./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_string_new_from_string_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_faa9a1bd-5526-43f2-abf1-0ceaccb57bd1/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_faa9a1bd-5526-43f2-abf1-0ceaccb57bd1/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_faa9a1bd-5526-43f2-abf1-0ceaccb57bd1/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_faa9a1bd-5526-43f2-abf1-0ceaccb57bd1/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_string_new_from_string_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_faa9a1bd-5526-43f2-abf1-0ceaccb57bd1/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_faa9a1bd-5526-43f2-abf1-0ceaccb57bd1/bin/utaipan-TEXQjIfE4P --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 618de5120235c3340e11b4958ef07a29ea7e443f67840fe760124caab804e862 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:20:42,588 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:20:42,590 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:20:42,632 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:20:42,633 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:20:42,638 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:20:42,640 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:20:42,645 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:20:42,649 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:20:42,657 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:20:42,659 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:20:42,661 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:20:42,663 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:20:42,666 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:20:42,668 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:20:42,671 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:20:42,674 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:20:42,676 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:20:42,682 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:20:42,685 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:20:42,692 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:20:42,693 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:20:42,695 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:20:42,698 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:20:42,705 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:20:42,705 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:20:42,706 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:20:42,708 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:20:42,709 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:20:42,710 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:20:42,712 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:20:42,713 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:20:42,715 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:20:42,716 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:20:42,718 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:20:42,718 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:20:42,719 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:20:42,719 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:20:42,720 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:20:42,721 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:20:42,722 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:20:42,723 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_faa9a1bd-5526-43f2-abf1-0ceaccb57bd1/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-21 01:20:42,760 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:20:42,763 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:20:42,764 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:20:42,764 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:20:42,765 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:20:42,765 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:20:42,766 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:20:42,766 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:20:42,766 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:20:42,766 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:20:42,767 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:20:42,768 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:20:42,768 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:20:42,768 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:20:42,768 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:20:42,769 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:20:42,769 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:20:42,769 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:20:42,770 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:20:42,770 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:20:42,771 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:20:42,771 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:20:42,771 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:20:42,771 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:20:42,772 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:20:42,772 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:20:42,774 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:20:42,774 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:20:42,774 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:20:42,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:20:42,774 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:20:42,775 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:20:42,775 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:20:42,775 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:20:42,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:20:42,775 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:20:42,775 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:20:42,776 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:20:42,776 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_faa9a1bd-5526-43f2-abf1-0ceaccb57bd1/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_faa9a1bd-5526-43f2-abf1-0ceaccb57bd1/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 618de5120235c3340e11b4958ef07a29ea7e443f67840fe760124caab804e862 [2021-11-21 01:20:43,046 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:20:43,090 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:20:43,093 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:20:43,094 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:20:43,095 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:20:43,097 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_faa9a1bd-5526-43f2-abf1-0ceaccb57bd1/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/aws-c-common/aws_string_new_from_string_harness.i [2021-11-21 01:20:43,166 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_faa9a1bd-5526-43f2-abf1-0ceaccb57bd1/bin/utaipan-TEXQjIfE4P/data/cafdcb4a1/3add471afd4a49b491c31ce1bc6c0afe/FLAG427df0955 [2021-11-21 01:20:44,133 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:20:44,134 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_faa9a1bd-5526-43f2-abf1-0ceaccb57bd1/sv-benchmarks/c/aws-c-common/aws_string_new_from_string_harness.i [2021-11-21 01:20:44,201 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_faa9a1bd-5526-43f2-abf1-0ceaccb57bd1/bin/utaipan-TEXQjIfE4P/data/cafdcb4a1/3add471afd4a49b491c31ce1bc6c0afe/FLAG427df0955 [2021-11-21 01:20:44,560 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_faa9a1bd-5526-43f2-abf1-0ceaccb57bd1/bin/utaipan-TEXQjIfE4P/data/cafdcb4a1/3add471afd4a49b491c31ce1bc6c0afe [2021-11-21 01:20:44,562 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:20:44,564 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:20:44,566 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:20:44,566 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:20:44,570 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:20:44,571 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:20:44" (1/1) ... [2021-11-21 01:20:44,572 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29dfbb54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:44, skipping insertion in model container [2021-11-21 01:20:44,573 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:20:44" (1/1) ... [2021-11-21 01:20:44,582 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:20:44,695 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:20:45,113 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_faa9a1bd-5526-43f2-abf1-0ceaccb57bd1/sv-benchmarks/c/aws-c-common/aws_string_new_from_string_harness.i[4500,4513] [2021-11-21 01:20:45,121 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_faa9a1bd-5526-43f2-abf1-0ceaccb57bd1/sv-benchmarks/c/aws-c-common/aws_string_new_from_string_harness.i[4560,4573] [2021-11-21 01:20:46,639 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:20:46,641 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:20:46,643 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:20:46,644 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:20:46,647 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:20:46,681 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:20:46,690 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:20:46,695 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:20:46,698 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:20:47,332 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-21 01:20:47,334 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-21 01:20:47,338 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-21 01:20:47,340 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-21 01:20:47,346 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-21 01:20:47,350 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-21 01:20:47,351 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-21 01:20:47,353 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-21 01:20:47,355 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-21 01:20:47,357 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-21 01:20:47,664 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-21 01:20:47,774 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:20:47,774 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:20:47,894 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:20:47,965 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:20:47,981 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_faa9a1bd-5526-43f2-abf1-0ceaccb57bd1/sv-benchmarks/c/aws-c-common/aws_string_new_from_string_harness.i[4500,4513] [2021-11-21 01:20:47,982 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_faa9a1bd-5526-43f2-abf1-0ceaccb57bd1/sv-benchmarks/c/aws-c-common/aws_string_new_from_string_harness.i[4560,4573] [2021-11-21 01:20:48,054 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:20:48,055 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:20:48,055 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:20:48,056 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:20:48,057 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:20:48,064 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:20:48,065 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:20:48,066 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:20:48,066 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:20:48,198 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-21 01:20:48,200 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-21 01:20:48,201 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-21 01:20:48,202 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-21 01:20:48,204 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-21 01:20:48,204 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-21 01:20:48,205 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-21 01:20:48,206 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-21 01:20:48,207 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-21 01:20:48,207 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-21 01:20:48,241 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-21 01:20:48,350 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:20:48,351 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:20:48,432 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:20:48,741 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:20:48,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:48 WrapperNode [2021-11-21 01:20:48,742 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:20:48,743 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:20:48,743 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:20:48,743 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:20:48,752 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:48" (1/1) ... [2021-11-21 01:20:48,922 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:48" (1/1) ... [2021-11-21 01:20:49,014 INFO L137 Inliner]: procedures = 690, calls = 2740, calls flagged for inlining = 59, calls inlined = 9, statements flattened = 831 [2021-11-21 01:20:49,015 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:20:49,016 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:20:49,016 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:20:49,016 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:20:49,027 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:48" (1/1) ... [2021-11-21 01:20:49,027 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:48" (1/1) ... [2021-11-21 01:20:49,050 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:48" (1/1) ... [2021-11-21 01:20:49,050 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:48" (1/1) ... [2021-11-21 01:20:49,100 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:48" (1/1) ... [2021-11-21 01:20:49,106 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:48" (1/1) ... [2021-11-21 01:20:49,114 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:48" (1/1) ... [2021-11-21 01:20:49,129 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:20:49,130 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:20:49,130 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:20:49,130 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:20:49,131 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:48" (1/1) ... [2021-11-21 01:20:49,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:20:49,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_faa9a1bd-5526-43f2-abf1-0ceaccb57bd1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:20:49,193 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_faa9a1bd-5526-43f2-abf1-0ceaccb57bd1/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:20:49,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_faa9a1bd-5526-43f2-abf1-0ceaccb57bd1/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:20:49,250 INFO L130 BoogieDeclarations]: Found specification of procedure aws_string_is_valid [2021-11-21 01:20:49,251 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_string_is_valid [2021-11-21 01:20:49,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:20:49,252 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-21 01:20:49,253 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-21 01:20:49,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~real [2021-11-21 01:20:49,254 INFO L130 BoogieDeclarations]: Found specification of procedure aws_allocator_is_valid [2021-11-21 01:20:49,255 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_allocator_is_valid [2021-11-21 01:20:49,255 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-21 01:20:49,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-21 01:20:49,256 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 01:20:49,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-21 01:20:49,257 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-21 01:20:49,257 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-11-21 01:20:49,258 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-11-21 01:20:49,258 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-21 01:20:49,258 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-21 01:20:49,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 01:20:49,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:20:49,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 01:20:49,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:20:49,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:20:49,260 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-21 01:20:49,261 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-21 01:20:49,261 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-21 01:20:49,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-21 01:20:49,262 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2021-11-21 01:20:49,263 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2021-11-21 01:20:49,263 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-21 01:20:49,263 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-21 01:20:49,263 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_acquire [2021-11-21 01:20:49,264 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_acquire [2021-11-21 01:20:49,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:20:49,264 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2021-11-21 01:20:49,264 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2021-11-21 01:20:49,264 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 01:20:49,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 01:20:49,265 INFO L130 BoogieDeclarations]: Found specification of procedure aws_string_new_from_array [2021-11-21 01:20:49,265 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_string_new_from_array [2021-11-21 01:20:49,266 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-21 01:20:49,266 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-21 01:20:49,266 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2021-11-21 01:20:49,266 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2021-11-21 01:20:49,266 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-21 01:20:49,267 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-21 01:20:49,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 01:20:49,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~real [2021-11-21 01:20:49,267 INFO L130 BoogieDeclarations]: Found specification of procedure aws_string_new_from_string [2021-11-21 01:20:49,267 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_string_new_from_string [2021-11-21 01:20:49,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:20:49,682 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:20:49,685 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:20:49,901 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##9: assume !true; [2021-11-21 01:20:51,498 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:20:51,655 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:20:51,656 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-21 01:20:51,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:20:51 BoogieIcfgContainer [2021-11-21 01:20:51,660 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:20:51,663 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:20:51,663 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:20:51,667 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:20:51,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:20:44" (1/3) ... [2021-11-21 01:20:51,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76baa9c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:20:51, skipping insertion in model container [2021-11-21 01:20:51,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:48" (2/3) ... [2021-11-21 01:20:51,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76baa9c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:20:51, skipping insertion in model container [2021-11-21 01:20:51,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:20:51" (3/3) ... [2021-11-21 01:20:51,678 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_string_new_from_string_harness.i [2021-11-21 01:20:51,686 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:20:51,687 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:20:51,772 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:20:51,792 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 [2021-11-21 01:20:51,794 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:20:51,824 INFO L276 IsEmpty]: Start isEmpty. Operand has 125 states, 69 states have (on average 1.2028985507246377) internal successors, (83), 69 states have internal predecessors, (83), 39 states have call successors, (39), 16 states have call predecessors, (39), 16 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2021-11-21 01:20:51,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-21 01:20:51,838 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:20:51,846 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:20:51,847 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:20:51,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:20:51,855 INFO L85 PathProgramCache]: Analyzing trace with hash 832461079, now seen corresponding path program 1 times [2021-11-21 01:20:51,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:20:51,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393867947] [2021-11-21 01:20:51,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:20:51,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:20:52,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:20:52,856 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 01:20:52,857 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:20:52,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393867947] [2021-11-21 01:20:52,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393867947] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:20:52,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:20:52,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-21 01:20:52,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242008676] [2021-11-21 01:20:52,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:20:52,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:20:52,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:20:52,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:20:52,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:20:52,904 INFO L87 Difference]: Start difference. First operand has 125 states, 69 states have (on average 1.2028985507246377) internal successors, (83), 69 states have internal predecessors, (83), 39 states have call successors, (39), 16 states have call predecessors, (39), 16 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) Second operand has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-21 01:20:53,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:20:53,304 INFO L93 Difference]: Finished difference Result 197 states and 275 transitions. [2021-11-21 01:20:53,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:20:53,309 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 60 [2021-11-21 01:20:53,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:20:53,331 INFO L225 Difference]: With dead ends: 197 [2021-11-21 01:20:53,331 INFO L226 Difference]: Without dead ends: 152 [2021-11-21 01:20:53,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:20:53,344 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 21 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:20:53,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 777 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:20:53,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-21 01:20:53,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 130. [2021-11-21 01:20:53,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 70 states have (on average 1.1857142857142857) internal successors, (83), 73 states have internal predecessors, (83), 42 states have call successors, (42), 16 states have call predecessors, (42), 17 states have return successors, (42), 40 states have call predecessors, (42), 41 states have call successors, (42) [2021-11-21 01:20:53,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 167 transitions. [2021-11-21 01:20:53,437 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 167 transitions. Word has length 60 [2021-11-21 01:20:53,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:20:53,438 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 167 transitions. [2021-11-21 01:20:53,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-21 01:20:53,439 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 167 transitions. [2021-11-21 01:20:53,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-21 01:20:53,446 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:20:53,447 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:20:53,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:20:53,448 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:20:53,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:20:53,451 INFO L85 PathProgramCache]: Analyzing trace with hash -557245047, now seen corresponding path program 1 times [2021-11-21 01:20:53,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:20:53,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96590755] [2021-11-21 01:20:53,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:20:53,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:20:53,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:20:53,697 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 01:20:53,698 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:20:53,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96590755] [2021-11-21 01:20:53,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96590755] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:20:53,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:20:53,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:20:53,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013324773] [2021-11-21 01:20:53,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:20:53,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:20:53,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:20:53,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:20:53,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:20:53,702 INFO L87 Difference]: Start difference. First operand 130 states and 167 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-21 01:20:53,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:20:53,910 INFO L93 Difference]: Finished difference Result 174 states and 222 transitions. [2021-11-21 01:20:53,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:20:53,912 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 1 states have call successors, (14) Word has length 68 [2021-11-21 01:20:53,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:20:53,917 INFO L225 Difference]: With dead ends: 174 [2021-11-21 01:20:53,917 INFO L226 Difference]: Without dead ends: 134 [2021-11-21 01:20:53,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:20:53,920 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 1 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:20:53,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 552 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:20:53,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-21 01:20:53,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2021-11-21 01:20:53,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 73 states have (on average 1.178082191780822) internal successors, (86), 76 states have internal predecessors, (86), 42 states have call successors, (42), 16 states have call predecessors, (42), 18 states have return successors, (43), 41 states have call predecessors, (43), 41 states have call successors, (43) [2021-11-21 01:20:53,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 171 transitions. [2021-11-21 01:20:53,959 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 171 transitions. Word has length 68 [2021-11-21 01:20:53,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:20:53,960 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 171 transitions. [2021-11-21 01:20:53,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-21 01:20:53,961 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 171 transitions. [2021-11-21 01:20:53,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-21 01:20:53,963 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:20:53,963 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:20:53,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:20:53,964 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:20:53,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:20:53,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1539866196, now seen corresponding path program 1 times [2021-11-21 01:20:53,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:20:53,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430798900] [2021-11-21 01:20:53,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:20:53,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:20:54,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:20:54,309 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 01:20:54,310 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:20:54,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430798900] [2021-11-21 01:20:54,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430798900] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:20:54,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:20:54,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-21 01:20:54,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874177950] [2021-11-21 01:20:54,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:20:54,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 01:20:54,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:20:54,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 01:20:54,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:20:54,315 INFO L87 Difference]: Start difference. First operand 134 states and 171 transitions. Second operand has 9 states, 7 states have (on average 5.0) internal successors, (35), 8 states have internal predecessors, (35), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-21 01:20:54,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:20:54,799 INFO L93 Difference]: Finished difference Result 190 states and 247 transitions. [2021-11-21 01:20:54,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:20:54,800 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 5.0) internal successors, (35), 8 states have internal predecessors, (35), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 68 [2021-11-21 01:20:54,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:20:54,803 INFO L225 Difference]: With dead ends: 190 [2021-11-21 01:20:54,803 INFO L226 Difference]: Without dead ends: 154 [2021-11-21 01:20:54,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-21 01:20:54,805 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 174 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 871 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:20:54,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 871 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:20:54,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-21 01:20:54,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 130. [2021-11-21 01:20:54,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 73 states have internal predecessors, (84), 41 states have call successors, (41), 16 states have call predecessors, (41), 17 states have return successors, (40), 40 states have call predecessors, (40), 39 states have call successors, (40) [2021-11-21 01:20:54,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 165 transitions. [2021-11-21 01:20:54,823 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 165 transitions. Word has length 68 [2021-11-21 01:20:54,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:20:54,823 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 165 transitions. [2021-11-21 01:20:54,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 5.0) internal successors, (35), 8 states have internal predecessors, (35), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-21 01:20:54,824 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 165 transitions. [2021-11-21 01:20:54,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-21 01:20:54,827 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:20:54,827 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:20:54,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 01:20:54,832 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:20:54,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:20:54,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1616400264, now seen corresponding path program 1 times [2021-11-21 01:20:54,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:20:54,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916120831] [2021-11-21 01:20:54,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:20:54,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:20:54,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:20:55,179 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 01:20:55,179 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:20:55,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916120831] [2021-11-21 01:20:55,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916120831] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:20:55,180 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:20:55,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-21 01:20:55,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155648099] [2021-11-21 01:20:55,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:20:55,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:20:55,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:20:55,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:20:55,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:20:55,184 INFO L87 Difference]: Start difference. First operand 130 states and 165 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-21 01:20:55,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:20:55,369 INFO L93 Difference]: Finished difference Result 170 states and 214 transitions. [2021-11-21 01:20:55,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:20:55,371 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 1 states have call successors, (14) Word has length 68 [2021-11-21 01:20:55,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:20:55,374 INFO L225 Difference]: With dead ends: 170 [2021-11-21 01:20:55,374 INFO L226 Difference]: Without dead ends: 138 [2021-11-21 01:20:55,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:20:55,376 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 1 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:20:55,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 832 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:20:55,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-21 01:20:55,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2021-11-21 01:20:55,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 75 states have (on average 1.1733333333333333) internal successors, (88), 77 states have internal predecessors, (88), 41 states have call successors, (41), 16 states have call predecessors, (41), 19 states have return successors, (42), 42 states have call predecessors, (42), 39 states have call successors, (42) [2021-11-21 01:20:55,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 171 transitions. [2021-11-21 01:20:55,400 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 171 transitions. Word has length 68 [2021-11-21 01:20:55,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:20:55,401 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 171 transitions. [2021-11-21 01:20:55,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-21 01:20:55,401 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 171 transitions. [2021-11-21 01:20:55,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-21 01:20:55,403 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:20:55,403 INFO L514 BasicCegarLoop]: 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, 1, 1, 1] [2021-11-21 01:20:55,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 01:20:55,407 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:20:55,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:20:55,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1793464088, now seen corresponding path program 1 times [2021-11-21 01:20:55,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:20:55,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915355658] [2021-11-21 01:20:55,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:20:55,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:20:55,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:20:55,943 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-21 01:20:55,944 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:20:55,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915355658] [2021-11-21 01:20:55,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915355658] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:20:55,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610757879] [2021-11-21 01:20:55,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:20:55,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:20:55,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_faa9a1bd-5526-43f2-abf1-0ceaccb57bd1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:20:55,951 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_faa9a1bd-5526-43f2-abf1-0ceaccb57bd1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:20:55,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_faa9a1bd-5526-43f2-abf1-0ceaccb57bd1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:20:56,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:20:56,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 2613 conjuncts, 100 conjunts are in the unsatisfiable core [2021-11-21 01:20:56,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:20:56,934 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-21 01:20:56,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 35 [2021-11-21 01:20:57,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:57,047 INFO L354 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2021-11-21 01:20:57,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2021-11-21 01:21:03,434 INFO L354 Elim1Store]: treesize reduction 120, result has 21.6 percent of original size [2021-11-21 01:21:03,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 348 treesize of output 224 [2021-11-21 01:21:04,650 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-21 01:21:04,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:21:45,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610757879] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:21:45,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1100696972] [2021-11-21 01:21:45,552 INFO L159 IcfgInterpreter]: Started Sifa with 62 locations of interest [2021-11-21 01:21:45,552 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:21:45,556 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:21:45,577 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:21:45,577 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs