:36,548 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:18:36,548 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:18:36,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 00:18:36,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-29 00:18:36,753 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:18:36,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:18:36,753 INFO L85 PathProgramCache]: Analyzing trace with hash 2042562890, now seen corresponding path program 1 times [2023-11-29 00:18:36,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:18:36,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362502306] [2023-11-29 00:18:36,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:18:36,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:18:36,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:18:36,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:18:36,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362502306] [2023-11-29 00:18:36,922 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 00:18:36,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264717166] [2023-11-29 00:18:36,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:18:36,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:18:36,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:18:36,923 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:18:36,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 00:18:37,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:18:37,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 2341 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:18:37,458 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:18:37,484 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2023-11-29 00:18:37,484 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:18:37,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264717166] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:18:37,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:18:37,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:18:37,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225275719] [2023-11-29 00:18:37,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:18:37,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:18:37,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:18:37,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:18:37,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:18:37,488 INFO L87 Difference]: Start difference. First operand 189 states and 261 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2023-11-29 00:18:37,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:18:37,960 INFO L93 Difference]: Finished difference Result 374 states and 518 transitions. [2023-11-29 00:18:37,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:18:37,961 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 138 [2023-11-29 00:18:37,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:18:37,963 INFO L225 Difference]: With dead ends: 374 [2023-11-29 00:18:37,963 INFO L226 Difference]: Without dead ends: 190 [2023-11-29 00:18:37,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:18:37,966 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 0 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:18:37,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 488 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:18:37,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2023-11-29 00:18:37,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2023-11-29 00:18:37,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 101 states have (on average 1.198019801980198) internal successors, (121), 102 states have internal predecessors, (121), 71 states have call successors, (71), 17 states have call predecessors, (71), 17 states have return successors, (70), 70 states have call predecessors, (70), 70 states have call successors, (70) [2023-11-29 00:18:37,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 262 transitions. [2023-11-29 00:18:37,991 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 262 transitions. Word has length 138 [2023-11-29 00:18:37,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:18:37,991 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 262 transitions. [2023-11-29 00:18:37,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2023-11-29 00:18:37,992 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 262 transitions. [2023-11-29 00:18:37,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-29 00:18:37,997 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:18:37,997 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:18:38,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-29 00:18:38,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:18:38,198 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:18:38,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:18:38,199 INFO L85 PathProgramCache]: Analyzing trace with hash 595157966, now seen corresponding path program 1 times [2023-11-29 00:18:38,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:18:38,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687473804] [2023-11-29 00:18:38,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:18:38,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:18:38,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:18:38,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:18:38,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687473804] [2023-11-29 00:18:38,397 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 00:18:38,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856966866] [2023-11-29 00:18:38,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:18:38,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:18:38,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:18:38,399 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:18:38,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 00:18:38,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:18:38,917 INFO L262 TraceCheckSpWp]: Trace formula consists of 2347 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 00:18:38,923 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:18:38,982 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2023-11-29 00:18:38,983 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:18:38,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856966866] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:18:38,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:18:38,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:18:38,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030595804] [2023-11-29 00:18:38,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:18:38,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:18:38,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:18:38,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:18:38,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:18:38,986 INFO L87 Difference]: Start difference. First operand 190 states and 262 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2023-11-29 00:18:39,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:18:39,498 INFO L93 Difference]: Finished difference Result 376 states and 529 transitions. [2023-11-29 00:18:39,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:18:39,498 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) Word has length 138 [2023-11-29 00:18:39,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:18:39,502 INFO L225 Difference]: With dead ends: 376 [2023-11-29 00:18:39,502 INFO L226 Difference]: Without dead ends: 192 [2023-11-29 00:18:39,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:18:39,504 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 58 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:18:39,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 771 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 00:18:39,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-11-29 00:18:39,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2023-11-29 00:18:39,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 102 states have (on average 1.196078431372549) internal successors, (122), 104 states have internal predecessors, (122), 71 states have call successors, (71), 17 states have call predecessors, (71), 18 states have return successors, (82), 70 states have call predecessors, (82), 70 states have call successors, (82) [2023-11-29 00:18:39,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 275 transitions. [2023-11-29 00:18:39,529 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 275 transitions. Word has length 138 [2023-11-29 00:18:39,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:18:39,529 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 275 transitions. [2023-11-29 00:18:39,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2023-11-29 00:18:39,530 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 275 transitions. [2023-11-29 00:18:39,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-11-29 00:18:39,532 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:18:39,532 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:18:39,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-29 00:18:39,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:18:39,737 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:18:39,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:18:39,737 INFO L85 PathProgramCache]: Analyzing trace with hash 881858080, now seen corresponding path program 1 times [2023-11-29 00:18:39,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:18:39,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491853259] [2023-11-29 00:18:39,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:18:39,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:18:39,830 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:18:39,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [96521803] [2023-11-29 00:18:39,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:18:39,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:18:39,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:18:39,831 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:18:39,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 00:18:40,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:18:40,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 2486 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 00:18:40,381 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:18:40,439 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 174 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2023-11-29 00:18:40,439 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:18:40,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:18:40,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491853259] [2023-11-29 00:18:40,440 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:18:40,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96521803] [2023-11-29 00:18:40,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96521803] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:18:40,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:18:40,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:18:40,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905903026] [2023-11-29 00:18:40,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:18:40,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:18:40,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:18:40,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:18:40,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:18:40,443 INFO L87 Difference]: Start difference. First operand 192 states and 275 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 3 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2023-11-29 00:18:40,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:18:40,908 INFO L93 Difference]: Finished difference Result 352 states and 502 transitions. [2023-11-29 00:18:40,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:18:40,909 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 3 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) Word has length 151 [2023-11-29 00:18:40,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:18:40,912 INFO L225 Difference]: With dead ends: 352 [2023-11-29 00:18:40,912 INFO L226 Difference]: Without dead ends: 192 [2023-11-29 00:18:40,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:18:40,914 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 56 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:18:40,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 774 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:18:40,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-11-29 00:18:40,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2023-11-29 00:18:40,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 102 states have (on average 1.196078431372549) internal successors, (122), 104 states have internal predecessors, (122), 71 states have call successors, (71), 17 states have call predecessors, (71), 18 states have return successors, (80), 70 states have call predecessors, (80), 70 states have call successors, (80) [2023-11-29 00:18:40,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 273 transitions. [2023-11-29 00:18:40,939 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 273 transitions. Word has length 151 [2023-11-29 00:18:40,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:18:40,940 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 273 transitions. [2023-11-29 00:18:40,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 3 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2023-11-29 00:18:40,940 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 273 transitions. [2023-11-29 00:18:40,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-11-29 00:18:40,943 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:18:40,944 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:18:40,952 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 00:18:41,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:18:41,145 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:18:41,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:18:41,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1555683408, now seen corresponding path program 2 times [2023-11-29 00:18:41,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:18:41,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949770974] [2023-11-29 00:18:41,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:18:41,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:18:41,240 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:18:41,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1108680464] [2023-11-29 00:18:41,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:18:41,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:18:41,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:18:41,245 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:18:41,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 00:18:41,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 00:18:41,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:18:41,693 INFO L262 TraceCheckSpWp]: Trace formula consists of 1913 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 00:18:41,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:18:41,740 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2023-11-29 00:18:41,741 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:18:41,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:18:41,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949770974] [2023-11-29 00:18:41,741 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:18:41,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108680464] [2023-11-29 00:18:41,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108680464] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:18:41,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:18:41,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:18:41,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615406803] [2023-11-29 00:18:41,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:18:41,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:18:41,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:18:41,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:18:41,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:18:41,744 INFO L87 Difference]: Start difference. First operand 192 states and 273 transitions. Second operand has 5 states, 4 states have (on average 11.25) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 2 states have call successors, (24) [2023-11-29 00:18:42,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:18:42,264 INFO L93 Difference]: Finished difference Result 246 states and 344 transitions. [2023-11-29 00:18:42,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:18:42,264 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 11.25) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 2 states have call successors, (24) Word has length 164 [2023-11-29 00:18:42,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:18:42,267 INFO L225 Difference]: With dead ends: 246 [2023-11-29 00:18:42,267 INFO L226 Difference]: Without dead ends: 196 [2023-11-29 00:18:42,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:18:42,268 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 1 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:18:42,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 974 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 00:18:42,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2023-11-29 00:18:42,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2023-11-29 00:18:42,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 105 states have (on average 1.1904761904761905) internal successors, (125), 107 states have internal predecessors, (125), 71 states have call successors, (71), 17 states have call predecessors, (71), 19 states have return successors, (82), 71 states have call predecessors, (82), 70 states have call successors, (82) [2023-11-29 00:18:42,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 278 transitions. [2023-11-29 00:18:42,285 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 278 transitions. Word has length 164 [2023-11-29 00:18:42,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:18:42,286 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 278 transitions. [2023-11-29 00:18:42,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 11.25) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 2 states have call successors, (24) [2023-11-29 00:18:42,286 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 278 transitions. [2023-11-29 00:18:42,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-11-29 00:18:42,289 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:18:42,289 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:18:42,297 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 00:18:42,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:18:42,490 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:18:42,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:18:42,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1147063479, now seen corresponding path program 1 times [2023-11-29 00:18:42,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:18:42,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669566012] [2023-11-29 00:18:42,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:18:42,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:18:42,600 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:18:42,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [19771266] [2023-11-29 00:18:42,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:18:42,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:18:42,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:18:42,601 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:18:42,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 00:18:43,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:18:43,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 2624 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 00:18:43,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:18:43,230 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-11-29 00:18:43,230 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:18:43,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:18:43,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669566012] [2023-11-29 00:18:43,231 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:18:43,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19771266] [2023-11-29 00:18:43,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19771266] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:18:43,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:18:43,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 00:18:43,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415943629] [2023-11-29 00:18:43,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:18:43,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:18:43,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:18:43,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:18:43,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:18:43,233 INFO L87 Difference]: Start difference. First operand 196 states and 278 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 4 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2023-11-29 00:18:44,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:18:44,374 INFO L93 Difference]: Finished difference Result 349 states and 491 transitions. [2023-11-29 00:18:44,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:18:44,375 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 4 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 168 [2023-11-29 00:18:44,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:18:44,378 INFO L225 Difference]: With dead ends: 349 [2023-11-29 00:18:44,378 INFO L226 Difference]: Without dead ends: 196 [2023-11-29 00:18:44,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-29 00:18:44,380 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 84 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 922 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:18:44,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 922 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 00:18:44,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2023-11-29 00:18:44,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2023-11-29 00:18:44,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 105 states have (on average 1.1904761904761905) internal successors, (125), 107 states have internal predecessors, (125), 71 states have call successors, (71), 17 states have call predecessors, (71), 19 states have return successors, (77), 71 states have call predecessors, (77), 70 states have call successors, (77) [2023-11-29 00:18:44,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 273 transitions. [2023-11-29 00:18:44,396 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 273 transitions. Word has length 168 [2023-11-29 00:18:44,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:18:44,397 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 273 transitions. [2023-11-29 00:18:44,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 4 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2023-11-29 00:18:44,397 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 273 transitions. [2023-11-29 00:18:44,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2023-11-29 00:18:44,400 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:18:44,400 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:18:44,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 00:18:44,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 00:18:44,601 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:18:44,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:18:44,601 INFO L85 PathProgramCache]: Analyzing trace with hash 884444917, now seen corresponding path program 1 times [2023-11-29 00:18:44,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:18:44,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590482280] [2023-11-29 00:18:44,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:18:44,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:18:44,688 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:18:44,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1510990874] [2023-11-29 00:18:44,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:18:44,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:18:44,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:18:44,690 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:18:44,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 00:18:45,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:18:45,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 2776 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 00:18:45,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:18:45,318 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2023-11-29 00:18:45,319 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:18:45,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:18:45,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590482280] [2023-11-29 00:18:45,319 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:18:45,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510990874] [2023-11-29 00:18:45,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510990874] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:18:45,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:18:45,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 00:18:45,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770630751] [2023-11-29 00:18:45,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:18:45,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:18:45,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:18:45,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:18:45,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:18:45,322 INFO L87 Difference]: Start difference. First operand 196 states and 273 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 4 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2023-11-29 00:18:46,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:18:46,063 INFO L93 Difference]: Finished difference Result 346 states and 476 transitions. [2023-11-29 00:18:46,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:18:46,063 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 4 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 180 [2023-11-29 00:18:46,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:18:46,066 INFO L225 Difference]: With dead ends: 346 [2023-11-29 00:18:46,066 INFO L226 Difference]: Without dead ends: 194 [2023-11-29 00:18:46,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-29 00:18:46,067 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 83 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 920 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 00:18:46,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 920 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 00:18:46,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2023-11-29 00:18:46,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2023-11-29 00:18:46,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 104 states have (on average 1.1826923076923077) internal successors, (123), 105 states have internal predecessors, (123), 71 states have call successors, (71), 17 states have call predecessors, (71), 18 states have return successors, (72), 71 states have call predecessors, (72), 70 states have call successors, (72) [2023-11-29 00:18:46,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 266 transitions. [2023-11-29 00:18:46,082 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 266 transitions. Word has length 180 [2023-11-29 00:18:46,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:18:46,083 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 266 transitions. [2023-11-29 00:18:46,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 4 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2023-11-29 00:18:46,083 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 266 transitions. [2023-11-29 00:18:46,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2023-11-29 00:18:46,086 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:18:46,086 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:18:46,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-29 00:18:46,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:18:46,293 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:18:46,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:18:46,293 INFO L85 PathProgramCache]: Analyzing trace with hash 861264371, now seen corresponding path program 1 times [2023-11-29 00:18:46,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:18:46,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637211966] [2023-11-29 00:18:46,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:18:46,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:18:46,388 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:18:46,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1051811258] [2023-11-29 00:18:46,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:18:46,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:18:46,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:18:46,390 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:18:46,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 00:18:47,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:18:47,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 2915 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 00:18:47,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:18:47,066 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 407 trivial. 0 not checked. [2023-11-29 00:18:47,066 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:18:47,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:18:47,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637211966] [2023-11-29 00:18:47,067 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:18:47,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051811258] [2023-11-29 00:18:47,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051811258] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:18:47,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:18:47,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 00:18:47,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55271432] [2023-11-29 00:18:47,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:18:47,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:18:47,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:18:47,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:18:47,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:18:47,068 INFO L87 Difference]: Start difference. First operand 194 states and 266 transitions. Second operand has 6 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 1 states have call successors, (24) [2023-11-29 00:18:47,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:18:47,702 INFO L93 Difference]: Finished difference Result 245 states and 330 transitions. [2023-11-29 00:18:47,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:18:47,703 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 1 states have call successors, (24) Word has length 193 [2023-11-29 00:18:47,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:18:47,705 INFO L225 Difference]: With dead ends: 245 [2023-11-29 00:18:47,705 INFO L226 Difference]: Without dead ends: 203 [2023-11-29 00:18:47,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:18:47,706 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 4 mSDsluCounter, 965 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1208 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:18:47,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 1208 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 00:18:47,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2023-11-29 00:18:47,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 196. [2023-11-29 00:18:47,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 106 states have (on average 1.179245283018868) internal successors, (125), 107 states have internal predecessors, (125), 71 states have call successors, (71), 17 states have call predecessors, (71), 18 states have return successors, (72), 71 states have call predecessors, (72), 70 states have call successors, (72) [2023-11-29 00:18:47,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 268 transitions. [2023-11-29 00:18:47,720 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 268 transitions. Word has length 193 [2023-11-29 00:18:47,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:18:47,721 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 268 transitions. [2023-11-29 00:18:47,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 1 states have call successors, (24) [2023-11-29 00:18:47,721 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 268 transitions. [2023-11-29 00:18:47,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2023-11-29 00:18:47,725 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:18:47,725 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:18:47,736 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 00:18:47,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:18:47,926 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:18:47,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:18:47,926 INFO L85 PathProgramCache]: Analyzing trace with hash -536578057, now seen corresponding path program 1 times [2023-11-29 00:18:47,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:18:47,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432544224] [2023-11-29 00:18:47,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:18:47,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:18:48,016 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:18:48,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1201936323] [2023-11-29 00:18:48,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:18:48,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:18:48,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:18:48,017 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:18:48,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 00:18:48,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:18:48,607 INFO L262 TraceCheckSpWp]: Trace formula consists of 3041 conjuncts, 72 conjunts are in the unsatisfiable core [2023-11-29 00:18:48,615 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:18:48,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-29 00:18:49,455 INFO L349 Elim1Store]: treesize reduction 21, result has 30.0 percent of original size [2023-11-29 00:18:49,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 25 [2023-11-29 00:18:49,477 INFO L349 Elim1Store]: treesize reduction 21, result has 30.0 percent of original size [2023-11-29 00:18:49,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 25 [2023-11-29 00:18:49,995 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 312 proven. 42 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2023-11-29 00:18:49,995 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:18:50,470 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 32 |c_ULTIMATE.start_aws_array_list_copy_harness_~#from~0#1.offset|))) (and (forall ((v_ArrVal_998 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#4.base| |c_ULTIMATE.start_aws_array_list_copy_harness_~#to~0#1.base| v_ArrVal_998) |c_ULTIMATE.start_aws_array_list_copy_harness_~#from~0#1.base|) .cse0) 0)) (forall ((v_ArrVal_999 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#4.offset| |c_ULTIMATE.start_aws_array_list_copy_harness_~#to~0#1.base| v_ArrVal_999) |c_ULTIMATE.start_aws_array_list_copy_harness_~#from~0#1.base|) .cse0) 0)))) is different from false [2023-11-29 00:18:50,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:18:50,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432544224] [2023-11-29 00:18:50,473 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:18:50,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201936323] [2023-11-29 00:18:50,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201936323] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:18:50,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:18:50,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-11-29 00:18:50,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915231171] [2023-11-29 00:18:50,474 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 00:18:50,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 00:18:50,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:18:50,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 00:18:50,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=576, Unknown=1, NotChecked=48, Total=702 [2023-11-29 00:18:50,476 INFO L87 Difference]: Start difference. First operand 196 states and 268 transitions. Second operand has 20 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 10 states have call successors, (32), 4 states have call predecessors, (32), 7 states have return successors, (31), 9 states have call predecessors, (31), 10 states have call successors, (31) [2023-11-29 00:18:56,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:18:56,872 INFO L93 Difference]: Finished difference Result 444 states and 605 transitions. [2023-11-29 00:18:56,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 00:18:56,873 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 10 states have call successors, (32), 4 states have call predecessors, (32), 7 states have return successors, (31), 9 states have call predecessors, (31), 10 states have call successors, (31) Word has length 207 [2023-11-29 00:18:56,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:18:56,875 INFO L225 Difference]: With dead ends: 444 [2023-11-29 00:18:56,876 INFO L226 Difference]: Without dead ends: 273 [2023-11-29 00:18:56,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 308 SyntacticMatches, 8 SemanticMatches, 42 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=237, Invalid=1572, Unknown=1, NotChecked=82, Total=1892 [2023-11-29 00:18:56,878 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 205 mSDsluCounter, 992 mSDsCounter, 0 mSdLazyCounter, 3190 mSolverCounterSat, 100 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 1113 SdHoareTripleChecker+Invalid, 3292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 3190 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2023-11-29 00:18:56,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 1113 Invalid, 3292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 3190 Invalid, 2 Unknown, 0 Unchecked, 5.8s Time] [2023-11-29 00:18:56,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2023-11-29 00:18:56,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 256. [2023-11-29 00:18:56,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 143 states have (on average 1.1818181818181819) internal successors, (169), 146 states have internal predecessors, (169), 84 states have call successors, (84), 26 states have call predecessors, (84), 28 states have return successors, (100), 83 states have call predecessors, (100), 82 states have call successors, (100) [2023-11-29 00:18:56,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 353 transitions. [2023-11-29 00:18:56,901 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 353 transitions. Word has length 207 [2023-11-29 00:18:56,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:18:56,901 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 353 transitions. [2023-11-29 00:18:56,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 10 states have call successors, (32), 4 states have call predecessors, (32), 7 states have return successors, (31), 9 states have call predecessors, (31), 10 states have call successors, (31) [2023-11-29 00:18:56,902 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 353 transitions. [2023-11-29 00:18:56,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2023-11-29 00:18:56,903 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:18:56,903 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:18:56,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 00:18:57,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:18:57,104 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:18:57,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:18:57,104 INFO L85 PathProgramCache]: Analyzing trace with hash -446517767, now seen corresponding path program 1 times [2023-11-29 00:18:57,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:18:57,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423659176] [2023-11-29 00:18:57,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:18:57,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:18:57,182 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:18:57,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1209431311] [2023-11-29 00:18:57,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:18:57,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:18:57,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:18:57,183 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:18:57,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 00:18:57,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:18:57,819 INFO L262 TraceCheckSpWp]: Trace formula consists of 3036 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 00:18:57,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:18:57,841 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 156 proven. 0 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2023-11-29 00:18:57,842 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:18:57,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:18:57,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423659176] [2023-11-29 00:18:57,842 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:18:57,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209431311] [2023-11-29 00:18:57,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209431311] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:18:57,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:18:57,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:18:57,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670652670] [2023-11-29 00:18:57,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:18:57,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:18:57,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:18:57,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:18:57,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:18:57,845 INFO L87 Difference]: Start difference. First operand 256 states and 353 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-11-29 00:18:58,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:18:58,515 INFO L93 Difference]: Finished difference Result 494 states and 696 transitions. [2023-11-29 00:18:58,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:18:58,515 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 207 [2023-11-29 00:18:58,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:18:58,518 INFO L225 Difference]: With dead ends: 494 [2023-11-29 00:18:58,518 INFO L226 Difference]: Without dead ends: 264 [2023-11-29 00:18:58,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:18:58,520 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 7 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:18:58,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 730 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 00:18:58,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2023-11-29 00:18:58,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 258. [2023-11-29 00:18:58,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 145 states have (on average 1.1724137931034482) internal successors, (170), 148 states have internal predecessors, (170), 84 states have call successors, (84), 26 states have call predecessors, (84), 28 states have return successors, (100), 83 states have call predecessors, (100), 82 states have call successors, (100) [2023-11-29 00:18:58,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 354 transitions. [2023-11-29 00:18:58,538 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 354 transitions. Word has length 207 [2023-11-29 00:18:58,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:18:58,538 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 354 transitions. [2023-11-29 00:18:58,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-11-29 00:18:58,538 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 354 transitions. [2023-11-29 00:18:58,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2023-11-29 00:18:58,540 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:18:58,540 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:18:58,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-29 00:18:58,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:18:58,741 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:18:58,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:18:58,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1443114109, now seen corresponding path program 1 times [2023-11-29 00:18:58,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:18:58,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751955925] [2023-11-29 00:18:58,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:18:58,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:18:58,817 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:18:58,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1749522213] [2023-11-29 00:18:58,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:18:58,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:18:58,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:18:58,818 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:18:58,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 00:18:59,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:18:59,479 INFO L262 TraceCheckSpWp]: Trace formula consists of 3046 conjuncts, 68 conjunts are in the unsatisfiable core [2023-11-29 00:18:59,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:18:59,753 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-29 00:18:59,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-29 00:19:00,477 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 171 proven. 0 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2023-11-29 00:19:00,478 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:19:00,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:19:00,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751955925] [2023-11-29 00:19:00,478 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:19:00,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749522213] [2023-11-29 00:19:00,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749522213] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:19:00,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:19:00,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-11-29 00:19:00,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984678507] [2023-11-29 00:19:00,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:19:00,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 00:19:00,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:19:00,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 00:19:00,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-11-29 00:19:00,481 INFO L87 Difference]: Start difference. First operand 258 states and 354 transitions. Second operand has 19 states, 17 states have (on average 4.117647058823529) internal successors, (70), 18 states have internal predecessors, (70), 7 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (29), 6 states have call predecessors, (29), 7 states have call successors, (29) [2023-11-29 00:19:03,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:19:03,941 INFO L93 Difference]: Finished difference Result 761 states and 1020 transitions. [2023-11-29 00:19:03,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 00:19:03,942 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 4.117647058823529) internal successors, (70), 18 states have internal predecessors, (70), 7 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (29), 6 states have call predecessors, (29), 7 states have call successors, (29) Word has length 209 [2023-11-29 00:19:03,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:19:03,945 INFO L225 Difference]: With dead ends: 761 [2023-11-29 00:19:03,946 INFO L226 Difference]: Without dead ends: 524 [2023-11-29 00:19:03,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 190 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=189, Invalid=1071, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 00:19:03,948 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 327 mSDsluCounter, 1067 mSDsCounter, 0 mSdLazyCounter, 1167 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 1251 SdHoareTripleChecker+Invalid, 1267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-11-29 00:19:03,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [389 Valid, 1251 Invalid, 1267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1167 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-11-29 00:19:03,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2023-11-29 00:19:03,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 459. [2023-11-29 00:19:03,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 260 states have (on average 1.1730769230769231) internal successors, (305), 268 states have internal predecessors, (305), 144 states have call successors, (144), 50 states have call predecessors, (144), 54 states have return successors, (172), 140 states have call predecessors, (172), 141 states have call successors, (172) [2023-11-29 00:19:04,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 621 transitions. [2023-11-29 00:19:04,002 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 621 transitions. Word has length 209 [2023-11-29 00:19:04,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:19:04,003 INFO L495 AbstractCegarLoop]: Abstraction has 459 states and 621 transitions. [2023-11-29 00:19:04,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 4.117647058823529) internal successors, (70), 18 states have internal predecessors, (70), 7 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (29), 6 states have call predecessors, (29), 7 states have call successors, (29) [2023-11-29 00:19:04,003 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 621 transitions. [2023-11-29 00:19:04,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2023-11-29 00:19:04,005 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:19:04,006 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:19:04,017 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 00:19:04,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 00:19:04,206 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:19:04,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:19:04,207 INFO L85 PathProgramCache]: Analyzing trace with hash 113031931, now seen corresponding path program 1 times [2023-11-29 00:19:04,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:19:04,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736969887] [2023-11-29 00:19:04,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:19:04,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:19:04,289 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:19:04,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [748264753] [2023-11-29 00:19:04,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:19:04,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:19:04,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:19:04,290 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:19:04,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 00:19:04,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:19:04,860 INFO L262 TraceCheckSpWp]: Trace formula consists of 3114 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 00:19:04,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:19:04,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-29 00:19:04,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2023-11-29 00:19:05,205 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 285 proven. 0 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2023-11-29 00:19:05,205 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:19:05,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:19:05,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736969887] [2023-11-29 00:19:05,205 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:19:05,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748264753] [2023-11-29 00:19:05,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748264753] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:19:05,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:19:05,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-11-29 00:19:05,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363710404] [2023-11-29 00:19:05,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:19:05,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 00:19:05,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:19:05,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 00:19:05,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2023-11-29 00:19:05,208 INFO L87 Difference]: Start difference. First operand 459 states and 621 transitions. Second operand has 15 states, 13 states have (on average 6.384615384615385) internal successors, (83), 13 states have internal predecessors, (83), 8 states have call successors, (33), 4 states have call predecessors, (33), 7 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2023-11-29 00:19:10,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:19:15,366 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:19:19,667 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:19:23,679 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:19:27,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:19:31,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:19:35,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:19:39,776 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:19:43,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:19:47,864 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:19:51,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:19:56,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:20:00,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:20:04,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:20:08,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:20:12,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:20:16,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:20:20,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:20:24,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:20:28,622 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.69s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:20:32,630 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:20:37,073 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:20:41,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:20:45,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:20:49,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:20:53,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:20:57,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:20:57,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:20:57,714 INFO L93 Difference]: Finished difference Result 832 states and 1086 transitions. [2023-11-29 00:20:57,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 00:20:57,715 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 6.384615384615385) internal successors, (83), 13 states have internal predecessors, (83), 8 states have call successors, (33), 4 states have call predecessors, (33), 7 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) Word has length 219 [2023-11-29 00:20:57,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:20:57,718 INFO L225 Difference]: With dead ends: 832 [2023-11-29 00:20:57,719 INFO L226 Difference]: Without dead ends: 625 [2023-11-29 00:20:57,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 208 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2023-11-29 00:20:57,720 INFO L413 NwaCegarLoop]: 399 mSDtfsCounter, 286 mSDsluCounter, 2578 mSDsCounter, 0 mSdLazyCounter, 1567 mSolverCounterSat, 59 mSolverCounterUnsat, 27 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 112.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 2977 SdHoareTripleChecker+Invalid, 1653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1567 IncrementalHoareTripleChecker+Invalid, 27 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 112.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:20:57,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 2977 Invalid, 1653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1567 Invalid, 27 Unknown, 0 Unchecked, 112.3s Time] [2023-11-29 00:20:57,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2023-11-29 00:20:57,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 565. [2023-11-29 00:20:57,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 331 states have (on average 1.1752265861027191) internal successors, (389), 342 states have internal predecessors, (389), 159 states have call successors, (159), 68 states have call predecessors, (159), 74 states have return successors, (184), 154 states have call predecessors, (184), 154 states have call successors, (184) [2023-11-29 00:20:57,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 732 transitions. [2023-11-29 00:20:57,787 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 732 transitions. Word has length 219 [2023-11-29 00:20:57,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:20:57,787 INFO L495 AbstractCegarLoop]: Abstraction has 565 states and 732 transitions. [2023-11-29 00:20:57,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 6.384615384615385) internal successors, (83), 13 states have internal predecessors, (83), 8 states have call successors, (33), 4 states have call predecessors, (33), 7 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2023-11-29 00:20:57,788 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 732 transitions. [2023-11-29 00:20:57,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2023-11-29 00:20:57,790 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:20:57,790 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:20:57,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 00:20:57,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:20:57,991 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:20:57,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:20:57,992 INFO L85 PathProgramCache]: Analyzing trace with hash 2091706879, now seen corresponding path program 1 times [2023-11-29 00:20:57,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:20:57,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462652605] [2023-11-29 00:20:57,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:20:57,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:20:58,082 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:20:58,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [213531615] [2023-11-29 00:20:58,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:20:58,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:20:58,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:20:58,085 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:20:58,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 00:20:58,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:20:58,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 3041 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 00:20:58,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:20:58,776 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 156 proven. 0 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2023-11-29 00:20:58,776 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:20:58,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:20:58,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462652605] [2023-11-29 00:20:58,776 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:20:58,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213531615] [2023-11-29 00:20:58,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213531615] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:20:58,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:20:58,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:20:58,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482682948] [2023-11-29 00:20:58,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:20:58,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:20:58,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:20:58,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:20:58,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:20:58,779 INFO L87 Difference]: Start difference. First operand 565 states and 732 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-11-29 00:21:00,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:21:00,327 INFO L93 Difference]: Finished difference Result 1069 states and 1438 transitions. [2023-11-29 00:21:00,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:21:00,328 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 209 [2023-11-29 00:21:00,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:21:00,331 INFO L225 Difference]: With dead ends: 1069 [2023-11-29 00:21:00,331 INFO L226 Difference]: Without dead ends: 597 [2023-11-29 00:21:00,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:21:00,333 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 10 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 926 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:21:00,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 926 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-29 00:21:00,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2023-11-29 00:21:00,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 573. [2023-11-29 00:21:00,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 339 states have (on average 1.168141592920354) internal successors, (396), 350 states have internal predecessors, (396), 159 states have call successors, (159), 68 states have call predecessors, (159), 74 states have return successors, (184), 154 states have call predecessors, (184), 154 states have call successors, (184) [2023-11-29 00:21:00,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 739 transitions. [2023-11-29 00:21:00,380 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 739 transitions. Word has length 209 [2023-11-29 00:21:00,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:21:00,380 INFO L495 AbstractCegarLoop]: Abstraction has 573 states and 739 transitions. [2023-11-29 00:21:00,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-11-29 00:21:00,381 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 739 transitions. [2023-11-29 00:21:00,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2023-11-29 00:21:00,382 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:21:00,382 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:21:00,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 00:21:00,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:00,583 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:21:00,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:21:00,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1401875389, now seen corresponding path program 1 times [2023-11-29 00:21:00,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:21:00,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20419282] [2023-11-29 00:21:00,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:00,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:21:00,656 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:21:00,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1105243602] [2023-11-29 00:21:00,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:00,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:00,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:21:00,658 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:21:00,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 00:21:01,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:21:01,328 INFO L262 TraceCheckSpWp]: Trace formula consists of 3046 conjuncts, 77 conjunts are in the unsatisfiable core [2023-11-29 00:21:01,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:21:01,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-29 00:21:01,532 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-29 00:21:02,057 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 202 proven. 