./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 38b53e6a 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_691ed4a3-e2ef-4cb6-897b-95b13dec25bf/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691ed4a3-e2ef-4cb6-897b-95b13dec25bf/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691ed4a3-e2ef-4cb6-897b-95b13dec25bf/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691ed4a3-e2ef-4cb6-897b-95b13dec25bf/bin/utaipan-ByfvJB40ur/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_691ed4a3-e2ef-4cb6-897b-95b13dec25bf/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691ed4a3-e2ef-4cb6-897b-95b13dec25bf/bin/utaipan-ByfvJB40ur --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-38b53e6 [2022-11-25 22:26:01,839 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 22:26:01,841 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 22:26:01,861 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 22:26:01,862 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 22:26:01,863 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 22:26:01,865 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 22:26:01,867 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 22:26:01,868 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 22:26:01,870 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 22:26:01,871 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 22:26:01,872 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 22:26:01,873 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 22:26:01,874 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 22:26:01,875 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 22:26:01,877 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 22:26:01,878 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 22:26:01,879 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 22:26:01,881 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 22:26:01,883 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 22:26:01,885 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 22:26:01,887 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 22:26:01,888 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 22:26:01,889 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 22:26:01,893 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 22:26:01,893 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 22:26:01,893 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 22:26:01,894 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 22:26:01,895 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 22:26:01,896 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 22:26:01,897 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 22:26:01,898 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 22:26:01,909 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 22:26:01,911 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 22:26:01,912 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 22:26:01,912 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 22:26:01,913 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 22:26:01,914 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 22:26:01,914 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 22:26:01,915 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 22:26:01,916 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 22:26:01,919 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691ed4a3-e2ef-4cb6-897b-95b13dec25bf/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-25 22:26:01,967 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 22:26:01,967 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 22:26:01,968 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 22:26:01,968 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 22:26:01,969 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 22:26:01,969 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 22:26:01,969 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 22:26:01,970 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 22:26:01,970 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 22:26:01,970 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 22:26:01,975 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 22:26:01,975 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 22:26:01,975 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 22:26:01,975 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 22:26:01,976 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 22:26:01,976 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 22:26:01,976 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 22:26:01,976 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 22:26:01,977 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 22:26:01,977 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 22:26:01,978 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 22:26:01,978 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 22:26:01,978 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 22:26:01,979 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 22:26:01,979 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 22:26:01,980 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 22:26:01,980 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 22:26:01,980 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 22:26:01,981 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 22:26:01,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:26:01,982 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 22:26:01,982 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 22:26:01,983 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 22:26:01,983 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 22:26:01,983 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 22:26:01,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 22:26:01,984 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 22:26:01,984 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 22:26:01,984 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_691ed4a3-e2ef-4cb6-897b-95b13dec25bf/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691ed4a3-e2ef-4cb6-897b-95b13dec25bf/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de3da06dbfc8734cb93dce42b312357899e8d9cc914b94ba94740650fa2d8258 [2022-11-25 22:26:02,306 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 22:26:02,345 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 22:26:02,348 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 22:26:02,349 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 22:26:02,350 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 22:26:02,351 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691ed4a3-e2ef-4cb6-897b-95b13dec25bf/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i [2022-11-25 22:26:05,500 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 22:26:06,093 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 22:26:06,096 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691ed4a3-e2ef-4cb6-897b-95b13dec25bf/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i [2022-11-25 22:26:06,146 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691ed4a3-e2ef-4cb6-897b-95b13dec25bf/bin/utaipan-ByfvJB40ur/data/e326390ac/ce51ff63dfe742d39008b37a69aff36e/FLAG9b32c6403 [2022-11-25 22:26:06,167 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691ed4a3-e2ef-4cb6-897b-95b13dec25bf/bin/utaipan-ByfvJB40ur/data/e326390ac/ce51ff63dfe742d39008b37a69aff36e [2022-11-25 22:26:06,172 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 22:26:06,175 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 22:26:06,180 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 22:26:06,180 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 22:26:06,184 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 22:26:06,186 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:26:06" (1/1) ... [2022-11-25 22:26:06,187 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41cc8322 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:26:06, skipping insertion in model container [2022-11-25 22:26:06,187 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:26:06" (1/1) ... [2022-11-25 22:26:06,196 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 22:26:06,317 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 22:26:06,626 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_691ed4a3-e2ef-4cb6-897b-95b13dec25bf/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i[4494,4507] [2022-11-25 22:26:06,640 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_691ed4a3-e2ef-4cb6-897b-95b13dec25bf/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i[4554,4567] [2022-11-25 22:26:07,758 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 22:26:07,781 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 22:26:07,784 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-11-25 22:26:07,790 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:26:07,791 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:26:07,791 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:26:07,792 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:26:07,793 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:26:07,804 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-11-25 22:26:07,807 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 22:26:07,820 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:26:07,829 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-11-25 22:26:07,830 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:26:07,832 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:26:07,835 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:26:07,952 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 22:26:07,953 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 22:26:07,954 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 22:26:07,959 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-11-25 22:26:08,004 WARN L623 FunctionHandler]: Unknown extern function htons [2022-11-25 22:26:08,005 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-11-25 22:26:08,193 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 22:26:08,370 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-11-25 22:26:08,371 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-25 22:26:08,373 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-25 22:26:08,374 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-25 22:26:08,375 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-25 22:26:08,377 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-25 22:26:08,378 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-25 22:26:08,378 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-25 22:26:08,379 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-25 22:26:08,380 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-25 22:26:08,381 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-25 22:26:08,604 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-25 22:26:08,625 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:26:08,638 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:26:08,652 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 22:26:08,653 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 22:26:08,655 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-11-25 22:26:08,663 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 22:26:08,668 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-11-25 22:26:08,676 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 22:26:08,683 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 22:26:08,685 WARN L623 FunctionHandler]: Unknown extern function memchr [2022-11-25 22:26:08,695 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-25 22:26:08,705 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-11-25 22:26:08,711 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-11-25 22:26:08,716 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-11-25 22:26:08,718 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-11-25 22:26:08,730 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-25 22:26:08,748 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:26:08,753 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:26:08,765 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-11-25 22:26:08,782 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 22:26:08,786 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-11-25 22:26:08,809 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 22:26:08,838 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-11-25 22:26:08,845 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:26:08,926 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 22:26:08,955 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_691ed4a3-e2ef-4cb6-897b-95b13dec25bf/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i[4494,4507] [2022-11-25 22:26:08,963 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_691ed4a3-e2ef-4cb6-897b-95b13dec25bf/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i[4554,4567] [2022-11-25 22:26:09,009 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 22:26:09,015 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 22:26:09,016 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-11-25 22:26:09,028 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:26:09,029 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:26:09,031 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:26:09,032 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:26:09,033 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:26:09,035 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-11-25 22:26:09,037 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 22:26:09,046 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:26:09,047 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-11-25 22:26:09,047 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:26:09,048 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:26:09,049 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:26:09,064 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 22:26:09,065 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 22:26:09,065 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 22:26:09,071 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-11-25 22:26:09,072 WARN L623 FunctionHandler]: Unknown extern function htons [2022-11-25 22:26:09,073 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-11-25 22:26:09,077 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 22:26:09,115 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-11-25 22:26:09,116 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-25 22:26:09,118 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-25 22:26:09,119 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-25 22:26:09,120 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-25 22:26:09,121 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-25 22:26:09,122 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-25 22:26:09,123 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-25 22:26:09,132 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-25 22:26:09,134 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-25 22:26:09,136 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-25 22:26:09,167 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-25 22:26:09,189 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:26:09,191 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:26:09,193 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 22:26:09,195 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 22:26:09,196 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-11-25 22:26:09,202 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 22:26:09,203 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-11-25 22:26:09,205 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 22:26:09,206 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 22:26:09,207 WARN L623 FunctionHandler]: Unknown extern function memchr [2022-11-25 22:26:09,218 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-25 22:26:09,225 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-11-25 22:26:09,230 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-11-25 22:26:09,230 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-11-25 22:26:09,231 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-11-25 22:26:09,238 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-25 22:26:09,253 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:26:09,254 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:26:09,259 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-11-25 22:26:09,265 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 22:26:09,266 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-11-25 22:26:09,272 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 22:26:09,297 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-11-25 22:26:09,300 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:26:09,529 INFO L208 MainTranslator]: Completed translation [2022-11-25 22:26:09,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:26:09 WrapperNode [2022-11-25 22:26:09,530 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 22:26:09,531 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 22:26:09,531 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 22:26:09,531 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 22:26:09,539 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:26:09" (1/1) ... [2022-11-25 22:26:09,672 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:26:09" (1/1) ... [2022-11-25 22:26:09,784 INFO L138 Inliner]: procedures = 692, calls = 2620, calls flagged for inlining = 60, calls inlined = 10, statements flattened = 956 [2022-11-25 22:26:09,785 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 22:26:09,786 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 22:26:09,786 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 22:26:09,786 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 22:26:09,796 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:26:09" (1/1) ... [2022-11-25 22:26:09,796 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:26:09" (1/1) ... [2022-11-25 22:26:09,818 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:26:09" (1/1) ... [2022-11-25 22:26:09,818 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:26:09" (1/1) ... [2022-11-25 22:26:09,881 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:26:09" (1/1) ... [2022-11-25 22:26:09,887 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:26:09" (1/1) ... [2022-11-25 22:26:09,908 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:26:09" (1/1) ... [2022-11-25 22:26:09,912 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:26:09" (1/1) ... [2022-11-25 22:26:09,922 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 22:26:09,923 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 22:26:09,923 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 22:26:09,923 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 22:26:09,924 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:26:09" (1/1) ... [2022-11-25 22:26:09,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:26:09,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691ed4a3-e2ef-4cb6-897b-95b13dec25bf/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:26:09,965 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691ed4a3-e2ef-4cb6-897b-95b13dec25bf/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 22:26:09,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691ed4a3-e2ef-4cb6-897b-95b13dec25bf/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 22:26:10,020 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2022-11-25 22:26:10,021 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2022-11-25 22:26:10,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 22:26:10,022 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-11-25 22:26:10,028 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-11-25 22:26:10,028 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 22:26:10,028 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2022-11-25 22:26:10,029 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2022-11-25 22:26:10,029 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-25 22:26:10,029 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-25 22:26:10,029 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 22:26:10,030 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 22:26:10,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-25 22:26:10,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 22:26:10,031 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 22:26:10,031 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-11-25 22:26:10,031 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-11-25 22:26:10,031 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_realloc [2022-11-25 22:26:10,032 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_realloc [2022-11-25 22:26:10,032 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_reserve [2022-11-25 22:26:10,032 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_reserve [2022-11-25 22:26:10,032 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2022-11-25 22:26:10,032 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2022-11-25 22:26:10,033 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-25 22:26:10,033 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-25 22:26:10,033 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 22:26:10,033 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-25 22:26:10,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-25 22:26:10,034 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2022-11-25 22:26:10,034 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2022-11-25 22:26:10,035 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-25 22:26:10,035 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-25 22:26:10,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 22:26:10,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 22:26:10,440 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 22:26:10,443 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 22:26:11,936 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 22:26:12,238 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 22:26:12,238 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-25 22:26:12,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:26:12 BoogieIcfgContainer [2022-11-25 22:26:12,241 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 22:26:12,245 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 22:26:12,245 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 22:26:12,248 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 22:26:12,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 10:26:06" (1/3) ... [2022-11-25 22:26:12,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@259458d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:26:12, skipping insertion in model container [2022-11-25 22:26:12,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:26:09" (2/3) ... [2022-11-25 22:26:12,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@259458d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:26:12, skipping insertion in model container [2022-11-25 22:26:12,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:26:12" (3/3) ... [2022-11-25 22:26:12,254 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_reserve_harness.i [2022-11-25 22:26:12,274 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 22:26:12,274 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 22:26:12,329 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 22:26:12,336 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;@2d95d64a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 22:26:12,336 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 22:26:12,341 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) [2022-11-25 22:26:12,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-25 22:26:12,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:26:12,351 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] [2022-11-25 22:26:12,351 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:26:12,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:26:12,357 INFO L85 PathProgramCache]: Analyzing trace with hash -355170412, now seen corresponding path program 1 times [2022-11-25 22:26:12,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:26:12,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106398207] [2022-11-25 22:26:12,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:26:12,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:26:12,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:26:13,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 22:26:13,099 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:26:13,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106398207] [2022-11-25 22:26:13,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106398207] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:26:13,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:26:13,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 22:26:13,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161215924] [2022-11-25 22:26:13,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:26:13,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 22:26:13,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:26:13,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 22:26:13,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 22:26:13,156 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) [2022-11-25 22:26:13,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:26:13,339 INFO L93 Difference]: Finished difference Result 215 states and 303 transitions. [2022-11-25 22:26:13,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 22:26:13,342 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 [2022-11-25 22:26:13,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:26:13,352 INFO L225 Difference]: With dead ends: 215 [2022-11-25 22:26:13,352 INFO L226 Difference]: Without dead ends: 112 [2022-11-25 22:26:13,356 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 [2022-11-25 22:26:13,359 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 [2022-11-25 22:26:13,360 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] [2022-11-25 22:26:13,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-25 22:26:13,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-11-25 22:26:13,406 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) [2022-11-25 22:26:13,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 147 transitions. [2022-11-25 22:26:13,410 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 147 transitions. Word has length 34 [2022-11-25 22:26:13,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:26:13,412 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 147 transitions. [2022-11-25 22:26:13,412 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) [2022-11-25 22:26:13,413 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 147 transitions. [2022-11-25 22:26:13,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-25 22:26:13,415 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:26:13,415 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] [2022-11-25 22:26:13,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 22:26:13,416 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:26:13,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:26:13,417 INFO L85 PathProgramCache]: Analyzing trace with hash -424375952, now seen corresponding path program 1 times [2022-11-25 22:26:13,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:26:13,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821884520] [2022-11-25 22:26:13,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:26:13,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:26:13,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:26:14,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 22:26:14,180 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:26:14,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821884520] [2022-11-25 22:26:14,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821884520] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:26:14,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:26:14,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 22:26:14,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141004017] [2022-11-25 22:26:14,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:26:14,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 22:26:14,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:26:14,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 22:26:14,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:26:14,188 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) [2022-11-25 22:26:14,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:26:14,566 INFO L93 Difference]: Finished difference Result 151 states and 192 transitions. [2022-11-25 22:26:14,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 22:26:14,567 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 [2022-11-25 22:26:14,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:26:14,569 INFO L225 Difference]: With dead ends: 151 [2022-11-25 22:26:14,569 INFO L226 Difference]: Without dead ends: 116 [2022-11-25 22:26:14,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:26:14,571 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 [2022-11-25 22:26:14,572 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] [2022-11-25 22:26:14,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-25 22:26:14,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2022-11-25 22:26:14,585 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) [2022-11-25 22:26:14,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 151 transitions. [2022-11-25 22:26:14,587 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 151 transitions. Word has length 37 [2022-11-25 22:26:14,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:26:14,587 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 151 transitions. [2022-11-25 22:26:14,588 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) [2022-11-25 22:26:14,588 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 151 transitions. [2022-11-25 22:26:14,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-25 22:26:14,589 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:26:14,589 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] [2022-11-25 22:26:14,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 22:26:14,590 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:26:14,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:26:14,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1641044390, now seen corresponding path program 1 times [2022-11-25 22:26:14,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:26:14,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466486301] [2022-11-25 22:26:14,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:26:14,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:26:16,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:26:26,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 22:26:26,751 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:26:26,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466486301] [2022-11-25 22:26:26,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466486301] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:26:26,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057434803] [2022-11-25 22:26:26,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:26:26,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:26:26,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691ed4a3-e2ef-4cb6-897b-95b13dec25bf/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:26:26,758 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691ed4a3-e2ef-4cb6-897b-95b13dec25bf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:26:26,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691ed4a3-e2ef-4cb6-897b-95b13dec25bf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 22:26:27,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:26:27,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 2454 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-25 22:26:27,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:26:27,700 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 [2022-11-25 22:26:34,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:26:34,299 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:26:34,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057434803] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:26:34,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:26:34,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [15] total 26 [2022-11-25 22:26:34,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962060607] [2022-11-25 22:26:34,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:26:34,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 22:26:34,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:26:34,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 22:26:34,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2022-11-25 22:26:34,304 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) [2022-11-25 22:26:37,768 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 22:26:40,378 WARN L539 Checker$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] [2022-11-25 22:26:42,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 22:26:44,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 22:26:46,671 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 22:26:50,962 WARN L539 Checker$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] [2022-11-25 22:26:52,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 22:26:55,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 22:26:57,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 22:26:59,152 WARN L539 Checker$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] [2022-11-25 22:27:01,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 22:27:03,704 WARN L539 Checker$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] [2022-11-25 22:27:05,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 22:27:07,866 WARN L539 Checker$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] [2022-11-25 22:27:09,878 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] [2022-11-25 22:27:10,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:27:10,630 INFO L93 Difference]: Finished difference Result 184 states and 225 transitions. [2022-11-25 22:27:10,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 22:27:10,635 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 [2022-11-25 22:27:10,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:27:10,637 INFO L225 Difference]: With dead ends: 184 [2022-11-25 22:27:10,637 INFO L226 Difference]: Without dead ends: 182 [2022-11-25 22:27:10,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=208, Invalid=1352, Unknown=0, NotChecked=0, Total=1560 [2022-11-25 22:27:10,639 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 145 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 1490 mSolverCounterSat, 138 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 1645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1490 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:27:10,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 792 Invalid, 1645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1490 Invalid, 17 Unknown, 0 Unchecked, 35.4s Time] [2022-11-25 22:27:10,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-11-25 22:27:10,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 180. [2022-11-25 22:27:10,672 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) [2022-11-25 22:27:10,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 222 transitions. [2022-11-25 22:27:10,674 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 222 transitions. Word has length 40 [2022-11-25 22:27:10,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:27:10,675 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 222 transitions. [2022-11-25 22:27:10,675 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) [2022-11-25 22:27:10,675 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 222 transitions. [2022-11-25 22:27:10,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-25 22:27:10,677 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:27:10,677 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] [2022-11-25 22:27:10,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691ed4a3-e2ef-4cb6-897b-95b13dec25bf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-25 22:27:10,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691ed4a3-e2ef-4cb6-897b-95b13dec25bf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:27:10,887 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:27:10,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:27:10,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1273911064, now seen corresponding path program 1 times [2022-11-25 22:27:10,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:27:10,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995294149] [2022-11-25 22:27:10,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:27:10,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:27:11,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:27:13,626 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 22:27:13,626 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:27:13,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995294149] [2022-11-25 22:27:13,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995294149] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:27:13,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:27:13,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-25 22:27:13,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474129321] [2022-11-25 22:27:13,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:27:13,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 22:27:13,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:27:13,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 22:27:13,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-25 22:27:13,629 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) [2022-11-25 22:27:15,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:27:15,478 INFO L93 Difference]: Finished difference Result 364 states and 455 transitions. [2022-11-25 22:27:15,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 22:27:15,479 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 [2022-11-25 22:27:15,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:27:15,481 INFO L225 Difference]: With dead ends: 364 [2022-11-25 22:27:15,482 INFO L226 Difference]: Without dead ends: 211 [2022-11-25 22:27:15,483 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 [2022-11-25 22:27:15,484 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 48 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s 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, 1.7s IncrementalHoareTripleChecker+Time [2022-11-25 22:27:15,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 649 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-25 22:27:15,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-11-25 22:27:15,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 194. [2022-11-25 22:27:15,518 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) [2022-11-25 22:27:15,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 240 transitions. [2022-11-25 22:27:15,520 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 240 transitions. Word has length 40 [2022-11-25 22:27:15,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:27:15,521 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 240 transitions. [2022-11-25 22:27:15,521 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) [2022-11-25 22:27:15,521 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 240 transitions. [2022-11-25 22:27:15,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-25 22:27:15,523 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:27:15,523 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] [2022-11-25 22:27:15,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 22:27:15,523 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:27:15,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:27:15,524 INFO L85 PathProgramCache]: Analyzing trace with hash 180781588, now seen corresponding path program 1 times [2022-11-25 22:27:15,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:27:15,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212315591] [2022-11-25 22:27:15,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:27:15,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:27:17,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:27:29,177 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 22:27:29,178 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:27:29,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212315591] [2022-11-25 22:27:29,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212315591] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:27:29,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367962608] [2022-11-25 22:27:29,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:27:29,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:27:29,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691ed4a3-e2ef-4cb6-897b-95b13dec25bf/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:27:29,180 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691ed4a3-e2ef-4cb6-897b-95b13dec25bf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:27:29,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691ed4a3-e2ef-4cb6-897b-95b13dec25bf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 22:27:29,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:27:29,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 2457 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-25 22:27:29,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:27:29,984 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 [2022-11-25 22:27:36,203 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 22:27:36,204 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:27:36,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367962608] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:27:36,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:27:36,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [20] total 32 [2022-11-25 22:27:36,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340031134] [2022-11-25 22:27:36,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:27:36,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 22:27:36,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:27:36,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 22:27:36,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2022-11-25 22:27:36,207 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) [2022-11-25 22:27:38,949 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] [2022-11-25 22:27:41,885 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 22:27:44,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 22:27:46,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 22:27:48,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 22:27:52,218 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 22:27:54,227 WARN L539 Checker$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] [2022-11-25 22:27:56,286 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 22:27:58,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 22:28:00,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 22:28:02,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 22:28:04,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 22:28:06,410 WARN L539 Checker$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] [2022-11-25 22:28:08,714 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 22:28:10,722 WARN L539 Checker$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] [2022-11-25 22:28:11,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:28:11,233 INFO L93 Difference]: Finished difference Result 270 states and 323 transitions. [2022-11-25 22:28:11,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 22:28:11,233 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 [2022-11-25 22:28:11,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:28:11,239 INFO L225 Difference]: With dead ends: 270 [2022-11-25 22:28:11,239 INFO L226 Difference]: Without dead ends: 268 [2022-11-25 22:28:11,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=189, Invalid=1703, Unknown=0, NotChecked=0, Total=1892 [2022-11-25 22:28:11,241 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 208 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 1228 mSolverCounterSat, 128 mSolverCounterUnsat, 15 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.1s 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, 34.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:28:11,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 1016 Invalid, 1371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1228 Invalid, 15 Unknown, 0 Unchecked, 34.3s Time] [2022-11-25 22:28:11,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-11-25 22:28:11,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 249. [2022-11-25 22:28:11,286 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) [2022-11-25 22:28:11,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 297 transitions. [2022-11-25 22:28:11,288 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 297 transitions. Word has length 44 [2022-11-25 22:28:11,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:28:11,289 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 297 transitions. [2022-11-25 22:28:11,289 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) [2022-11-25 22:28:11,289 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 297 transitions. [2022-11-25 22:28:11,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-25 22:28:11,291 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:28:11,291 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] [2022-11-25 22:28:11,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691ed4a3-e2ef-4cb6-897b-95b13dec25bf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 22:28:11,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691ed4a3-e2ef-4cb6-897b-95b13dec25bf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:28:11,507 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:28:11,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:28:11,508 INFO L85 PathProgramCache]: Analyzing trace with hash 255889020, now seen corresponding path program 1 times [2022-11-25 22:28:11,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:28:11,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433595819] [2022-11-25 22:28:11,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:11,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:28:11,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:11,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 22:28:11,902 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:28:11,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433595819] [2022-11-25 22:28:11,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433595819] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:28:11,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:28:11,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 22:28:11,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616206318] [2022-11-25 22:28:11,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:28:11,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 22:28:11,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:28:11,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 22:28:11,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:28:11,906 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) [2022-11-25 22:28:12,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:28:12,505 INFO L93 Difference]: Finished difference Result 280 states and 330 transitions. [2022-11-25 22:28:12,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 22:28:12,506 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 [2022-11-25 22:28:12,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:28:12,509 INFO L225 Difference]: With dead ends: 280 [2022-11-25 22:28:12,510 INFO L226 Difference]: Without dead ends: 241 [2022-11-25 22:28:12,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:28:12,514 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 0 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 22:28:12,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 656 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 22:28:12,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-11-25 22:28:12,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 237. [2022-11-25 22:28:12,576 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) [2022-11-25 22:28:12,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 282 transitions. [2022-11-25 22:28:12,579 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 282 transitions. Word has length 46 [2022-11-25 22:28:12,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:28:12,579 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 282 transitions. [2022-11-25 22:28:12,579 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) [2022-11-25 22:28:12,580 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 282 transitions. [2022-11-25 22:28:12,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-25 22:28:12,593 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:28:12,593 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] [2022-11-25 22:28:12,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 22:28:12,593 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:28:12,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:28:12,594 INFO L85 PathProgramCache]: Analyzing trace with hash -452361234, now seen corresponding path program 1 times [2022-11-25 22:28:12,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:28:12,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133672425] [2022-11-25 22:28:12,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:12,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:28:12,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:13,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 22:28:13,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:28:13,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133672425] [2022-11-25 22:28:13,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133672425] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:28:13,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:28:13,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 22:28:13,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861492965] [2022-11-25 22:28:13,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:28:13,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 22:28:13,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:28:13,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 22:28:13,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:28:13,766 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) [2022-11-25 22:28:15,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:28:15,002 INFO L93 Difference]: Finished difference Result 247 states and 291 transitions. [2022-11-25 22:28:15,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 22:28:15,003 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 [2022-11-25 22:28:15,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:28:15,005 INFO L225 Difference]: With dead ends: 247 [2022-11-25 22:28:15,005 INFO L226 Difference]: Without dead ends: 245 [2022-11-25 22:28:15,005 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 [2022-11-25 22:28:15,006 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 63 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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, 1.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:28:15,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 387 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-25 22:28:15,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-11-25 22:28:15,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2022-11-25 22:28:15,046 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) [2022-11-25 22:28:15,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 288 transitions. [2022-11-25 22:28:15,048 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 288 transitions. Word has length 46 [2022-11-25 22:28:15,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:28:15,049 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 288 transitions. [2022-11-25 22:28:15,049 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) [2022-11-25 22:28:15,049 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 288 transitions. [2022-11-25 22:28:15,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-25 22:28:15,050 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:28:15,051 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] [2022-11-25 22:28:15,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 22:28:15,051 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:28:15,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:28:15,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1055566720, now seen corresponding path program 1 times [2022-11-25 22:28:15,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:28:15,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128844283] [2022-11-25 22:28:15,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:15,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:28:15,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:15,961 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 22:28:15,961 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:28:15,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128844283] [2022-11-25 22:28:15,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128844283] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:28:15,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:28:15,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 22:28:15,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613268577] [2022-11-25 22:28:15,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:28:15,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 22:28:15,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:28:15,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 22:28:15,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:28:15,964 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) [2022-11-25 22:28:17,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:28:17,536 INFO L93 Difference]: Finished difference Result 255 states and 297 transitions. [2022-11-25 22:28:17,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 22:28:17,536 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 [2022-11-25 22:28:17,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:28:17,538 INFO L225 Difference]: With dead ends: 255 [2022-11-25 22:28:17,538 INFO L226 Difference]: Without dead ends: 253 [2022-11-25 22:28:17,539 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 [2022-11-25 22:28:17,539 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 62 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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, 1.5s IncrementalHoareTripleChecker+Time [2022-11-25 22:28:17,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 378 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-25 22:28:17,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-11-25 22:28:17,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2022-11-25 22:28:17,579 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) [2022-11-25 22:28:17,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 294 transitions. [2022-11-25 22:28:17,581 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 294 transitions. Word has length 52 [2022-11-25 22:28:17,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:28:17,582 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 294 transitions. [2022-11-25 22:28:17,582 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) [2022-11-25 22:28:17,583 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 294 transitions. [2022-11-25 22:28:17,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-25 22:28:17,584 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:28:17,584 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] [2022-11-25 22:28:17,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 22:28:17,585 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:28:17,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:28:17,585 INFO L85 PathProgramCache]: Analyzing trace with hash -501670539, now seen corresponding path program 1 times [2022-11-25 22:28:17,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:28:17,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24175864] [2022-11-25 22:28:17,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:17,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:28:18,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:21,691 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 22:28:21,692 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:28:21,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24175864] [2022-11-25 22:28:21,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24175864] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:28:21,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:28:21,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-25 22:28:21,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715958582] [2022-11-25 22:28:21,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:28:21,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 22:28:21,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:28:21,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 22:28:21,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-25 22:28:21,695 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) [2022-11-25 22:28:24,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:28:24,345 INFO L93 Difference]: Finished difference Result 274 states and 321 transitions. [2022-11-25 22:28:24,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 22:28:24,346 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 [2022-11-25 22:28:24,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:28:24,349 INFO L225 Difference]: With dead ends: 274 [2022-11-25 22:28:24,349 INFO L226 Difference]: Without dead ends: 272 [2022-11-25 22:28:24,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-11-25 22:28:24,352 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 85 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 1228 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s 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, 2.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:28:24,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 620 Invalid, 1282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1228 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-25 22:28:24,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-11-25 22:28:24,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 257. [2022-11-25 22:28:24,397 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) [2022-11-25 22:28:24,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 297 transitions. [2022-11-25 22:28:24,399 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 297 transitions. Word has length 54 [2022-11-25 22:28:24,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:28:24,400 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 297 transitions. [2022-11-25 22:28:24,401 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) [2022-11-25 22:28:24,401 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 297 transitions. [2022-11-25 22:28:24,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-25 22:28:24,402 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:28:24,403 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] [2022-11-25 22:28:24,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 22:28:24,403 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:28:24,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:28:24,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1986068748, now seen corresponding path program 1 times [2022-11-25 22:28:24,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:28:24,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303091050] [2022-11-25 22:28:24,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:24,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:28:24,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:26,192 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 22:28:26,192 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:28:26,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303091050] [2022-11-25 22:28:26,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303091050] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:28:26,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:28:26,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 22:28:26,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15735045] [2022-11-25 22:28:26,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:28:26,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 22:28:26,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:28:26,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 22:28:26,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-25 22:28:26,194 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) [2022-11-25 22:28:27,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:28:27,816 INFO L93 Difference]: Finished difference Result 267 states and 306 transitions. [2022-11-25 22:28:27,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 22:28:27,817 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 [2022-11-25 22:28:27,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:28:27,819 INFO L225 Difference]: With dead ends: 267 [2022-11-25 22:28:27,819 INFO L226 Difference]: Without dead ends: 263 [2022-11-25 22:28:27,819 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 [2022-11-25 22:28:27,820 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 65 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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, 1.5s IncrementalHoareTripleChecker+Time [2022-11-25 22:28:27,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 370 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-25 22:28:27,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-11-25 22:28:27,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2022-11-25 22:28:27,864 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) [2022-11-25 22:28:27,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 301 transitions. [2022-11-25 22:28:27,866 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 301 transitions. Word has length 59 [2022-11-25 22:28:27,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:28:27,866 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 301 transitions. [2022-11-25 22:28:27,867 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) [2022-11-25 22:28:27,867 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 301 transitions. [2022-11-25 22:28:27,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-25 22:28:27,868 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:28:27,868 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] [2022-11-25 22:28:27,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 22:28:27,869 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:28:27,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:28:27,869 INFO L85 PathProgramCache]: Analyzing trace with hash 322424277, now seen corresponding path program 1 times [2022-11-25 22:28:27,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:28:27,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606357206] [2022-11-25 22:28:27,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:27,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:28:28,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:30,623 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-25 22:28:30,623 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:28:30,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606357206] [2022-11-25 22:28:30,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606357206] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:28:30,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:28:30,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-25 22:28:30,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8329390] [2022-11-25 22:28:30,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:28:30,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 22:28:30,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:28:30,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 22:28:30,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2022-11-25 22:28:30,625 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) [2022-11-25 22:28:33,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:28:33,949 INFO L93 Difference]: Finished difference Result 286 states and 330 transitions. [2022-11-25 22:28:33,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 22:28:33,950 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 [2022-11-25 22:28:33,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:28:33,952 INFO L225 Difference]: With dead ends: 286 [2022-11-25 22:28:33,952 INFO L226 Difference]: Without dead ends: 284 [2022-11-25 22:28:33,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-11-25 22:28:33,953 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 118 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 1505 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s 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, 3.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:28:33,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 889 Invalid, 1584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1505 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-25 22:28:33,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-11-25 22:28:33,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 267. [2022-11-25 22:28:34,000 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) [2022-11-25 22:28:34,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 304 transitions. [2022-11-25 22:28:34,002 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 304 transitions. Word has length 64 [2022-11-25 22:28:34,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:28:34,002 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 304 transitions. [2022-11-25 22:28:34,002 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) [2022-11-25 22:28:34,003 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 304 transitions. [2022-11-25 22:28:34,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-25 22:28:34,004 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:28:34,004 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] [2022-11-25 22:28:34,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 22:28:34,005 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:28:34,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:28:34,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1272784373, now seen corresponding path program 1 times [2022-11-25 22:28:34,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:28:34,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094928649] [2022-11-25 22:28:34,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:34,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:28:34,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:34,367 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-25 22:28:34,368 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:28:34,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094928649] [2022-11-25 22:28:34,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094928649] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:28:34,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:28:34,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 22:28:34,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991577649] [2022-11-25 22:28:34,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:28:34,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 22:28:34,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:28:34,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 22:28:34,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:28:34,370 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) [2022-11-25 22:28:34,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:28:34,951 INFO L93 Difference]: Finished difference Result 334 states and 388 transitions. [2022-11-25 22:28:34,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:28:34,952 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 [2022-11-25 22:28:34,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:28:34,954 INFO L225 Difference]: With dead ends: 334 [2022-11-25 22:28:34,954 INFO L226 Difference]: Without dead ends: 283 [2022-11-25 22:28:34,954 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 [2022-11-25 22:28:34,958 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 8 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 22:28:34,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 536 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 22:28:34,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-11-25 22:28:35,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 271. [2022-11-25 22:28:35,011 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) [2022-11-25 22:28:35,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 308 transitions. [2022-11-25 22:28:35,015 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 308 transitions. Word has length 66 [2022-11-25 22:28:35,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:28:35,016 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 308 transitions. [2022-11-25 22:28:35,016 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) [2022-11-25 22:28:35,016 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 308 transitions. [2022-11-25 22:28:35,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-25 22:28:35,020 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:28:35,020 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] [2022-11-25 22:28:35,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 22:28:35,020 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:28:35,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:28:35,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1331017075, now seen corresponding path program 1 times [2022-11-25 22:28:35,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:28:35,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857844644] [2022-11-25 22:28:35,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:35,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:28:35,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:35,781 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-25 22:28:35,781 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:28:35,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857844644] [2022-11-25 22:28:35,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857844644] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:28:35,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:28:35,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:28:35,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58708813] [2022-11-25 22:28:35,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:28:35,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:28:35,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:28:35,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:28:35,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:28:35,784 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) [2022-11-25 22:28:36,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:28:36,045 INFO L93 Difference]: Finished difference Result 324 states and 371 transitions. [2022-11-25 22:28:36,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:28:36,046 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 [2022-11-25 22:28:36,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:28:36,047 INFO L225 Difference]: With dead ends: 324 [2022-11-25 22:28:36,048 INFO L226 Difference]: Without dead ends: 263 [2022-11-25 22:28:36,048 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 [2022-11-25 22:28:36,049 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 11 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:28:36,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 222 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:28:36,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-11-25 22:28:36,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2022-11-25 22:28:36,096 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) [2022-11-25 22:28:36,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 297 transitions. [2022-11-25 22:28:36,098 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 297 transitions. Word has length 71 [2022-11-25 22:28:36,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:28:36,098 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 297 transitions. [2022-11-25 22:28:36,099 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) [2022-11-25 22:28:36,099 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 297 transitions. [2022-11-25 22:28:36,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-25 22:28:36,100 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:28:36,100 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] [2022-11-25 22:28:36,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 22:28:36,101 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:28:36,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:28:36,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1772650051, now seen corresponding path program 1 times [2022-11-25 22:28:36,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:28:36,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871761197] [2022-11-25 22:28:36,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:36,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:28:36,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:36,433 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-25 22:28:36,434 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:28:36,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871761197] [2022-11-25 22:28:36,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871761197] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:28:36,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:28:36,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 22:28:36,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112476671] [2022-11-25 22:28:36,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:28:36,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 22:28:36,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:28:36,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 22:28:36,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:28:36,436 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) [2022-11-25 22:28:36,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:28:36,894 INFO L93 Difference]: Finished difference Result 312 states and 357 transitions. [2022-11-25 22:28:36,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 22:28:36,895 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 [2022-11-25 22:28:36,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:28:36,897 INFO L225 Difference]: With dead ends: 312 [2022-11-25 22:28:36,897 INFO L226 Difference]: Without dead ends: 270 [2022-11-25 22:28:36,898 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 [2022-11-25 22:28:36,899 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 [2022-11-25 22:28:36,899 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] [2022-11-25 22:28:36,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-11-25 22:28:36,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 265. [2022-11-25 22:28:36,940 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) [2022-11-25 22:28:36,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 298 transitions. [2022-11-25 22:28:36,942 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 298 transitions. Word has length 70 [2022-11-25 22:28:36,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:28:36,942 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 298 transitions. [2022-11-25 22:28:36,943 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) [2022-11-25 22:28:36,943 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 298 transitions. [2022-11-25 22:28:36,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-25 22:28:36,944 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:28:36,944 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] [2022-11-25 22:28:36,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-25 22:28:36,945 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:28:36,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:28:36,945 INFO L85 PathProgramCache]: Analyzing trace with hash -162484669, now seen corresponding path program 1 times [2022-11-25 22:28:36,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:28:36,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414748835] [2022-11-25 22:28:36,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:36,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:28:38,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:46,652 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-25 22:28:46,652 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:28:46,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414748835] [2022-11-25 22:28:46,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414748835] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:28:46,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487600087] [2022-11-25 22:28:46,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:46,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:28:46,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691ed4a3-e2ef-4cb6-897b-95b13dec25bf/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:28:46,655 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691ed4a3-e2ef-4cb6-897b-95b13dec25bf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:28:46,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691ed4a3-e2ef-4cb6-897b-95b13dec25bf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 22:28:47,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:47,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 2596 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-25 22:28:47,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:28:47,429 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 [2022-11-25 22:28:56,530 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:28:56,530 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 [2022-11-25 22:28:56,592 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:28:56,593 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 [2022-11-25 22:28:56,818 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-25 22:28:56,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:28:59,685 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 76449 disjunctions. This might take some time... [2022-11-25 22:37:36,527 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 76449 disjunctions.