./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_init_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea555da-3184-4daa-82b0-2b6f1df44c78/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea555da-3184-4daa-82b0-2b6f1df44c78/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea555da-3184-4daa-82b0-2b6f1df44c78/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea555da-3184-4daa-82b0-2b6f1df44c78/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_init_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea555da-3184-4daa-82b0-2b6f1df44c78/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea555da-3184-4daa-82b0-2b6f1df44c78/bin/utaipan-7li7fVZpFI --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 7d8c1ced61af2c61b36782af6d28a32546abe33f0c852d8f862ae04f74aae5e5 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:05:24,002 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:05:24,004 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:05:24,050 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:05:24,050 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:05:24,054 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:05:24,056 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:05:24,058 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:05:24,059 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:05:24,060 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:05:24,061 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:05:24,062 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:05:24,062 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:05:24,063 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:05:24,064 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:05:24,065 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:05:24,066 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:05:24,067 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:05:24,069 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:05:24,070 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:05:24,072 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:05:24,073 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:05:24,074 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:05:24,075 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:05:24,078 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:05:24,078 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:05:24,079 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:05:24,080 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:05:24,080 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:05:24,081 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:05:24,081 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:05:24,082 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:05:24,083 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:05:24,084 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:05:24,085 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:05:24,085 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:05:24,086 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:05:24,086 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:05:24,086 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:05:24,097 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:05:24,099 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:05:24,100 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea555da-3184-4daa-82b0-2b6f1df44c78/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 02:05:24,135 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:05:24,140 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:05:24,141 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:05:24,141 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:05:24,142 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:05:24,142 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:05:24,143 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:05:24,143 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:05:24,143 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:05:24,143 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:05:24,144 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:05:24,145 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:05:24,145 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:05:24,145 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:05:24,145 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:05:24,145 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:05:24,146 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:05:24,146 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:05:24,147 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:05:24,147 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:05:24,147 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:05:24,147 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:05:24,147 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:05:24,148 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:05:24,148 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:05:24,148 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:05:24,148 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:05:24,149 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:05:24,149 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:05:24,149 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:05:24,149 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:05:24,150 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:05:24,150 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:05:24,150 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:05:24,150 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:05:24,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:05:24,151 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:05:24,152 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:05:24,152 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_cea555da-3184-4daa-82b0-2b6f1df44c78/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea555da-3184-4daa-82b0-2b6f1df44c78/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7d8c1ced61af2c61b36782af6d28a32546abe33f0c852d8f862ae04f74aae5e5 [2022-11-03 02:05:24,383 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:05:24,411 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:05:24,414 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:05:24,415 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:05:24,416 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:05:24,418 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea555da-3184-4daa-82b0-2b6f1df44c78/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_init_harness.i [2022-11-03 02:05:24,505 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea555da-3184-4daa-82b0-2b6f1df44c78/bin/utaipan-7li7fVZpFI/data/883a6d654/b21d0b5452fb47f3a7aeefe0145eca4a/FLAG33dc57932 [2022-11-03 02:05:25,239 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:05:25,239 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea555da-3184-4daa-82b0-2b6f1df44c78/sv-benchmarks/c/aws-c-common/aws_byte_buf_init_harness.i [2022-11-03 02:05:25,297 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea555da-3184-4daa-82b0-2b6f1df44c78/bin/utaipan-7li7fVZpFI/data/883a6d654/b21d0b5452fb47f3a7aeefe0145eca4a/FLAG33dc57932 [2022-11-03 02:05:25,318 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea555da-3184-4daa-82b0-2b6f1df44c78/bin/utaipan-7li7fVZpFI/data/883a6d654/b21d0b5452fb47f3a7aeefe0145eca4a [2022-11-03 02:05:25,322 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:05:25,323 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:05:25,327 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:05:25,328 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:05:25,331 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:05:25,333 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:05:25" (1/1) ... [2022-11-03 02:05:25,336 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fa98951 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:25, skipping insertion in model container [2022-11-03 02:05:25,336 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:05:25" (1/1) ... [2022-11-03 02:05:25,344 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:05:25,474 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:05:25,789 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_cea555da-3184-4daa-82b0-2b6f1df44c78/sv-benchmarks/c/aws-c-common/aws_byte_buf_init_harness.i[4491,4504] [2022-11-03 02:05:25,796 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_cea555da-3184-4daa-82b0-2b6f1df44c78/sv-benchmarks/c/aws-c-common/aws_byte_buf_init_harness.i[4551,4564] [2022-11-03 02:05:26,749 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:05:26,750 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:05:26,750 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:05:26,751 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:05:26,753 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:05:26,769 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:05:26,770 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:05:26,772 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:05:26,773 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:05:27,153 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-03 02:05:27,154 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-03 02:05:27,156 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-03 02:05:27,160 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-03 02:05:27,161 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-03 02:05:27,162 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-03 02:05:27,163 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-03 02:05:27,163 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-03 02:05:27,164 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-03 02:05:27,164 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-03 02:05:27,333 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-03 02:05:27,442 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:05:27,442 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:05:27,513 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:05:27,591 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:05:27,622 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_cea555da-3184-4daa-82b0-2b6f1df44c78/sv-benchmarks/c/aws-c-common/aws_byte_buf_init_harness.i[4491,4504] [2022-11-03 02:05:27,623 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_cea555da-3184-4daa-82b0-2b6f1df44c78/sv-benchmarks/c/aws-c-common/aws_byte_buf_init_harness.i[4551,4564] [2022-11-03 02:05:27,693 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:05:27,694 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:05:27,694 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:05:27,695 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:05:27,696 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:05:27,702 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:05:27,703 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:05:27,707 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:05:27,707 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:05:27,758 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-03 02:05:27,759 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-03 02:05:27,760 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-03 02:05:27,761 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-03 02:05:27,762 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-03 02:05:27,762 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-03 02:05:27,763 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-03 02:05:27,763 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-03 02:05:27,764 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-03 02:05:27,764 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-03 02:05:27,803 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-03 02:05:27,872 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:05:27,872 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:05:27,950 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:05:28,139 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:05:28,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:28 WrapperNode [2022-11-03 02:05:28,140 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:05:28,141 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:05:28,141 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:05:28,141 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:05:28,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:28" (1/1) ... [2022-11-03 02:05:28,256 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:28" (1/1) ... [2022-11-03 02:05:28,370 INFO L138 Inliner]: procedures = 690, calls = 2496, calls flagged for inlining = 54, calls inlined = 5, statements flattened = 779 [2022-11-03 02:05:28,373 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:05:28,374 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:05:28,374 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:05:28,374 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:05:28,384 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:28" (1/1) ... [2022-11-03 02:05:28,385 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:28" (1/1) ... [2022-11-03 02:05:28,404 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:28" (1/1) ... [2022-11-03 02:05:28,404 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:28" (1/1) ... [2022-11-03 02:05:28,447 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:28" (1/1) ... [2022-11-03 02:05:28,450 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:28" (1/1) ... [2022-11-03 02:05:28,455 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:28" (1/1) ... [2022-11-03 02:05:28,459 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:28" (1/1) ... [2022-11-03 02:05:28,466 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:05:28,467 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:05:28,468 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:05:28,468 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:05:28,484 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:28" (1/1) ... [2022-11-03 02:05:28,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:05:28,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea555da-3184-4daa-82b0-2b6f1df44c78/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:05:28,577 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea555da-3184-4daa-82b0-2b6f1df44c78/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:05:28,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea555da-3184-4daa-82b0-2b6f1df44c78/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:05:28,629 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2022-11-03 02:05:28,629 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2022-11-03 02:05:28,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:05:28,631 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-11-03 02:05:28,631 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-11-03 02:05:28,632 INFO L130 BoogieDeclarations]: Found specification of procedure aws_allocator_is_valid [2022-11-03 02:05:28,632 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_allocator_is_valid [2022-11-03 02:05:28,633 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 02:05:28,633 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2022-11-03 02:05:28,633 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2022-11-03 02:05:28,633 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 02:05:28,634 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 02:05:28,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:05:28,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:05:28,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 02:05:28,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:05:28,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:05:28,635 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-11-03 02:05:28,635 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-11-03 02:05:28,635 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2022-11-03 02:05:28,635 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2022-11-03 02:05:28,635 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 02:05:28,636 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 02:05:28,636 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_acquire [2022-11-03 02:05:28,637 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_acquire [2022-11-03 02:05:28,637 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:05:28,637 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 02:05:28,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 02:05:28,637 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2022-11-03 02:05:28,637 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2022-11-03 02:05:28,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 02:05:28,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:05:28,957 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:05:28,959 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:05:30,301 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:05:30,624 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:05:30,624 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-03 02:05:30,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:05:30 BoogieIcfgContainer [2022-11-03 02:05:30,628 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:05:30,630 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:05:30,631 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:05:30,634 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:05:30,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:05:25" (1/3) ... [2022-11-03 02:05:30,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2305d116 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:05:30, skipping insertion in model container [2022-11-03 02:05:30,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:28" (2/3) ... [2022-11-03 02:05:30,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2305d116 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:05:30, skipping insertion in model container [2022-11-03 02:05:30,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:05:30" (3/3) ... [2022-11-03 02:05:30,645 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_init_harness.i [2022-11-03 02:05:30,669 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:05:30,669 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:05:30,755 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:05:30,769 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7238a21e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:05:30,770 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:05:30,775 INFO L276 IsEmpty]: Start isEmpty. Operand has 69 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 38 states have internal predecessors, (44), 20 states have call successors, (20), 10 states have call predecessors, (20), 10 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-03 02:05:30,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-03 02:05:30,784 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:30,784 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:05:30,785 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:30,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:30,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1478034123, now seen corresponding path program 1 times [2022-11-03 02:05:30,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:05:30,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510618339] [2022-11-03 02:05:30,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:30,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:05:31,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:38,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:05:38,582 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:05:38,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510618339] [2022-11-03 02:05:38,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510618339] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:38,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:05:38,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-03 02:05:38,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329343912] [2022-11-03 02:05:38,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:38,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 02:05:38,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:05:38,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 02:05:38,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:05:38,640 INFO L87 Difference]: Start difference. First operand has 69 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 38 states have internal predecessors, (44), 20 states have call successors, (20), 10 states have call predecessors, (20), 10 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 11 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-03 02:05:40,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:40,403 INFO L93 Difference]: Finished difference Result 126 states and 172 transitions. [2022-11-03 02:05:40,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 02:05:40,406 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 21 [2022-11-03 02:05:40,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:40,415 INFO L225 Difference]: With dead ends: 126 [2022-11-03 02:05:40,415 INFO L226 Difference]: Without dead ends: 95 [2022-11-03 02:05:40,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:05:40,421 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 75 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:40,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 450 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-03 02:05:40,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-11-03 02:05:40,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 74. [2022-11-03 02:05:40,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 40 states have (on average 1.15) internal successors, (46), 42 states have internal predecessors, (46), 22 states have call successors, (22), 11 states have call predecessors, (22), 11 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-03 02:05:40,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 89 transitions. [2022-11-03 02:05:40,476 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 89 transitions. Word has length 21 [2022-11-03 02:05:40,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:40,477 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 89 transitions. [2022-11-03 02:05:40,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-03 02:05:40,477 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 89 transitions. [2022-11-03 02:05:40,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-03 02:05:40,479 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:40,479 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:05:40,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:05:40,480 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:40,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:40,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1922900274, now seen corresponding path program 1 times [2022-11-03 02:05:40,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:05:40,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776388703] [2022-11-03 02:05:40,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:40,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:05:40,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:40,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:05:40,774 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:05:40,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776388703] [2022-11-03 02:05:40,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776388703] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:40,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:05:40,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:05:40,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383617069] [2022-11-03 02:05:40,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:40,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:05:40,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:05:40,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:05:40,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:05:40,777 INFO L87 Difference]: Start difference. First operand 74 states and 89 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 02:05:41,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:41,448 INFO L93 Difference]: Finished difference Result 92 states and 109 transitions. [2022-11-03 02:05:41,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:05:41,449 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 23 [2022-11-03 02:05:41,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:41,452 INFO L225 Difference]: With dead ends: 92 [2022-11-03 02:05:41,452 INFO L226 Difference]: Without dead ends: 74 [2022-11-03 02:05:41,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:05:41,454 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 1 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:41,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 197 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:05:41,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-03 02:05:41,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-11-03 02:05:41,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 40 states have (on average 1.1) internal successors, (44), 42 states have internal predecessors, (44), 22 states have call successors, (22), 11 states have call predecessors, (22), 11 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-03 02:05:41,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 87 transitions. [2022-11-03 02:05:41,471 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 87 transitions. Word has length 23 [2022-11-03 02:05:41,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:41,472 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 87 transitions. [2022-11-03 02:05:41,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 02:05:41,472 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 87 transitions. [2022-11-03 02:05:41,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-03 02:05:41,473 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:41,473 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:05:41,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:05:41,474 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:41,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:41,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1547318081, now seen corresponding path program 1 times [2022-11-03 02:05:41,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:05:41,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022828571] [2022-11-03 02:05:41,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:41,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:05:41,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:48,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:05:48,443 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:05:48,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022828571] [2022-11-03 02:05:48,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022828571] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:48,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:05:48,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-03 02:05:48,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164254110] [2022-11-03 02:05:48,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:48,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 02:05:48,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:05:48,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 02:05:48,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:05:48,446 INFO L87 Difference]: Start difference. First operand 74 states and 87 transitions. Second operand has 12 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-03 02:05:49,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:49,909 INFO L93 Difference]: Finished difference Result 91 states and 107 transitions. [2022-11-03 02:05:49,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:05:49,910 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 32 [2022-11-03 02:05:49,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:49,911 INFO L225 Difference]: With dead ends: 91 [2022-11-03 02:05:49,912 INFO L226 Difference]: Without dead ends: 89 [2022-11-03 02:05:49,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:05:49,913 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 50 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:49,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 346 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-03 02:05:49,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-03 02:05:49,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 83. [2022-11-03 02:05:49,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 48 states have internal predecessors, (50), 24 states have call successors, (24), 12 states have call predecessors, (24), 12 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2022-11-03 02:05:49,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 97 transitions. [2022-11-03 02:05:49,932 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 97 transitions. Word has length 32 [2022-11-03 02:05:49,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:49,933 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 97 transitions. [2022-11-03 02:05:49,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-03 02:05:49,934 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 97 transitions. [2022-11-03 02:05:49,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-03 02:05:49,935 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:49,935 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:05:49,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:05:49,936 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:49,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:49,936 INFO L85 PathProgramCache]: Analyzing trace with hash -261043334, now seen corresponding path program 1 times [2022-11-03 02:05:49,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:05:49,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128167269] [2022-11-03 02:05:49,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:49,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:05:50,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:52,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:05:52,473 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:05:52,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128167269] [2022-11-03 02:05:52,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128167269] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:52,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:05:52,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:05:52,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872992906] [2022-11-03 02:05:52,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:52,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:05:52,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:05:52,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:05:52,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:05:52,475 INFO L87 Difference]: Start difference. First operand 83 states and 97 transitions. Second operand has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 02:05:54,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:54,094 INFO L93 Difference]: Finished difference Result 89 states and 102 transitions. [2022-11-03 02:05:54,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:05:54,095 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 38 [2022-11-03 02:05:54,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:54,096 INFO L225 Difference]: With dead ends: 89 [2022-11-03 02:05:54,096 INFO L226 Difference]: Without dead ends: 87 [2022-11-03 02:05:54,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:05:54,098 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 21 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:54,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 337 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-03 02:05:54,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-11-03 02:05:54,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-11-03 02:05:54,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 51 states have internal predecessors, (53), 24 states have call successors, (24), 13 states have call predecessors, (24), 13 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2022-11-03 02:05:54,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 100 transitions. [2022-11-03 02:05:54,118 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 100 transitions. Word has length 38 [2022-11-03 02:05:54,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:54,119 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 100 transitions. [2022-11-03 02:05:54,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 02:05:54,119 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 100 transitions. [2022-11-03 02:05:54,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 02:05:54,121 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:54,121 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:05:54,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:05:54,121 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:54,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:54,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1407624461, now seen corresponding path program 1 times [2022-11-03 02:05:54,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:05:54,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474641897] [2022-11-03 02:05:54,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:54,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:05:54,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:55,527 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 02:05:55,527 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:05:55,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474641897] [2022-11-03 02:05:55,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474641897] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:55,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:05:55,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:05:55,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695716831] [2022-11-03 02:05:55,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:55,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:05:55,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:05:55,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:05:55,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:05:55,530 INFO L87 Difference]: Start difference. First operand 87 states and 100 transitions. Second operand has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 02:05:56,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:56,633 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2022-11-03 02:05:56,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:05:56,634 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 44 [2022-11-03 02:05:56,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:56,636 INFO L225 Difference]: With dead ends: 93 [2022-11-03 02:05:56,636 INFO L226 Difference]: Without dead ends: 91 [2022-11-03 02:05:56,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:05:56,637 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 18 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:56,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 320 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:05:56,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-03 02:05:56,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-11-03 02:05:56,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 54 states have internal predecessors, (56), 24 states have call successors, (24), 14 states have call predecessors, (24), 14 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2022-11-03 02:05:56,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2022-11-03 02:05:56,661 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 44 [2022-11-03 02:05:56,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:56,661 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2022-11-03 02:05:56,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 02:05:56,662 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2022-11-03 02:05:56,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-03 02:05:56,663 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:56,664 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:05:56,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 02:05:56,664 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:56,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:56,665 INFO L85 PathProgramCache]: Analyzing trace with hash 444906069, now seen corresponding path program 1 times [2022-11-03 02:05:56,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:05:56,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227641325] [2022-11-03 02:05:56,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:56,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:05:56,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:57,162 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:05:57,162 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:05:57,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227641325] [2022-11-03 02:05:57,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227641325] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:57,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:05:57,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:05:57,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053375048] [2022-11-03 02:05:57,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:57,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:05:57,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:05:57,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:05:57,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:05:57,165 INFO L87 Difference]: Start difference. First operand 91 states and 103 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:05:58,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:58,161 INFO L93 Difference]: Finished difference Result 131 states and 146 transitions. [2022-11-03 02:05:58,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:05:58,162 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 50 [2022-11-03 02:05:58,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:58,163 INFO L225 Difference]: With dead ends: 131 [2022-11-03 02:05:58,163 INFO L226 Difference]: Without dead ends: 97 [2022-11-03 02:05:58,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:05:58,165 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 3 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:58,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 319 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:05:58,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-03 02:05:58,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2022-11-03 02:05:58,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 57 states have internal predecessors, (59), 24 states have call successors, (24), 14 states have call predecessors, (24), 15 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) [2022-11-03 02:05:58,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 107 transitions. [2022-11-03 02:05:58,184 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 107 transitions. Word has length 50 [2022-11-03 02:05:58,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:58,184 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 107 transitions. [2022-11-03 02:05:58,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:05:58,185 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 107 transitions. [2022-11-03 02:05:58,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-03 02:05:58,187 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:58,187 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:05:58,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 02:05:58,188 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:58,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:58,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1456245590, now seen corresponding path program 1 times [2022-11-03 02:05:58,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:05:58,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908799142] [2022-11-03 02:05:58,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:58,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:05:59,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:03,003 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 02:06:03,004 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:06:03,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908799142] [2022-11-03 02:06:03,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908799142] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:06:03,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:06:03,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-03 02:06:03,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325313363] [2022-11-03 02:06:03,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:06:03,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 02:06:03,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:06:03,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 02:06:03,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:06:03,006 INFO L87 Difference]: Start difference. First operand 95 states and 107 transitions. Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 states have internal predecessors, (20), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-03 02:06:04,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:06:04,865 INFO L93 Difference]: Finished difference Result 107 states and 120 transitions. [2022-11-03 02:06:04,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:06:04,866 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 states have internal predecessors, (20), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) Word has length 50 [2022-11-03 02:06:04,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:06:04,867 INFO L225 Difference]: With dead ends: 107 [2022-11-03 02:06:04,867 INFO L226 Difference]: Without dead ends: 78 [2022-11-03 02:06:04,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:06:04,868 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 49 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:06:04,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 316 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 02:06:04,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-03 02:06:04,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-11-03 02:06:04,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 45 states have internal predecessors, (47), 20 states have call successors, (20), 12 states have call predecessors, (20), 13 states have return successors, (20), 20 states have call predecessors, (20), 19 states have call successors, (20) [2022-11-03 02:06:04,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2022-11-03 02:06:04,881 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 50 [2022-11-03 02:06:04,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:06:04,881 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2022-11-03 02:06:04,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 states have internal predecessors, (20), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-03 02:06:04,882 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2022-11-03 02:06:04,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-03 02:06:04,883 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:06:04,883 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:06:04,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 02:06:04,883 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:06:04,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:06:04,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1619350732, now seen corresponding path program 1 times [2022-11-03 02:06:04,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:06:04,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084981410] [2022-11-03 02:06:04,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:04,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:06:04,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:06,478 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:06:06,478 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:06:06,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084981410] [2022-11-03 02:06:06,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084981410] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:06:06,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:06:06,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-03 02:06:06,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652960125] [2022-11-03 02:06:06,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:06:06,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 02:06:06,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:06:06,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 02:06:06,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:06:06,481 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand has 11 states, 8 states have (on average 3.125) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-03 02:06:07,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:06:07,911 INFO L93 Difference]: Finished difference Result 112 states and 123 transitions. [2022-11-03 02:06:07,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:06:07,912 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 3.125) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 54 [2022-11-03 02:06:07,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:06:07,913 INFO L225 Difference]: With dead ends: 112 [2022-11-03 02:06:07,913 INFO L226 Difference]: Without dead ends: 70 [2022-11-03 02:06:07,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:06:07,915 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 11 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:06:07,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 570 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-03 02:06:07,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-03 02:06:07,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-11-03 02:06:07,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 40 states have internal predecessors, (40), 19 states have call successors, (19), 11 states have call predecessors, (19), 11 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-03 02:06:07,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2022-11-03 02:06:07,929 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 54 [2022-11-03 02:06:07,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:06:07,930 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2022-11-03 02:06:07,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 3.125) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-03 02:06:07,931 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2022-11-03 02:06:07,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-03 02:06:07,932 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:06:07,932 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:06:07,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 02:06:07,933 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:06:07,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:06:07,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1523264578, now seen corresponding path program 1 times [2022-11-03 02:06:07,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:06:07,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897039322] [2022-11-03 02:06:07,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:07,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:06:08,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:12,105 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 02:06:12,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:06:12,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897039322] [2022-11-03 02:06:12,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897039322] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:06:12,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:06:12,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:06:12,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915421494] [2022-11-03 02:06:12,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:06:12,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:06:12,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:06:12,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:06:12,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:06:12,107 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand has 10 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-11-03 02:06:13,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:06:13,134 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2022-11-03 02:06:13,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:06:13,135 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 58 [2022-11-03 02:06:13,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:06:13,136 INFO L225 Difference]: With dead ends: 76 [2022-11-03 02:06:13,136 INFO L226 Difference]: Without dead ends: 74 [2022-11-03 02:06:13,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:06:13,138 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 39 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:06:13,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 294 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 02:06:13,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-03 02:06:13,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-11-03 02:06:13,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 43 states have internal predecessors, (43), 19 states have call successors, (19), 12 states have call predecessors, (19), 12 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-03 02:06:13,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2022-11-03 02:06:13,150 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 58 [2022-11-03 02:06:13,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:06:13,151 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2022-11-03 02:06:13,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-11-03 02:06:13,151 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2022-11-03 02:06:13,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-03 02:06:13,152 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:06:13,153 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:06:13,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 02:06:13,153 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:06:13,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:06:13,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1271395820, now seen corresponding path program 1 times [2022-11-03 02:06:13,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:06:13,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091654965] [2022-11-03 02:06:13,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:13,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:06:13,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:20,075 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 02:06:20,076 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:06:20,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091654965] [2022-11-03 02:06:20,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091654965] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:06:20,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68309558] [2022-11-03 02:06:20,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:20,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:06:20,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea555da-3184-4daa-82b0-2b6f1df44c78/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:06:20,079 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea555da-3184-4daa-82b0-2b6f1df44c78/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:06:20,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea555da-3184-4daa-82b0-2b6f1df44c78/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:06:20,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:20,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 2548 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-03 02:06:20,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:21,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:21,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:21,350 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 30 [2022-11-03 02:06:32,552 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:06:32,553 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 259 treesize of output 243 [2022-11-03 02:06:32,679 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:06:32,679 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 26 case distinctions, treesize of input 267 treesize of output 283 [2022-11-03 02:06:32,746 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:06:32,746 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 171 treesize of output 155 [2022-11-03 02:06:33,847 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:06:33,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:06:36,430 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 76449 disjunctions. This might take some time... [2022-11-03 02:14:52,229 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 76449 disjunctions.