0 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2023-11-29 00:21:02,058 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:21:02,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:21:02,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20419282] [2023-11-29 00:21:02,058 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:21:02,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105243602] [2023-11-29 00:21:02,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105243602] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:21:02,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:21:02,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-11-29 00:21:02,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758192508] [2023-11-29 00:21:02,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:21:02,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 00:21:02,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:21:02,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 00:21:02,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2023-11-29 00:21:02,061 INFO L87 Difference]: Start difference. First operand 573 states and 739 transitions. Second operand has 17 states, 14 states have (on average 5.0) internal successors, (70), 15 states have internal predecessors, (70), 8 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (29), 7 states have call predecessors, (29), 8 states have call successors, (29) [2023-11-29 00:21:05,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:21:05,916 INFO L93 Difference]: Finished difference Result 1111 states and 1434 transitions. [2023-11-29 00:21:05,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 00:21:05,917 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 5.0) internal successors, (70), 15 states have internal predecessors, (70), 8 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (29), 7 states have call predecessors, (29), 8 states have call successors, (29) Word has length 209 [2023-11-29 00:21:05,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:21:05,921 INFO L225 Difference]: With dead ends: 1111 [2023-11-29 00:21:05,921 INFO L226 Difference]: Without dead ends: 629 [2023-11-29 00:21:05,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2023-11-29 00:21:05,924 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 277 mSDsluCounter, 1632 mSDsCounter, 0 mSdLazyCounter, 1542 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 1853 SdHoareTripleChecker+Invalid, 1623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:21:05,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 1853 Invalid, 1623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1542 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-11-29 00:21:05,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2023-11-29 00:21:05,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 566. [2023-11-29 00:21:05,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 333 states have (on average 1.1681681681681682) internal successors, (389), 343 states have internal predecessors, (389), 159 states have call successors, (159), 68 states have call predecessors, (159), 73 states have return successors, (183), 154 states have call predecessors, (183), 154 states have call successors, (183) [2023-11-29 00:21:05,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 731 transitions. [2023-11-29 00:21:05,994 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 731 transitions. Word has length 209 [2023-11-29 00:21:05,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:21:05,994 INFO L495 AbstractCegarLoop]: Abstraction has 566 states and 731 transitions. [2023-11-29 00:21:05,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 5.0) internal successors, (70), 15 states have internal predecessors, (70), 8 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (29), 7 states have call predecessors, (29), 8 states have call successors, (29) [2023-11-29 00:21:05,994 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 731 transitions. [2023-11-29 00:21:05,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2023-11-29 00:21:05,997 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:21:05,997 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:21:06,008 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 00:21:06,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:06,198 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:21:06,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:21:06,198 INFO L85 PathProgramCache]: Analyzing trace with hash 145812661, now seen corresponding path program 1 times [2023-11-29 00:21:06,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:21:06,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325449500] [2023-11-29 00:21:06,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:06,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:21:06,261 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:21:06,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1050317870] [2023-11-29 00:21:06,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:06,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:06,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:21:06,263 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:21:06,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 00:21:06,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:21:06,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 3080 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-29 00:21:06,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:21:07,925 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 334 proven. 12 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2023-11-29 00:21:07,926 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:21:08,387 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-11-29 00:21:08,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2023-11-29 00:21:08,395 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-29 00:21:08,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2023-11-29 00:21:08,459 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 27 proven. 36 refuted. 0 times theorem prover too weak. 413 trivial. 0 not checked. [2023-11-29 00:21:08,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:21:08,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325449500] [2023-11-29 00:21:08,460 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:21:08,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050317870] [2023-11-29 00:21:08,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050317870] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:21:08,460 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:21:08,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2023-11-29 00:21:08,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242865215] [2023-11-29 00:21:08,460 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:21:08,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 00:21:08,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:21:08,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 00:21:08,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2023-11-29 00:21:08,463 INFO L87 Difference]: Start difference. First operand 566 states and 731 transitions. Second operand has 22 states, 22 states have (on average 5.545454545454546) internal successors, (122), 22 states have internal predecessors, (122), 11 states have call successors, (57), 3 states have call predecessors, (57), 6 states have return successors, (56), 11 states have call predecessors, (56), 11 states have call successors, (56) [2023-11-29 00:21:13,643 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:21:18,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:21:22,942 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:21:26,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:21:30,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:21:35,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:21:39,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:21:43,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:21:47,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:21:51,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:21:55,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:21:59,381 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:22:03,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:22:07,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:22:11,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:22:17,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:22:21,269 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:22:25,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:22:29,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:22:33,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:22:37,964 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:22:41,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:22:45,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:22:46,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:46,284 INFO L93 Difference]: Finished difference Result 1566 states and 2100 transitions. [2023-11-29 00:22:46,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-29 00:22:46,285 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.545454545454546) internal successors, (122), 22 states have internal predecessors, (122), 11 states have call successors, (57), 3 states have call predecessors, (57), 6 states have return successors, (56), 11 states have call predecessors, (56), 11 states have call successors, (56) Word has length 214 [2023-11-29 00:22:46,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:46,291 INFO L225 Difference]: With dead ends: 1566 [2023-11-29 00:22:46,291 INFO L226 Difference]: Without dead ends: 1166 [2023-11-29 00:22:46,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 399 SyntacticMatches, 14 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=340, Invalid=1466, Unknown=0, NotChecked=0, Total=1806 [2023-11-29 00:22:46,293 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 347 mSDsluCounter, 1858 mSDsCounter, 0 mSdLazyCounter, 2145 mSolverCounterSat, 199 mSolverCounterUnsat, 23 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 96.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 2084 SdHoareTripleChecker+Invalid, 2367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 2145 IncrementalHoareTripleChecker+Invalid, 23 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 97.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:46,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [417 Valid, 2084 Invalid, 2367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 2145 Invalid, 23 Unknown, 0 Unchecked, 97.1s Time] [2023-11-29 00:22:46,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1166 states. [2023-11-29 00:22:46,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1166 to 890. [2023-11-29 00:22:46,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 539 states have (on average 1.1706864564007422) internal successors, (631), 556 states have internal predecessors, (631), 248 states have call successors, (248), 93 states have call predecessors, (248), 102 states have return successors, (324), 240 states have call predecessors, (324), 241 states have call successors, (324) [2023-11-29 00:22:46,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1203 transitions. [2023-11-29 00:22:46,405 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1203 transitions. Word has length 214 [2023-11-29 00:22:46,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:46,405 INFO L495 AbstractCegarLoop]: Abstraction has 890 states and 1203 transitions. [2023-11-29 00:22:46,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.545454545454546) internal successors, (122), 22 states have internal predecessors, (122), 11 states have call successors, (57), 3 states have call predecessors, (57), 6 states have return successors, (56), 11 states have call predecessors, (56), 11 states have call successors, (56) [2023-11-29 00:22:46,406 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1203 transitions. [2023-11-29 00:22:46,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2023-11-29 00:22:46,409 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:46,409 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:46,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-29 00:22:46,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 00:22:46,610 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:22:46,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:46,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1108198773, now seen corresponding path program 1 times [2023-11-29 00:22:46,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:46,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192472318] [2023-11-29 00:22:46,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:46,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:46,697 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:22:46,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [858817952] [2023-11-29 00:22:46,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:46,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:46,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:46,699 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:46,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 00:22:47,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:47,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 3080 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-29 00:22:47,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:48,301 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 331 proven. 15 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2023-11-29 00:22:48,302 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:22:48,694 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-11-29 00:22:48,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2023-11-29 00:22:48,765 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 27 proven. 36 refuted. 0 times theorem prover too weak. 413 trivial. 0 not checked. [2023-11-29 00:22:48,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:48,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192472318] [2023-11-29 00:22:48,765 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:22:48,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858817952] [2023-11-29 00:22:48,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858817952] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:22:48,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:22:48,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2023-11-29 00:22:48,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76175160] [2023-11-29 00:22:48,766 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:22:48,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 00:22:48,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:48,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 00:22:48,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2023-11-29 00:22:48,768 INFO L87 Difference]: Start difference. First operand 890 states and 1203 transitions. Second operand has 18 states, 18 states have (on average 6.722222222222222) internal successors, (121), 18 states have internal predecessors, (121), 11 states have call successors, (57), 3 states have call predecessors, (57), 6 states have return successors, (56), 11 states have call predecessors, (56), 11 states have call successors, (56) [2023-11-29 00:22:55,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:22:59,545 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:23:03,628 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:23:07,714 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:23:11,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:23:15,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:23:19,914 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:23:23,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:23:28,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:23:32,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:23:36,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:23:40,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:23:44,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:23:48,415 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:23:52,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:23:56,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:24:01,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:24:05,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:24:09,605 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:24:13,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:24:17,767 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:24:21,883 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:24:26,687 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:24:31,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:24:35,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:24:39,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:24:40,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:24:40,230 INFO L93 Difference]: Finished difference Result 2146 states and 2976 transitions. [2023-11-29 00:24:40,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 00:24:40,230 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.722222222222222) internal successors, (121), 18 states have internal predecessors, (121), 11 states have call successors, (57), 3 states have call predecessors, (57), 6 states have return successors, (56), 11 states have call predecessors, (56), 11 states have call successors, (56) Word has length 214 [2023-11-29 00:24:40,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:24:40,237 INFO L225 Difference]: With dead ends: 2146 [2023-11-29 00:24:40,237 INFO L226 Difference]: Without dead ends: 1344 [2023-11-29 00:24:40,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 400 SyntacticMatches, 14 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=210, Invalid=912, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 00:24:40,240 INFO L413 NwaCegarLoop]: 350 mSDtfsCounter, 292 mSDsluCounter, 2501 mSDsCounter, 0 mSdLazyCounter, 2470 mSolverCounterSat, 142 mSolverCounterUnsat, 26 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 109.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 2851 SdHoareTripleChecker+Invalid, 2638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 2470 IncrementalHoareTripleChecker+Invalid, 26 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 110.9s IncrementalHoareTripleChecker+Time [2023-11-29 00:24:40,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 2851 Invalid, 2638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 2470 Invalid, 26 Unknown, 0 Unchecked, 110.9s Time] [2023-11-29 00:24:40,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2023-11-29 00:24:40,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 1095. [2023-11-29 00:24:40,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1095 states, 673 states have (on average 1.1456166419019316) internal successors, (771), 695 states have internal predecessors, (771), 295 states have call successors, (295), 113 states have call predecessors, (295), 126 states have return successors, (387), 286 states have call predecessors, (387), 285 states have call successors, (387) [2023-11-29 00:24:40,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1095 states to 1095 states and 1453 transitions. [2023-11-29 00:24:40,351 INFO L78 Accepts]: Start accepts. Automaton has 1095 states and 1453 transitions. Word has length 214 [2023-11-29 00:24:40,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:24:40,352 INFO L495 AbstractCegarLoop]: Abstraction has 1095 states and 1453 transitions. [2023-11-29 00:24:40,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.722222222222222) internal successors, (121), 18 states have internal predecessors, (121), 11 states have call successors, (57), 3 states have call predecessors, (57), 6 states have return successors, (56), 11 states have call predecessors, (56), 11 states have call successors, (56) [2023-11-29 00:24:40,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1095 states and 1453 transitions. [2023-11-29 00:24:40,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2023-11-29 00:24:40,355 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:24:40,355 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:24:40,364 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 00:24:40,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:24:40,556 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:24:40,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:24:40,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1577190345, now seen corresponding path program 2 times [2023-11-29 00:24:40,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:24:40,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013977309] [2023-11-29 00:24:40,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:24:40,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:24:40,642 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:24:40,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2027746556] [2023-11-29 00:24:40,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:24:40,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:24:40,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:24:40,644 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:24:40,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 00:24:42,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:24:42,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:24:42,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 3080 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-29 00:24:42,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:24:42,684 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 316 proven. 6 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2023-11-29 00:24:42,684 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:24:43,330 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 39 proven. 30 refuted. 0 times theorem prover too weak. 407 trivial. 0 not checked. [2023-11-29 00:24:43,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:24:43,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013977309] [2023-11-29 00:24:43,331 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:24:43,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027746556] [2023-11-29 00:24:43,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027746556] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:24:43,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:24:43,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2023-11-29 00:24:43,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311477134] [2023-11-29 00:24:43,332 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:24:43,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 00:24:43,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:24:43,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 00:24:43,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2023-11-29 00:24:43,334 INFO L87 Difference]: Start difference. First operand 1095 states and 1453 transitions. Second operand has 24 states, 22 states have (on average 5.045454545454546) internal successors, (111), 21 states have internal predecessors, (111), 10 states have call successors, (56), 4 states have call predecessors, (56), 7 states have return successors, (54), 10 states have call predecessors, (54), 10 states have call successors, (54) [2023-11-29 00:24:48,305 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:24:54,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:24:58,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:25:02,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:25:06,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:25:10,277 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:25:14,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:25:19,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:25:24,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:25:24,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:25:24,744 INFO L93 Difference]: Finished difference Result 2047 states and 2709 transitions. [2023-11-29 00:25:24,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 00:25:24,745 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 5.045454545454546) internal successors, (111), 21 states have internal predecessors, (111), 10 states have call successors, (56), 4 states have call predecessors, (56), 7 states have return successors, (54), 10 states have call predecessors, (54), 10 states have call successors, (54) Word has length 214 [2023-11-29 00:25:24,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:25:24,750 INFO L225 Difference]: With dead ends: 2047 [2023-11-29 00:25:24,750 INFO L226 Difference]: Without dead ends: 1147 [2023-11-29 00:25:24,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 404 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=198, Invalid=1208, Unknown=0, NotChecked=0, Total=1406 [2023-11-29 00:25:24,753 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 306 mSDsluCounter, 1686 mSDsCounter, 0 mSdLazyCounter, 1851 mSolverCounterSat, 145 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 1888 SdHoareTripleChecker+Invalid, 2005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1851 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.8s IncrementalHoareTripleChecker+Time [2023-11-29 00:25:24,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 1888 Invalid, 2005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1851 Invalid, 9 Unknown, 0 Unchecked, 40.8s Time] [2023-11-29 00:25:24,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2023-11-29 00:25:24,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1130. [2023-11-29 00:25:24,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1130 states, 699 states have (on average 1.1416309012875536) internal successors, (798), 721 states have internal predecessors, (798), 297 states have call successors, (297), 120 states have call predecessors, (297), 133 states have return successors, (371), 288 states have call predecessors, (371), 287 states have call successors, (371) [2023-11-29 00:25:24,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1130 states to 1130 states and 1466 transitions. [2023-11-29 00:25:24,887 INFO L78 Accepts]: Start accepts. Automaton has 1130 states and 1466 transitions. Word has length 214 [2023-11-29 00:25:24,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:25:24,888 INFO L495 AbstractCegarLoop]: Abstraction has 1130 states and 1466 transitions. [2023-11-29 00:25:24,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 5.045454545454546) internal successors, (111), 21 states have internal predecessors, (111), 10 states have call successors, (56), 4 states have call predecessors, (56), 7 states have return successors, (54), 10 states have call predecessors, (54), 10 states have call successors, (54) [2023-11-29 00:25:24,888 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states and 1466 transitions. [2023-11-29 00:25:24,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2023-11-29 00:25:24,892 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:25:24,892 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:25:24,904 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 00:25:25,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:25:25,093 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:25:25,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:25:25,093 INFO L85 PathProgramCache]: Analyzing trace with hash 124146347, now seen corresponding path program 3 times [2023-11-29 00:25:25,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:25:25,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403523680] [2023-11-29 00:25:25,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:25,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:25:25,177 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:25:25,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1828517096] [2023-11-29 00:25:25,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:25:25,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:25:25,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:25:25,179 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:25:25,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 00:25:32,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 00:25:32,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:25:32,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 2774 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-29 00:25:32,269 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:25:32,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2023-11-29 00:25:32,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-11-29 00:25:48,896 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-29 00:25:48,896 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:25:48,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:25:48,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403523680] [2023-11-29 00:25:48,896 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:25:48,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828517096] [2023-11-29 00:25:48,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828517096] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:25:48,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:25:48,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-29 00:25:48,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545882997] [2023-11-29 00:25:48,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:25:48,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 00:25:48,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:25:48,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 00:25:48,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=117, Unknown=4, NotChecked=0, Total=156 [2023-11-29 00:25:48,899 INFO L87 Difference]: Start difference. First operand 1130 states and 1466 transitions. Second operand has 13 states, 11 states have (on average 6.909090909090909) internal successors, (76), 12 states have internal predecessors, (76), 7 states have call successors, (31), 4 states have call predecessors, (31), 6 states have return successors, (30), 7 states have call predecessors, (30), 7 states have call successors, (30) [2023-11-29 00:25:54,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:25:58,734 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:26:03,612 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:26:07,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:26:11,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:26:15,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:26:19,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:26:45,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:26:49,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:26:53,415 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:26:57,430 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:27:01,614 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:27:05,753 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:27:09,776 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:27:13,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:27:18,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:27:22,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:27:26,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:27:30,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:27:34,266 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:27:38,313 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:27:42,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:27:46,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:27:50,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:27:54,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:27:58,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:28:02,607 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:28:06,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:28:11,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:28:15,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:28:19,280 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:28:23,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:28:27,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:28:33,862 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:28:37,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:28:42,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:28:46,642 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:28:50,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:28:54,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:28:58,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:29:03,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:29:07,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:29:11,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:29:16,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:29:20,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:29:24,531 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:29:28,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:29:32,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:29:36,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:29:41,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:29:41,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:29:41,566 INFO L93 Difference]: Finished difference Result 2687 states and 3490 transitions. [2023-11-29 00:29:41,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 00:29:41,567 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 6.909090909090909) internal successors, (76), 12 states have internal predecessors, (76), 7 states have call successors, (31), 4 states have call predecessors, (31), 6 states have return successors, (30), 7 states have call predecessors, (30), 7 states have call successors, (30) Word has length 218 [2023-11-29 00:29:41,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:29:41,576 INFO L225 Difference]: With dead ends: 2687 [2023-11-29 00:29:41,576 INFO L226 Difference]: Without dead ends: 1645 [2023-11-29 00:29:41,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 204 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 39.7s TimeCoverageRelationStatistics Valid=110, Invalid=387, Unknown=9, NotChecked=0, Total=506 [2023-11-29 00:29:41,580 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 254 mSDsluCounter, 2055 mSDsCounter, 0 mSdLazyCounter, 1360 mSolverCounterSat, 87 mSolverCounterUnsat, 50 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 206.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 2410 SdHoareTripleChecker+Invalid, 1497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1360 IncrementalHoareTripleChecker+Invalid, 50 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 209.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:29:41,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 2410 Invalid, 1497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1360 Invalid, 50 Unknown, 0 Unchecked, 209.1s Time] [2023-11-29 00:29:41,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1645 states. [2023-11-29 00:29:41,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1645 to 1224. [2023-11-29 00:29:41,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 754 states have (on average 1.1392572944297081) internal successors, (859), 781 states have internal predecessors, (859), 320 states have call successors, (320), 136 states have call predecessors, (320), 149 states have return successors, (401), 306 states have call predecessors, (401), 310 states have call successors, (401) [2023-11-29 00:29:41,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 1580 transitions. [2023-11-29 00:29:41,781 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 1580 transitions. Word has length 218 [2023-11-29 00:29:41,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:29:41,781 INFO L495 AbstractCegarLoop]: Abstraction has 1224 states and 1580 transitions. [2023-11-29 00:29:41,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 6.909090909090909) internal successors, (76), 12 states have internal predecessors, (76), 7 states have call successors, (31), 4 states have call predecessors, (31), 6 states have return successors, (30), 7 states have call predecessors, (30), 7 states have call successors, (30) [2023-11-29 00:29:41,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 1580 transitions. [2023-11-29 00:29:41,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2023-11-29 00:29:41,785 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:29:41,786 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:29:41,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 00:29:41,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:29:41,986 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:29:41,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:29:41,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1224773141, now seen corresponding path program 1 times [2023-11-29 00:29:41,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:29:41,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548458467] [2023-11-29 00:29:41,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:29:41,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:29:42,068 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:29:42,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [32460677] [2023-11-29 00:29:42,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:29:42,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:29:42,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:29:42,069 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:29:42,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01d1c89e-c2fd-496c-b788-73b649f8e60e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 00:29:42,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:29:42,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 3090 conjuncts, 114 conjunts are in the unsatisfiable core [2023-11-29 00:29:42,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:29:43,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-29 00:29:43,106 INFO L349 Elim1Store]: treesize reduction 39, result has 32.8 percent of original size [2023-11-29 00:29:43,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 41 [2023-11-29 00:30:03,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2023-11-29 00:30:03,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-11-29 00:30:52,999 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-29 00:30:52,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 00:30:53,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 14 [2023-11-29 00:32:32,402 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 279 proven. 119 refuted. 8 times theorem prover too weak. 76 trivial. 0 not checked. [2023-11-29 00:32:32,402 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:32:49,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:32:49,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548458467] [2023-11-29 00:32:49,852 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:32:49,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32460677] [2023-11-29 00:32:49,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32460677] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:32:49,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:32:49,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2023-11-29 00:32:49,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925399774] [2023-11-29 00:32:49,853 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 00:32:49,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-29 00:32:49,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:32:49,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-29 00:32:49,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1709, Unknown=25, NotChecked=0, Total=1892 [2023-11-29 00:32:49,856 INFO L87 Difference]: Start difference. First operand 1224 states and 1580 transitions. Second operand has 32 states, 28 states have (on average 3.9285714285714284) internal successors, (110), 28 states have internal predecessors, (110), 15 states have call successors, (34), 7 states have call predecessors, (34), 13 states have return successors, (33), 14 states have call predecessors, (33), 15 states have call successors, (33) [2023-11-29 00:32:54,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:32:59,550 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:33:05,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:33:11,864 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]