./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_string_eq_byte_cursor_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15e14fa-afd3-464a-97b8-1f433d85621c/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15e14fa-afd3-464a-97b8-1f433d85621c/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15e14fa-afd3-464a-97b8-1f433d85621c/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15e14fa-afd3-464a-97b8-1f433d85621c/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_string_eq_byte_cursor_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15e14fa-afd3-464a-97b8-1f433d85621c/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15e14fa-afd3-464a-97b8-1f433d85621c/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --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 caa9ea3c4b01be424b9d4542ff8acdcb39307db8022d65ba85a629a6a4ef591a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:18:21,016 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:18:21,019 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:18:21,088 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:18:21,089 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:18:21,095 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:18:21,098 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:18:21,103 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:18:21,107 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:18:21,116 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:18:21,118 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:18:21,121 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:18:21,121 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:18:21,126 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:18:21,129 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:18:21,137 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:18:21,141 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:18:21,142 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:18:21,147 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:18:21,153 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:18:21,159 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:18:21,161 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:18:21,165 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:18:21,166 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:18:21,175 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:18:21,175 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:18:21,176 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:18:21,178 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:18:21,179 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:18:21,181 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:18:21,183 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:18:21,185 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:18:21,187 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:18:21,189 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:18:21,191 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:18:21,191 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:18:21,192 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:18:21,193 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:18:21,193 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:18:21,195 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:18:21,196 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:18:21,199 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15e14fa-afd3-464a-97b8-1f433d85621c/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 03:18:21,262 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:18:21,263 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:18:21,271 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:18:21,271 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:18:21,273 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:18:21,273 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:18:21,273 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:18:21,274 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:18:21,274 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:18:21,274 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:18:21,276 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:18:21,276 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:18:21,276 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:18:21,276 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:18:21,277 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:18:21,277 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:18:21,277 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:18:21,278 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:18:21,279 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:18:21,279 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:18:21,279 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:18:21,279 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:18:21,280 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:18:21,280 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:18:21,280 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:18:21,281 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:18:21,281 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:18:21,281 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:18:21,281 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:18:21,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:18:21,282 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:18:21,283 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:18:21,283 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:18:21,283 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:18:21,284 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:18:21,284 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:18:21,284 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:18:21,284 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:18:21,285 INFO L138 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_f15e14fa-afd3-464a-97b8-1f433d85621c/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15e14fa-afd3-464a-97b8-1f433d85621c/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> caa9ea3c4b01be424b9d4542ff8acdcb39307db8022d65ba85a629a6a4ef591a [2021-11-23 03:18:21,667 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:18:21,693 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:18:21,697 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:18:21,699 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:18:21,700 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:18:21,702 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15e14fa-afd3-464a-97b8-1f433d85621c/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/aws-c-common/aws_string_eq_byte_cursor_harness.i [2021-11-23 03:18:21,804 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15e14fa-afd3-464a-97b8-1f433d85621c/bin/utaipan-EQgc7hIp5V/data/540f90058/c5b5ca56258a4b06b306123134491980/FLAGd628616d3 [2021-11-23 03:18:22,907 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:18:22,909 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15e14fa-afd3-464a-97b8-1f433d85621c/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_cursor_harness.i [2021-11-23 03:18:22,969 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15e14fa-afd3-464a-97b8-1f433d85621c/bin/utaipan-EQgc7hIp5V/data/540f90058/c5b5ca56258a4b06b306123134491980/FLAGd628616d3 [2021-11-23 03:18:23,254 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15e14fa-afd3-464a-97b8-1f433d85621c/bin/utaipan-EQgc7hIp5V/data/540f90058/c5b5ca56258a4b06b306123134491980 [2021-11-23 03:18:23,258 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:18:23,260 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:18:23,263 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:18:23,263 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:18:23,268 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:18:23,269 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:18:23" (1/1) ... [2021-11-23 03:18:23,271 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d867e3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:18:23, skipping insertion in model container [2021-11-23 03:18:23,272 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:18:23" (1/1) ... [2021-11-23 03:18:23,281 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:18:23,442 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:18:23,793 WARN L230 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_f15e14fa-afd3-464a-97b8-1f433d85621c/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_cursor_harness.i[4499,4512] [2021-11-23 03:18:23,804 WARN L230 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_f15e14fa-afd3-464a-97b8-1f433d85621c/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_cursor_harness.i[4559,4572] [2021-11-23 03:18:25,301 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:18:25,303 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:18:25,307 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:18:25,309 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:18:25,311 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:18:25,345 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:18:25,346 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:18:25,353 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:18:25,355 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:18:25,933 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-23 03:18:25,935 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-23 03:18:25,936 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-23 03:18:25,938 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-23 03:18:25,940 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-23 03:18:25,941 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-23 03:18:25,942 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-23 03:18:25,947 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-23 03:18:25,949 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-23 03:18:25,953 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-23 03:18:26,232 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-23 03:18:26,444 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:18:26,455 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:18:26,612 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:18:26,692 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:18:26,710 WARN L230 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_f15e14fa-afd3-464a-97b8-1f433d85621c/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_cursor_harness.i[4499,4512] [2021-11-23 03:18:26,712 WARN L230 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_f15e14fa-afd3-464a-97b8-1f433d85621c/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_cursor_harness.i[4559,4572] [2021-11-23 03:18:26,762 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:18:26,766 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:18:26,767 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:18:26,768 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:18:26,769 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:18:26,781 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:18:26,785 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:18:26,788 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:18:26,788 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:18:26,887 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-23 03:18:26,889 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-23 03:18:26,891 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-23 03:18:26,892 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-23 03:18:26,894 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-23 03:18:26,895 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-23 03:18:26,898 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-23 03:18:26,899 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-23 03:18:26,899 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-23 03:18:26,900 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-23 03:18:26,947 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-23 03:18:27,073 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:18:27,074 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:18:27,191 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:18:27,667 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:18:27,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:18:27 WrapperNode [2021-11-23 03:18:27,668 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:18:27,670 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:18:27,670 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:18:27,670 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:18:27,681 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:18:27" (1/1) ... [2021-11-23 03:18:27,845 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:18:27" (1/1) ... [2021-11-23 03:18:27,991 INFO L137 Inliner]: procedures = 693, calls = 2789, calls flagged for inlining = 60, calls inlined = 7, statements flattened = 869 [2021-11-23 03:18:27,994 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:18:27,995 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:18:27,996 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:18:27,996 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:18:28,007 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:18:27" (1/1) ... [2021-11-23 03:18:28,007 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:18:27" (1/1) ... [2021-11-23 03:18:28,024 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:18:27" (1/1) ... [2021-11-23 03:18:28,025 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:18:27" (1/1) ... [2021-11-23 03:18:28,139 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:18:27" (1/1) ... [2021-11-23 03:18:28,158 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:18:27" (1/1) ... [2021-11-23 03:18:28,167 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:18:27" (1/1) ... [2021-11-23 03:18:28,192 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:18:28,199 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:18:28,199 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:18:28,199 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:18:28,200 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:18:27" (1/1) ... [2021-11-23 03:18:28,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:18:28,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15e14fa-afd3-464a-97b8-1f433d85621c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:18:28,246 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15e14fa-afd3-464a-97b8-1f433d85621c/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:18:28,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15e14fa-afd3-464a-97b8-1f433d85621c/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:18:28,289 INFO L130 BoogieDeclarations]: Found specification of procedure aws_string_is_valid [2021-11-23 03:18:28,290 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_string_is_valid [2021-11-23 03:18:28,291 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2021-11-23 03:18:28,292 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2021-11-23 03:18:28,293 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_string_is_allocated_bounded_length [2021-11-23 03:18:28,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_string_is_allocated_bounded_length [2021-11-23 03:18:28,293 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-23 03:18:28,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 03:18:28,295 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-23 03:18:28,295 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-23 03:18:28,295 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 03:18:28,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-23 03:18:28,296 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-23 03:18:28,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 03:18:28,297 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:18:28,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 03:18:28,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:18:28,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:18:28,298 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-23 03:18:28,298 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-23 03:18:28,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-23 03:18:28,301 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-23 03:18:28,301 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-23 03:18:28,301 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 03:18:28,302 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 03:18:28,302 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_eq [2021-11-23 03:18:28,302 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_eq [2021-11-23 03:18:28,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 03:18:28,303 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-23 03:18:28,303 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-23 03:18:28,303 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-23 03:18:28,303 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-23 03:18:28,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 03:18:28,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:18:28,738 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:18:28,741 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:18:30,983 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:18:31,253 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:18:31,254 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 03:18:31,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:18:31 BoogieIcfgContainer [2021-11-23 03:18:31,258 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:18:31,260 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:18:31,260 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:18:31,264 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:18:31,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:18:23" (1/3) ... [2021-11-23 03:18:31,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51cead24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:18:31, skipping insertion in model container [2021-11-23 03:18:31,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:18:27" (2/3) ... [2021-11-23 03:18:31,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51cead24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:18:31, skipping insertion in model container [2021-11-23 03:18:31,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:18:31" (3/3) ... [2021-11-23 03:18:31,272 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_string_eq_byte_cursor_harness.i [2021-11-23 03:18:31,279 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:18:31,279 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:18:31,366 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:18:31,386 INFO L339 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=LoopsAndPotentialCycles, 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 03:18:31,392 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:18:31,417 INFO L276 IsEmpty]: Start isEmpty. Operand has 92 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 52 states have internal predecessors, (64), 29 states have call successors, (29), 10 states have call predecessors, (29), 10 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-11-23 03:18:31,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-23 03:18:31,430 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:18:31,431 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:18:31,433 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:18:31,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:18:31,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1141148069, now seen corresponding path program 1 times [2021-11-23 03:18:31,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:18:31,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939014573] [2021-11-23 03:18:31,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:18:31,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:18:32,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:18:32,395 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 03:18:32,396 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:18:32,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939014573] [2021-11-23 03:18:32,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939014573] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:18:32,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:18:32,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:18:32,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404831046] [2021-11-23 03:18:32,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:18:32,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:18:32,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:18:32,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:18:32,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:18:32,458 INFO L87 Difference]: Start difference. First operand has 92 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 52 states have internal predecessors, (64), 29 states have call successors, (29), 10 states have call predecessors, (29), 10 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-23 03:18:32,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:18:32,758 INFO L93 Difference]: Finished difference Result 157 states and 217 transitions. [2021-11-23 03:18:32,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:18:32,761 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 42 [2021-11-23 03:18:32,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:18:32,785 INFO L225 Difference]: With dead ends: 157 [2021-11-23 03:18:32,785 INFO L226 Difference]: Without dead ends: 119 [2021-11-23 03:18:32,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:18:32,802 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 12 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:18:32,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 336 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:18:32,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-23 03:18:32,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2021-11-23 03:18:32,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 67 states have (on average 1.2537313432835822) internal successors, (84), 68 states have internal predecessors, (84), 39 states have call successors, (39), 10 states have call predecessors, (39), 10 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2021-11-23 03:18:32,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 161 transitions. [2021-11-23 03:18:32,920 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 161 transitions. Word has length 42 [2021-11-23 03:18:32,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:18:32,921 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 161 transitions. [2021-11-23 03:18:32,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-23 03:18:32,922 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 161 transitions. [2021-11-23 03:18:32,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-23 03:18:32,928 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:18:32,928 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:18:32,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:18:32,929 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:18:32,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:18:32,931 INFO L85 PathProgramCache]: Analyzing trace with hash -2093931912, now seen corresponding path program 1 times [2021-11-23 03:18:32,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:18:32,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851908535] [2021-11-23 03:18:32,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:18:32,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:18:33,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:18:34,319 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 03:18:34,319 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:18:34,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851908535] [2021-11-23 03:18:34,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851908535] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:18:34,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927658105] [2021-11-23 03:18:34,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:18:34,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:18:34,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15e14fa-afd3-464a-97b8-1f433d85621c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:18:34,332 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15e14fa-afd3-464a-97b8-1f433d85621c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:18:34,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15e14fa-afd3-464a-97b8-1f433d85621c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:18:35,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:18:35,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 2442 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-23 03:18:35,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:18:35,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2021-11-23 03:18:35,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2021-11-23 03:18:41,468 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:18:41,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:18:42,872 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 14202 disjunctions. This might take some time... [2021-11-23 03:19:15,584 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 13413 disjunctions.