./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_array_eq_c_str_harness.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_8fb213fe-d5a3-4f5c-81dd-5c4054f06c0c/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb213fe-d5a3-4f5c-81dd-5c4054f06c0c/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb213fe-d5a3-4f5c-81dd-5c4054f06c0c/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb213fe-d5a3-4f5c-81dd-5c4054f06c0c/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_array_eq_c_str_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb213fe-d5a3-4f5c-81dd-5c4054f06c0c/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb213fe-d5a3-4f5c-81dd-5c4054f06c0c/bin/uautomizer-verify-VRDe98Ueme --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 99ee682e10e695b9eb1615836043680c46e24c4df6227faaade6163d2feea99e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 12:03:04,154 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 12:03:04,282 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb213fe-d5a3-4f5c-81dd-5c4054f06c0c/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-64bit-Automizer_Default.epf [2023-11-26 12:03:04,287 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 12:03:04,288 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 12:03:04,312 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 12:03:04,313 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 12:03:04,313 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 12:03:04,314 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 12:03:04,315 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 12:03:04,316 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 12:03:04,316 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 12:03:04,317 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 12:03:04,318 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 12:03:04,318 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 12:03:04,319 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 12:03:04,319 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 12:03:04,320 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 12:03:04,321 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 12:03:04,321 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 12:03:04,322 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 12:03:04,322 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 12:03:04,323 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 12:03:04,323 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 12:03:04,324 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 12:03:04,324 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 12:03:04,325 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 12:03:04,325 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 12:03:04,326 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:03:04,326 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 12:03:04,327 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 12:03:04,327 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 12:03:04,328 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 12:03:04,328 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 12:03:04,328 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 12:03:04,329 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 12:03:04,329 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 12:03:04,329 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 12:03:04,330 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 12:03:04,330 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_8fb213fe-d5a3-4f5c-81dd-5c4054f06c0c/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb213fe-d5a3-4f5c-81dd-5c4054f06c0c/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 99ee682e10e695b9eb1615836043680c46e24c4df6227faaade6163d2feea99e [2023-11-26 12:03:04,683 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 12:03:04,713 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 12:03:04,715 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 12:03:04,717 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 12:03:04,718 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 12:03:04,720 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb213fe-d5a3-4f5c-81dd-5c4054f06c0c/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/aws-c-common/aws_array_eq_c_str_harness.i [2023-11-26 12:03:07,878 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 12:03:08,492 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 12:03:08,492 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb213fe-d5a3-4f5c-81dd-5c4054f06c0c/sv-benchmarks/c/aws-c-common/aws_array_eq_c_str_harness.i [2023-11-26 12:03:08,535 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb213fe-d5a3-4f5c-81dd-5c4054f06c0c/bin/uautomizer-verify-VRDe98Ueme/data/34186bbf2/d123f6d5bbb94dc49048ad4e875364f1/FLAG75f044a21 [2023-11-26 12:03:08,551 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb213fe-d5a3-4f5c-81dd-5c4054f06c0c/bin/uautomizer-verify-VRDe98Ueme/data/34186bbf2/d123f6d5bbb94dc49048ad4e875364f1 [2023-11-26 12:03:08,558 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 12:03:08,560 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 12:03:08,563 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 12:03:08,563 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 12:03:08,568 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 12:03:08,569 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:03:08" (1/1) ... [2023-11-26 12:03:08,570 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bc079d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:08, skipping insertion in model container [2023-11-26 12:03:08,570 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:03:08" (1/1) ... [2023-11-26 12:03:08,701 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 12:03:09,033 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_8fb213fe-d5a3-4f5c-81dd-5c4054f06c0c/sv-benchmarks/c/aws-c-common/aws_array_eq_c_str_harness.i[4492,4505] [2023-11-26 12:03:09,043 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_8fb213fe-d5a3-4f5c-81dd-5c4054f06c0c/sv-benchmarks/c/aws-c-common/aws_array_eq_c_str_harness.i[4552,4565] [2023-11-26 12:03:10,047 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:10,048 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:10,049 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:10,050 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:10,051 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:10,066 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:10,080 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:10,082 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:10,083 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:10,515 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-26 12:03:10,516 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-26 12:03:10,517 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-26 12:03:10,519 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-26 12:03:10,521 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-26 12:03:10,522 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-26 12:03:10,522 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-26 12:03:10,523 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-26 12:03:10,524 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-26 12:03:10,525 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-26 12:03:10,930 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:10,931 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:11,001 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:03:11,067 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 12:03:11,082 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_8fb213fe-d5a3-4f5c-81dd-5c4054f06c0c/sv-benchmarks/c/aws-c-common/aws_array_eq_c_str_harness.i[4492,4505] [2023-11-26 12:03:11,083 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_8fb213fe-d5a3-4f5c-81dd-5c4054f06c0c/sv-benchmarks/c/aws-c-common/aws_array_eq_c_str_harness.i[4552,4565] [2023-11-26 12:03:11,132 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:11,132 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:11,133 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:11,134 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:11,135 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:11,146 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:11,147 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:11,148 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:11,149 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:11,206 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-26 12:03:11,207 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-26 12:03:11,207 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-26 12:03:11,208 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-26 12:03:11,209 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-26 12:03:11,209 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-26 12:03:11,210 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-26 12:03:11,210 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-26 12:03:11,211 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-26 12:03:11,211 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-26 12:03:11,374 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : "+r"(index)); [8277] [2023-11-26 12:03:11,385 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:11,386 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:11,441 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [8763-8774] [2023-11-26 12:03:11,456 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:03:11,679 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:11,680 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:11,680 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:11,680 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:11,680 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:11,680 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:11,680 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:11,681 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:11,681 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:11,681 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:11,681 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:11,681 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:11,682 WARN L675 CHandler]: The function predicate is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:11,682 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:11,682 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:11,682 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:11,682 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:11,682 WARN L675 CHandler]: The function memchr is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:11,690 INFO L206 MainTranslator]: Completed translation [2023-11-26 12:03:11,691 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:11 WrapperNode [2023-11-26 12:03:11,691 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 12:03:11,692 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 12:03:11,692 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 12:03:11,693 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 12:03:11,699 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:11" (1/1) ... [2023-11-26 12:03:11,832 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:11" (1/1) ... [2023-11-26 12:03:11,952 INFO L138 Inliner]: procedures = 690, calls = 2618, calls flagged for inlining = 60, calls inlined = 6, statements flattened = 803 [2023-11-26 12:03:11,952 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 12:03:11,953 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 12:03:11,954 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 12:03:11,954 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 12:03:11,967 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:11" (1/1) ... [2023-11-26 12:03:11,968 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:11" (1/1) ... [2023-11-26 12:03:12,004 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:11" (1/1) ... [2023-11-26 12:03:12,136 INFO L175 MemorySlicer]: Split 516 memory accesses to 7 slices as follows [2, 5, 256, 236, 8, 6, 3]. 50 percent of accesses are in the largest equivalence class. The 502 initializations are split as follows [2, 5, 256, 236, 0, 0, 3]. The 2 writes are split as follows [0, 0, 0, 0, 0, 2, 0]. [2023-11-26 12:03:12,151 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:11" (1/1) ... [2023-11-26 12:03:12,152 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:11" (1/1) ... [2023-11-26 12:03:12,194 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:11" (1/1) ... [2023-11-26 12:03:12,202 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:11" (1/1) ... [2023-11-26 12:03:12,209 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:11" (1/1) ... [2023-11-26 12:03:12,222 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:11" (1/1) ... [2023-11-26 12:03:12,246 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 12:03:12,257 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 12:03:12,257 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 12:03:12,257 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 12:03:12,258 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:11" (1/1) ... [2023-11-26 12:03:12,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:03:12,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb213fe-d5a3-4f5c-81dd-5c4054f06c0c/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:03:12,305 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb213fe-d5a3-4f5c-81dd-5c4054f06c0c/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 12:03:12,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb213fe-d5a3-4f5c-81dd-5c4054f06c0c/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 12:03:12,347 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_eq_c_str [2023-11-26 12:03:12,348 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_eq_c_str [2023-11-26 12:03:12,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 12:03:12,349 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-26 12:03:12,349 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-26 12:03:12,349 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 12:03:12,349 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 12:03:12,350 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 12:03:12,350 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 12:03:12,350 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-26 12:03:12,351 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-26 12:03:12,351 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2023-11-26 12:03:12,352 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-26 12:03:12,352 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-26 12:03:12,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 12:03:12,353 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 12:03:12,353 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_array [2023-11-26 12:03:12,353 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_array [2023-11-26 12:03:12,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 12:03:12,353 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 12:03:12,355 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-26 12:03:12,355 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-26 12:03:12,356 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2023-11-26 12:03:12,356 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2023-11-26 12:03:12,356 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2023-11-26 12:03:12,357 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2023-11-26 12:03:12,357 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 12:03:12,357 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 12:03:12,358 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 12:03:12,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-11-26 12:03:12,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-11-26 12:03:12,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-11-26 12:03:12,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2023-11-26 12:03:12,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2023-11-26 12:03:12,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#5 [2023-11-26 12:03:12,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#6 [2023-11-26 12:03:12,360 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-11-26 12:03:12,360 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-11-26 12:03:12,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 12:03:12,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 12:03:12,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 12:03:12,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 12:03:12,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-26 12:03:12,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-26 12:03:12,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2023-11-26 12:03:12,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 12:03:12,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 12:03:12,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 12:03:12,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 12:03:12,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-26 12:03:12,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-26 12:03:12,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-11-26 12:03:12,730 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 12:03:12,733 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 12:03:14,000 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 12:03:14,151 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 12:03:14,151 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 12:03:14,152 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:03:14 BoogieIcfgContainer [2023-11-26 12:03:14,152 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 12:03:14,155 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 12:03:14,156 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 12:03:14,159 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 12:03:14,160 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:03:08" (1/3) ... [2023-11-26 12:03:14,161 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ac12e98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:03:14, skipping insertion in model container [2023-11-26 12:03:14,161 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:11" (2/3) ... [2023-11-26 12:03:14,163 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ac12e98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:03:14, skipping insertion in model container [2023-11-26 12:03:14,163 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:03:14" (3/3) ... [2023-11-26 12:03:14,167 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_array_eq_c_str_harness.i [2023-11-26 12:03:14,198 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 12:03:14,199 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 12:03:14,253 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 12:03:14,260 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;@72ee7c36, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 12:03:14,261 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 12:03:14,265 INFO L276 IsEmpty]: Start isEmpty. Operand has 85 states, 48 states have (on average 1.3333333333333333) internal successors, (64), 51 states have internal predecessors, (64), 26 states have call successors, (26), 9 states have call predecessors, (26), 9 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-26 12:03:14,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-26 12:03:14,278 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:03:14,279 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:03:14,279 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:03:14,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:14,285 INFO L85 PathProgramCache]: Analyzing trace with hash -288302132, now seen corresponding path program 1 times [2023-11-26 12:03:14,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:14,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202047247] [2023-11-26 12:03:14,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:14,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:14,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:14,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:03:14,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:15,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-26 12:03:15,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:15,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:03:15,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:15,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-26 12:03:15,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:15,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-26 12:03:15,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:15,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-26 12:03:15,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:15,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-26 12:03:15,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:15,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-26 12:03:15,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:15,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-11-26 12:03:15,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:15,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:03:15,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:15,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-26 12:03:15,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:15,209 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-26 12:03:15,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:15,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202047247] [2023-11-26 12:03:15,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202047247] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:03:15,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:03:15,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 12:03:15,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777996079] [2023-11-26 12:03:15,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:03:15,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 12:03:15,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:15,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 12:03:15,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 12:03:15,271 INFO L87 Difference]: Start difference. First operand has 85 states, 48 states have (on average 1.3333333333333333) internal successors, (64), 51 states have internal predecessors, (64), 26 states have call successors, (26), 9 states have call predecessors, (26), 9 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 2 states have internal predecessors, (24), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-26 12:03:15,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:03:15,689 INFO L93 Difference]: Finished difference Result 172 states and 256 transitions. [2023-11-26 12:03:15,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 12:03:15,691 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 2 states have internal predecessors, (24), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 63 [2023-11-26 12:03:15,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:03:15,701 INFO L225 Difference]: With dead ends: 172 [2023-11-26 12:03:15,701 INFO L226 Difference]: Without dead ends: 87 [2023-11-26 12:03:15,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 12:03:15,708 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 73 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 12:03:15,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 100 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 12:03:15,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-11-26 12:03:15,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2023-11-26 12:03:15,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 49 states have internal predecessors, (59), 26 states have call successors, (26), 9 states have call predecessors, (26), 9 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2023-11-26 12:03:15,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 110 transitions. [2023-11-26 12:03:15,758 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 110 transitions. Word has length 63 [2023-11-26 12:03:15,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:03:15,759 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 110 transitions. [2023-11-26 12:03:15,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 2 states have internal predecessors, (24), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-26 12:03:15,759 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 110 transitions. [2023-11-26 12:03:15,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-26 12:03:15,763 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:03:15,763 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:03:15,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 12:03:15,763 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:03:15,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:15,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1325277948, now seen corresponding path program 1 times [2023-11-26 12:03:15,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:15,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115274087] [2023-11-26 12:03:15,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:15,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:15,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:17,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:03:17,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:17,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-26 12:03:17,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:17,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:03:17,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:17,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-26 12:03:17,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:17,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-26 12:03:17,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:17,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-26 12:03:17,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:17,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-26 12:03:17,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:17,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-26 12:03:17,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:17,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-11-26 12:03:17,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:17,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:03:17,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:17,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-26 12:03:17,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:17,482 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-26 12:03:17,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:17,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115274087] [2023-11-26 12:03:17,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115274087] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:03:17,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24217740] [2023-11-26 12:03:17,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:17,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:17,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb213fe-d5a3-4f5c-81dd-5c4054f06c0c/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:03:17,487 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb213fe-d5a3-4f5c-81dd-5c4054f06c0c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:03:17,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb213fe-d5a3-4f5c-81dd-5c4054f06c0c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 12:03:18,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:18,137 INFO L262 TraceCheckSpWp]: Trace formula consists of 2442 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-26 12:03:18,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:03:18,240 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-26 12:03:18,240 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:03:18,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24217740] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:03:18,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 12:03:18,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 9 [2023-11-26 12:03:18,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018321988] [2023-11-26 12:03:18,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:03:18,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 12:03:18,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:18,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 12:03:18,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-26 12:03:18,245 INFO L87 Difference]: Start difference. First operand 83 states and 110 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-26 12:03:18,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:03:18,478 INFO L93 Difference]: Finished difference Result 134 states and 178 transitions. [2023-11-26 12:03:18,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 12:03:18,478 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 63 [2023-11-26 12:03:18,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:03:18,481 INFO L225 Difference]: With dead ends: 134 [2023-11-26 12:03:18,481 INFO L226 Difference]: Without dead ends: 83 [2023-11-26 12:03:18,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-26 12:03:18,484 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 2 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 12:03:18,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 419 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 12:03:18,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-26 12:03:18,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-11-26 12:03:18,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 49 states have internal predecessors, (58), 26 states have call successors, (26), 9 states have call predecessors, (26), 9 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2023-11-26 12:03:18,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 109 transitions. [2023-11-26 12:03:18,500 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 109 transitions. Word has length 63 [2023-11-26 12:03:18,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:03:18,501 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 109 transitions. [2023-11-26 12:03:18,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-26 12:03:18,501 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 109 transitions. [2023-11-26 12:03:18,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-26 12:03:18,505 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:03:18,506 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 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] [2023-11-26 12:03:18,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb213fe-d5a3-4f5c-81dd-5c4054f06c0c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 12:03:18,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb213fe-d5a3-4f5c-81dd-5c4054f06c0c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:18,717 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:03:18,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:18,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1321452724, now seen corresponding path program 1 times [2023-11-26 12:03:18,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:18,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685046591] [2023-11-26 12:03:18,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:18,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:19,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:22,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:03:22,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:22,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-26 12:03:22,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:22,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:03:22,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:22,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-26 12:03:22,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:22,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-26 12:03:22,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:22,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-26 12:03:22,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:22,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-26 12:03:22,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:22,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:03:22,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:22,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-26 12:03:22,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:22,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-11-26 12:03:22,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:22,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-11-26 12:03:22,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:23,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-26 12:03:23,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:23,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-11-26 12:03:23,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:23,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-11-26 12:03:23,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:23,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:03:23,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:23,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-26 12:03:23,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:23,239 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-11-26 12:03:23,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:23,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685046591] [2023-11-26 12:03:23,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685046591] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:03:23,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597209982] [2023-11-26 12:03:23,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:23,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:23,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb213fe-d5a3-4f5c-81dd-5c4054f06c0c/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:03:23,248 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb213fe-d5a3-4f5c-81dd-5c4054f06c0c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:03:23,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb213fe-d5a3-4f5c-81dd-5c4054f06c0c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 12:03:23,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:23,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 2520 conjuncts, 73 conjunts are in the unsatisfiable core [2023-11-26 12:03:23,898 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:03:25,430 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 6 proven. 74 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-26 12:03:25,430 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:03:27,247 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-11-26 12:03:27,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597209982] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:03:27,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:03:27,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 21] total 57 [2023-11-26 12:03:27,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749338461] [2023-11-26 12:03:27,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:03:27,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-11-26 12:03:27,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:27,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-11-26 12:03:27,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=2973, Unknown=0, NotChecked=0, Total=3192 [2023-11-26 12:03:27,255 INFO L87 Difference]: Start difference. First operand 83 states and 109 transitions. Second operand has 57 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 43 states have internal predecessors, (86), 22 states have call successors, (45), 6 states have call predecessors, (45), 12 states have return successors, (42), 25 states have call predecessors, (42), 21 states have call successors, (42) [2023-11-26 12:03:30,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:03:30,245 INFO L93 Difference]: Finished difference Result 169 states and 231 transitions. [2023-11-26 12:03:30,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-26 12:03:30,246 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 43 states have internal predecessors, (86), 22 states have call successors, (45), 6 states have call predecessors, (45), 12 states have return successors, (42), 25 states have call predecessors, (42), 21 states have call successors, (42) Word has length 88 [2023-11-26 12:03:30,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:03:30,249 INFO L225 Difference]: With dead ends: 169 [2023-11-26 12:03:30,249 INFO L226 Difference]: Without dead ends: 126 [2023-11-26 12:03:30,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 165 SyntacticMatches, 9 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1650 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=438, Invalid=5262, Unknown=0, NotChecked=0, Total=5700 [2023-11-26 12:03:30,254 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 296 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 2177 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 2407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 2177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:03:30,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 660 Invalid, 2407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 2177 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-26 12:03:30,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-11-26 12:03:30,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 107. [2023-11-26 12:03:30,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 60 states have (on average 1.2) internal successors, (72), 64 states have internal predecessors, (72), 34 states have call successors, (34), 10 states have call predecessors, (34), 12 states have return successors, (37), 33 states have call predecessors, (37), 33 states have call successors, (37) [2023-11-26 12:03:30,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 143 transitions. [2023-11-26 12:03:30,278 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 143 transitions. Word has length 88 [2023-11-26 12:03:30,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:03:30,278 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 143 transitions. [2023-11-26 12:03:30,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 43 states have internal predecessors, (86), 22 states have call successors, (45), 6 states have call predecessors, (45), 12 states have return successors, (42), 25 states have call predecessors, (42), 21 states have call successors, (42) [2023-11-26 12:03:30,279 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 143 transitions. [2023-11-26 12:03:30,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-26 12:03:30,287 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:03:30,288 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:03:30,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb213fe-d5a3-4f5c-81dd-5c4054f06c0c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 12:03:30,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb213fe-d5a3-4f5c-81dd-5c4054f06c0c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:30,499 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:03:30,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:30,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1140813054, now seen corresponding path program 1 times [2023-11-26 12:03:30,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:30,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094439133] [2023-11-26 12:03:30,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:30,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:50,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 12:03:50,693 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.