./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5ac34-ac1a-4a74-82cb-070318e8636a/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5ac34-ac1a-4a74-82cb-070318e8636a/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5ac34-ac1a-4a74-82cb-070318e8636a/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5ac34-ac1a-4a74-82cb-070318e8636a/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5ac34-ac1a-4a74-82cb-070318e8636a/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5ac34-ac1a-4a74-82cb-070318e8636a/bin/utaipan-gh47qXpMRh --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 de3da06dbfc8734cb93dce42b312357899e8d9cc914b94ba94740650fa2d8258 --- 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-2329fc7 [2022-12-14 06:03:16,234 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 06:03:16,235 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 06:03:16,253 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 06:03:16,253 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 06:03:16,254 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 06:03:16,256 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 06:03:16,257 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 06:03:16,258 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 06:03:16,259 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 06:03:16,260 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 06:03:16,261 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 06:03:16,261 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 06:03:16,262 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 06:03:16,263 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 06:03:16,264 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 06:03:16,265 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 06:03:16,265 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 06:03:16,267 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 06:03:16,268 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 06:03:16,270 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 06:03:16,271 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 06:03:16,272 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 06:03:16,273 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 06:03:16,276 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 06:03:16,276 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 06:03:16,276 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 06:03:16,277 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 06:03:16,277 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 06:03:16,278 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 06:03:16,278 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 06:03:16,279 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 06:03:16,280 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 06:03:16,280 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 06:03:16,281 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 06:03:16,281 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 06:03:16,282 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 06:03:16,282 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 06:03:16,282 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 06:03:16,283 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 06:03:16,283 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 06:03:16,284 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5ac34-ac1a-4a74-82cb-070318e8636a/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-12-14 06:03:16,305 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 06:03:16,306 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 06:03:16,306 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 06:03:16,306 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 06:03:16,307 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 06:03:16,307 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 06:03:16,307 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 06:03:16,307 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 06:03:16,307 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 06:03:16,308 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 06:03:16,308 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 06:03:16,308 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 06:03:16,308 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 06:03:16,308 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 06:03:16,309 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 06:03:16,309 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 06:03:16,309 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 06:03:16,309 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 06:03:16,310 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 06:03:16,310 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 06:03:16,310 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 06:03:16,310 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 06:03:16,311 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 06:03:16,311 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 06:03:16,311 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 06:03:16,311 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 06:03:16,311 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 06:03:16,312 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 06:03:16,312 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 06:03:16,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:03:16,312 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 06:03:16,312 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 06:03:16,313 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 06:03:16,313 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 06:03:16,313 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 06:03:16,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 06:03:16,313 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 06:03:16,313 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 06:03:16,314 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_91c5ac34-ac1a-4a74-82cb-070318e8636a/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5ac34-ac1a-4a74-82cb-070318e8636a/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de3da06dbfc8734cb93dce42b312357899e8d9cc914b94ba94740650fa2d8258 [2022-12-14 06:03:16,494 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 06:03:16,511 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 06:03:16,513 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 06:03:16,514 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 06:03:16,514 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 06:03:16,515 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5ac34-ac1a-4a74-82cb-070318e8636a/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i [2022-12-14 06:03:19,033 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 06:03:19,437 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 06:03:19,438 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5ac34-ac1a-4a74-82cb-070318e8636a/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i [2022-12-14 06:03:19,465 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5ac34-ac1a-4a74-82cb-070318e8636a/bin/utaipan-gh47qXpMRh/data/67ddcc179/6d17e60d2de44d3ca67b2c7ab9bf53cd/FLAGa1ec76b8f [2022-12-14 06:03:19,587 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5ac34-ac1a-4a74-82cb-070318e8636a/bin/utaipan-gh47qXpMRh/data/67ddcc179/6d17e60d2de44d3ca67b2c7ab9bf53cd [2022-12-14 06:03:19,589 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 06:03:19,590 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 06:03:19,591 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 06:03:19,591 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 06:03:19,594 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 06:03:19,594 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:03:19" (1/1) ... [2022-12-14 06:03:19,595 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29c00016 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:03:19, skipping insertion in model container [2022-12-14 06:03:19,595 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:03:19" (1/1) ... [2022-12-14 06:03:19,601 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 06:03:19,658 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 06:03:19,879 WARN L237 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_91c5ac34-ac1a-4a74-82cb-070318e8636a/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i[4494,4507] [2022-12-14 06:03:19,889 WARN L237 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_91c5ac34-ac1a-4a74-82cb-070318e8636a/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i[4554,4567] [2022-12-14 06:03:20,604 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-14 06:03:20,620 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-14 06:03:20,622 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-12-14 06:03:20,628 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 06:03:20,628 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 06:03:20,629 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 06:03:20,630 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 06:03:20,632 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 06:03:20,635 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-12-14 06:03:20,638 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-14 06:03:20,648 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 06:03:20,648 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-12-14 06:03:20,649 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 06:03:20,651 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 06:03:20,651 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 06:03:20,719 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 06:03:20,720 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 06:03:20,720 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 06:03:20,724 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-14 06:03:20,726 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-14 06:03:20,726 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-14 06:03:20,838 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-14 06:03:20,944 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-14 06:03:20,945 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-14 06:03:20,946 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-14 06:03:20,947 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-14 06:03:20,948 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-14 06:03:20,949 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-14 06:03:20,949 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-14 06:03:20,950 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-14 06:03:20,950 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-14 06:03:20,950 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-14 06:03:20,951 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-14 06:03:21,069 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-14 06:03:21,085 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 06:03:21,085 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 06:03:21,094 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-14 06:03:21,095 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-14 06:03:21,095 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-12-14 06:03:21,100 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-14 06:03:21,101 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-12-14 06:03:21,103 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-14 06:03:21,103 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-14 06:03:21,104 WARN L623 FunctionHandler]: Unknown extern function memchr [2022-12-14 06:03:21,111 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-14 06:03:21,118 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-12-14 06:03:21,121 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-12-14 06:03:21,122 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-12-14 06:03:21,123 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-12-14 06:03:21,131 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-14 06:03:21,136 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 06:03:21,136 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 06:03:21,140 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-12-14 06:03:21,145 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-14 06:03:21,146 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-12-14 06:03:21,162 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-14 06:03:21,174 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-14 06:03:21,179 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:03:21,206 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 06:03:21,215 WARN L237 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_91c5ac34-ac1a-4a74-82cb-070318e8636a/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i[4494,4507] [2022-12-14 06:03:21,216 WARN L237 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_91c5ac34-ac1a-4a74-82cb-070318e8636a/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i[4554,4567] [2022-12-14 06:03:21,248 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-14 06:03:21,254 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-14 06:03:21,255 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-12-14 06:03:21,258 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 06:03:21,258 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 06:03:21,259 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 06:03:21,259 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 06:03:21,260 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 06:03:21,262 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-12-14 06:03:21,263 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-14 06:03:21,283 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 06:03:21,283 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-12-14 06:03:21,284 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 06:03:21,285 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 06:03:21,285 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 06:03:21,291 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 06:03:21,291 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 06:03:21,292 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 06:03:21,295 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-14 06:03:21,296 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-14 06:03:21,296 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-14 06:03:21,299 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-14 06:03:21,316 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-14 06:03:21,317 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-14 06:03:21,317 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-14 06:03:21,318 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-14 06:03:21,319 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-14 06:03:21,319 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-14 06:03:21,320 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-14 06:03:21,320 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-14 06:03:21,321 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-14 06:03:21,321 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-14 06:03:21,321 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-14 06:03:21,340 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-14 06:03:21,351 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 06:03:21,352 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 06:03:21,354 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-14 06:03:21,355 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-14 06:03:21,355 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-12-14 06:03:21,360 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-14 06:03:21,361 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-12-14 06:03:21,362 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-14 06:03:21,363 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-14 06:03:21,364 WARN L623 FunctionHandler]: Unknown extern function memchr [2022-12-14 06:03:21,369 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-14 06:03:21,375 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-12-14 06:03:21,378 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-12-14 06:03:21,379 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-12-14 06:03:21,380 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-12-14 06:03:21,385 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-14 06:03:21,391 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 06:03:21,391 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 06:03:21,394 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-12-14 06:03:21,400 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-14 06:03:21,401 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-12-14 06:03:21,404 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-14 06:03:21,417 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-14 06:03:21,419 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:03:21,602 INFO L208 MainTranslator]: Completed translation [2022-12-14 06:03:21,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:03:21 WrapperNode [2022-12-14 06:03:21,603 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 06:03:21,604 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 06:03:21,604 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 06:03:21,604 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 06:03:21,609 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:03:21" (1/1) ... [2022-12-14 06:03:21,673 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:03:21" (1/1) ... [2022-12-14 06:03:21,724 INFO L138 Inliner]: procedures = 692, calls = 2620, calls flagged for inlining = 60, calls inlined = 10, statements flattened = 956 [2022-12-14 06:03:21,725 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 06:03:21,725 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 06:03:21,725 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 06:03:21,725 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 06:03:21,733 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:03:21" (1/1) ... [2022-12-14 06:03:21,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:03:21" (1/1) ... [2022-12-14 06:03:21,739 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:03:21" (1/1) ... [2022-12-14 06:03:21,740 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:03:21" (1/1) ... [2022-12-14 06:03:21,761 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:03:21" (1/1) ... [2022-12-14 06:03:21,764 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:03:21" (1/1) ... [2022-12-14 06:03:21,769 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:03:21" (1/1) ... [2022-12-14 06:03:21,772 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:03:21" (1/1) ... [2022-12-14 06:03:21,779 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 06:03:21,780 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 06:03:21,780 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 06:03:21,780 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 06:03:21,780 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:03:21" (1/1) ... [2022-12-14 06:03:21,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:03:21,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5ac34-ac1a-4a74-82cb-070318e8636a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:03:21,804 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5ac34-ac1a-4a74-82cb-070318e8636a/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 06:03:21,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5ac34-ac1a-4a74-82cb-070318e8636a/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 06:03:21,838 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2022-12-14 06:03:21,838 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2022-12-14 06:03:21,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 06:03:21,838 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-12-14 06:03:21,838 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-12-14 06:03:21,838 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 06:03:21,839 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2022-12-14 06:03:21,839 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2022-12-14 06:03:21,839 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 06:03:21,839 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 06:03:21,839 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 06:03:21,839 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 06:03:21,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-14 06:03:21,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 06:03:21,839 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 06:03:21,839 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-12-14 06:03:21,840 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-12-14 06:03:21,840 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_realloc [2022-12-14 06:03:21,840 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_realloc [2022-12-14 06:03:21,840 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_reserve [2022-12-14 06:03:21,840 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_reserve [2022-12-14 06:03:21,840 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2022-12-14 06:03:21,840 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2022-12-14 06:03:21,840 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-14 06:03:21,840 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-14 06:03:21,840 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 06:03:21,841 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-14 06:03:21,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-14 06:03:21,841 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2022-12-14 06:03:21,841 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2022-12-14 06:03:21,841 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-12-14 06:03:21,841 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-12-14 06:03:21,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 06:03:21,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 06:03:22,035 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 06:03:22,036 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 06:03:22,837 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 06:03:22,971 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 06:03:22,971 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-14 06:03:22,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:03:22 BoogieIcfgContainer [2022-12-14 06:03:22,974 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 06:03:22,976 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 06:03:22,976 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 06:03:22,979 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 06:03:22,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 06:03:19" (1/3) ... [2022-12-14 06:03:22,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38486e8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:03:22, skipping insertion in model container [2022-12-14 06:03:22,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:03:21" (2/3) ... [2022-12-14 06:03:22,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38486e8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:03:22, skipping insertion in model container [2022-12-14 06:03:22,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:03:22" (3/3) ... [2022-12-14 06:03:22,981 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_reserve_harness.i [2022-12-14 06:03:22,995 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 06:03:22,995 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 06:03:23,040 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 06:03:23,047 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;@24dedaa1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 06:03:23,047 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 06:03:23,051 INFO L276 IsEmpty]: Start isEmpty. Operand has 116 states, 67 states have (on average 1.2537313432835822) internal successors, (84), 67 states have internal predecessors, (84), 37 states have call successors, (37), 11 states have call predecessors, (37), 11 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-12-14 06:03:23,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-14 06:03:23,060 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:03:23,060 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 06:03:23,061 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:03:23,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:03:23,066 INFO L85 PathProgramCache]: Analyzing trace with hash 931198807, now seen corresponding path program 1 times [2022-12-14 06:03:23,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:03:23,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421762949] [2022-12-14 06:03:23,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:03:23,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:03:23,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:03:23,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 06:03:23,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:03:23,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421762949] [2022-12-14 06:03:23,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421762949] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:03:23,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:03:23,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 06:03:23,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201309059] [2022-12-14 06:03:23,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:03:23,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 06:03:23,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:03:23,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 06:03:23,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 06:03:23,597 INFO L87 Difference]: Start difference. First operand has 116 states, 67 states have (on average 1.2537313432835822) internal successors, (84), 67 states have internal predecessors, (84), 37 states have call successors, (37), 11 states have call predecessors, (37), 11 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 06:03:23,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:03:23,731 INFO L93 Difference]: Finished difference Result 215 states and 303 transitions. [2022-12-14 06:03:23,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 06:03:23,733 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 34 [2022-12-14 06:03:23,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:03:23,742 INFO L225 Difference]: With dead ends: 215 [2022-12-14 06:03:23,742 INFO L226 Difference]: Without dead ends: 112 [2022-12-14 06:03:23,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 06:03:23,749 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:03:23,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 138 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:03:23,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-12-14 06:03:23,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-12-14 06:03:23,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 63 states have (on average 1.1746031746031746) internal successors, (74), 64 states have internal predecessors, (74), 37 states have call successors, (37), 11 states have call predecessors, (37), 11 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-12-14 06:03:23,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 147 transitions. [2022-12-14 06:03:23,797 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 147 transitions. Word has length 34 [2022-12-14 06:03:23,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:03:23,799 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 147 transitions. [2022-12-14 06:03:23,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 06:03:23,800 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 147 transitions. [2022-12-14 06:03:23,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 06:03:23,801 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:03:23,802 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:03:23,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 06:03:23,802 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:03:23,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:03:23,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1096268150, now seen corresponding path program 1 times [2022-12-14 06:03:23,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:03:23,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767053530] [2022-12-14 06:03:23,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:03:23,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:03:23,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:03:24,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:03:24,280 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:03:24,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767053530] [2022-12-14 06:03:24,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767053530] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:03:24,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:03:24,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:03:24,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545690048] [2022-12-14 06:03:24,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:03:24,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:03:24,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:03:24,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:03:24,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:03:24,284 INFO L87 Difference]: Start difference. First operand 112 states and 147 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2022-12-14 06:03:24,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:03:24,576 INFO L93 Difference]: Finished difference Result 151 states and 192 transitions. [2022-12-14 06:03:24,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 06:03:24,577 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) Word has length 37 [2022-12-14 06:03:24,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:03:24,578 INFO L225 Difference]: With dead ends: 151 [2022-12-14 06:03:24,578 INFO L226 Difference]: Without dead ends: 116 [2022-12-14 06:03:24,579 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 [2022-12-14 06:03:24,580 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 0 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:03:24,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 640 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:03:24,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-12-14 06:03:24,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2022-12-14 06:03:24,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 66 states have (on average 1.1666666666666667) internal successors, (77), 67 states have internal predecessors, (77), 37 states have call successors, (37), 11 states have call predecessors, (37), 12 states have return successors, (37), 37 states have call predecessors, (37), 36 states have call successors, (37) [2022-12-14 06:03:24,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 151 transitions. [2022-12-14 06:03:24,589 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 151 transitions. Word has length 37 [2022-12-14 06:03:24,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:03:24,590 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 151 transitions. [2022-12-14 06:03:24,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2022-12-14 06:03:24,590 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 151 transitions. [2022-12-14 06:03:24,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 06:03:24,591 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:03:24,591 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 06:03:24,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 06:03:24,591 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:03:24,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:03:24,592 INFO L85 PathProgramCache]: Analyzing trace with hash 861051648, now seen corresponding path program 1 times [2022-12-14 06:03:24,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:03:24,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771387062] [2022-12-14 06:03:24,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:03:24,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:03:25,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:03:31,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:03:31,401 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:03:31,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771387062] [2022-12-14 06:03:31,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771387062] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:03:31,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3563052] [2022-12-14 06:03:31,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:03:31,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:03:31,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5ac34-ac1a-4a74-82cb-070318e8636a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:03:31,403 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5ac34-ac1a-4a74-82cb-070318e8636a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:03:31,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5ac34-ac1a-4a74-82cb-070318e8636a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 06:03:31,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:03:31,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 2454 conjuncts, 61 conjunts are in the unsatisfiable core [2022-12-14 06:03:31,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:03:31,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:03:36,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:03:36,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:03:36,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3563052] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:03:36,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:03:36,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [15] total 26 [2022-12-14 06:03:36,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263624227] [2022-12-14 06:03:36,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:03:36,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 06:03:36,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:03:36,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 06:03:36,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2022-12-14 06:03:36,233 INFO L87 Difference]: Start difference. First operand 116 states and 151 transitions. Second operand has 17 states, 10 states have (on average 2.3) internal successors, (23), 11 states have internal predecessors, (23), 7 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2022-12-14 06:03:39,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:03:42,149 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:03:44,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:03:46,313 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:03:48,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:03:51,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:03:53,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:03:55,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:03:57,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:03:59,985 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:04:01,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:04:04,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:04:06,429 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:04:08,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:04:10,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:04:11,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:04:11,122 INFO L93 Difference]: Finished difference Result 184 states and 225 transitions. [2022-12-14 06:04:11,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 06:04:11,122 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 10 states have (on average 2.3) internal successors, (23), 11 states have internal predecessors, (23), 7 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) Word has length 40 [2022-12-14 06:04:11,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:04:11,123 INFO L225 Difference]: With dead ends: 184 [2022-12-14 06:04:11,124 INFO L226 Difference]: Without dead ends: 182 [2022-12-14 06:04:11,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=208, Invalid=1352, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 06:04:11,125 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 145 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 1492 mSolverCounterSat, 138 mSolverCounterUnsat, 15 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 1645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1492 IncrementalHoareTripleChecker+Invalid, 15 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:04:11,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 792 Invalid, 1645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1492 Invalid, 15 Unknown, 0 Unchecked, 34.3s Time] [2022-12-14 06:04:11,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-12-14 06:04:11,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 180. [2022-12-14 06:04:11,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 103 states have (on average 1.145631067961165) internal successors, (118), 105 states have internal predecessors, (118), 51 states have call successors, (51), 21 states have call predecessors, (51), 25 states have return successors, (53), 53 states have call predecessors, (53), 49 states have call successors, (53) [2022-12-14 06:04:11,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 222 transitions. [2022-12-14 06:04:11,144 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 222 transitions. Word has length 40 [2022-12-14 06:04:11,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:04:11,144 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 222 transitions. [2022-12-14 06:04:11,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 10 states have (on average 2.3) internal successors, (23), 11 states have internal predecessors, (23), 7 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2022-12-14 06:04:11,145 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 222 transitions. [2022-12-14 06:04:11,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 06:04:11,145 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:04:11,145 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:04:11,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5ac34-ac1a-4a74-82cb-070318e8636a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 06:04:11,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5ac34-ac1a-4a74-82cb-070318e8636a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:04:11,347 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:04:11,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:04:11,349 INFO L85 PathProgramCache]: Analyzing trace with hash -288490901, now seen corresponding path program 1 times [2022-12-14 06:04:11,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:04:11,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867280513] [2022-12-14 06:04:11,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:04:11,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:04:11,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:04:12,766 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 06:04:12,766 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:04:12,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867280513] [2022-12-14 06:04:12,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867280513] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:04:12,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:04:12,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-14 06:04:12,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709571265] [2022-12-14 06:04:12,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:04:12,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 06:04:12,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:04:12,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 06:04:12,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-12-14 06:04:12,768 INFO L87 Difference]: Start difference. First operand 180 states and 222 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-12-14 06:04:13,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:04:13,820 INFO L93 Difference]: Finished difference Result 364 states and 455 transitions. [2022-12-14 06:04:13,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 06:04:13,821 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 40 [2022-12-14 06:04:13,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:04:13,823 INFO L225 Difference]: With dead ends: 364 [2022-12-14 06:04:13,823 INFO L226 Difference]: Without dead ends: 211 [2022-12-14 06:04:13,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-12-14 06:04:13,826 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 48 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:04:13,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 649 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 06:04:13,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-12-14 06:04:13,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 194. [2022-12-14 06:04:13,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 111 states have (on average 1.135135135135135) internal successors, (126), 114 states have internal predecessors, (126), 56 states have call successors, (56), 22 states have call predecessors, (56), 26 states have return successors, (58), 57 states have call predecessors, (58), 54 states have call successors, (58) [2022-12-14 06:04:13,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 240 transitions. [2022-12-14 06:04:13,854 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 240 transitions. Word has length 40 [2022-12-14 06:04:13,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:04:13,855 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 240 transitions. [2022-12-14 06:04:13,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-12-14 06:04:13,855 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 240 transitions. [2022-12-14 06:04:13,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 06:04:13,857 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:04:13,857 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:04:13,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 06:04:13,857 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:04:13,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:04:13,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1295673177, now seen corresponding path program 1 times [2022-12-14 06:04:13,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:04:13,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519577661] [2022-12-14 06:04:13,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:04:13,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:04:14,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:04:21,212 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 06:04:21,212 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:04:21,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519577661] [2022-12-14 06:04:21,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519577661] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:04:21,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038082117] [2022-12-14 06:04:21,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:04:21,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:04:21,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5ac34-ac1a-4a74-82cb-070318e8636a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:04:21,214 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5ac34-ac1a-4a74-82cb-070318e8636a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:04:21,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5ac34-ac1a-4a74-82cb-070318e8636a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 06:04:21,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:04:21,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 2457 conjuncts, 67 conjunts are in the unsatisfiable core [2022-12-14 06:04:21,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:04:21,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:04:25,560 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 06:04:25,560 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:04:25,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038082117] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:04:25,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:04:25,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [20] total 32 [2022-12-14 06:04:25,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748839658] [2022-12-14 06:04:25,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:04:25,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 06:04:25,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:04:25,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 06:04:25,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2022-12-14 06:04:25,561 INFO L87 Difference]: Start difference. First operand 194 states and 240 transitions. Second operand has 17 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-12-14 06:04:28,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:04:30,539 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:04:32,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:04:34,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:04:36,920 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:04:40,206 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:04:42,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:04:44,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:04:46,254 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:04:48,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:04:50,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:04:52,328 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:04:54,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:04:56,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:04:58,516 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:04:58,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:04:58,815 INFO L93 Difference]: Finished difference Result 270 states and 323 transitions. [2022-12-14 06:04:58,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 06:04:58,816 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 44 [2022-12-14 06:04:58,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:04:58,818 INFO L225 Difference]: With dead ends: 270 [2022-12-14 06:04:58,818 INFO L226 Difference]: Without dead ends: 268 [2022-12-14 06:04:58,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=189, Invalid=1703, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 06:04:58,819 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 208 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 1228 mSolverCounterSat, 128 mSolverCounterUnsat, 15 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 1016 SdHoareTripleChecker+Invalid, 1371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1228 IncrementalHoareTripleChecker+Invalid, 15 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.7s IncrementalHoareTripleChecker+Time [2022-12-14 06:04:58,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 1016 Invalid, 1371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1228 Invalid, 15 Unknown, 0 Unchecked, 32.7s Time] [2022-12-14 06:04:58,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-12-14 06:04:58,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 249. [2022-12-14 06:04:58,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 143 states have (on average 1.118881118881119) internal successors, (160), 147 states have internal predecessors, (160), 67 states have call successors, (67), 32 states have call predecessors, (67), 38 states have return successors, (70), 69 states have call predecessors, (70), 64 states have call successors, (70) [2022-12-14 06:04:58,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 297 transitions. [2022-12-14 06:04:58,842 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 297 transitions. Word has length 44 [2022-12-14 06:04:58,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:04:58,843 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 297 transitions. [2022-12-14 06:04:58,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-12-14 06:04:58,843 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 297 transitions. [2022-12-14 06:04:58,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 06:04:58,844 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:04:58,844 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 06:04:58,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5ac34-ac1a-4a74-82cb-070318e8636a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-14 06:04:59,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5ac34-ac1a-4a74-82cb-070318e8636a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:04:59,046 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:04:59,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:04:59,047 INFO L85 PathProgramCache]: Analyzing trace with hash -979231170, now seen corresponding path program 1 times [2022-12-14 06:04:59,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:04:59,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817171494] [2022-12-14 06:04:59,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:04:59,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:04:59,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:04:59,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 06:04:59,250 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:04:59,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817171494] [2022-12-14 06:04:59,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817171494] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:04:59,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:04:59,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:04:59,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118246653] [2022-12-14 06:04:59,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:04:59,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:04:59,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:04:59,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:04:59,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:04:59,252 INFO L87 Difference]: Start difference. First operand 249 states and 297 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 1 states have call successors, (9) [2022-12-14 06:04:59,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:04:59,577 INFO L93 Difference]: Finished difference Result 280 states and 330 transitions. [2022-12-14 06:04:59,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 06:04:59,578 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 1 states have call successors, (9) Word has length 46 [2022-12-14 06:04:59,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:04:59,580 INFO L225 Difference]: With dead ends: 280 [2022-12-14 06:04:59,580 INFO L226 Difference]: Without dead ends: 241 [2022-12-14 06:04:59,580 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 [2022-12-14 06:04:59,581 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 0 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:04:59,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 656 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:04:59,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-12-14 06:04:59,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 237. [2022-12-14 06:04:59,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 136 states have (on average 1.1176470588235294) internal successors, (152), 140 states have internal predecessors, (152), 64 states have call successors, (64), 31 states have call predecessors, (64), 36 states have return successors, (66), 65 states have call predecessors, (66), 61 states have call successors, (66) [2022-12-14 06:04:59,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 282 transitions. [2022-12-14 06:04:59,615 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 282 transitions. Word has length 46 [2022-12-14 06:04:59,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:04:59,616 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 282 transitions. [2022-12-14 06:04:59,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 1 states have call successors, (9) [2022-12-14 06:04:59,616 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 282 transitions. [2022-12-14 06:04:59,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 06:04:59,618 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:04:59,619 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:04:59,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 06:04:59,619 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:04:59,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:04:59,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1450173460, now seen corresponding path program 1 times [2022-12-14 06:04:59,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:04:59,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616177278] [2022-12-14 06:04:59,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:04:59,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:04:59,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:05:00,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 06:05:00,348 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:05:00,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616177278] [2022-12-14 06:05:00,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616177278] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:05:00,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:05:00,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 06:05:00,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248497541] [2022-12-14 06:05:00,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:05:00,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 06:05:00,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:05:00,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 06:05:00,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:05:00,350 INFO L87 Difference]: Start difference. First operand 237 states and 282 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 06:05:00,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:05:00,997 INFO L93 Difference]: Finished difference Result 247 states and 291 transitions. [2022-12-14 06:05:00,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 06:05:00,997 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 46 [2022-12-14 06:05:00,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:05:00,998 INFO L225 Difference]: With dead ends: 247 [2022-12-14 06:05:00,998 INFO L226 Difference]: Without dead ends: 245 [2022-12-14 06:05:00,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-12-14 06:05:00,999 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 63 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 06:05:00,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 387 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 06:05:01,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-12-14 06:05:01,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2022-12-14 06:05:01,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 142 states have (on average 1.1126760563380282) internal successors, (158), 146 states have internal predecessors, (158), 64 states have call successors, (64), 33 states have call predecessors, (64), 38 states have return successors, (66), 65 states have call predecessors, (66), 61 states have call successors, (66) [2022-12-14 06:05:01,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 288 transitions. [2022-12-14 06:05:01,019 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 288 transitions. Word has length 46 [2022-12-14 06:05:01,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:05:01,020 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 288 transitions. [2022-12-14 06:05:01,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 06:05:01,020 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 288 transitions. [2022-12-14 06:05:01,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-14 06:05:01,021 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:05:01,021 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:05:01,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 06:05:01,021 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:05:01,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:05:01,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1137322202, now seen corresponding path program 1 times [2022-12-14 06:05:01,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:05:01,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947357076] [2022-12-14 06:05:01,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:05:01,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:05:01,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:05:01,691 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 06:05:01,691 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:05:01,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947357076] [2022-12-14 06:05:01,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947357076] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:05:01,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:05:01,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 06:05:01,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099735946] [2022-12-14 06:05:01,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:05:01,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 06:05:01,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:05:01,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 06:05:01,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:05:01,693 INFO L87 Difference]: Start difference. First operand 245 states and 288 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 06:05:02,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:05:02,403 INFO L93 Difference]: Finished difference Result 255 states and 297 transitions. [2022-12-14 06:05:02,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 06:05:02,404 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 52 [2022-12-14 06:05:02,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:05:02,406 INFO L225 Difference]: With dead ends: 255 [2022-12-14 06:05:02,406 INFO L226 Difference]: Without dead ends: 253 [2022-12-14 06:05:02,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-12-14 06:05:02,407 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 62 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 06:05:02,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 378 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 06:05:02,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-12-14 06:05:02,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2022-12-14 06:05:02,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 148 states have (on average 1.1081081081081081) internal successors, (164), 152 states have internal predecessors, (164), 64 states have call successors, (64), 35 states have call predecessors, (64), 40 states have return successors, (66), 65 states have call predecessors, (66), 61 states have call successors, (66) [2022-12-14 06:05:02,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 294 transitions. [2022-12-14 06:05:02,446 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 294 transitions. Word has length 52 [2022-12-14 06:05:02,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:05:02,446 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 294 transitions. [2022-12-14 06:05:02,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 06:05:02,447 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 294 transitions. [2022-12-14 06:05:02,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 06:05:02,448 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:05:02,448 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:05:02,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 06:05:02,448 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:05:02,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:05:02,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1504251782, now seen corresponding path program 1 times [2022-12-14 06:05:02,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:05:02,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880885955] [2022-12-14 06:05:02,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:05:02,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:05:02,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:05:04,528 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 06:05:04,528 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:05:04,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880885955] [2022-12-14 06:05:04,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880885955] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:05:04,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:05:04,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-12-14 06:05:04,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162101845] [2022-12-14 06:05:04,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:05:04,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 06:05:04,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:05:04,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 06:05:04,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-12-14 06:05:04,530 INFO L87 Difference]: Start difference. First operand 253 states and 294 transitions. Second operand has 13 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-12-14 06:05:06,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:05:06,404 INFO L93 Difference]: Finished difference Result 274 states and 321 transitions. [2022-12-14 06:05:06,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 06:05:06,405 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 54 [2022-12-14 06:05:06,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:05:06,406 INFO L225 Difference]: With dead ends: 274 [2022-12-14 06:05:06,407 INFO L226 Difference]: Without dead ends: 272 [2022-12-14 06:05:06,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-12-14 06:05:06,407 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 85 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 1228 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 1282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-12-14 06:05:06,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 620 Invalid, 1282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1228 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-12-14 06:05:06,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-12-14 06:05:06,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 257. [2022-12-14 06:05:06,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 151 states have (on average 1.1059602649006623) internal successors, (167), 155 states have internal predecessors, (167), 64 states have call successors, (64), 36 states have call predecessors, (64), 41 states have return successors, (66), 65 states have call predecessors, (66), 61 states have call successors, (66) [2022-12-14 06:05:06,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 297 transitions. [2022-12-14 06:05:06,432 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 297 transitions. Word has length 54 [2022-12-14 06:05:06,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:05:06,433 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 297 transitions. [2022-12-14 06:05:06,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-12-14 06:05:06,433 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 297 transitions. [2022-12-14 06:05:06,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-14 06:05:06,433 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:05:06,434 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:05:06,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 06:05:06,434 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:05:06,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:05:06,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1065317234, now seen corresponding path program 1 times [2022-12-14 06:05:06,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:05:06,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411856538] [2022-12-14 06:05:06,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:05:06,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:05:06,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:05:07,507 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 06:05:07,508 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:05:07,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411856538] [2022-12-14 06:05:07,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411856538] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:05:07,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:05:07,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 06:05:07,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420850403] [2022-12-14 06:05:07,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:05:07,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 06:05:07,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:05:07,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 06:05:07,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 06:05:07,510 INFO L87 Difference]: Start difference. First operand 257 states and 297 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 06:05:08,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:05:08,466 INFO L93 Difference]: Finished difference Result 267 states and 306 transitions. [2022-12-14 06:05:08,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 06:05:08,466 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 59 [2022-12-14 06:05:08,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:05:08,467 INFO L225 Difference]: With dead ends: 267 [2022-12-14 06:05:08,467 INFO L226 Difference]: Without dead ends: 263 [2022-12-14 06:05:08,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-12-14 06:05:08,468 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 65 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 06:05:08,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 370 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 06:05:08,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-12-14 06:05:08,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2022-12-14 06:05:08,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 156 states have (on average 1.0961538461538463) internal successors, (171), 159 states have internal predecessors, (171), 64 states have call successors, (64), 38 states have call predecessors, (64), 42 states have return successors, (66), 65 states have call predecessors, (66), 61 states have call successors, (66) [2022-12-14 06:05:08,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 301 transitions. [2022-12-14 06:05:08,494 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 301 transitions. Word has length 59 [2022-12-14 06:05:08,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:05:08,494 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 301 transitions. [2022-12-14 06:05:08,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 06:05:08,494 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 301 transitions. [2022-12-14 06:05:08,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-12-14 06:05:08,495 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:05:08,495 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:05:08,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 06:05:08,495 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:05:08,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:05:08,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1839572000, now seen corresponding path program 1 times [2022-12-14 06:05:08,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:05:08,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104864639] [2022-12-14 06:05:08,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:05:08,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:05:08,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:05:10,402 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 06:05:10,402 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:05:10,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104864639] [2022-12-14 06:05:10,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104864639] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:05:10,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:05:10,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-12-14 06:05:10,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099979131] [2022-12-14 06:05:10,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:05:10,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 06:05:10,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:05:10,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 06:05:10,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2022-12-14 06:05:10,404 INFO L87 Difference]: Start difference. First operand 263 states and 301 transitions. Second operand has 16 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 8 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2022-12-14 06:05:12,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:05:12,415 INFO L93 Difference]: Finished difference Result 286 states and 330 transitions. [2022-12-14 06:05:12,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 06:05:12,415 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 8 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) Word has length 64 [2022-12-14 06:05:12,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:05:12,416 INFO L225 Difference]: With dead ends: 286 [2022-12-14 06:05:12,417 INFO L226 Difference]: Without dead ends: 284 [2022-12-14 06:05:12,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-12-14 06:05:12,417 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 118 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 1505 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 1584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-12-14 06:05:12,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 889 Invalid, 1584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1505 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-12-14 06:05:12,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-12-14 06:05:12,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 267. [2022-12-14 06:05:12,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 159 states have (on average 1.0943396226415094) internal successors, (174), 162 states have internal predecessors, (174), 64 states have call successors, (64), 39 states have call predecessors, (64), 43 states have return successors, (66), 65 states have call predecessors, (66), 61 states have call successors, (66) [2022-12-14 06:05:12,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 304 transitions. [2022-12-14 06:05:12,444 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 304 transitions. Word has length 64 [2022-12-14 06:05:12,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:05:12,444 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 304 transitions. [2022-12-14 06:05:12,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 8 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2022-12-14 06:05:12,445 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 304 transitions. [2022-12-14 06:05:12,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-12-14 06:05:12,445 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:05:12,445 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:05:12,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 06:05:12,446 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:05:12,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:05:12,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1132829050, now seen corresponding path program 1 times [2022-12-14 06:05:12,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:05:12,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229544611] [2022-12-14 06:05:12,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:05:12,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:05:12,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:05:12,696 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 06:05:12,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:05:12,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229544611] [2022-12-14 06:05:12,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229544611] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:05:12,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:05:12,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 06:05:12,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492661488] [2022-12-14 06:05:12,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:05:12,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 06:05:12,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:05:12,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 06:05:12,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:05:12,698 INFO L87 Difference]: Start difference. First operand 267 states and 304 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-12-14 06:05:13,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:05:13,347 INFO L93 Difference]: Finished difference Result 334 states and 388 transitions. [2022-12-14 06:05:13,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:05:13,347 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 66 [2022-12-14 06:05:13,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:05:13,349 INFO L225 Difference]: With dead ends: 334 [2022-12-14 06:05:13,349 INFO L226 Difference]: Without dead ends: 283 [2022-12-14 06:05:13,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:05:13,350 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 8 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 06:05:13,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 536 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 06:05:13,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-12-14 06:05:13,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 271. [2022-12-14 06:05:13,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 162 states have (on average 1.0925925925925926) internal successors, (177), 165 states have internal predecessors, (177), 64 states have call successors, (64), 39 states have call predecessors, (64), 44 states have return successors, (67), 66 states have call predecessors, (67), 61 states have call successors, (67) [2022-12-14 06:05:13,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 308 transitions. [2022-12-14 06:05:13,391 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 308 transitions. Word has length 66 [2022-12-14 06:05:13,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:05:13,392 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 308 transitions. [2022-12-14 06:05:13,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-12-14 06:05:13,392 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 308 transitions. [2022-12-14 06:05:13,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-14 06:05:13,393 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:05:13,393 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:05:13,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 06:05:13,394 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:05:13,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:05:13,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1648771624, now seen corresponding path program 1 times [2022-12-14 06:05:13,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:05:13,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707456485] [2022-12-14 06:05:13,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:05:13,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:05:13,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:05:14,017 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-12-14 06:05:14,018 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:05:14,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707456485] [2022-12-14 06:05:14,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707456485] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:05:14,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:05:14,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:05:14,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643014750] [2022-12-14 06:05:14,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:05:14,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:05:14,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:05:14,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:05:14,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:05:14,019 INFO L87 Difference]: Start difference. First operand 271 states and 308 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-12-14 06:05:14,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:05:14,321 INFO L93 Difference]: Finished difference Result 324 states and 371 transitions. [2022-12-14 06:05:14,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:05:14,322 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 71 [2022-12-14 06:05:14,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:05:14,323 INFO L225 Difference]: With dead ends: 324 [2022-12-14 06:05:14,323 INFO L226 Difference]: Without dead ends: 263 [2022-12-14 06:05:14,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:05:14,324 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 11 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:05:14,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 222 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:05:14,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-12-14 06:05:14,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2022-12-14 06:05:14,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 158 states have (on average 1.0886075949367089) internal successors, (172), 161 states have internal predecessors, (172), 61 states have call successors, (61), 38 states have call predecessors, (61), 43 states have return successors, (64), 63 states have call predecessors, (64), 58 states have call successors, (64) [2022-12-14 06:05:14,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 297 transitions. [2022-12-14 06:05:14,350 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 297 transitions. Word has length 71 [2022-12-14 06:05:14,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:05:14,351 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 297 transitions. [2022-12-14 06:05:14,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-12-14 06:05:14,351 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 297 transitions. [2022-12-14 06:05:14,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-14 06:05:14,352 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:05:14,352 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:05:14,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 06:05:14,352 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:05:14,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:05:14,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1843611861, now seen corresponding path program 1 times [2022-12-14 06:05:14,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:05:14,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134020363] [2022-12-14 06:05:14,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:05:14,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:05:14,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:05:14,543 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 06:05:14,544 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:05:14,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134020363] [2022-12-14 06:05:14,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134020363] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:05:14,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:05:14,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:05:14,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517528314] [2022-12-14 06:05:14,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:05:14,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:05:14,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:05:14,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:05:14,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:05:14,545 INFO L87 Difference]: Start difference. First operand 263 states and 297 transitions. Second operand has 6 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-12-14 06:05:14,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:05:14,941 INFO L93 Difference]: Finished difference Result 312 states and 357 transitions. [2022-12-14 06:05:14,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 06:05:14,942 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 70 [2022-12-14 06:05:14,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:05:14,943 INFO L225 Difference]: With dead ends: 312 [2022-12-14 06:05:14,943 INFO L226 Difference]: Without dead ends: 270 [2022-12-14 06:05:14,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:05:14,943 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 4 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 06:05:14,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 619 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 06:05:14,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-12-14 06:05:14,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 265. [2022-12-14 06:05:14,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 160 states have (on average 1.08125) internal successors, (173), 163 states have internal predecessors, (173), 61 states have call successors, (61), 38 states have call predecessors, (61), 43 states have return successors, (64), 63 states have call predecessors, (64), 58 states have call successors, (64) [2022-12-14 06:05:14,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 298 transitions. [2022-12-14 06:05:14,971 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 298 transitions. Word has length 70 [2022-12-14 06:05:14,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:05:14,971 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 298 transitions. [2022-12-14 06:05:14,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-12-14 06:05:14,971 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 298 transitions. [2022-12-14 06:05:14,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-14 06:05:14,972 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:05:14,972 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:05:14,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 06:05:14,972 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:05:14,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:05:14,972 INFO L85 PathProgramCache]: Analyzing trace with hash 516220715, now seen corresponding path program 1 times [2022-12-14 06:05:14,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:05:14,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016667325] [2022-12-14 06:05:14,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:05:14,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:05:16,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:05:21,274 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 06:05:21,274 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:05:21,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016667325] [2022-12-14 06:05:21,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016667325] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:05:21,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858667781] [2022-12-14 06:05:21,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:05:21,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:05:21,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5ac34-ac1a-4a74-82cb-070318e8636a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:05:21,275 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5ac34-ac1a-4a74-82cb-070318e8636a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:05:21,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5ac34-ac1a-4a74-82cb-070318e8636a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 06:05:21,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:05:21,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 2596 conjuncts, 83 conjunts are in the unsatisfiable core [2022-12-14 06:05:21,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:05:21,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:05:29,906 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:05:29,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 78 treesize of output 62 [2022-12-14 06:05:29,944 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:05:29,944 INFO L350 Elim1Store]: Elim1 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 17 treesize of output 17 [2022-12-14 06:05:30,110 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 06:05:30,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:05:32,315 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 76449 disjunctions. This might take some time... [2022-12-14 06:12:09,562 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 76449 disjunctions.