./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_hash_array_ignore_case_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_bf88d94e-5608-4e7a-8c22-e7e548bdc55e/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf88d94e-5608-4e7a-8c22-e7e548bdc55e/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf88d94e-5608-4e7a-8c22-e7e548bdc55e/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf88d94e-5608-4e7a-8c22-e7e548bdc55e/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_hash_array_ignore_case_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf88d94e-5608-4e7a-8c22-e7e548bdc55e/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf88d94e-5608-4e7a-8c22-e7e548bdc55e/bin/utaipan-verify-SwPr7d2a91 --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 a5cc7d054134727d17d186899e752bcb9b04f811a63c25a6e1e851147ab3514d --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:58:19,990 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:58:20,107 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf88d94e-5608-4e7a-8c22-e7e548bdc55e/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-24 23:58:20,113 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:58:20,114 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:58:20,143 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:58:20,144 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:58:20,145 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:58:20,146 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:58:20,151 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:58:20,152 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:58:20,153 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:58:20,153 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:58:20,155 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:58:20,155 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:58:20,156 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:58:20,156 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:58:20,157 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:58:20,157 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:58:20,158 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:58:20,158 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:58:20,159 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:58:20,160 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:58:20,161 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:58:20,161 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:58:20,161 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:58:20,162 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:58:20,162 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:58:20,163 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:58:20,163 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:58:20,164 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:58:20,165 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:58:20,165 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:58:20,165 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:58:20,166 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:58:20,166 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:58:20,166 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:58:20,166 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:58:20,167 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:58:20,167 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:58:20,167 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:58:20,168 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:58:20,168 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:58:20,168 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:58:20,169 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_bf88d94e-5608-4e7a-8c22-e7e548bdc55e/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf88d94e-5608-4e7a-8c22-e7e548bdc55e/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a5cc7d054134727d17d186899e752bcb9b04f811a63c25a6e1e851147ab3514d [2023-11-24 23:58:20,471 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:58:20,506 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:58:20,509 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:58:20,510 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:58:20,511 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:58:20,512 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf88d94e-5608-4e7a-8c22-e7e548bdc55e/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/aws-c-common/aws_hash_array_ignore_case_harness.i [2023-11-24 23:58:23,602 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:58:24,237 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:58:24,238 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf88d94e-5608-4e7a-8c22-e7e548bdc55e/sv-benchmarks/c/aws-c-common/aws_hash_array_ignore_case_harness.i [2023-11-24 23:58:24,281 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf88d94e-5608-4e7a-8c22-e7e548bdc55e/bin/utaipan-verify-SwPr7d2a91/data/7509b2137/f58db8d6db424a9997e3491e4fded587/FLAG09be6d11d [2023-11-24 23:58:24,299 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf88d94e-5608-4e7a-8c22-e7e548bdc55e/bin/utaipan-verify-SwPr7d2a91/data/7509b2137/f58db8d6db424a9997e3491e4fded587 [2023-11-24 23:58:24,306 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:58:24,308 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:58:24,311 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:58:24,311 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:58:24,317 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:58:24,318 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:58:24" (1/1) ... [2023-11-24 23:58:24,319 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33b6dab2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:58:24, skipping insertion in model container [2023-11-24 23:58:24,319 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:58:24" (1/1) ... [2023-11-24 23:58:24,495 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:58:24,775 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_bf88d94e-5608-4e7a-8c22-e7e548bdc55e/sv-benchmarks/c/aws-c-common/aws_hash_array_ignore_case_harness.i[4500,4513] [2023-11-24 23:58:24,784 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_bf88d94e-5608-4e7a-8c22-e7e548bdc55e/sv-benchmarks/c/aws-c-common/aws_hash_array_ignore_case_harness.i[4560,4573] [2023-11-24 23:58:25,887 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:58:25,888 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:58:25,889 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:58:25,890 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:58:25,891 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:58:25,908 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:58:25,909 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:58:25,911 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:58:25,912 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:58:26,338 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-24 23:58:26,340 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-24 23:58:26,341 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-24 23:58:26,343 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-24 23:58:26,345 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-24 23:58:26,346 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-24 23:58:26,346 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-24 23:58:26,347 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-24 23:58:26,348 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-24 23:58:26,349 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-24 23:58:26,684 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:58:26,685 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:58:26,805 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:58:26,890 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:58:26,917 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_bf88d94e-5608-4e7a-8c22-e7e548bdc55e/sv-benchmarks/c/aws-c-common/aws_hash_array_ignore_case_harness.i[4500,4513] [2023-11-24 23:58:26,918 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_bf88d94e-5608-4e7a-8c22-e7e548bdc55e/sv-benchmarks/c/aws-c-common/aws_hash_array_ignore_case_harness.i[4560,4573] [2023-11-24 23:58:26,975 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:58:26,976 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:58:26,977 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:58:26,978 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:58:26,979 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:58:26,996 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:58:26,997 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:58:26,998 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:58:26,999 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:58:27,068 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-24 23:58:27,069 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-24 23:58:27,070 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-24 23:58:27,071 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-24 23:58:27,072 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-24 23:58:27,072 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-24 23:58:27,073 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-24 23:58:27,073 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-24 23:58:27,074 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-24 23:58:27,074 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-24 23:58:27,194 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : "+r"(index)); [8269] [2023-11-24 23:58:27,196 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:58:27,197 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:58:27,211 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [8755-8766] [2023-11-24 23:58:27,243 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:58:27,504 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:58:27,505 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:58:27,505 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:58:27,505 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:58:27,505 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:58:27,505 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:58:27,506 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:58:27,506 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:58:27,506 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:58:27,506 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:58:27,506 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:58:27,507 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:58:27,507 WARN L675 CHandler]: The function predicate is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:58:27,507 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:58:27,507 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:58:27,507 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:58:27,507 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:58:27,508 WARN L675 CHandler]: The function memchr is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:58:27,536 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:58:27,537 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:58:27 WrapperNode [2023-11-24 23:58:27,537 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:58:27,538 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:58:27,539 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:58:27,539 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:58:27,547 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:58:27" (1/1) ... [2023-11-24 23:58:27,727 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:58:27" (1/1) ... [2023-11-24 23:58:27,816 INFO L138 Inliner]: procedures = 689, calls = 2603, calls flagged for inlining = 56, calls inlined = 3, statements flattened = 726 [2023-11-24 23:58:27,817 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:58:27,818 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:58:27,818 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:58:27,819 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:58:27,832 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:58:27" (1/1) ... [2023-11-24 23:58:27,832 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:58:27" (1/1) ... [2023-11-24 23:58:27,846 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:58:27" (1/1) ... [2023-11-24 23:58:27,847 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:58:27" (1/1) ... [2023-11-24 23:58:27,901 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:58:27" (1/1) ... [2023-11-24 23:58:27,921 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:58:27" (1/1) ... [2023-11-24 23:58:27,928 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:58:27" (1/1) ... [2023-11-24 23:58:27,945 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:58:27" (1/1) ... [2023-11-24 23:58:27,955 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:58:27,956 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:58:27,963 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:58:27,963 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:58:27,964 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:58:27" (1/1) ... [2023-11-24 23:58:27,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:58:27,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf88d94e-5608-4e7a-8c22-e7e548bdc55e/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:58:27,996 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf88d94e-5608-4e7a-8c22-e7e548bdc55e/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:58:28,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf88d94e-5608-4e7a-8c22-e7e548bdc55e/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:58:28,040 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-24 23:58:28,040 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-24 23:58:28,040 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-24 23:58:28,040 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-24 23:58:28,040 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-24 23:58:28,041 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 23:58:28,041 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:58:28,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:58:28,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:58:28,042 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_array_ignore_case [2023-11-24 23:58:28,042 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_array_ignore_case [2023-11-24 23:58:28,042 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-24 23:58:28,043 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-24 23:58:28,043 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2023-11-24 23:58:28,043 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2023-11-24 23:58:28,043 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-24 23:58:28,043 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-24 23:58:28,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-24 23:58:28,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:58:28,329 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:58:28,332 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:58:29,615 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:58:29,820 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:58:29,820 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-24 23:58:29,822 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:58:29 BoogieIcfgContainer [2023-11-24 23:58:29,822 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:58:29,828 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:58:29,828 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:58:29,832 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:58:29,832 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:58:24" (1/3) ... [2023-11-24 23:58:29,834 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22ba7bdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:58:29, skipping insertion in model container [2023-11-24 23:58:29,834 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:58:27" (2/3) ... [2023-11-24 23:58:29,835 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22ba7bdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:58:29, skipping insertion in model container [2023-11-24 23:58:29,835 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:58:29" (3/3) ... [2023-11-24 23:58:29,839 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_hash_array_ignore_case_harness.i [2023-11-24 23:58:29,860 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:58:29,860 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 23:58:29,921 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:58:29,933 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;@30f621fa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:58:29,933 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 23:58:29,938 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-24 23:58:29,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-24 23:58:29,947 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:58:29,947 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:58:29,948 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:58:29,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:58:29,954 INFO L85 PathProgramCache]: Analyzing trace with hash -906855438, now seen corresponding path program 1 times [2023-11-24 23:58:29,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:58:29,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802412794] [2023-11-24 23:58:29,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:58:29,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:58:30,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:58:32,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 23:58:32,361 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:58:32,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802412794] [2023-11-24 23:58:32,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802412794] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:58:32,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:58:32,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-24 23:58:32,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868422414] [2023-11-24 23:58:32,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:58:32,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 23:58:32,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:58:32,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 23:58:32,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-24 23:58:32,409 INFO L87 Difference]: Start difference. First operand has 36 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-24 23:58:32,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:58:32,711 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2023-11-24 23:58:32,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 23:58:32,715 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 29 [2023-11-24 23:58:32,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:58:32,724 INFO L225 Difference]: With dead ends: 51 [2023-11-24 23:58:32,724 INFO L226 Difference]: Without dead ends: 33 [2023-11-24 23:58:32,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-11-24 23:58:32,733 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 10 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:58:32,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 156 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:58:32,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-11-24 23:58:32,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-11-24 23:58:32,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-24 23:58:32,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2023-11-24 23:58:32,777 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 29 [2023-11-24 23:58:32,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:58:32,779 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2023-11-24 23:58:32,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-24 23:58:32,780 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2023-11-24 23:58:32,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-24 23:58:32,782 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:58:32,782 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:58:32,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 23:58:32,782 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:58:32,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:58:32,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1446227823, now seen corresponding path program 1 times [2023-11-24 23:58:32,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:58:32,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884268115] [2023-11-24 23:58:32,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:58:32,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:58:32,874 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:58:32,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [405674642] [2023-11-24 23:58:32,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:58:32,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:58:32,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf88d94e-5608-4e7a-8c22-e7e548bdc55e/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:58:32,880 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf88d94e-5608-4e7a-8c22-e7e548bdc55e/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:58:32,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf88d94e-5608-4e7a-8c22-e7e548bdc55e/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 23:58:33,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:58:33,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 2325 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-24 23:58:33,430 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:58:33,640 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-24 23:58:33,641 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:58:33,796 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-24 23:58:33,796 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:58:33,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884268115] [2023-11-24 23:58:33,797 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:58:33,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405674642] [2023-11-24 23:58:33,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405674642] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:58:33,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [981809366] [2023-11-24 23:58:33,844 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-11-24 23:58:33,844 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:58:33,848 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:58:33,855 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:58:33,855 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs