./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_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_482b0fed-67bf-4e14-bfd4-1531cf51493f/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482b0fed-67bf-4e14-bfd4-1531cf51493f/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_482b0fed-67bf-4e14-bfd4-1531cf51493f/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482b0fed-67bf-4e14-bfd4-1531cf51493f/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482b0fed-67bf-4e14-bfd4-1531cf51493f/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_482b0fed-67bf-4e14-bfd4-1531cf51493f/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 bcbdd24aa3539f554995115754c17957131f4a70e9c01f3bd768b3e606eed4d4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:39:18,944 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:39:18,946 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:39:18,976 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:39:18,977 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:39:18,978 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:39:18,980 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:39:18,982 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:39:18,985 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:39:18,986 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:39:18,988 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:39:18,989 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:39:18,990 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:39:18,991 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:39:18,992 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:39:18,994 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:39:18,995 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:39:18,996 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:39:18,998 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:39:19,000 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:39:19,002 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:39:19,004 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:39:19,005 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:39:19,006 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:39:19,010 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:39:19,011 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:39:19,011 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:39:19,012 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:39:19,013 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:39:19,014 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:39:19,015 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:39:19,016 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:39:19,017 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:39:19,017 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:39:19,019 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:39:19,019 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:39:19,020 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:39:19,020 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:39:19,020 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:39:19,021 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:39:19,022 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:39:19,023 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482b0fed-67bf-4e14-bfd4-1531cf51493f/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-21 00:39:19,056 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:39:19,056 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:39:19,057 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:39:19,057 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:39:19,064 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:39:19,064 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:39:19,065 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:39:19,065 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:39:19,065 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:39:19,066 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:39:19,067 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:39:19,067 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:39:19,067 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:39:19,068 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:39:19,068 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:39:19,068 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:39:19,069 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:39:19,069 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:39:19,070 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:39:19,070 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:39:19,070 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:39:19,071 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:39:19,071 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:39:19,071 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:39:19,071 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:39:19,072 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:39:19,072 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:39:19,072 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:39:19,073 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:39:19,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:39:19,073 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:39:19,074 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:39:19,074 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:39:19,074 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:39:19,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:39:19,075 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:39:19,075 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:39:19,076 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:39:19,076 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_482b0fed-67bf-4e14-bfd4-1531cf51493f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482b0fed-67bf-4e14-bfd4-1531cf51493f/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bcbdd24aa3539f554995115754c17957131f4a70e9c01f3bd768b3e606eed4d4 [2021-11-21 00:39:19,341 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:39:19,370 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:39:19,373 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:39:19,374 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:39:19,374 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:39:19,375 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482b0fed-67bf-4e14-bfd4-1531cf51493f/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i [2021-11-21 00:39:19,440 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482b0fed-67bf-4e14-bfd4-1531cf51493f/bin/utaipan-TEXQjIfE4P/data/7b19699d6/a00f7cf8941547c696d5a444b5034685/FLAGa924a7fbd [2021-11-21 00:39:20,176 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:39:20,179 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482b0fed-67bf-4e14-bfd4-1531cf51493f/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i [2021-11-21 00:39:20,233 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482b0fed-67bf-4e14-bfd4-1531cf51493f/bin/utaipan-TEXQjIfE4P/data/7b19699d6/a00f7cf8941547c696d5a444b5034685/FLAGa924a7fbd [2021-11-21 00:39:20,321 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482b0fed-67bf-4e14-bfd4-1531cf51493f/bin/utaipan-TEXQjIfE4P/data/7b19699d6/a00f7cf8941547c696d5a444b5034685 [2021-11-21 00:39:20,326 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:39:20,328 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:39:20,332 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:39:20,332 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:39:20,336 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:39:20,337 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:39:20" (1/1) ... [2021-11-21 00:39:20,341 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5678d6a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:39:20, skipping insertion in model container [2021-11-21 00:39:20,341 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:39:20" (1/1) ... [2021-11-21 00:39:20,348 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:39:20,457 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:39:20,747 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_482b0fed-67bf-4e14-bfd4-1531cf51493f/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i[4498,4511] [2021-11-21 00:39:20,754 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_482b0fed-67bf-4e14-bfd4-1531cf51493f/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i[4558,4571] [2021-11-21 00:39:21,546 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:39:21,549 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:39:21,550 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:39:21,551 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:39:21,553 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:39:21,566 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:39:21,567 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:39:21,569 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:39:21,569 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:39:21,571 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:39:21,572 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:39:21,573 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:39:21,574 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:39:21,904 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-21 00:39:21,906 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-21 00:39:21,907 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-21 00:39:21,908 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-21 00:39:21,910 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-21 00:39:21,910 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-21 00:39:21,911 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-21 00:39:21,912 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-21 00:39:21,912 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-21 00:39:21,913 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-21 00:39:22,063 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-21 00:39:22,088 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:39:22,103 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:39:22,116 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_482b0fed-67bf-4e14-bfd4-1531cf51493f/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i[4498,4511] [2021-11-21 00:39:22,117 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_482b0fed-67bf-4e14-bfd4-1531cf51493f/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i[4558,4571] [2021-11-21 00:39:22,204 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:39:22,205 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:39:22,205 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:39:22,206 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:39:22,207 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:39:22,214 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:39:22,215 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:39:22,216 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:39:22,217 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:39:22,218 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:39:22,219 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:39:22,219 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:39:22,220 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:39:22,275 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-21 00:39:22,276 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-21 00:39:22,277 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-21 00:39:22,278 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-21 00:39:22,285 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-21 00:39:22,286 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-21 00:39:22,286 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-21 00:39:22,288 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-21 00:39:22,289 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-21 00:39:22,290 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-21 00:39:22,314 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-21 00:39:22,330 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:39:22,565 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:39:22,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:39:22 WrapperNode [2021-11-21 00:39:22,565 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:39:22,566 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:39:22,566 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:39:22,566 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:39:22,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:39:22" (1/1) ... [2021-11-21 00:39:22,646 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:39:22" (1/1) ... [2021-11-21 00:39:22,692 INFO L137 Inliner]: procedures = 679, calls = 1046, calls flagged for inlining = 52, calls inlined = 8, statements flattened = 225 [2021-11-21 00:39:22,693 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:39:22,694 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:39:22,694 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:39:22,694 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:39:22,708 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:39:22" (1/1) ... [2021-11-21 00:39:22,708 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:39:22" (1/1) ... [2021-11-21 00:39:22,714 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:39:22" (1/1) ... [2021-11-21 00:39:22,714 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:39:22" (1/1) ... [2021-11-21 00:39:22,732 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:39:22" (1/1) ... [2021-11-21 00:39:22,737 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:39:22" (1/1) ... [2021-11-21 00:39:22,743 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:39:22" (1/1) ... [2021-11-21 00:39:22,750 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:39:22,751 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:39:22,751 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:39:22,751 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:39:22,752 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:39:22" (1/1) ... [2021-11-21 00:39:22,759 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:39:22,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482b0fed-67bf-4e14-bfd4-1531cf51493f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:39:22,787 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482b0fed-67bf-4e14-bfd4-1531cf51493f/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:39:22,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482b0fed-67bf-4e14-bfd4-1531cf51493f/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:39:22,832 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2021-11-21 00:39:22,833 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2021-11-21 00:39:22,833 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_remove [2021-11-21 00:39:22,833 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_remove [2021-11-21 00:39:22,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 00:39:22,833 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 00:39:22,833 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-21 00:39:22,834 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-21 00:39:22,834 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-11-21 00:39:22,865 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-11-21 00:39:22,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 00:39:22,865 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2021-11-21 00:39:22,866 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2021-11-21 00:39:22,866 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:39:22,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 00:39:22,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:39:22,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:39:22,866 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2021-11-21 00:39:22,867 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2021-11-21 00:39:22,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-21 00:39:22,867 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-21 00:39:22,867 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-21 00:39:22,867 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-21 00:39:22,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 00:39:22,868 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 00:39:22,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 00:39:22,868 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-21 00:39:22,868 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-21 00:39:22,868 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2021-11-21 00:39:22,868 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2021-11-21 00:39:22,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:39:23,155 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:39:23,156 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:39:23,556 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:39:23,646 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:39:23,647 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-21 00:39:23,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:39:23 BoogieIcfgContainer [2021-11-21 00:39:23,649 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:39:23,651 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:39:23,651 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:39:23,658 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:39:23,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:39:20" (1/3) ... [2021-11-21 00:39:23,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29073a92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:39:23, skipping insertion in model container [2021-11-21 00:39:23,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:39:22" (2/3) ... [2021-11-21 00:39:23,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29073a92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:39:23, skipping insertion in model container [2021-11-21 00:39:23,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:39:23" (3/3) ... [2021-11-21 00:39:23,665 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_pop_back_harness.i [2021-11-21 00:39:23,670 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:39:23,670 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:39:23,720 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:39:23,727 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 00:39:23,727 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:39:23,762 INFO L276 IsEmpty]: Start isEmpty. Operand has 99 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 52 states have internal predecessors, (63), 37 states have call successors, (37), 10 states have call predecessors, (37), 10 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2021-11-21 00:39:23,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-21 00:39:23,770 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:39:23,771 INFO L514 BasicCegarLoop]: trace histogram [9, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2021-11-21 00:39:23,771 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:39:23,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:39:23,777 INFO L85 PathProgramCache]: Analyzing trace with hash -53848961, now seen corresponding path program 1 times [2021-11-21 00:39:23,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:39:23,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845720471] [2021-11-21 00:39:23,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:39:23,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:39:24,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:39:24,322 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-21 00:39:24,322 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:39:24,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845720471] [2021-11-21 00:39:24,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845720471] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:39:24,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500610805] [2021-11-21 00:39:24,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:39:24,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:39:24,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482b0fed-67bf-4e14-bfd4-1531cf51493f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:39:24,337 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482b0fed-67bf-4e14-bfd4-1531cf51493f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:39:24,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482b0fed-67bf-4e14-bfd4-1531cf51493f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:39:24,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:39:24,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-21 00:39:24,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:39:24,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:24,909 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 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-21 00:39:24,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:24,940 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 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-21 00:39:25,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:25,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:25,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:25,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:25,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:25,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:25,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 41 [2021-11-21 00:39:25,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:25,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:25,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:25,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:25,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:25,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:25,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 43 [2021-11-21 00:39:30,157 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-21 00:39:30,157 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:39:30,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500610805] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:39:30,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:39:30,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [5] total 13 [2021-11-21 00:39:30,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479003833] [2021-11-21 00:39:30,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:39:30,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-21 00:39:30,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:39:30,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-21 00:39:30,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-11-21 00:39:30,193 INFO L87 Difference]: Start difference. First operand has 99 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 52 states have internal predecessors, (63), 37 states have call successors, (37), 10 states have call predecessors, (37), 10 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-21 00:39:30,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:39:30,847 INFO L93 Difference]: Finished difference Result 237 states and 363 transitions. [2021-11-21 00:39:30,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-21 00:39:30,850 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 70 [2021-11-21 00:39:30,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:39:30,861 INFO L225 Difference]: With dead ends: 237 [2021-11-21 00:39:30,861 INFO L226 Difference]: Without dead ends: 163 [2021-11-21 00:39:30,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 43 SyntacticMatches, 20 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-11-21 00:39:30,869 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 24 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:39:30,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 769 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 240 Invalid, 0 Unknown, 99 Unchecked, 0.4s Time] [2021-11-21 00:39:30,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-11-21 00:39:30,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 124. [2021-11-21 00:39:30,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 61 states have (on average 1.1967213114754098) internal successors, (73), 63 states have internal predecessors, (73), 49 states have call successors, (49), 13 states have call predecessors, (49), 13 states have return successors, (50), 47 states have call predecessors, (50), 48 states have call successors, (50) [2021-11-21 00:39:30,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 172 transitions. [2021-11-21 00:39:30,943 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 172 transitions. Word has length 70 [2021-11-21 00:39:30,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:39:30,945 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 172 transitions. [2021-11-21 00:39:30,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-21 00:39:30,946 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 172 transitions. [2021-11-21 00:39:30,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-21 00:39:30,957 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:39:30,957 INFO L514 BasicCegarLoop]: trace histogram [9, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2021-11-21 00:39:30,992 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482b0fed-67bf-4e14-bfd4-1531cf51493f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-21 00:39:31,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482b0fed-67bf-4e14-bfd4-1531cf51493f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-21 00:39:31,175 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:39:31,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:39:31,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1869393802, now seen corresponding path program 1 times [2021-11-21 00:39:31,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:39:31,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827827455] [2021-11-21 00:39:31,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:39:31,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:39:31,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:39:31,325 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-21 00:39:31,326 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:39:31,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827827455] [2021-11-21 00:39:31,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827827455] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:39:31,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267358895] [2021-11-21 00:39:31,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:39:31,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:39:31,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482b0fed-67bf-4e14-bfd4-1531cf51493f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:39:31,328 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482b0fed-67bf-4e14-bfd4-1531cf51493f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:39:31,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482b0fed-67bf-4e14-bfd4-1531cf51493f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:39:31,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:39:31,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-21 00:39:31,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:39:31,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-21 00:39:31,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:31,712 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 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-21 00:39:31,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:31,757 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 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-21 00:39:31,839 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 00:39:31,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-21 00:39:31,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:31,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:31,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:31,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 88 [2021-11-21 00:39:31,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:31,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:31,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:31,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 76 [2021-11-21 00:39:31,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:31,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:31,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:31,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:31,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:31,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:32,047 INFO L354 Elim1Store]: treesize reduction 264, result has 14.8 percent of original size [2021-11-21 00:39:32,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 185 treesize of output 139 [2021-11-21 00:39:32,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:32,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:32,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:32,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:32,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:32,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:32,126 INFO L354 Elim1Store]: treesize reduction 310, result has 15.8 percent of original size [2021-11-21 00:39:32,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 178 treesize of output 160 [2021-11-21 00:39:37,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:37,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:37,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:37,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:37,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:37,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:39:37,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:37,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:37,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:39:37,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:37,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:39:37,438 INFO L354 Elim1Store]: treesize reduction 664, result has 0.2 percent of original size [2021-11-21 00:39:37,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 6 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 92 case distinctions, treesize of input 345 treesize of output 239 [2021-11-21 00:39:37,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:37,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:37,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:37,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:37,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:37,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:39:37,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:37,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:37,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:39:37,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:37,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:39:37,489 INFO L354 Elim1Store]: treesize reduction 504, result has 0.2 percent of original size [2021-11-21 00:39:37,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 6 disjoint index pairs (out of 120 index pairs), introduced 14 new quantified variables, introduced 92 case distinctions, treesize of input 191 treesize of output 95 [2021-11-21 00:39:37,559 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 56 proven. 9 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-21 00:39:37,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:40:01,128 WARN L227 SmtUtils]: Spent 6.17s on a formula simplification that was a NOOP. DAG size: 65 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 00:40:08,514 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-21 00:40:08,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 705446 treesize of output 703030 [2021-11-21 00:40:47,203 WARN L227 SmtUtils]: Spent 38.68s on a formula simplification. DAG size of input: 1165 DAG size of output: 1164 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-21 00:40:47,413 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-21 00:40:47,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 8225746 treesize of output 8201018 [2021-11-21 00:51:12,058 WARN L227 SmtUtils]: Spent 10.41m on a formula simplification. DAG size of input: 3641 DAG size of output: 3641 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-21 00:51:13,267 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-21 00:51:13,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2139227908] [2021-11-21 00:51:13,296 INFO L159 IcfgInterpreter]: Started Sifa with 39 locations of interest [2021-11-21 00:51:13,296 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:51:13,301 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:51:13,307 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:51:13,307 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:51:13,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:13,481 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 00:51:13,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2021-11-21 00:51:13,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:13,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2021-11-21 00:51:16,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:16,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:16,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:16,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:16,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:16,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:16,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:16,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:16,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:16,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:16,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:16,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:16,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 00:51:16,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:16,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:16,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:16,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:16,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:16,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:16,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:16,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:16,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:16,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:17,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:17,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:17,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 00:51:17,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:17,112 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 0 case distinctions, treesize of input 24 treesize of output 9 [2021-11-21 00:51:17,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:17,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:17,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2021-11-21 00:51:17,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:17,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:17,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:17,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:17,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:17,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:17,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:17,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:17,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:17,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:17,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:17,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:17,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:17,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:17,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:51:17,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:17,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:17,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:17,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:17,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:51:17,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:51:17,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:17,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:17,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:51:17,388 INFO L354 Elim1Store]: treesize reduction 46, result has 31.3 percent of original size [2021-11-21 00:51:17,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 91 treesize of output 103 [2021-11-21 00:51:17,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:17,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:17,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:17,638 INFO L354 Elim1Store]: treesize reduction 74, result has 38.3 percent of original size [2021-11-21 00:51:17,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 37 treesize of output 74 [2021-11-21 00:51:17,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:17,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:17,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:17,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:17,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:17,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:17,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:17,896 INFO L354 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2021-11-21 00:51:17,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2021-11-21 00:51:18,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:51:18,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2021-11-21 00:51:18,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2021-11-21 00:51:18,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:51:18,417 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-21 00:51:18,423 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-21 00:51:18,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:51:18,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:51:18,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:51:19,003 INFO L354 Elim1Store]: treesize reduction 268, result has 24.9 percent of original size [2021-11-21 00:51:19,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 418 treesize of output 446 [2021-11-21 00:51:19,418 INFO L354 Elim1Store]: treesize reduction 108, result has 48.8 percent of original size [2021-11-21 00:51:19,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 16 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 485 treesize of output 575 [2021-11-21 00:51:19,812 INFO L354 Elim1Store]: treesize reduction 60, result has 61.3 percent of original size [2021-11-21 00:51:19,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 569 treesize of output 650 [2021-11-21 00:51:19,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:19,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:19,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:19,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:19,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:19,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:19,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:19,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:19,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:19,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:19,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:19,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:19,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:19,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:51:19,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:19,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:19,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:19,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:51:19,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:19,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:51:20,158 INFO L354 Elim1Store]: treesize reduction 370, result has 20.4 percent of original size [2021-11-21 00:51:20,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 650 treesize of output 672 [2021-11-21 00:51:20,291 INFO L354 Elim1Store]: treesize reduction 118, result has 17.5 percent of original size [2021-11-21 00:51:20,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 717 treesize of output 688 [2021-11-21 00:51:20,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:20,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:20,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 685 treesize of output 672 [2021-11-21 00:51:20,468 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-21 00:51:20,469 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 673 treesize of output 621 [2021-11-21 00:51:33,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:51:33,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:51:33,433 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-21 00:51:33,433 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 133 treesize of output 120 [2021-11-21 00:51:33,468 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-21 00:51:33,468 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 177 treesize of output 146 [2021-11-21 00:51:33,503 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-21 00:51:33,503 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 192 treesize of output 140 [2021-11-21 00:51:33,542 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-21 00:51:33,543 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 128 treesize of output 76 [2021-11-21 00:51:33,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:33,614 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 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:51:33,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:33,634 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 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-21 00:51:33,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:33,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:33,685 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 0 case distinctions, treesize of input 33 treesize of output 19 [2021-11-21 00:51:33,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:33,790 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 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:51:39,372 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 53 for LOIs [2021-11-21 00:51:39,816 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 25 for LOIs [2021-11-21 00:51:41,595 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2021-11-21 00:51:41,652 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 102 for LOIs [2021-11-21 00:51:41,776 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:52:02,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [2139227908] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:52:02,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:52:02,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [5] total 26 [2021-11-21 00:52:02,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913105578] [2021-11-21 00:52:02,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:52:02,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-21 00:52:02,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:52:02,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-21 00:52:02,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1499, Unknown=10, NotChecked=0, Total=1640 [2021-11-21 00:52:02,752 INFO L87 Difference]: Start difference. First operand 124 states and 172 transitions. Second operand has 23 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 12 states have internal predecessors, (20), 9 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (14), 9 states have call predecessors, (14), 9 states have call successors, (14) [2021-11-21 00:52:10,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:52:10,722 INFO L93 Difference]: Finished difference Result 235 states and 316 transitions. [2021-11-21 00:52:10,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-21 00:52:10,723 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 12 states have internal predecessors, (20), 9 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (14), 9 states have call predecessors, (14), 9 states have call successors, (14) Word has length 71 [2021-11-21 00:52:10,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:52:10,725 INFO L225 Difference]: With dead ends: 235 [2021-11-21 00:52:10,725 INFO L226 Difference]: Without dead ends: 132 [2021-11-21 00:52:10,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 156 SyntacticMatches, 13 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 53.7s TimeCoverageRelationStatistics Valid=184, Invalid=2062, Unknown=10, NotChecked=0, Total=2256 [2021-11-21 00:52:10,729 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 45 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:52:10,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 679 Invalid, 1019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 867 Invalid, 0 Unknown, 92 Unchecked, 1.3s Time] [2021-11-21 00:52:10,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-21 00:52:10,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2021-11-21 00:52:10,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 70 states have (on average 1.2285714285714286) internal successors, (86), 72 states have internal predecessors, (86), 45 states have call successors, (45), 16 states have call predecessors, (45), 16 states have return successors, (46), 43 states have call predecessors, (46), 44 states have call successors, (46) [2021-11-21 00:52:10,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 177 transitions. [2021-11-21 00:52:10,757 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 177 transitions. Word has length 71 [2021-11-21 00:52:10,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:52:10,757 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 177 transitions. [2021-11-21 00:52:10,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 12 states have internal predecessors, (20), 9 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (14), 9 states have call predecessors, (14), 9 states have call successors, (14) [2021-11-21 00:52:10,758 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 177 transitions. [2021-11-21 00:52:10,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-21 00:52:10,759 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:52:10,760 INFO L514 BasicCegarLoop]: trace histogram [9, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:52:10,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482b0fed-67bf-4e14-bfd4-1531cf51493f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-21 00:52:10,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482b0fed-67bf-4e14-bfd4-1531cf51493f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:52:10,976 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:52:10,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:52:10,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1341664707, now seen corresponding path program 1 times [2021-11-21 00:52:10,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:52:10,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840469763] [2021-11-21 00:52:10,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:52:10,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:52:11,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:52:11,191 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-21 00:52:11,191 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:52:11,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840469763] [2021-11-21 00:52:11,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840469763] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:52:11,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233481491] [2021-11-21 00:52:11,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:52:11,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:52:11,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482b0fed-67bf-4e14-bfd4-1531cf51493f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:52:11,195 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482b0fed-67bf-4e14-bfd4-1531cf51493f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:52:11,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482b0fed-67bf-4e14-bfd4-1531cf51493f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 00:52:11,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:52:11,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 00:52:11,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:52:11,598 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-21 00:52:11,599 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:52:11,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233481491] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:52:11,602 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:52:11,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-21 00:52:11,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340940478] [2021-11-21 00:52:11,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:52:11,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 00:52:11,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:52:11,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 00:52:11,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:52:11,604 INFO L87 Difference]: Start difference. First operand 132 states and 177 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-21 00:52:11,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:52:11,907 INFO L93 Difference]: Finished difference Result 237 states and 320 transitions. [2021-11-21 00:52:11,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:52:11,907 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 72 [2021-11-21 00:52:11,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:52:11,910 INFO L225 Difference]: With dead ends: 237 [2021-11-21 00:52:11,910 INFO L226 Difference]: Without dead ends: 137 [2021-11-21 00:52:11,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-11-21 00:52:11,913 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 54 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:52:11,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 520 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:52:11,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-11-21 00:52:11,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 132. [2021-11-21 00:52:11,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 70 states have (on average 1.2142857142857142) internal successors, (85), 72 states have internal predecessors, (85), 45 states have call successors, (45), 16 states have call predecessors, (45), 16 states have return successors, (46), 43 states have call predecessors, (46), 44 states have call successors, (46) [2021-11-21 00:52:11,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 176 transitions. [2021-11-21 00:52:11,949 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 176 transitions. Word has length 72 [2021-11-21 00:52:11,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:52:11,950 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 176 transitions. [2021-11-21 00:52:11,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-21 00:52:11,951 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 176 transitions. [2021-11-21 00:52:11,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-21 00:52:11,952 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:52:11,953 INFO L514 BasicCegarLoop]: trace histogram [9, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:52:11,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482b0fed-67bf-4e14-bfd4-1531cf51493f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 00:52:12,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482b0fed-67bf-4e14-bfd4-1531cf51493f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:52:12,176 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:52:12,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:52:12,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1924319100, now seen corresponding path program 1 times [2021-11-21 00:52:12,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:52:12,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690430431] [2021-11-21 00:52:12,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:52:12,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:52:12,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:52:12,338 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-21 00:52:12,338 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:52:12,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690430431] [2021-11-21 00:52:12,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690430431] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:52:12,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586752694] [2021-11-21 00:52:12,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:52:12,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:52:12,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482b0fed-67bf-4e14-bfd4-1531cf51493f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:52:12,364 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482b0fed-67bf-4e14-bfd4-1531cf51493f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:52:12,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482b0fed-67bf-4e14-bfd4-1531cf51493f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 00:52:12,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:52:12,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 00:52:12,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:52:12,753 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-21 00:52:12,753 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:52:12,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586752694] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:52:12,754 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:52:12,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2021-11-21 00:52:12,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908754067] [2021-11-21 00:52:12,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:52:12,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 00:52:12,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:52:12,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 00:52:12,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-11-21 00:52:12,756 INFO L87 Difference]: Start difference. First operand 132 states and 176 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-21 00:52:13,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:52:13,149 INFO L93 Difference]: Finished difference Result 258 states and 352 transitions. [2021-11-21 00:52:13,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 00:52:13,150 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 74 [2021-11-21 00:52:13,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:52:13,153 INFO L225 Difference]: With dead ends: 258 [2021-11-21 00:52:13,153 INFO L226 Difference]: Without dead ends: 157 [2021-11-21 00:52:13,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-11-21 00:52:13,155 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 83 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:52:13,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 609 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 00:52:13,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-11-21 00:52:13,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 133. [2021-11-21 00:52:13,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 73 states have internal predecessors, (86), 45 states have call successors, (45), 16 states have call predecessors, (45), 16 states have return successors, (46), 43 states have call predecessors, (46), 44 states have call successors, (46) [2021-11-21 00:52:13,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 177 transitions. [2021-11-21 00:52:13,191 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 177 transitions. Word has length 74 [2021-11-21 00:52:13,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:52:13,192 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 177 transitions. [2021-11-21 00:52:13,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-21 00:52:13,193 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 177 transitions. [2021-11-21 00:52:13,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-21 00:52:13,194 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:52:13,194 INFO L514 BasicCegarLoop]: trace histogram [9, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:52:13,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482b0fed-67bf-4e14-bfd4-1531cf51493f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 00:52:13,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482b0fed-67bf-4e14-bfd4-1531cf51493f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:52:13,408 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:52:13,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:52:13,408 INFO L85 PathProgramCache]: Analyzing trace with hash -915652434, now seen corresponding path program 1 times [2021-11-21 00:52:13,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:52:13,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077943493] [2021-11-21 00:52:13,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:52:13,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:52:13,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:52:13,590 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-21 00:52:13,590 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:52:13,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077943493] [2021-11-21 00:52:13,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077943493] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:52:13,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380654457] [2021-11-21 00:52:13,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:52:13,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:52:13,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482b0fed-67bf-4e14-bfd4-1531cf51493f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:52:13,592 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482b0fed-67bf-4e14-bfd4-1531cf51493f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:52:13,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482b0fed-67bf-4e14-bfd4-1531cf51493f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 00:52:13,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:52:13,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 00:52:13,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:52:13,945 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-21 00:52:13,946 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:52:13,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380654457] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:52:13,946 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:52:13,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2021-11-21 00:52:13,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829498307] [2021-11-21 00:52:13,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:52:13,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:52:13,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:52:13,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:52:13,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-21 00:52:13,949 INFO L87 Difference]: Start difference. First operand 133 states and 177 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-21 00:52:14,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:52:14,046 INFO L93 Difference]: Finished difference Result 245 states and 338 transitions. [2021-11-21 00:52:14,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:52:14,047 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 75 [2021-11-21 00:52:14,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:52:14,055 INFO L225 Difference]: With dead ends: 245 [2021-11-21 00:52:14,055 INFO L226 Difference]: Without dead ends: 147 [2021-11-21 00:52:14,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-21 00:52:14,056 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 6 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:52:14,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 226 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:52:14,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-11-21 00:52:14,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 136. [2021-11-21 00:52:14,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 74 states have (on average 1.2162162162162162) internal successors, (90), 76 states have internal predecessors, (90), 45 states have call successors, (45), 16 states have call predecessors, (45), 16 states have return successors, (46), 43 states have call predecessors, (46), 44 states have call successors, (46) [2021-11-21 00:52:14,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 181 transitions. [2021-11-21 00:52:14,110 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 181 transitions. Word has length 75 [2021-11-21 00:52:14,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:52:14,111 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 181 transitions. [2021-11-21 00:52:14,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-21 00:52:14,112 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 181 transitions. [2021-11-21 00:52:14,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-21 00:52:14,116 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:52:14,117 INFO L514 BasicCegarLoop]: trace histogram [9, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:52:14,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482b0fed-67bf-4e14-bfd4-1531cf51493f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 00:52:14,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482b0fed-67bf-4e14-bfd4-1531cf51493f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:52:14,343 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:52:14,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:52:14,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1617287136, now seen corresponding path program 1 times [2021-11-21 00:52:14,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:52:14,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909966560] [2021-11-21 00:52:14,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:52:14,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:52:14,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:52:14,461 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-21 00:52:14,462 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:52:14,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909966560] [2021-11-21 00:52:14,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909966560] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:52:14,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283275387] [2021-11-21 00:52:14,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:52:14,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:52:14,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482b0fed-67bf-4e14-bfd4-1531cf51493f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:52:14,468 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482b0fed-67bf-4e14-bfd4-1531cf51493f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:52:14,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482b0fed-67bf-4e14-bfd4-1531cf51493f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 00:52:14,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:52:14,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-21 00:52:14,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:52:14,952 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-21 00:52:14,953 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:52:14,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283275387] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:52:14,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:52:14,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 12 [2021-11-21 00:52:14,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482603404] [2021-11-21 00:52:14,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:52:14,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-21 00:52:14,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:52:14,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-21 00:52:14,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:52:14,955 INFO L87 Difference]: Start difference. First operand 136 states and 181 transitions. Second operand has 10 states, 7 states have (on average 4.571428571428571) internal successors, (32), 8 states have internal predecessors, (32), 5 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2021-11-21 00:52:15,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:52:15,358 INFO L93 Difference]: Finished difference Result 245 states and 328 transitions. [2021-11-21 00:52:15,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 00:52:15,359 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 4.571428571428571) internal successors, (32), 8 states have internal predecessors, (32), 5 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 78 [2021-11-21 00:52:15,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:52:15,361 INFO L225 Difference]: With dead ends: 245 [2021-11-21 00:52:15,361 INFO L226 Difference]: Without dead ends: 144 [2021-11-21 00:52:15,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-11-21 00:52:15,362 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 27 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:52:15,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 815 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 00:52:15,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-21 00:52:15,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 137. [2021-11-21 00:52:15,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 77 states have internal predecessors, (91), 45 states have call successors, (45), 16 states have call predecessors, (45), 16 states have return successors, (46), 43 states have call predecessors, (46), 44 states have call successors, (46) [2021-11-21 00:52:15,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 182 transitions. [2021-11-21 00:52:15,388 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 182 transitions. Word has length 78 [2021-11-21 00:52:15,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:52:15,389 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 182 transitions. [2021-11-21 00:52:15,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 4.571428571428571) internal successors, (32), 8 states have internal predecessors, (32), 5 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2021-11-21 00:52:15,389 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 182 transitions. [2021-11-21 00:52:15,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-21 00:52:15,391 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:52:15,391 INFO L514 BasicCegarLoop]: trace histogram [9, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:52:15,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482b0fed-67bf-4e14-bfd4-1531cf51493f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 00:52:15,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482b0fed-67bf-4e14-bfd4-1531cf51493f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:52:15,595 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:52:15,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:52:15,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1082961456, now seen corresponding path program 1 times [2021-11-21 00:52:15,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:52:15,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378758671] [2021-11-21 00:52:15,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:52:15,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:52:15,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:52:15,741 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-21 00:52:15,741 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:52:15,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378758671] [2021-11-21 00:52:15,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378758671] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:52:15,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069487059] [2021-11-21 00:52:15,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:52:15,742 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:52:15,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482b0fed-67bf-4e14-bfd4-1531cf51493f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:52:15,744 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482b0fed-67bf-4e14-bfd4-1531cf51493f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:52:15,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482b0fed-67bf-4e14-bfd4-1531cf51493f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 00:52:15,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:52:15,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-21 00:52:15,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:52:15,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-21 00:52:16,128 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 00:52:16,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-21 00:52:16,134 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 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-21 00:52:16,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:16,207 INFO L354 Elim1Store]: treesize reduction 132, result has 15.4 percent of original size [2021-11-21 00:52:16,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 79 treesize of output 47 [2021-11-21 00:52:19,489 INFO L354 Elim1Store]: treesize reduction 183, result has 0.5 percent of original size [2021-11-21 00:52:19,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 88 treesize of output 1 [2021-11-21 00:52:19,559 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 56 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-21 00:52:19,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:52:21,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48356 treesize of output 47844 [2021-11-21 00:52:26,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069487059] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:52:26,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [921596394] [2021-11-21 00:52:26,187 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2021-11-21 00:52:26,187 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:52:26,188 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:52:26,188 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:52:26,188 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:52:26,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:26,319 INFO L354 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2021-11-21 00:52:26,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2021-11-21 00:52:26,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:26,444 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 00:52:26,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2021-11-21 00:52:28,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:28,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:28,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:28,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:28,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:28,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:28,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:28,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:28,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:28,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:28,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:28,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:28,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 00:52:28,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:28,600 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 0 case distinctions, treesize of input 24 treesize of output 9 [2021-11-21 00:52:28,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:28,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:28,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:28,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:28,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:28,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:28,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:28,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:28,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:28,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:28,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:28,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:28,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 00:52:28,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:28,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:28,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2021-11-21 00:52:28,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:28,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:28,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:28,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:28,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2021-11-21 00:52:28,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:28,854 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 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:52:28,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:28,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:28,968 INFO L354 Elim1Store]: treesize reduction 82, result has 35.9 percent of original size [2021-11-21 00:52:28,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 37 treesize of output 74 [2021-11-21 00:52:29,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:52:29,125 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-21 00:52:29,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2021-11-21 00:52:29,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,408 INFO L354 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2021-11-21 00:52:29,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2021-11-21 00:52:29,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:52:29,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2021-11-21 00:52:29,705 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-21 00:52:29,712 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-21 00:52:29,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:52:29,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:52:29,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:29,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:52:30,252 INFO L354 Elim1Store]: treesize reduction 268, result has 24.9 percent of original size [2021-11-21 00:52:30,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 418 treesize of output 446 [2021-11-21 00:52:30,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:30,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:30,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:30,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:30,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:30,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:30,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:30,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:30,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:30,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:30,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:30,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:30,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:30,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:52:30,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:30,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:30,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:30,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:52:30,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:30,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:52:30,506 INFO L354 Elim1Store]: treesize reduction 364, result has 21.7 percent of original size [2021-11-21 00:52:30,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 503 treesize of output 519 [2021-11-21 00:52:30,835 INFO L354 Elim1Store]: treesize reduction 108, result has 48.8 percent of original size [2021-11-21 00:52:30,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 16 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 552 treesize of output 642 [2021-11-21 00:52:31,151 INFO L354 Elim1Store]: treesize reduction 60, result has 61.3 percent of original size [2021-11-21 00:52:31,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 636 treesize of output 717 [2021-11-21 00:52:31,243 INFO L354 Elim1Store]: treesize reduction 118, result has 17.5 percent of original size [2021-11-21 00:52:31,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 717 treesize of output 688 [2021-11-21 00:52:31,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:31,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:31,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 685 treesize of output 672 [2021-11-21 00:52:31,435 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-21 00:52:31,436 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 673 treesize of output 621 [2021-11-21 00:52:45,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:52:45,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:52:45,349 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-21 00:52:45,349 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 133 treesize of output 120 [2021-11-21 00:52:45,382 INFO L354 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2021-11-21 00:52:45,382 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 166 treesize of output 132 [2021-11-21 00:52:45,414 INFO L354 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2021-11-21 00:52:45,415 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 120 treesize of output 86 [2021-11-21 00:52:45,438 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-21 00:52:45,439 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 73 treesize of output 54 [2021-11-21 00:52:45,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:45,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:45,513 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 0 case distinctions, treesize of input 33 treesize of output 19 [2021-11-21 00:52:45,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:45,561 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 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:52:45,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:45,601 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 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-21 00:52:45,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:45,666 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 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:52:52,163 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 52 for LOIs [2021-11-21 00:52:52,644 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 25 for LOIs [2021-11-21 00:53:00,093 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2021-11-21 00:53:00,143 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 102 for LOIs [2021-11-21 00:53:00,267 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2021-11-21 00:53:00,972 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:53:07,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [921596394] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:53:07,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:53:07,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [7, 13] total 48 [2021-11-21 00:53:07,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865624800] [2021-11-21 00:53:07,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:53:07,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-21 00:53:07,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:53:07,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-21 00:53:07,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=3074, Unknown=2, NotChecked=0, Total=3306 [2021-11-21 00:53:07,029 INFO L87 Difference]: Start difference. First operand 137 states and 182 transitions. Second operand has 31 states, 20 states have (on average 1.45) internal successors, (29), 18 states have internal predecessors, (29), 10 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (15), 10 states have call predecessors, (15), 10 states have call successors, (15)