./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_string_new_from_c_str_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22719245-8007-4026-ac90-7e29eb21912e/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22719245-8007-4026-ac90-7e29eb21912e/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22719245-8007-4026-ac90-7e29eb21912e/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22719245-8007-4026-ac90-7e29eb21912e/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_string_new_from_c_str_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22719245-8007-4026-ac90-7e29eb21912e/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22719245-8007-4026-ac90-7e29eb21912e/bin/utaipan-verify-NcY6lQBIFX --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 d8feb785efb60d35f9204dc33a12e80ea59efcec5de2b7c2ff320ef29197b0bd --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:59:31,314 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:59:31,397 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22719245-8007-4026-ac90-7e29eb21912e/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-12 00:59:31,403 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:59:31,404 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:59:31,433 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:59:31,434 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:59:31,434 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:59:31,435 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:59:31,436 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:59:31,436 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:59:31,437 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:59:31,438 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:59:31,438 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:59:31,439 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:59:31,439 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:59:31,440 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:59:31,441 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:59:31,441 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:59:31,442 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:59:31,443 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:59:31,443 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:59:31,444 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:59:31,445 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:59:31,446 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:59:31,446 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:59:31,447 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:59:31,447 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:59:31,448 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:59:31,448 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:59:31,449 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:59:31,449 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:59:31,450 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:59:31,450 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:59:31,451 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:59:31,451 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:59:31,451 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:59:31,452 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:59:31,452 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:59:31,452 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:59:31,452 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:59:31,453 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:59:31,453 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_22719245-8007-4026-ac90-7e29eb21912e/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22719245-8007-4026-ac90-7e29eb21912e/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8feb785efb60d35f9204dc33a12e80ea59efcec5de2b7c2ff320ef29197b0bd [2023-11-12 00:59:31,749 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:59:31,779 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:59:31,782 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:59:31,784 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:59:31,785 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:59:31,787 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22719245-8007-4026-ac90-7e29eb21912e/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/aws-c-common/aws_string_new_from_c_str_harness.i [2023-11-12 00:59:34,909 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:59:35,612 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:59:35,612 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22719245-8007-4026-ac90-7e29eb21912e/sv-benchmarks/c/aws-c-common/aws_string_new_from_c_str_harness.i [2023-11-12 00:59:35,669 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22719245-8007-4026-ac90-7e29eb21912e/bin/utaipan-verify-NcY6lQBIFX/data/ea99cc353/133a00ee520c4aa487874d725d48c798/FLAG3e3c388e9 [2023-11-12 00:59:35,688 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22719245-8007-4026-ac90-7e29eb21912e/bin/utaipan-verify-NcY6lQBIFX/data/ea99cc353/133a00ee520c4aa487874d725d48c798 [2023-11-12 00:59:35,691 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:59:35,693 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:59:35,694 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:59:35,694 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:59:35,701 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:59:35,702 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:59:35" (1/1) ... [2023-11-12 00:59:35,703 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c82da4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:35, skipping insertion in model container [2023-11-12 00:59:35,704 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:59:35" (1/1) ... [2023-11-12 00:59:35,883 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:59:36,229 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_22719245-8007-4026-ac90-7e29eb21912e/sv-benchmarks/c/aws-c-common/aws_string_new_from_c_str_harness.i[4499,4512] [2023-11-12 00:59:36,239 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_22719245-8007-4026-ac90-7e29eb21912e/sv-benchmarks/c/aws-c-common/aws_string_new_from_c_str_harness.i[4559,4572] [2023-11-12 00:59:37,675 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:37,688 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:37,688 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:37,689 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:37,691 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:37,708 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:37,709 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:37,711 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:37,712 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:38,318 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-12 00:59:38,319 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-12 00:59:38,321 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-12 00:59:38,323 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-12 00:59:38,325 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-12 00:59:38,326 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-12 00:59:38,327 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-12 00:59:38,328 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-12 00:59:38,329 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-12 00:59:38,330 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-12 00:59:38,819 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:38,824 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:38,934 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:59:38,993 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:59:39,027 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_22719245-8007-4026-ac90-7e29eb21912e/sv-benchmarks/c/aws-c-common/aws_string_new_from_c_str_harness.i[4499,4512] [2023-11-12 00:59:39,027 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_22719245-8007-4026-ac90-7e29eb21912e/sv-benchmarks/c/aws-c-common/aws_string_new_from_c_str_harness.i[4559,4572] [2023-11-12 00:59:39,075 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:39,076 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:39,077 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:39,077 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:39,078 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:39,087 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:39,087 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:39,089 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:39,089 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:39,145 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-12 00:59:39,146 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-12 00:59:39,147 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-12 00:59:39,148 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-12 00:59:39,149 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-12 00:59:39,150 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-12 00:59:39,150 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-12 00:59:39,151 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-12 00:59:39,151 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-12 00:59:39,152 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-12 00:59:39,252 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : "+r"(index)); [8269] [2023-11-12 00:59:39,254 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:39,256 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:39,269 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [8755-8766] [2023-11-12 00:59:39,306 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:59:39,651 WARN L672 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:39,652 WARN L672 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:39,652 WARN L672 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:39,652 WARN L672 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:39,652 WARN L672 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:39,653 WARN L672 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:39,653 WARN L672 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:39,653 WARN L672 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:39,653 WARN L672 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:39,653 WARN L672 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:39,653 WARN L672 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:39,654 WARN L672 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:39,654 WARN L672 CHandler]: The function predicate is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:39,654 WARN L672 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:39,654 WARN L672 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:39,654 WARN L672 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:39,654 WARN L672 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:39,655 WARN L672 CHandler]: The function memchr is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:39,663 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:59:39,663 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:39 WrapperNode [2023-11-12 00:59:39,664 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:59:39,665 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:59:39,665 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:59:39,665 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:59:39,673 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:39" (1/1) ... [2023-11-12 00:59:39,770 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:39" (1/1) ... [2023-11-12 00:59:39,909 INFO L138 Inliner]: procedures = 689, calls = 2738, calls flagged for inlining = 62, calls inlined = 9, statements flattened = 811 [2023-11-12 00:59:39,910 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:59:39,911 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:59:39,911 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:59:39,912 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:59:39,922 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:39" (1/1) ... [2023-11-12 00:59:39,922 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:39" (1/1) ... [2023-11-12 00:59:39,942 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:39" (1/1) ... [2023-11-12 00:59:39,943 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:39" (1/1) ... [2023-11-12 00:59:40,002 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:39" (1/1) ... [2023-11-12 00:59:40,023 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:39" (1/1) ... [2023-11-12 00:59:40,030 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:39" (1/1) ... [2023-11-12 00:59:40,046 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:39" (1/1) ... [2023-11-12 00:59:40,061 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:59:40,062 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:59:40,062 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:59:40,062 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:59:40,064 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:39" (1/1) ... [2023-11-12 00:59:40,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:59:40,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22719245-8007-4026-ac90-7e29eb21912e/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:59:40,099 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22719245-8007-4026-ac90-7e29eb21912e/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:59:40,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22719245-8007-4026-ac90-7e29eb21912e/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:59:40,159 INFO L130 BoogieDeclarations]: Found specification of procedure aws_string_is_valid [2023-11-12 00:59:40,159 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_string_is_valid [2023-11-12 00:59:40,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:59:40,160 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-12 00:59:40,160 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-12 00:59:40,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~real [2023-11-12 00:59:40,160 INFO L130 BoogieDeclarations]: Found specification of procedure aws_allocator_is_valid [2023-11-12 00:59:40,160 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_allocator_is_valid [2023-11-12 00:59:40,161 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-12 00:59:40,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-12 00:59:40,161 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:59:40,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-11-12 00:59:40,162 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-11-12 00:59:40,163 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-12 00:59:40,163 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-12 00:59:40,163 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-12 00:59:40,163 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-12 00:59:40,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 00:59:40,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:59:40,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 00:59:40,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:59:40,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:59:40,164 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-12 00:59:40,164 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-12 00:59:40,165 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-12 00:59:40,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-12 00:59:40,165 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2023-11-12 00:59:40,165 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2023-11-12 00:59:40,166 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 00:59:40,166 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 00:59:40,166 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_acquire [2023-11-12 00:59:40,166 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_acquire [2023-11-12 00:59:40,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:59:40,167 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2023-11-12 00:59:40,167 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2023-11-12 00:59:40,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-12 00:59:40,167 INFO L130 BoogieDeclarations]: Found specification of procedure aws_string_new_from_array [2023-11-12 00:59:40,168 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_string_new_from_array [2023-11-12 00:59:40,168 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-11-12 00:59:40,168 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-11-12 00:59:40,168 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2023-11-12 00:59:40,169 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2023-11-12 00:59:40,169 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-11-12 00:59:40,169 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-11-12 00:59:40,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:59:40,169 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~real [2023-11-12 00:59:40,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:59:40,508 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:59:40,510 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:59:40,710 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##9: assume !true; [2023-11-12 00:59:42,362 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:59:42,533 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:59:42,533 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-12 00:59:42,536 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:59:42 BoogieIcfgContainer [2023-11-12 00:59:42,536 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:59:42,539 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:59:42,539 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:59:42,542 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:59:42,542 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:59:35" (1/3) ... [2023-11-12 00:59:42,543 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13ffd416 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:59:42, skipping insertion in model container [2023-11-12 00:59:42,543 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:39" (2/3) ... [2023-11-12 00:59:42,544 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13ffd416 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:59:42, skipping insertion in model container [2023-11-12 00:59:42,544 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:59:42" (3/3) ... [2023-11-12 00:59:42,545 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_string_new_from_c_str_harness.i [2023-11-12 00:59:42,565 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:59:42,566 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:59:42,620 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:59:42,627 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;@5404b646, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:59:42,627 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:59:42,632 INFO L276 IsEmpty]: Start isEmpty. Operand has 109 states, 59 states have (on average 1.1864406779661016) internal successors, (70), 59 states have internal predecessors, (70), 34 states have call successors, (34), 15 states have call predecessors, (34), 15 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-12 00:59:42,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-12 00:59:42,642 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:42,643 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:42,643 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:42,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:42,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1404896604, now seen corresponding path program 1 times [2023-11-12 00:59:42,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:42,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985928013] [2023-11-12 00:59:42,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:42,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:43,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:43,846 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-12 00:59:43,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:43,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985928013] [2023-11-12 00:59:43,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985928013] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:43,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:43,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 00:59:43,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055162494] [2023-11-12 00:59:43,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:43,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:59:43,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:43,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:59:43,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:59:43,952 INFO L87 Difference]: Start difference. First operand has 109 states, 59 states have (on average 1.1864406779661016) internal successors, (70), 59 states have internal predecessors, (70), 34 states have call successors, (34), 15 states have call predecessors, (34), 15 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-12 00:59:44,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:44,205 INFO L93 Difference]: Finished difference Result 150 states and 194 transitions. [2023-11-12 00:59:44,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:59:44,208 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) Word has length 54 [2023-11-12 00:59:44,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:44,221 INFO L225 Difference]: With dead ends: 150 [2023-11-12 00:59:44,221 INFO L226 Difference]: Without dead ends: 111 [2023-11-12 00:59:44,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:59:44,233 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 1 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:44,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 460 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:59:44,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-11-12 00:59:44,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2023-11-12 00:59:44,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 60 states have (on average 1.1666666666666667) internal successors, (70), 61 states have internal predecessors, (70), 34 states have call successors, (34), 15 states have call predecessors, (34), 16 states have return successors, (34), 34 states have call predecessors, (34), 33 states have call successors, (34) [2023-11-12 00:59:44,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 138 transitions. [2023-11-12 00:59:44,326 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 138 transitions. Word has length 54 [2023-11-12 00:59:44,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:44,329 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 138 transitions. [2023-11-12 00:59:44,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-12 00:59:44,330 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 138 transitions. [2023-11-12 00:59:44,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-12 00:59:44,336 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:44,336 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:44,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:59:44,337 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:44,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:44,337 INFO L85 PathProgramCache]: Analyzing trace with hash 301870079, now seen corresponding path program 1 times [2023-11-12 00:59:44,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:44,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128551654] [2023-11-12 00:59:44,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:44,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:44,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:45,357 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-12 00:59:45,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:45,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128551654] [2023-11-12 00:59:45,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128551654] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:45,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:45,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 00:59:45,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807247190] [2023-11-12 00:59:45,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:45,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:59:45,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:45,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:59:45,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:59:45,362 INFO L87 Difference]: Start difference. First operand 111 states and 138 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-12 00:59:45,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:45,533 INFO L93 Difference]: Finished difference Result 147 states and 180 transitions. [2023-11-12 00:59:45,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:59:45,534 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 58 [2023-11-12 00:59:45,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:45,536 INFO L225 Difference]: With dead ends: 147 [2023-11-12 00:59:45,536 INFO L226 Difference]: Without dead ends: 117 [2023-11-12 00:59:45,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:59:45,539 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 2 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:45,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 457 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:59:45,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-11-12 00:59:45,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2023-11-12 00:59:45,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 64 states have internal predecessors, (73), 34 states have call successors, (34), 15 states have call predecessors, (34), 17 states have return successors, (35), 35 states have call predecessors, (35), 33 states have call successors, (35) [2023-11-12 00:59:45,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 142 transitions. [2023-11-12 00:59:45,554 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 142 transitions. Word has length 58 [2023-11-12 00:59:45,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:45,554 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 142 transitions. [2023-11-12 00:59:45,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-12 00:59:45,555 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 142 transitions. [2023-11-12 00:59:45,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-12 00:59:45,556 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:45,556 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:45,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:59:45,557 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:45,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:45,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1456475352, now seen corresponding path program 1 times [2023-11-12 00:59:45,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:45,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383195912] [2023-11-12 00:59:45,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:45,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:45,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:46,865 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-12 00:59:46,865 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:46,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383195912] [2023-11-12 00:59:46,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383195912] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:46,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:46,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-12 00:59:46,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103610171] [2023-11-12 00:59:46,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:46,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 00:59:46,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:46,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 00:59:46,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-12 00:59:46,872 INFO L87 Difference]: Start difference. First operand 115 states and 142 transitions. Second operand has 9 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2023-11-12 00:59:47,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:47,166 INFO L93 Difference]: Finished difference Result 121 states and 147 transitions. [2023-11-12 00:59:47,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 00:59:47,169 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) Word has length 59 [2023-11-12 00:59:47,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:47,172 INFO L225 Difference]: With dead ends: 121 [2023-11-12 00:59:47,172 INFO L226 Difference]: Without dead ends: 108 [2023-11-12 00:59:47,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-12 00:59:47,176 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 16 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 866 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:47,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 866 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:59:47,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-11-12 00:59:47,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 104. [2023-11-12 00:59:47,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 56 states have internal predecessors, (62), 33 states have call successors, (33), 15 states have call predecessors, (33), 15 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2023-11-12 00:59:47,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 127 transitions. [2023-11-12 00:59:47,196 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 127 transitions. Word has length 59 [2023-11-12 00:59:47,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:47,197 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 127 transitions. [2023-11-12 00:59:47,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2023-11-12 00:59:47,197 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 127 transitions. [2023-11-12 00:59:47,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-12 00:59:47,207 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:47,207 INFO L195 NwaCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:47,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 00:59:47,208 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:47,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:47,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1933523755, now seen corresponding path program 1 times [2023-11-12 00:59:47,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:47,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939884823] [2023-11-12 00:59:47,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:47,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:47,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:48,048 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-12 00:59:48,048 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:48,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939884823] [2023-11-12 00:59:48,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939884823] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:48,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:48,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:59:48,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937517504] [2023-11-12 00:59:48,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:48,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:59:48,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:48,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:59:48,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:59:48,054 INFO L87 Difference]: Start difference. First operand 104 states and 127 transitions. Second operand has 6 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-12 00:59:48,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:48,209 INFO L93 Difference]: Finished difference Result 154 states and 186 transitions. [2023-11-12 00:59:48,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:59:48,210 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) Word has length 89 [2023-11-12 00:59:48,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:48,217 INFO L225 Difference]: With dead ends: 154 [2023-11-12 00:59:48,217 INFO L226 Difference]: Without dead ends: 110 [2023-11-12 00:59:48,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:59:48,222 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 3 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:48,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 540 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:59:48,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-11-12 00:59:48,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2023-11-12 00:59:48,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 59 states have internal predecessors, (65), 33 states have call successors, (33), 15 states have call predecessors, (33), 16 states have return successors, (33), 33 states have call predecessors, (33), 32 states have call successors, (33) [2023-11-12 00:59:48,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 131 transitions. [2023-11-12 00:59:48,240 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 131 transitions. Word has length 89 [2023-11-12 00:59:48,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:48,241 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 131 transitions. [2023-11-12 00:59:48,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-12 00:59:48,241 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 131 transitions. [2023-11-12 00:59:48,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-12 00:59:48,243 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:48,243 INFO L195 NwaCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:48,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 00:59:48,243 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:48,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:48,256 INFO L85 PathProgramCache]: Analyzing trace with hash 233084109, now seen corresponding path program 1 times [2023-11-12 00:59:48,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:48,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163095393] [2023-11-12 00:59:48,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:48,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:48,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:49,355 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-12 00:59:49,356 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:49,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163095393] [2023-11-12 00:59:49,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163095393] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:49,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:49,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-12 00:59:49,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848108605] [2023-11-12 00:59:49,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:49,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 00:59:49,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:49,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 00:59:49,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-12 00:59:49,360 INFO L87 Difference]: Start difference. First operand 108 states and 131 transitions. Second operand has 9 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 3 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) [2023-11-12 00:59:49,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:49,581 INFO L93 Difference]: Finished difference Result 152 states and 183 transitions. [2023-11-12 00:59:49,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 00:59:49,583 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 3 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) Word has length 93 [2023-11-12 00:59:49,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:49,586 INFO L225 Difference]: With dead ends: 152 [2023-11-12 00:59:49,587 INFO L226 Difference]: Without dead ends: 102 [2023-11-12 00:59:49,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-11-12 00:59:49,591 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 1 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:49,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 856 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:59:49,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-11-12 00:59:49,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2023-11-12 00:59:49,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 54 states have (on average 1.0925925925925926) internal successors, (59), 55 states have internal predecessors, (59), 32 states have call successors, (32), 15 states have call predecessors, (32), 15 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-11-12 00:59:49,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 122 transitions. [2023-11-12 00:59:49,613 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 122 transitions. Word has length 93 [2023-11-12 00:59:49,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:49,615 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 122 transitions. [2023-11-12 00:59:49,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 3 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) [2023-11-12 00:59:49,617 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 122 transitions. [2023-11-12 00:59:49,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-11-12 00:59:49,622 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:49,622 INFO L195 NwaCegarLoop]: trace histogram [9, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:49,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 00:59:49,622 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:49,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:49,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1284520956, now seen corresponding path program 1 times [2023-11-12 00:59:49,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:49,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938645648] [2023-11-12 00:59:49,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:49,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:50,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:53,430 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-11-12 00:59:53,430 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:53,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938645648] [2023-11-12 00:59:53,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938645648] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:53,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:53,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-11-12 00:59:53,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686816262] [2023-11-12 00:59:53,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:53,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-12 00:59:53,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:53,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-12 00:59:53,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2023-11-12 00:59:53,433 INFO L87 Difference]: Start difference. First operand 102 states and 122 transitions. Second operand has 17 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 16 states have internal predecessors, (43), 8 states have call successors, (24), 2 states have call predecessors, (24), 7 states have return successors, (22), 10 states have call predecessors, (22), 8 states have call successors, (22) [2023-11-12 00:59:55,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:55,207 INFO L93 Difference]: Finished difference Result 156 states and 191 transitions. [2023-11-12 00:59:55,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-12 00:59:55,208 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 16 states have internal predecessors, (43), 8 states have call successors, (24), 2 states have call predecessors, (24), 7 states have return successors, (22), 10 states have call predecessors, (22), 8 states have call successors, (22) Word has length 97 [2023-11-12 00:59:55,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:55,210 INFO L225 Difference]: With dead ends: 156 [2023-11-12 00:59:55,210 INFO L226 Difference]: Without dead ends: 119 [2023-11-12 00:59:55,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2023-11-12 00:59:55,212 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 16 mSDsluCounter, 1233 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 1327 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:55,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 1327 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-12 00:59:55,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-11-12 00:59:55,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 113. [2023-11-12 00:59:55,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 61 states have (on average 1.098360655737705) internal successors, (67), 64 states have internal predecessors, (67), 34 states have call successors, (34), 15 states have call predecessors, (34), 17 states have return successors, (35), 33 states have call predecessors, (35), 33 states have call successors, (35) [2023-11-12 00:59:55,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 136 transitions. [2023-11-12 00:59:55,227 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 136 transitions. Word has length 97 [2023-11-12 00:59:55,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:55,228 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 136 transitions. [2023-11-12 00:59:55,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 16 states have internal predecessors, (43), 8 states have call successors, (24), 2 states have call predecessors, (24), 7 states have return successors, (22), 10 states have call predecessors, (22), 8 states have call successors, (22) [2023-11-12 00:59:55,229 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 136 transitions. [2023-11-12 00:59:55,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-11-12 00:59:55,230 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:55,230 INFO L195 NwaCegarLoop]: trace histogram [9, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:55,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 00:59:55,231 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:55,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:55,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1324783671, now seen corresponding path program 1 times [2023-11-12 00:59:55,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:55,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703181736] [2023-11-12 00:59:55,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:55,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:55,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:55,730 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-12 00:59:55,730 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:55,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703181736] [2023-11-12 00:59:55,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703181736] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:55,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:55,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 00:59:55,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721322135] [2023-11-12 00:59:55,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:55,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:59:55,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:55,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:59:55,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:59:55,735 INFO L87 Difference]: Start difference. First operand 113 states and 136 transitions. Second operand has 7 states, 5 states have (on average 8.4) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-12 00:59:55,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:55,906 INFO L93 Difference]: Finished difference Result 184 states and 216 transitions. [2023-11-12 00:59:55,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 00:59:55,907 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 8.4) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) Word has length 101 [2023-11-12 00:59:55,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:55,909 INFO L225 Difference]: With dead ends: 184 [2023-11-12 00:59:55,909 INFO L226 Difference]: Without dead ends: 99 [2023-11-12 00:59:55,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:59:55,912 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 1 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:55,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 629 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:59:55,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-11-12 00:59:55,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2023-11-12 00:59:55,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 54 states have internal predecessors, (57), 31 states have call successors, (31), 14 states have call predecessors, (31), 14 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-12 00:59:55,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 118 transitions. [2023-11-12 00:59:55,929 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 118 transitions. Word has length 101 [2023-11-12 00:59:55,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:55,930 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 118 transitions. [2023-11-12 00:59:55,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 8.4) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-12 00:59:55,930 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 118 transitions. [2023-11-12 00:59:55,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-11-12 00:59:55,933 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:55,933 INFO L195 NwaCegarLoop]: trace histogram [9, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:55,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 00:59:55,933 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:55,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:55,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1939080314, now seen corresponding path program 1 times [2023-11-12 00:59:55,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:55,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877046723] [2023-11-12 00:59:55,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:55,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:56,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:56,819 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-12 00:59:56,819 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:56,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877046723] [2023-11-12 00:59:56,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877046723] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:59:56,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291621031] [2023-11-12 00:59:56,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:56,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:56,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22719245-8007-4026-ac90-7e29eb21912e/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:59:56,839 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22719245-8007-4026-ac90-7e29eb21912e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:59:56,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22719245-8007-4026-ac90-7e29eb21912e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:59:57,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:57,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 2875 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 00:59:57,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:59:57,634 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-12 00:59:57,635 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:59:57,785 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-12 00:59:57,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291621031] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 00:59:57,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:59:57,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2023-11-12 00:59:57,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390669223] [2023-11-12 00:59:57,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:57,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:59:57,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:57,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:59:57,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:59:57,788 INFO L87 Difference]: Start difference. First operand 99 states and 118 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-12 00:59:58,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:58,149 INFO L93 Difference]: Finished difference Result 136 states and 162 transitions. [2023-11-12 00:59:58,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:59:58,152 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 98 [2023-11-12 00:59:58,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:58,153 INFO L225 Difference]: With dead ends: 136 [2023-11-12 00:59:58,153 INFO L226 Difference]: Without dead ends: 100 [2023-11-12 00:59:58,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 193 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:59:58,154 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 3 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:58,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 293 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 00:59:58,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-11-12 00:59:58,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2023-11-12 00:59:58,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 55 states have internal predecessors, (58), 31 states have call successors, (31), 14 states have call predecessors, (31), 14 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-12 00:59:58,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 119 transitions. [2023-11-12 00:59:58,172 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 119 transitions. Word has length 98 [2023-11-12 00:59:58,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:58,174 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 119 transitions. [2023-11-12 00:59:58,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-12 00:59:58,174 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 119 transitions. [2023-11-12 00:59:58,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-11-12 00:59:58,176 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:58,176 INFO L195 NwaCegarLoop]: trace histogram [9, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:58,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22719245-8007-4026-ac90-7e29eb21912e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:59:58,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22719245-8007-4026-ac90-7e29eb21912e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-12 00:59:58,380 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:58,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:58,381 INFO L85 PathProgramCache]: Analyzing trace with hash 904710662, now seen corresponding path program 1 times [2023-11-12 00:59:58,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:58,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802558514] [2023-11-12 00:59:58,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:58,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:58,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:03,281 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-11-12 01:00:03,281 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:03,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802558514] [2023-11-12 01:00:03,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802558514] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:00:03,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93605247] [2023-11-12 01:00:03,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:03,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:03,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22719245-8007-4026-ac90-7e29eb21912e/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:00:03,283 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22719245-8007-4026-ac90-7e29eb21912e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:00:03,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22719245-8007-4026-ac90-7e29eb21912e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 01:00:04,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:04,376 INFO L262 TraceCheckSpWp]: Trace formula consists of 2898 conjuncts, 116 conjunts are in the unsatisfiable core [2023-11-12 01:00:04,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:00:05,303 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-12 01:00:05,759 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-12 01:00:05,855 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-11-12 01:00:07,313 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-12 01:00:07,313 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:00:10,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93605247] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:00:10,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [577238440] [2023-11-12 01:00:10,748 INFO L159 IcfgInterpreter]: Started Sifa with 76 locations of interest [2023-11-12 01:00:10,748 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:00:10,753 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:00:10,758 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:00:10,758 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs