./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_string_eq_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f045a0-16d1-4075-9cd4-c846ce1287fe/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f045a0-16d1-4075-9cd4-c846ce1287fe/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f045a0-16d1-4075-9cd4-c846ce1287fe/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f045a0-16d1-4075-9cd4-c846ce1287fe/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_string_eq_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f045a0-16d1-4075-9cd4-c846ce1287fe/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f045a0-16d1-4075-9cd4-c846ce1287fe/bin/utaipan-verify-t7M7D8N6sZ --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 Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 8b61e347701f0c89420e753e852eb314cc29dd4fd4a4715a05b300c448d0ac03 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:50:35,034 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:50:35,193 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f045a0-16d1-4075-9cd4-c846ce1287fe/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-19 04:50:35,204 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:50:35,206 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:50:35,253 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:50:35,254 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:50:35,255 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:50:35,256 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:50:35,262 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:50:35,263 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:50:35,263 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:50:35,264 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:50:35,266 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:50:35,267 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:50:35,267 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:50:35,268 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:50:35,268 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:50:35,269 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:50:35,270 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:50:35,270 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:50:35,271 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:50:35,273 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:50:35,273 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:50:35,274 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:50:35,274 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:50:35,275 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:50:35,275 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:50:35,276 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:50:35,276 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:50:35,278 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:50:35,278 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:50:35,279 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:50:35,279 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:50:35,280 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:50:35,280 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:50:35,280 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:50:35,281 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:50:35,282 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:50:35,282 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:50:35,282 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:50:35,283 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:50:35,283 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_43f045a0-16d1-4075-9cd4-c846ce1287fe/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f045a0-16d1-4075-9cd4-c846ce1287fe/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8b61e347701f0c89420e753e852eb314cc29dd4fd4a4715a05b300c448d0ac03 [2023-11-19 04:50:35,668 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:50:35,704 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:50:35,707 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:50:35,709 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:50:35,709 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:50:35,711 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f045a0-16d1-4075-9cd4-c846ce1287fe/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/aws-c-common/aws_string_eq_harness.i [2023-11-19 04:50:38,913 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:50:39,771 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:50:39,773 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f045a0-16d1-4075-9cd4-c846ce1287fe/sv-benchmarks/c/aws-c-common/aws_string_eq_harness.i [2023-11-19 04:50:39,822 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f045a0-16d1-4075-9cd4-c846ce1287fe/bin/utaipan-verify-t7M7D8N6sZ/data/52fe9f0ab/ed49cb280ba04e37b77f44b4505de5ac/FLAG0382016c8 [2023-11-19 04:50:39,843 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f045a0-16d1-4075-9cd4-c846ce1287fe/bin/utaipan-verify-t7M7D8N6sZ/data/52fe9f0ab/ed49cb280ba04e37b77f44b4505de5ac [2023-11-19 04:50:39,850 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:50:39,852 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:50:39,855 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:50:39,856 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:50:39,862 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:50:39,863 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:50:39" (1/1) ... [2023-11-19 04:50:39,865 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b7ec6fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:39, skipping insertion in model container [2023-11-19 04:50:39,865 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:50:39" (1/1) ... [2023-11-19 04:50:40,048 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:50:40,357 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_43f045a0-16d1-4075-9cd4-c846ce1287fe/sv-benchmarks/c/aws-c-common/aws_string_eq_harness.i[4487,4500] [2023-11-19 04:50:40,366 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_43f045a0-16d1-4075-9cd4-c846ce1287fe/sv-benchmarks/c/aws-c-common/aws_string_eq_harness.i[4547,4560] [2023-11-19 04:50:41,575 WARN L1588 CHandler]: Possible shadowing of function index [2023-11-19 04:50:41,576 WARN L1588 CHandler]: Possible shadowing of function index [2023-11-19 04:50:41,576 WARN L1588 CHandler]: Possible shadowing of function index [2023-11-19 04:50:41,577 WARN L1588 CHandler]: Possible shadowing of function index [2023-11-19 04:50:41,579 WARN L1588 CHandler]: Possible shadowing of function index [2023-11-19 04:50:41,596 WARN L1588 CHandler]: Possible shadowing of function index [2023-11-19 04:50:41,597 WARN L1588 CHandler]: Possible shadowing of function index [2023-11-19 04:50:41,599 WARN L1588 CHandler]: Possible shadowing of function index [2023-11-19 04:50:41,622 WARN L1588 CHandler]: Possible shadowing of function index [2023-11-19 04:50:42,082 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-19 04:50:42,084 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-19 04:50:42,085 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-19 04:50:42,087 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-19 04:50:42,090 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-19 04:50:42,091 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-19 04:50:42,092 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-19 04:50:42,093 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-19 04:50:42,094 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-19 04:50:42,096 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-19 04:50:42,436 WARN L1588 CHandler]: Possible shadowing of function index [2023-11-19 04:50:42,436 WARN L1588 CHandler]: Possible shadowing of function index [2023-11-19 04:50:42,461 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:50:42,509 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:50:42,525 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_43f045a0-16d1-4075-9cd4-c846ce1287fe/sv-benchmarks/c/aws-c-common/aws_string_eq_harness.i[4487,4500] [2023-11-19 04:50:42,526 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_43f045a0-16d1-4075-9cd4-c846ce1287fe/sv-benchmarks/c/aws-c-common/aws_string_eq_harness.i[4547,4560] [2023-11-19 04:50:42,568 WARN L1588 CHandler]: Possible shadowing of function index [2023-11-19 04:50:42,569 WARN L1588 CHandler]: Possible shadowing of function index [2023-11-19 04:50:42,570 WARN L1588 CHandler]: Possible shadowing of function index [2023-11-19 04:50:42,570 WARN L1588 CHandler]: Possible shadowing of function index [2023-11-19 04:50:42,571 WARN L1588 CHandler]: Possible shadowing of function index [2023-11-19 04:50:42,582 WARN L1588 CHandler]: Possible shadowing of function index [2023-11-19 04:50:42,583 WARN L1588 CHandler]: Possible shadowing of function index [2023-11-19 04:50:42,584 WARN L1588 CHandler]: Possible shadowing of function index [2023-11-19 04:50:42,585 WARN L1588 CHandler]: Possible shadowing of function index [2023-11-19 04:50:42,620 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-19 04:50:42,621 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-19 04:50:42,622 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-19 04:50:42,623 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-19 04:50:42,624 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-19 04:50:42,624 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-19 04:50:42,625 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-19 04:50:42,626 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-19 04:50:42,626 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-19 04:50:42,627 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-19 04:50:42,715 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : "+r"(index)); [8588] [2023-11-19 04:50:42,717 WARN L1588 CHandler]: Possible shadowing of function index [2023-11-19 04:50:42,718 WARN L1588 CHandler]: Possible shadowing of function index [2023-11-19 04:50:42,733 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:50:43,073 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 04:50:43,073 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 04:50:43,074 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 04:50:43,074 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 04:50:43,074 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 04:50:43,074 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 04:50:43,075 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 04:50:43,075 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 04:50:43,076 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 04:50:43,076 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 04:50:43,076 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 04:50:43,076 WARN L675 CHandler]: The function predicate is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 04:50:43,077 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 04:50:43,078 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 04:50:43,078 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 04:50:43,078 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 04:50:43,079 WARN L675 CHandler]: The function memchr is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 04:50:43,086 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:50:43,088 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:43 WrapperNode [2023-11-19 04:50:43,088 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:50:43,089 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:50:43,090 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:50:43,090 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:50:43,098 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:43" (1/1) ... [2023-11-19 04:50:43,229 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:43" (1/1) ... [2023-11-19 04:50:43,318 INFO L138 Inliner]: procedures = 680, calls = 2275, calls flagged for inlining = 58, calls inlined = 6, statements flattened = 384 [2023-11-19 04:50:43,320 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:50:43,321 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:50:43,321 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:50:43,321 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:50:43,332 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:43" (1/1) ... [2023-11-19 04:50:43,332 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:43" (1/1) ... [2023-11-19 04:50:43,339 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:43" (1/1) ... [2023-11-19 04:50:43,340 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:43" (1/1) ... [2023-11-19 04:50:43,381 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:43" (1/1) ... [2023-11-19 04:50:43,396 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:43" (1/1) ... [2023-11-19 04:50:43,402 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:43" (1/1) ... [2023-11-19 04:50:43,420 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:43" (1/1) ... [2023-11-19 04:50:43,427 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:50:43,428 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:50:43,429 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:50:43,429 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:50:43,430 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:43" (1/1) ... [2023-11-19 04:50:43,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:50:43,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f045a0-16d1-4075-9cd4-c846ce1287fe/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:50:43,470 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f045a0-16d1-4075-9cd4-c846ce1287fe/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:50:43,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f045a0-16d1-4075-9cd4-c846ce1287fe/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:50:43,521 INFO L130 BoogieDeclarations]: Found specification of procedure aws_string_is_valid [2023-11-19 04:50:43,522 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_string_is_valid [2023-11-19 04:50:43,523 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_string_is_allocated_bounded_length [2023-11-19 04:50:43,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_string_is_allocated_bounded_length [2023-11-19 04:50:43,524 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2023-11-19 04:50:43,524 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-19 04:50:43,524 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-19 04:50:43,525 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 04:50:43,525 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-19 04:50:43,525 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-19 04:50:43,525 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 04:50:43,525 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:50:43,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 04:50:43,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:50:43,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:50:43,527 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-19 04:50:43,528 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-19 04:50:43,528 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 04:50:43,528 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 04:50:43,528 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_eq [2023-11-19 04:50:43,528 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_eq [2023-11-19 04:50:43,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-19 04:50:43,529 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-11-19 04:50:43,529 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-11-19 04:50:43,529 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-11-19 04:50:43,529 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-11-19 04:50:43,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 04:50:43,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:50:43,865 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:50:43,868 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:50:44,334 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:50:44,458 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:50:44,458 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-19 04:50:44,464 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:50:44 BoogieIcfgContainer [2023-11-19 04:50:44,467 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:50:44,471 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:50:44,474 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:50:44,478 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:50:44,481 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:50:39" (1/3) ... [2023-11-19 04:50:44,482 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20dad276 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:50:44, skipping insertion in model container [2023-11-19 04:50:44,482 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:43" (2/3) ... [2023-11-19 04:50:44,483 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20dad276 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:50:44, skipping insertion in model container [2023-11-19 04:50:44,485 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:50:44" (3/3) ... [2023-11-19 04:50:44,486 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_string_eq_harness.i [2023-11-19 04:50:44,501 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:50:44,502 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 04:50:44,567 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:50:44,581 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=FINITE_AUTOMATA, 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;@8ce9d64, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:50:44,581 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 04:50:44,586 INFO L276 IsEmpty]: Start isEmpty. Operand has 84 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 48 states have internal predecessors, (58), 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) [2023-11-19 04:50:44,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-19 04:50:44,600 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:50:44,601 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-19 04:50:44,602 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:50:44,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:50:44,608 INFO L85 PathProgramCache]: Analyzing trace with hash 794474321, now seen corresponding path program 1 times [2023-11-19 04:50:44,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:50:44,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010646536] [2023-11-19 04:50:44,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:44,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:50:44,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:45,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 04:50:45,512 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:50:45,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010646536] [2023-11-19 04:50:45,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010646536] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:50:45,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:50:45,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:50:45,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640837141] [2023-11-19 04:50:45,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:50:45,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:50:45,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:50:45,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:50:45,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:50:45,564 INFO L87 Difference]: Start difference. First operand has 84 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 48 states have internal predecessors, (58), 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 4.25) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 04:50:45,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:50:45,750 INFO L93 Difference]: Finished difference Result 138 states and 188 transitions. [2023-11-19 04:50:45,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:50:45,753 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2023-11-19 04:50:45,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:50:45,764 INFO L225 Difference]: With dead ends: 138 [2023-11-19 04:50:45,764 INFO L226 Difference]: Without dead ends: 81 [2023-11-19 04:50:45,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:50:45,780 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 11 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:50:45,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 281 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:50:45,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-11-19 04:50:45,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-11-19 04:50:45,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 46 states have internal predecessors, (53), 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) [2023-11-19 04:50:45,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 104 transitions. [2023-11-19 04:50:45,851 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 104 transitions. Word has length 28 [2023-11-19 04:50:45,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:50:45,853 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 104 transitions. [2023-11-19 04:50:45,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 04:50:45,855 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 104 transitions. [2023-11-19 04:50:45,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-19 04:50:45,861 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:50:45,861 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:50:45,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:50:45,867 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:50:45,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:50:45,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1665732573, now seen corresponding path program 1 times [2023-11-19 04:50:45,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:50:45,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20138978] [2023-11-19 04:50:45,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:45,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:50:45,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:46,704 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-19 04:50:46,704 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:50:46,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20138978] [2023-11-19 04:50:46,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20138978] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:50:46,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:50:46,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-19 04:50:46,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324063471] [2023-11-19 04:50:46,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:50:46,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 04:50:46,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:50:46,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 04:50:46,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-11-19 04:50:46,710 INFO L87 Difference]: Start difference. First operand 81 states and 104 transitions. Second operand has 10 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-19 04:50:46,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:50:46,945 INFO L93 Difference]: Finished difference Result 127 states and 163 transitions. [2023-11-19 04:50:46,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 04:50:46,946 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) Word has length 53 [2023-11-19 04:50:46,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:50:46,950 INFO L225 Difference]: With dead ends: 127 [2023-11-19 04:50:46,950 INFO L226 Difference]: Without dead ends: 81 [2023-11-19 04:50:46,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-11-19 04:50:46,952 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 29 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:50:46,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 725 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:50:46,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-11-19 04:50:46,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-11-19 04:50:46,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 46 states have internal predecessors, (52), 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) [2023-11-19 04:50:46,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 103 transitions. [2023-11-19 04:50:46,980 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 103 transitions. Word has length 53 [2023-11-19 04:50:46,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:50:46,981 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 103 transitions. [2023-11-19 04:50:46,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-19 04:50:46,983 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 103 transitions. [2023-11-19 04:50:46,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-19 04:50:46,986 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:50:46,987 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:50:46,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 04:50:46,987 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:50:46,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:50:46,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1264304402, now seen corresponding path program 1 times [2023-11-19 04:50:46,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:50:46,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413382430] [2023-11-19 04:50:46,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:46,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:50:47,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:47,907 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-19 04:50:47,907 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:50:47,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413382430] [2023-11-19 04:50:47,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413382430] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:50:47,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:50:47,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-19 04:50:47,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222681063] [2023-11-19 04:50:47,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:50:47,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 04:50:47,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:50:47,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 04:50:47,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2023-11-19 04:50:47,910 INFO L87 Difference]: Start difference. First operand 81 states and 103 transitions. Second operand has 13 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2023-11-19 04:50:48,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:50:48,320 INFO L93 Difference]: Finished difference Result 138 states and 178 transitions. [2023-11-19 04:50:48,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 04:50:48,320 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) Word has length 57 [2023-11-19 04:50:48,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:50:48,322 INFO L225 Difference]: With dead ends: 138 [2023-11-19 04:50:48,322 INFO L226 Difference]: Without dead ends: 97 [2023-11-19 04:50:48,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2023-11-19 04:50:48,324 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 51 mSDsluCounter, 820 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 900 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:50:48,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 900 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:50:48,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-11-19 04:50:48,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 88. [2023-11-19 04:50:48,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 50 states have (on average 1.14) internal successors, (57), 51 states have internal predecessors, (57), 28 states have call successors, (28), 9 states have call predecessors, (28), 9 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2023-11-19 04:50:48,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 112 transitions. [2023-11-19 04:50:48,338 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 112 transitions. Word has length 57 [2023-11-19 04:50:48,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:50:48,339 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 112 transitions. [2023-11-19 04:50:48,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2023-11-19 04:50:48,339 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 112 transitions. [2023-11-19 04:50:48,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-19 04:50:48,342 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:50:48,342 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 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] [2023-11-19 04:50:48,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 04:50:48,343 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:50:48,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:50:48,344 INFO L85 PathProgramCache]: Analyzing trace with hash -506411013, now seen corresponding path program 1 times [2023-11-19 04:50:48,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:50:48,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941512561] [2023-11-19 04:50:48,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:48,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:50:49,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:52,427 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-19 04:50:52,427 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:50:52,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941512561] [2023-11-19 04:50:52,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941512561] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:50:52,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:50:52,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-11-19 04:50:52,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583645035] [2023-11-19 04:50:52,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:50:52,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-19 04:50:52,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:50:52,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 04:50:52,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2023-11-19 04:50:52,431 INFO L87 Difference]: Start difference. First operand 88 states and 112 transitions. Second operand has 16 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) [2023-11-19 04:50:52,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:50:52,946 INFO L93 Difference]: Finished difference Result 120 states and 157 transitions. [2023-11-19 04:50:52,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-19 04:50:52,947 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) Word has length 61 [2023-11-19 04:50:52,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:50:52,952 INFO L225 Difference]: With dead ends: 120 [2023-11-19 04:50:52,952 INFO L226 Difference]: Without dead ends: 118 [2023-11-19 04:50:52,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2023-11-19 04:50:52,956 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 58 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 963 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 04:50:52,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 963 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 04:50:52,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-11-19 04:50:52,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 103. [2023-11-19 04:50:52,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 60 states have (on average 1.15) internal successors, (69), 62 states have internal predecessors, (69), 32 states have call successors, (32), 10 states have call predecessors, (32), 10 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2023-11-19 04:50:52,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 132 transitions. [2023-11-19 04:50:52,992 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 132 transitions. Word has length 61 [2023-11-19 04:50:52,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:50:52,993 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 132 transitions. [2023-11-19 04:50:52,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) [2023-11-19 04:50:52,994 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 132 transitions. [2023-11-19 04:50:53,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-19 04:50:53,001 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:50:53,001 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 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] [2023-11-19 04:50:53,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 04:50:53,002 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:50:53,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:50:53,002 INFO L85 PathProgramCache]: Analyzing trace with hash 541333734, now seen corresponding path program 1 times [2023-11-19 04:50:53,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:50:53,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410316791] [2023-11-19 04:50:53,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:53,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:50:53,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:55,213 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-19 04:50:55,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:50:55,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410316791] [2023-11-19 04:50:55,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410316791] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:50:55,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:50:55,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-11-19 04:50:55,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059505606] [2023-11-19 04:50:55,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:50:55,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 04:50:55,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:50:55,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 04:50:55,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2023-11-19 04:50:55,220 INFO L87 Difference]: Start difference. First operand 103 states and 132 transitions. Second operand has 15 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2023-11-19 04:50:55,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:50:55,758 INFO L93 Difference]: Finished difference Result 125 states and 161 transitions. [2023-11-19 04:50:55,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-19 04:50:55,759 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) Word has length 67 [2023-11-19 04:50:55,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:50:55,764 INFO L225 Difference]: With dead ends: 125 [2023-11-19 04:50:55,764 INFO L226 Difference]: Without dead ends: 123 [2023-11-19 04:50:55,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2023-11-19 04:50:55,769 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 87 mSDsluCounter, 874 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 957 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 04:50:55,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 957 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 04:50:55,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-11-19 04:50:55,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 109. [2023-11-19 04:50:55,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 64 states have (on average 1.140625) internal successors, (73), 66 states have internal predecessors, (73), 33 states have call successors, (33), 11 states have call predecessors, (33), 11 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2023-11-19 04:50:55,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 138 transitions. [2023-11-19 04:50:55,802 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 138 transitions. Word has length 67 [2023-11-19 04:50:55,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:50:55,805 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 138 transitions. [2023-11-19 04:50:55,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2023-11-19 04:50:55,805 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 138 transitions. [2023-11-19 04:50:55,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-11-19 04:50:55,810 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:50:55,810 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 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] [2023-11-19 04:50:55,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 04:50:55,810 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:50:55,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:50:55,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1650520216, now seen corresponding path program 1 times [2023-11-19 04:50:55,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:50:55,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334646318] [2023-11-19 04:50:55,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:55,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:50:55,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:56,663 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-11-19 04:50:56,663 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:50:56,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334646318] [2023-11-19 04:50:56,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334646318] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:50:56,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606270908] [2023-11-19 04:50:56,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:56,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:50:56,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f045a0-16d1-4075-9cd4-c846ce1287fe/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:50:56,667 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f045a0-16d1-4075-9cd4-c846ce1287fe/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:50:56,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f045a0-16d1-4075-9cd4-c846ce1287fe/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:50:57,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:57,048 INFO L262 TraceCheckSpWp]: Trace formula consists of 956 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-19 04:50:57,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:50:57,278 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-11-19 04:50:57,278 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:50:57,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606270908] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:50:57,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:50:57,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13] total 18 [2023-11-19 04:50:57,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49367239] [2023-11-19 04:50:57,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:50:57,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 04:50:57,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:50:57,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 04:50:57,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2023-11-19 04:50:57,282 INFO L87 Difference]: Start difference. First operand 109 states and 138 transitions. Second operand has 11 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) [2023-11-19 04:50:57,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:50:57,604 INFO L93 Difference]: Finished difference Result 145 states and 183 transitions. [2023-11-19 04:50:57,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 04:50:57,605 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) Word has length 82 [2023-11-19 04:50:57,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:50:57,608 INFO L225 Difference]: With dead ends: 145 [2023-11-19 04:50:57,608 INFO L226 Difference]: Without dead ends: 109 [2023-11-19 04:50:57,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2023-11-19 04:50:57,610 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 24 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:50:57,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 1014 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:50:57,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-11-19 04:50:57,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2023-11-19 04:50:57,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 64 states have (on average 1.125) internal successors, (72), 66 states have internal predecessors, (72), 33 states have call successors, (33), 11 states have call predecessors, (33), 11 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2023-11-19 04:50:57,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 137 transitions. [2023-11-19 04:50:57,628 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 137 transitions. Word has length 82 [2023-11-19 04:50:57,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:50:57,630 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 137 transitions. [2023-11-19 04:50:57,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) [2023-11-19 04:50:57,630 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 137 transitions. [2023-11-19 04:50:57,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-19 04:50:57,632 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:50:57,632 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 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] [2023-11-19 04:50:57,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f045a0-16d1-4075-9cd4-c846ce1287fe/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 04:50:57,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f045a0-16d1-4075-9cd4-c846ce1287fe/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 04:50:57,860 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:50:57,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:50:57,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1945713535, now seen corresponding path program 1 times [2023-11-19 04:50:57,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:50:57,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166891222] [2023-11-19 04:50:57,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:57,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:50:57,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:59,102 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-19 04:50:59,102 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:50:59,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166891222] [2023-11-19 04:50:59,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166891222] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:50:59,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363524968] [2023-11-19 04:50:59,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:59,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:50:59,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f045a0-16d1-4075-9cd4-c846ce1287fe/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:50:59,105 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f045a0-16d1-4075-9cd4-c846ce1287fe/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:50:59,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f045a0-16d1-4075-9cd4-c846ce1287fe/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 04:50:59,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:59,469 INFO L262 TraceCheckSpWp]: Trace formula consists of 975 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-19 04:50:59,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:50:59,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-19 04:50:59,750 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-19 04:50:59,751 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2023-11-19 04:50:59,788 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-19 04:50:59,788 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:51:00,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363524968] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:51:00,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [425311259] [2023-11-19 04:51:00,095 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2023-11-19 04:51:00,095 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:51:00,099 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:51:00,105 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:51:00,105 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs