./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_string_destroy_secure_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f516136-4cab-4765-b4b2-f6a80fd8cff9/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f516136-4cab-4765-b4b2-f6a80fd8cff9/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_9f516136-4cab-4765-b4b2-f6a80fd8cff9/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f516136-4cab-4765-b4b2-f6a80fd8cff9/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_string_destroy_secure_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f516136-4cab-4765-b4b2-f6a80fd8cff9/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_9f516136-4cab-4765-b4b2-f6a80fd8cff9/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 bc5ed5fb850d9a2c9d9a14514ffc7939afe81a277edfb59aefd3c5f66024eda8 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:48:03,007 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:48:03,081 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f516136-4cab-4765-b4b2-f6a80fd8cff9/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-12 00:48:03,087 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:48:03,088 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:48:03,119 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:48:03,120 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:48:03,120 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:48:03,121 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:48:03,122 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:48:03,123 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:48:03,123 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:48:03,124 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:48:03,124 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:48:03,125 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:48:03,126 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:48:03,126 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:48:03,127 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:48:03,127 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:48:03,128 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:48:03,129 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:48:03,129 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:48:03,130 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:48:03,131 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:48:03,132 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:48:03,132 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:48:03,133 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:48:03,133 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:48:03,134 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:48:03,134 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:48:03,135 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:48:03,135 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:48:03,136 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:48:03,136 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:48:03,136 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:48:03,137 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:48:03,137 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:48:03,137 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:48:03,137 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:48:03,138 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:48:03,138 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:48:03,138 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:48:03,139 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_9f516136-4cab-4765-b4b2-f6a80fd8cff9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f516136-4cab-4765-b4b2-f6a80fd8cff9/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bc5ed5fb850d9a2c9d9a14514ffc7939afe81a277edfb59aefd3c5f66024eda8 [2023-11-12 00:48:03,460 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:48:03,494 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:48:03,497 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:48:03,498 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:48:03,499 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:48:03,500 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f516136-4cab-4765-b4b2-f6a80fd8cff9/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/aws-c-common/aws_string_destroy_secure_harness.i [2023-11-12 00:48:06,782 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:48:07,461 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:48:07,462 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f516136-4cab-4765-b4b2-f6a80fd8cff9/sv-benchmarks/c/aws-c-common/aws_string_destroy_secure_harness.i [2023-11-12 00:48:07,529 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f516136-4cab-4765-b4b2-f6a80fd8cff9/bin/utaipan-verify-NcY6lQBIFX/data/d079ed1bc/96ef8840eef84864878ded918be89bc5/FLAG97774fc94 [2023-11-12 00:48:07,548 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f516136-4cab-4765-b4b2-f6a80fd8cff9/bin/utaipan-verify-NcY6lQBIFX/data/d079ed1bc/96ef8840eef84864878ded918be89bc5 [2023-11-12 00:48:07,556 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:48:07,558 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:48:07,562 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:48:07,562 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:48:07,568 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:48:07,569 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:48:07" (1/1) ... [2023-11-12 00:48:07,571 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@479d3151 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:07, skipping insertion in model container [2023-11-12 00:48:07,571 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:48:07" (1/1) ... [2023-11-12 00:48:07,819 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:48:08,149 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_9f516136-4cab-4765-b4b2-f6a80fd8cff9/sv-benchmarks/c/aws-c-common/aws_string_destroy_secure_harness.i[4499,4512] [2023-11-12 00:48:08,160 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_9f516136-4cab-4765-b4b2-f6a80fd8cff9/sv-benchmarks/c/aws-c-common/aws_string_destroy_secure_harness.i[4559,4572] [2023-11-12 00:48:09,530 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:48:09,532 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:48:09,533 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:48:09,536 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:48:09,538 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:48:09,565 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:48:09,569 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:48:09,573 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:48:09,575 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:48:10,192 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-12 00:48:10,193 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-12 00:48:10,195 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-12 00:48:10,197 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-12 00:48:10,199 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-12 00:48:10,200 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-12 00:48:10,201 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-12 00:48:10,202 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-12 00:48:10,203 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-12 00:48:10,204 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-12 00:48:10,569 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:48:10,570 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:48:10,704 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:48:10,784 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:48:10,856 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_9f516136-4cab-4765-b4b2-f6a80fd8cff9/sv-benchmarks/c/aws-c-common/aws_string_destroy_secure_harness.i[4499,4512] [2023-11-12 00:48:10,857 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_9f516136-4cab-4765-b4b2-f6a80fd8cff9/sv-benchmarks/c/aws-c-common/aws_string_destroy_secure_harness.i[4559,4572] [2023-11-12 00:48:10,911 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:48:10,912 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:48:10,912 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:48:10,913 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:48:10,914 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:48:10,920 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:48:10,920 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:48:10,922 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:48:10,922 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:48:10,959 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-12 00:48:10,960 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-12 00:48:10,961 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-12 00:48:10,962 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-12 00:48:10,963 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-12 00:48:10,963 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-12 00:48:10,964 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-12 00:48:10,964 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-12 00:48:10,965 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-12 00:48:10,965 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-12 00:48:11,037 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : "+r"(index)); [8253] [2023-11-12 00:48:11,039 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:48:11,039 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:48:11,053 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [8739-8750] [2023-11-12 00:48:11,081 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:48:11,316 WARN L672 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:48:11,317 WARN L672 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:48:11,317 WARN L672 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:48:11,317 WARN L672 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:48:11,317 WARN L672 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:48:11,318 WARN L672 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:48:11,318 WARN L672 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:48:11,318 WARN L672 CHandler]: The function s_global_handler is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:48:11,318 WARN L672 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:48:11,318 WARN L672 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:48:11,319 WARN L672 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:48:11,319 WARN L672 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:48:11,319 WARN L672 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:48:11,319 WARN L672 CHandler]: The function predicate is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:48:11,319 WARN L672 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:48:11,319 WARN L672 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:48:11,320 WARN L672 CHandler]: The function tl_thread_handler is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:48:11,320 WARN L672 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:48:11,320 WARN L672 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:48:11,320 WARN L672 CHandler]: The function memchr is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:48:11,328 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:48:11,329 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:11 WrapperNode [2023-11-12 00:48:11,329 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:48:11,330 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:48:11,330 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:48:11,330 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:48:11,338 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:11" (1/1) ... [2023-11-12 00:48:11,477 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:11" (1/1) ... [2023-11-12 00:48:11,593 INFO L138 Inliner]: procedures = 692, calls = 2777, calls flagged for inlining = 60, calls inlined = 8, statements flattened = 807 [2023-11-12 00:48:11,594 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:48:11,597 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:48:11,597 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:48:11,597 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:48:11,608 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:11" (1/1) ... [2023-11-12 00:48:11,609 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:11" (1/1) ... [2023-11-12 00:48:11,623 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:11" (1/1) ... [2023-11-12 00:48:11,624 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:11" (1/1) ... [2023-11-12 00:48:11,722 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:11" (1/1) ... [2023-11-12 00:48:11,727 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:11" (1/1) ... [2023-11-12 00:48:11,733 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:11" (1/1) ... [2023-11-12 00:48:11,739 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:11" (1/1) ... [2023-11-12 00:48:11,751 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:48:11,752 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:48:11,752 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:48:11,752 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:48:11,753 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:11" (1/1) ... [2023-11-12 00:48:11,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:48:11,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f516136-4cab-4765-b4b2-f6a80fd8cff9/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:48:11,811 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f516136-4cab-4765-b4b2-f6a80fd8cff9/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:48:11,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f516136-4cab-4765-b4b2-f6a80fd8cff9/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:48:11,861 INFO L130 BoogieDeclarations]: Found specification of procedure aws_string_is_valid [2023-11-12 00:48:11,861 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_string_is_valid [2023-11-12 00:48:11,861 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_string_is_allocated_bounded_length [2023-11-12 00:48:11,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_string_is_allocated_bounded_length [2023-11-12 00:48:11,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:48:11,863 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-12 00:48:11,863 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-12 00:48:11,863 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:48:11,863 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-12 00:48:11,864 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-12 00:48:11,864 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 00:48:11,864 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:48:11,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 00:48:11,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:48:11,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:48:11,865 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-12 00:48:11,865 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-12 00:48:11,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-12 00:48:11,866 INFO L130 BoogieDeclarations]: Found specification of procedure aws_secure_zero [2023-11-12 00:48:11,866 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_secure_zero [2023-11-12 00:48:11,866 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2023-11-12 00:48:11,866 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2023-11-12 00:48:11,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-12 00:48:11,867 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-12 00:48:11,868 INFO L130 BoogieDeclarations]: Found specification of procedure aws_string_bytes [2023-11-12 00:48:11,869 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_string_bytes [2023-11-12 00:48:11,869 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 00:48:11,869 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 00:48:11,869 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 00:48:11,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-12 00:48:11,870 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-11-12 00:48:11,871 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-11-12 00:48:11,871 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-11-12 00:48:11,871 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-11-12 00:48:11,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:48:11,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:48:12,211 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:48:12,214 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:48:14,149 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:48:14,423 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:48:14,424 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-12 00:48:14,427 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:48:14 BoogieIcfgContainer [2023-11-12 00:48:14,428 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:48:14,430 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:48:14,431 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:48:14,435 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:48:14,436 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:48:07" (1/3) ... [2023-11-12 00:48:14,438 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41fe2cde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:48:14, skipping insertion in model container [2023-11-12 00:48:14,438 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:11" (2/3) ... [2023-11-12 00:48:14,444 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41fe2cde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:48:14, skipping insertion in model container [2023-11-12 00:48:14,445 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:48:14" (3/3) ... [2023-11-12 00:48:14,446 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_string_destroy_secure_harness.i [2023-11-12 00:48:14,472 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:48:14,472 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:48:14,546 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:48:14,554 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;@263ceb09, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:48:14,555 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:48:14,561 INFO L276 IsEmpty]: Start isEmpty. Operand has 79 states, 45 states have (on average 1.2) internal successors, (54), 46 states have internal predecessors, (54), 20 states have call successors, (20), 12 states have call predecessors, (20), 12 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-12 00:48:14,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-12 00:48:14,576 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:14,577 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2023-11-12 00:48:14,577 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:48:14,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:14,587 INFO L85 PathProgramCache]: Analyzing trace with hash 997548418, now seen corresponding path program 1 times [2023-11-12 00:48:14,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:14,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485173078] [2023-11-12 00:48:14,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:14,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:15,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:16,784 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-12 00:48:16,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:48:16,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485173078] [2023-11-12 00:48:16,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485173078] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:48:16,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:48:16,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-12 00:48:16,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613328917] [2023-11-12 00:48:16,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:48:16,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 00:48:16,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:48:16,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 00:48:16,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-12 00:48:16,841 INFO L87 Difference]: Start difference. First operand has 79 states, 45 states have (on average 1.2) internal successors, (54), 46 states have internal predecessors, (54), 20 states have call successors, (20), 12 states have call predecessors, (20), 12 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 9 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2023-11-12 00:48:17,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:48:17,222 INFO L93 Difference]: Finished difference Result 102 states and 120 transitions. [2023-11-12 00:48:17,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 00:48:17,226 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) Word has length 47 [2023-11-12 00:48:17,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:48:17,237 INFO L225 Difference]: With dead ends: 102 [2023-11-12 00:48:17,237 INFO L226 Difference]: Without dead ends: 73 [2023-11-12 00:48:17,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-12 00:48:17,251 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 11 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:48:17,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 540 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 00:48:17,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-11-12 00:48:17,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2023-11-12 00:48:17,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 20 states have call successors, (20), 12 states have call predecessors, (20), 11 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-12 00:48:17,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 84 transitions. [2023-11-12 00:48:17,329 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 84 transitions. Word has length 47 [2023-11-12 00:48:17,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:48:17,331 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 84 transitions. [2023-11-12 00:48:17,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2023-11-12 00:48:17,332 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 84 transitions. [2023-11-12 00:48:17,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-12 00:48:17,340 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:17,341 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:48:17,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:48:17,341 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:48:17,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:17,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1091387260, now seen corresponding path program 1 times [2023-11-12 00:48:17,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:17,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254272682] [2023-11-12 00:48:17,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:17,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:17,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:18,121 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-12 00:48:18,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:48:18,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254272682] [2023-11-12 00:48:18,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254272682] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:48:18,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:48:18,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:48:18,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072273582] [2023-11-12 00:48:18,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:48:18,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:48:18,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:48:18,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:48:18,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:48:18,128 INFO L87 Difference]: Start difference. First operand 73 states and 84 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-11-12 00:48:18,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:48:18,303 INFO L93 Difference]: Finished difference Result 119 states and 135 transitions. [2023-11-12 00:48:18,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:48:18,304 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 68 [2023-11-12 00:48:18,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:48:18,307 INFO L225 Difference]: With dead ends: 119 [2023-11-12 00:48:18,307 INFO L226 Difference]: Without dead ends: 73 [2023-11-12 00:48:18,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:48:18,311 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 1 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:48:18,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 130 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:48:18,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-11-12 00:48:18,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2023-11-12 00:48:18,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 20 states have call successors, (20), 12 states have call predecessors, (20), 11 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-12 00:48:18,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2023-11-12 00:48:18,348 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 68 [2023-11-12 00:48:18,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:48:18,349 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2023-11-12 00:48:18,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-11-12 00:48:18,350 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2023-11-12 00:48:18,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-12 00:48:18,351 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:18,352 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:48:18,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:48:18,352 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:48:18,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:18,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1989250281, now seen corresponding path program 1 times [2023-11-12 00:48:18,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:18,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236640703] [2023-11-12 00:48:18,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:18,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:18,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:21,570 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-12 00:48:21,570 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:48:21,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236640703] [2023-11-12 00:48:21,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236640703] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:48:21,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785936403] [2023-11-12 00:48:21,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:21,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:48:21,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f516136-4cab-4765-b4b2-f6a80fd8cff9/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:48:21,578 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f516136-4cab-4765-b4b2-f6a80fd8cff9/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:48:21,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f516136-4cab-4765-b4b2-f6a80fd8cff9/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:48:22,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:22,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 70 conjunts are in the unsatisfiable core [2023-11-12 00:48:22,430 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:48:22,637 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-12 00:48:23,334 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:48:23,335 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 35 [2023-11-12 00:48:23,718 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-12 00:48:23,718 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:48:23,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785936403] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:48:23,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:48:23,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [10] total 24 [2023-11-12 00:48:23,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477923943] [2023-11-12 00:48:23,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:48:23,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-12 00:48:23,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:48:23,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-12 00:48:23,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=504, Unknown=0, NotChecked=0, Total=552 [2023-11-12 00:48:23,722 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 16 states, 10 states have (on average 3.7) internal successors, (37), 14 states have internal predecessors, (37), 7 states have call successors, (16), 2 states have call predecessors, (16), 6 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15) [2023-11-12 00:48:25,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:48:25,007 INFO L93 Difference]: Finished difference Result 97 states and 109 transitions. [2023-11-12 00:48:25,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-12 00:48:25,008 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 10 states have (on average 3.7) internal successors, (37), 14 states have internal predecessors, (37), 7 states have call successors, (16), 2 states have call predecessors, (16), 6 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15) Word has length 72 [2023-11-12 00:48:25,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:48:25,010 INFO L225 Difference]: With dead ends: 97 [2023-11-12 00:48:25,011 INFO L226 Difference]: Without dead ends: 74 [2023-11-12 00:48:25,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=68, Invalid=744, Unknown=0, NotChecked=0, Total=812 [2023-11-12 00:48:25,013 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 10 mSDsluCounter, 827 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:48:25,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 889 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-12 00:48:25,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-12 00:48:25,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2023-11-12 00:48:25,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 20 states have call successors, (20), 12 states have call predecessors, (20), 11 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-12 00:48:25,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2023-11-12 00:48:25,030 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 72 [2023-11-12 00:48:25,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:48:25,031 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2023-11-12 00:48:25,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 10 states have (on average 3.7) internal successors, (37), 14 states have internal predecessors, (37), 7 states have call successors, (16), 2 states have call predecessors, (16), 6 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15) [2023-11-12 00:48:25,031 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2023-11-12 00:48:25,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-12 00:48:25,033 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:25,034 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:48:25,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f516136-4cab-4765-b4b2-f6a80fd8cff9/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:48:25,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f516136-4cab-4765-b4b2-f6a80fd8cff9/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:48:25,247 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:48:25,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:25,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1888659405, now seen corresponding path program 1 times [2023-11-12 00:48:25,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:25,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345202289] [2023-11-12 00:48:25,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:25,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:25,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:28,299 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-12 00:48:28,299 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:48:28,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345202289] [2023-11-12 00:48:28,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345202289] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:48:28,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121517833] [2023-11-12 00:48:28,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:28,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:48:28,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f516136-4cab-4765-b4b2-f6a80fd8cff9/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:48:28,305 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f516136-4cab-4765-b4b2-f6a80fd8cff9/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:48:28,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f516136-4cab-4765-b4b2-f6a80fd8cff9/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:48:29,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:29,183 INFO L262 TraceCheckSpWp]: Trace formula consists of 2647 conjuncts, 185 conjunts are in the unsatisfiable core [2023-11-12 00:48:29,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:48:29,536 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 43 [2023-11-12 00:48:29,570 INFO L322 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-11-12 00:48:29,571 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 92 [2023-11-12 00:48:29,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:48:29,645 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 00:48:29,646 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 9 [2023-11-12 00:48:35,670 INFO L322 Elim1Store]: treesize reduction 53, result has 13.1 percent of original size [2023-11-12 00:48:35,670 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 45 [2023-11-12 00:48:35,985 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-12 00:48:37,732 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-12 00:48:37,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:48:38,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121517833] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:48:38,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2073515295] [2023-11-12 00:48:38,670 INFO L159 IcfgInterpreter]: Started Sifa with 61 locations of interest [2023-11-12 00:48:38,670 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:48:38,675 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:48:38,682 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:48:38,682 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs