./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_right_trim_pred_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_right_trim_pred_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R --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 Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash f85fffa00ce152c2185c303de3856b218143afacade5a3da3d11c284e86ce457 --- 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 16:41:57,897 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 16:41:57,900 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 16:41:57,942 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 16:41:57,945 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 16:41:57,949 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 16:41:57,953 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 16:41:57,956 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 16:41:57,959 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 16:41:57,965 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 16:41:57,967 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 16:41:57,969 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 16:41:57,969 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 16:41:57,973 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 16:41:57,975 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 16:41:57,977 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 16:41:57,979 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 16:41:57,980 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 16:41:57,982 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 16:41:57,988 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 16:41:57,990 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 16:41:57,992 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 16:41:57,994 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 16:41:57,995 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 16:41:58,006 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 16:41:58,007 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 16:41:58,007 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 16:41:58,009 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 16:41:58,010 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 16:41:58,011 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 16:41:58,013 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 16:41:58,014 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 16:41:58,016 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 16:41:58,017 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 16:41:58,019 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 16:41:58,019 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 16:41:58,020 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 16:41:58,020 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 16:41:58,020 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 16:41:58,021 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 16:41:58,022 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 16:41:58,023 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-25 16:41:58,069 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 16:41:58,069 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 16:41:58,070 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 16:41:58,071 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 16:41:58,071 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 16:41:58,072 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 16:41:58,073 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 16:41:58,073 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 16:41:58,073 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 16:41:58,073 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 16:41:58,074 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 16:41:58,075 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 16:41:58,075 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 16:41:58,075 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 16:41:58,076 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 16:41:58,076 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 16:41:58,076 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 16:41:58,076 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 16:41:58,077 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 16:41:58,077 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 16:41:58,077 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 16:41:58,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 16:41:58,078 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 16:41:58,078 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 16:41:58,078 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 16:41:58,078 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 16:41:58,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 16:41:58,079 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 16:41:58,080 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 16:41:58,080 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 16:41:58,080 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 16:41:58,080 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f85fffa00ce152c2185c303de3856b218143afacade5a3da3d11c284e86ce457 [2022-11-25 16:41:58,399 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 16:41:58,423 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 16:41:58,426 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 16:41:58,427 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 16:41:58,428 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 16:41:58,429 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_right_trim_pred_harness.i [2022-11-25 16:42:01,501 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 16:42:02,057 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 16:42:02,058 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/sv-benchmarks/c/aws-c-common/aws_byte_cursor_right_trim_pred_harness.i [2022-11-25 16:42:02,094 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/data/5861ce419/01b8d338f4a64c36b908c4e4aec964ad/FLAGc6d8869b9 [2022-11-25 16:42:02,113 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/data/5861ce419/01b8d338f4a64c36b908c4e4aec964ad [2022-11-25 16:42:02,116 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 16:42:02,118 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 16:42:02,121 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 16:42:02,121 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 16:42:02,125 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 16:42:02,126 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 04:42:02" (1/1) ... [2022-11-25 16:42:02,127 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41358585 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:02, skipping insertion in model container [2022-11-25 16:42:02,127 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 04:42:02" (1/1) ... [2022-11-25 16:42:02,135 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 16:42:02,264 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 16:42:02,517 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_648fd4c3-79d0-415a-afec-4396013953e6/sv-benchmarks/c/aws-c-common/aws_byte_cursor_right_trim_pred_harness.i[4505,4518] [2022-11-25 16:42:02,526 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_648fd4c3-79d0-415a-afec-4396013953e6/sv-benchmarks/c/aws-c-common/aws_byte_cursor_right_trim_pred_harness.i[4565,4578] [2022-11-25 16:42:03,660 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 16:42:03,661 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 16:42:03,662 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 16:42:03,663 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 16:42:03,664 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 16:42:03,680 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 16:42:03,680 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 16:42:03,682 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 16:42:03,683 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 16:42:03,781 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 16:42:03,781 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 16:42:03,782 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 16:42:03,788 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-11-25 16:42:03,791 WARN L623 FunctionHandler]: Unknown extern function htons [2022-11-25 16:42:03,791 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-11-25 16:42:04,163 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-11-25 16:42:04,164 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-25 16:42:04,173 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-25 16:42:04,174 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-25 16:42:04,180 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-25 16:42:04,182 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-25 16:42:04,183 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-25 16:42:04,184 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-25 16:42:04,191 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-25 16:42:04,192 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-25 16:42:04,192 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-25 16:42:04,434 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-25 16:42:04,513 WARN L623 FunctionHandler]: Unknown extern function memchr [2022-11-25 16:42:04,532 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-25 16:42:04,572 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-25 16:42:04,581 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 16:42:04,582 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 16:42:04,635 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-11-25 16:42:04,653 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 16:42:04,698 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 16:42:04,712 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_648fd4c3-79d0-415a-afec-4396013953e6/sv-benchmarks/c/aws-c-common/aws_byte_cursor_right_trim_pred_harness.i[4505,4518] [2022-11-25 16:42:04,712 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_648fd4c3-79d0-415a-afec-4396013953e6/sv-benchmarks/c/aws-c-common/aws_byte_cursor_right_trim_pred_harness.i[4565,4578] [2022-11-25 16:42:04,782 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 16:42:04,783 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 16:42:04,783 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 16:42:04,784 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 16:42:04,786 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 16:42:04,794 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 16:42:04,795 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 16:42:04,796 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 16:42:04,796 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 16:42:04,811 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 16:42:04,811 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 16:42:04,812 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 16:42:04,816 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-11-25 16:42:04,821 WARN L623 FunctionHandler]: Unknown extern function htons [2022-11-25 16:42:04,821 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-11-25 16:42:04,857 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-11-25 16:42:04,858 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-25 16:42:04,859 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-25 16:42:04,859 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-25 16:42:04,860 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-25 16:42:04,861 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-25 16:42:04,861 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-25 16:42:04,862 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-25 16:42:04,862 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-25 16:42:04,863 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-25 16:42:04,863 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-25 16:42:04,902 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-25 16:42:04,966 WARN L623 FunctionHandler]: Unknown extern function memchr [2022-11-25 16:42:04,976 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-25 16:42:04,993 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-25 16:42:05,006 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 16:42:05,006 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 16:42:05,048 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-11-25 16:42:05,054 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 16:42:05,323 INFO L208 MainTranslator]: Completed translation [2022-11-25 16:42:05,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:05 WrapperNode [2022-11-25 16:42:05,324 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 16:42:05,326 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 16:42:05,326 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 16:42:05,327 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 16:42:05,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:05" (1/1) ... [2022-11-25 16:42:05,447 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:05" (1/1) ... [2022-11-25 16:42:05,511 INFO L138 Inliner]: procedures = 690, calls = 2619, calls flagged for inlining = 60, calls inlined = 8, statements flattened = 799 [2022-11-25 16:42:05,512 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 16:42:05,512 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 16:42:05,513 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 16:42:05,513 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 16:42:05,522 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:05" (1/1) ... [2022-11-25 16:42:05,523 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:05" (1/1) ... [2022-11-25 16:42:05,533 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:05" (1/1) ... [2022-11-25 16:42:05,534 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:05" (1/1) ... [2022-11-25 16:42:05,560 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:05" (1/1) ... [2022-11-25 16:42:05,565 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:05" (1/1) ... [2022-11-25 16:42:05,569 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:05" (1/1) ... [2022-11-25 16:42:05,573 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:05" (1/1) ... [2022-11-25 16:42:05,580 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 16:42:05,581 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 16:42:05,581 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 16:42:05,581 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 16:42:05,582 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:05" (1/1) ... [2022-11-25 16:42:05,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 16:42:05,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:05,620 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 16:42:05,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 16:42:05,695 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2022-11-25 16:42:05,695 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2022-11-25 16:42:05,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 16:42:05,695 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-11-25 16:42:05,696 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-11-25 16:42:05,696 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 16:42:05,696 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-25 16:42:05,696 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-25 16:42:05,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 16:42:05,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 16:42:05,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-25 16:42:05,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 16:42:05,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 16:42:05,697 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-11-25 16:42:05,698 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-11-25 16:42:05,698 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2022-11-25 16:42:05,698 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2022-11-25 16:42:05,698 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-25 16:42:05,698 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-25 16:42:05,698 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 16:42:05,698 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-25 16:42:05,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-25 16:42:05,699 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~~uint8_t~0~TO~int [2022-11-25 16:42:05,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~~uint8_t~0~TO~int [2022-11-25 16:42:05,700 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 16:42:05,700 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_right_trim_pred [2022-11-25 16:42:05,700 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_right_trim_pred [2022-11-25 16:42:05,701 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 16:42:06,035 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 16:42:06,037 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 16:42:07,307 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 16:42:07,314 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 16:42:07,314 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-25 16:42:07,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 04:42:07 BoogieIcfgContainer [2022-11-25 16:42:07,317 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 16:42:07,319 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 16:42:07,320 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 16:42:07,323 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 16:42:07,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 04:42:02" (1/3) ... [2022-11-25 16:42:07,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ccc2f0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 04:42:07, skipping insertion in model container [2022-11-25 16:42:07,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:05" (2/3) ... [2022-11-25 16:42:07,325 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ccc2f0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 04:42:07, skipping insertion in model container [2022-11-25 16:42:07,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 04:42:07" (3/3) ... [2022-11-25 16:42:07,326 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_byte_cursor_right_trim_pred_harness.i [2022-11-25 16:42:07,346 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 16:42:07,346 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 16:42:07,398 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 16:42:07,404 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=PETRI_NET, 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;@7d21806f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 16:42:07,405 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 16:42:07,409 INFO L276 IsEmpty]: Start isEmpty. Operand has 95 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 64 states have internal predecessors, (78), 22 states have call successors, (22), 8 states have call predecessors, (22), 8 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-25 16:42:07,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-25 16:42:07,420 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:42:07,421 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:07,421 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:42:07,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:07,427 INFO L85 PathProgramCache]: Analyzing trace with hash 990555707, now seen corresponding path program 1 times [2022-11-25 16:42:07,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:07,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571406082] [2022-11-25 16:42:07,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:07,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:07,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:08,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 16:42:08,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:08,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 16:42:08,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:08,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-25 16:42:08,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:08,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-25 16:42:08,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:08,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-25 16:42:08,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:08,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-25 16:42:08,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:08,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-25 16:42:08,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:08,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-25 16:42:08,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:08,205 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-25 16:42:08,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:08,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571406082] [2022-11-25 16:42:08,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571406082] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:08,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:42:08,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 16:42:08,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485376099] [2022-11-25 16:42:08,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:08,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 16:42:08,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:08,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 16:42:08,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 16:42:08,274 INFO L87 Difference]: Start difference. First operand has 95 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 64 states have internal predecessors, (78), 22 states have call successors, (22), 8 states have call predecessors, (22), 8 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 16:42:08,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:42:08,336 INFO L93 Difference]: Finished difference Result 186 states and 253 transitions. [2022-11-25 16:42:08,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 16:42:08,339 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2022-11-25 16:42:08,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:42:08,350 INFO L225 Difference]: With dead ends: 186 [2022-11-25 16:42:08,350 INFO L226 Difference]: Without dead ends: 86 [2022-11-25 16:42:08,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 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 16:42:08,363 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:42:08,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 16:42:08,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-25 16:42:08,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-11-25 16:42:08,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 57 states have internal predecessors, (66), 22 states have call successors, (22), 8 states have call predecessors, (22), 7 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-25 16:42:08,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 108 transitions. [2022-11-25 16:42:08,425 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 108 transitions. Word has length 61 [2022-11-25 16:42:08,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:42:08,426 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 108 transitions. [2022-11-25 16:42:08,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 16:42:08,427 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 108 transitions. [2022-11-25 16:42:08,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-25 16:42:08,432 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:42:08,432 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:08,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 16:42:08,433 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:42:08,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:08,434 INFO L85 PathProgramCache]: Analyzing trace with hash -89389740, now seen corresponding path program 1 times [2022-11-25 16:42:08,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:08,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296485836] [2022-11-25 16:42:08,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:08,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:08,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:09,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 16:42:09,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:09,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 16:42:09,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:09,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-25 16:42:09,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:09,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-25 16:42:09,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:09,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-25 16:42:09,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:09,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-25 16:42:09,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:09,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-25 16:42:09,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:09,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-25 16:42:09,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:09,327 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-25 16:42:09,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:09,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296485836] [2022-11-25 16:42:09,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296485836] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:42:09,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518064654] [2022-11-25 16:42:09,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:09,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:09,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:09,335 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:42:09,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 16:42:09,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:09,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 2484 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 16:42:09,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:42:10,224 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-25 16:42:10,224 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:42:10,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518064654] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:10,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 16:42:10,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2022-11-25 16:42:10,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526512532] [2022-11-25 16:42:10,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:10,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 16:42:10,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:10,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 16:42:10,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-25 16:42:10,229 INFO L87 Difference]: Start difference. First operand 86 states and 108 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 16:42:10,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:42:10,445 INFO L93 Difference]: Finished difference Result 155 states and 200 transitions. [2022-11-25 16:42:10,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 16:42:10,447 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 63 [2022-11-25 16:42:10,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:42:10,451 INFO L225 Difference]: With dead ends: 155 [2022-11-25 16:42:10,452 INFO L226 Difference]: Without dead ends: 89 [2022-11-25 16:42:10,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-25 16:42:10,463 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 121 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 16:42:10,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 227 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 16:42:10,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-25 16:42:10,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-11-25 16:42:10,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 60 states have internal predecessors, (68), 22 states have call successors, (22), 8 states have call predecessors, (22), 8 states have return successors, (24), 20 states have call predecessors, (24), 20 states have call successors, (24) [2022-11-25 16:42:10,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 114 transitions. [2022-11-25 16:42:10,488 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 114 transitions. Word has length 63 [2022-11-25 16:42:10,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:42:10,493 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 114 transitions. [2022-11-25 16:42:10,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 16:42:10,493 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 114 transitions. [2022-11-25 16:42:10,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-25 16:42:10,501 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:42:10,501 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:10,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 16:42:10,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:10,711 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:42:10,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:10,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1896344881, now seen corresponding path program 1 times [2022-11-25 16:42:10,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:10,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935187433] [2022-11-25 16:42:10,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:10,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:10,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:11,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 16:42:11,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:11,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 16:42:11,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:11,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-25 16:42:11,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:11,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 16:42:11,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:11,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-25 16:42:11,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:11,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-11-25 16:42:11,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:11,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-25 16:42:11,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:11,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-11-25 16:42:11,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:11,553 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-25 16:42:11,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:11,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935187433] [2022-11-25 16:42:11,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935187433] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:42:11,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046803992] [2022-11-25 16:42:11,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:11,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:11,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:11,556 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:42:11,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 16:42:12,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:12,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 2489 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 16:42:12,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:42:12,325 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 16:42:12,325 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:42:12,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046803992] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:12,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 16:42:12,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2022-11-25 16:42:12,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157785701] [2022-11-25 16:42:12,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:12,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 16:42:12,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:12,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 16:42:12,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-11-25 16:42:12,330 INFO L87 Difference]: Start difference. First operand 89 states and 114 transitions. Second operand has 8 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-25 16:42:12,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:42:12,601 INFO L93 Difference]: Finished difference Result 148 states and 189 transitions. [2022-11-25 16:42:12,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 16:42:12,602 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 65 [2022-11-25 16:42:12,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:42:12,605 INFO L225 Difference]: With dead ends: 148 [2022-11-25 16:42:12,605 INFO L226 Difference]: Without dead ends: 89 [2022-11-25 16:42:12,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-11-25 16:42:12,606 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 132 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 16:42:12,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 333 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 16:42:12,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-25 16:42:12,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-11-25 16:42:12,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 60 states have internal predecessors, (68), 22 states have call successors, (22), 8 states have call predecessors, (22), 8 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-11-25 16:42:12,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 112 transitions. [2022-11-25 16:42:12,617 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 112 transitions. Word has length 65 [2022-11-25 16:42:12,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:42:12,618 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 112 transitions. [2022-11-25 16:42:12,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-25 16:42:12,618 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 112 transitions. [2022-11-25 16:42:12,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-25 16:42:12,626 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:42:12,626 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:12,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 16:42:12,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:12,842 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:42:12,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:12,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1793788399, now seen corresponding path program 1 times [2022-11-25 16:42:12,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:12,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588574941] [2022-11-25 16:42:12,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:12,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:13,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:13,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 16:42:13,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:13,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 16:42:13,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:13,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-25 16:42:13,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:13,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 16:42:13,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:14,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-25 16:42:14,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:14,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-25 16:42:14,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:14,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-11-25 16:42:14,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:14,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-25 16:42:14,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:14,155 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-25 16:42:14,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:14,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588574941] [2022-11-25 16:42:14,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588574941] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:14,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:42:14,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 16:42:14,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996482661] [2022-11-25 16:42:14,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:14,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 16:42:14,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:14,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 16:42:14,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-25 16:42:14,160 INFO L87 Difference]: Start difference. First operand 89 states and 112 transitions. Second operand has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-11-25 16:42:14,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:42:14,261 INFO L93 Difference]: Finished difference Result 101 states and 129 transitions. [2022-11-25 16:42:14,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 16:42:14,262 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 69 [2022-11-25 16:42:14,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:42:14,264 INFO L225 Difference]: With dead ends: 101 [2022-11-25 16:42:14,264 INFO L226 Difference]: Without dead ends: 99 [2022-11-25 16:42:14,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-25 16:42:14,266 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 17 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 16:42:14,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 717 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 16:42:14,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-25 16:42:14,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2022-11-25 16:42:14,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 64 states have (on average 1.15625) internal successors, (74), 67 states have internal predecessors, (74), 23 states have call successors, (23), 9 states have call predecessors, (23), 10 states have return successors, (29), 21 states have call predecessors, (29), 21 states have call successors, (29) [2022-11-25 16:42:14,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 126 transitions. [2022-11-25 16:42:14,281 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 126 transitions. Word has length 69 [2022-11-25 16:42:14,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:42:14,282 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 126 transitions. [2022-11-25 16:42:14,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-11-25 16:42:14,282 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 126 transitions. [2022-11-25 16:42:14,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-25 16:42:14,284 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:42:14,284 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:14,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 16:42:14,285 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:42:14,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:14,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1240513463, now seen corresponding path program 1 times [2022-11-25 16:42:14,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:14,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145469011] [2022-11-25 16:42:14,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:14,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:14,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:16,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 16:42:16,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:16,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 16:42:16,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:16,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-25 16:42:16,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:16,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 16:42:16,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:16,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-25 16:42:16,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:16,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-25 16:42:16,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:16,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-11-25 16:42:16,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:16,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-25 16:42:16,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:17,065 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-25 16:42:17,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:17,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145469011] [2022-11-25 16:42:17,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145469011] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:42:17,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848969855] [2022-11-25 16:42:17,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:17,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:17,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:17,068 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:42:17,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 16:42:17,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:17,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 2511 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-25 16:42:17,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:42:17,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 16:42:19,141 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-25 16:42:19,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:42:19,685 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-25 16:42:19,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848969855] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:42:19,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:42:19,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 11] total 25 [2022-11-25 16:42:19,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660863369] [2022-11-25 16:42:19,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:42:19,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 16:42:19,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:19,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 16:42:19,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-11-25 16:42:19,689 INFO L87 Difference]: Start difference. First operand 98 states and 126 transitions. Second operand has 25 states, 25 states have (on average 3.56) internal successors, (89), 23 states have internal predecessors, (89), 8 states have call successors, (19), 5 states have call predecessors, (19), 5 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2022-11-25 16:42:23,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:42:23,287 INFO L93 Difference]: Finished difference Result 285 states and 383 transitions. [2022-11-25 16:42:23,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-25 16:42:23,288 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.56) internal successors, (89), 23 states have internal predecessors, (89), 8 states have call successors, (19), 5 states have call predecessors, (19), 5 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) Word has length 73 [2022-11-25 16:42:23,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:42:23,291 INFO L225 Difference]: With dead ends: 285 [2022-11-25 16:42:23,291 INFO L226 Difference]: Without dead ends: 207 [2022-11-25 16:42:23,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 140 SyntacticMatches, 12 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=247, Invalid=1393, Unknown=0, NotChecked=0, Total=1640 [2022-11-25 16:42:23,293 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 191 mSDsluCounter, 855 mSDsCounter, 0 mSdLazyCounter, 1476 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 1583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-25 16:42:23,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 959 Invalid, 1583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1476 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-25 16:42:23,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-11-25 16:42:23,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 192. [2022-11-25 16:42:23,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 125 states have (on average 1.16) internal successors, (145), 129 states have internal predecessors, (145), 47 states have call successors, (47), 17 states have call predecessors, (47), 19 states have return successors, (60), 45 states have call predecessors, (60), 43 states have call successors, (60) [2022-11-25 16:42:23,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 252 transitions. [2022-11-25 16:42:23,359 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 252 transitions. Word has length 73 [2022-11-25 16:42:23,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:42:23,361 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 252 transitions. [2022-11-25 16:42:23,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.56) internal successors, (89), 23 states have internal predecessors, (89), 8 states have call successors, (19), 5 states have call predecessors, (19), 5 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2022-11-25 16:42:23,362 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 252 transitions. [2022-11-25 16:42:23,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-25 16:42:23,365 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:42:23,365 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 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] [2022-11-25 16:42:23,376 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-25 16:42:23,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:23,576 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:42:23,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:23,577 INFO L85 PathProgramCache]: Analyzing trace with hash 754747503, now seen corresponding path program 1 times [2022-11-25 16:42:23,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:23,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001113009] [2022-11-25 16:42:23,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:23,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:23,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:23,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 16:42:23,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:23,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 16:42:23,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:23,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-25 16:42:23,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:23,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-25 16:42:23,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:23,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-25 16:42:23,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:23,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-25 16:42:23,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:23,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-25 16:42:23,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:23,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-25 16:42:23,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:23,879 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-25 16:42:23,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:23,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001113009] [2022-11-25 16:42:23,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001113009] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:23,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:42:23,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:42:23,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78371915] [2022-11-25 16:42:23,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:23,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:42:23,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:23,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:42:23,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:42:23,883 INFO L87 Difference]: Start difference. First operand 192 states and 252 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 16:42:23,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:42:23,919 INFO L93 Difference]: Finished difference Result 289 states and 377 transitions. [2022-11-25 16:42:23,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:42:23,920 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 80 [2022-11-25 16:42:23,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:42:23,922 INFO L225 Difference]: With dead ends: 289 [2022-11-25 16:42:23,923 INFO L226 Difference]: Without dead ends: 195 [2022-11-25 16:42:23,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 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 16:42:23,924 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 0 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:42:23,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 209 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 16:42:23,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-11-25 16:42:23,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2022-11-25 16:42:23,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 128 states have (on average 1.15625) internal successors, (148), 132 states have internal predecessors, (148), 47 states have call successors, (47), 17 states have call predecessors, (47), 19 states have return successors, (60), 45 states have call predecessors, (60), 43 states have call successors, (60) [2022-11-25 16:42:23,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 255 transitions. [2022-11-25 16:42:23,956 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 255 transitions. Word has length 80 [2022-11-25 16:42:23,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:42:23,957 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 255 transitions. [2022-11-25 16:42:23,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 16:42:23,957 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 255 transitions. [2022-11-25 16:42:23,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-25 16:42:23,959 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:42:23,959 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:23,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 16:42:23,959 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:42:23,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:23,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1625051706, now seen corresponding path program 1 times [2022-11-25 16:42:23,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:23,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970733233] [2022-11-25 16:42:23,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:23,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:24,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:24,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 16:42:24,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:24,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 16:42:24,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:24,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-25 16:42:24,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:24,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 16:42:24,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:24,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-25 16:42:24,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:24,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-25 16:42:24,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:24,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-11-25 16:42:24,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:24,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-25 16:42:24,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:24,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-25 16:42:24,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:24,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-25 16:42:24,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:24,510 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-25 16:42:24,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:24,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970733233] [2022-11-25 16:42:24,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970733233] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:24,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:42:24,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 16:42:24,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778059669] [2022-11-25 16:42:24,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:24,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 16:42:24,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:24,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 16:42:24,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 16:42:24,514 INFO L87 Difference]: Start difference. First operand 195 states and 255 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-25 16:42:24,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:42:24,570 INFO L93 Difference]: Finished difference Result 286 states and 368 transitions. [2022-11-25 16:42:24,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 16:42:24,571 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 81 [2022-11-25 16:42:24,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:42:24,574 INFO L225 Difference]: With dead ends: 286 [2022-11-25 16:42:24,574 INFO L226 Difference]: Without dead ends: 195 [2022-11-25 16:42:24,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 16:42:24,575 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 15 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:42:24,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 283 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 16:42:24,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-11-25 16:42:24,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2022-11-25 16:42:24,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 128 states have (on average 1.15625) internal successors, (148), 132 states have internal predecessors, (148), 47 states have call successors, (47), 17 states have call predecessors, (47), 19 states have return successors, (57), 45 states have call predecessors, (57), 43 states have call successors, (57) [2022-11-25 16:42:24,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 252 transitions. [2022-11-25 16:42:24,604 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 252 transitions. Word has length 81 [2022-11-25 16:42:24,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:42:24,605 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 252 transitions. [2022-11-25 16:42:24,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-25 16:42:24,605 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 252 transitions. [2022-11-25 16:42:24,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-25 16:42:24,607 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:42:24,607 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:24,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 16:42:24,607 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:42:24,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:24,608 INFO L85 PathProgramCache]: Analyzing trace with hash -442406659, now seen corresponding path program 1 times [2022-11-25 16:42:24,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:24,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762618283] [2022-11-25 16:42:24,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:24,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:24,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:26,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 16:42:26,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:26,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 16:42:26,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:26,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-25 16:42:26,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:26,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 16:42:26,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:26,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-25 16:42:26,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:26,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-25 16:42:26,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:26,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-11-25 16:42:26,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:26,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-11-25 16:42:26,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:26,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-11-25 16:42:26,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:26,867 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-25 16:42:26,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:26,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762618283] [2022-11-25 16:42:26,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762618283] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:42:26,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155600025] [2022-11-25 16:42:26,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:26,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:26,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:26,871 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:42:26,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 16:42:27,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:27,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 2562 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-25 16:42:27,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:42:27,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 16:42:28,504 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-25 16:42:28,505 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 55 treesize of output 31 [2022-11-25 16:42:28,529 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-25 16:42:28,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:42:28,810 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-25 16:42:28,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155600025] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:42:28,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:42:28,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 10] total 20 [2022-11-25 16:42:28,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454345801] [2022-11-25 16:42:28,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:42:28,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 16:42:28,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:28,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 16:42:28,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-11-25 16:42:28,814 INFO L87 Difference]: Start difference. First operand 195 states and 252 transitions. Second operand has 20 states, 20 states have (on average 4.45) internal successors, (89), 18 states have internal predecessors, (89), 8 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-11-25 16:42:31,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:42:31,218 INFO L93 Difference]: Finished difference Result 342 states and 444 transitions. [2022-11-25 16:42:31,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-25 16:42:31,219 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.45) internal successors, (89), 18 states have internal predecessors, (89), 8 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) Word has length 82 [2022-11-25 16:42:31,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:42:31,221 INFO L225 Difference]: With dead ends: 342 [2022-11-25 16:42:31,221 INFO L226 Difference]: Without dead ends: 207 [2022-11-25 16:42:31,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 167 SyntacticMatches, 11 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=213, Invalid=1269, Unknown=0, NotChecked=0, Total=1482 [2022-11-25 16:42:31,223 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 178 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 1113 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 876 SdHoareTripleChecker+Invalid, 1222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-25 16:42:31,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 876 Invalid, 1222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1113 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-25 16:42:31,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-11-25 16:42:31,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 185. [2022-11-25 16:42:31,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 121 states have (on average 1.1322314049586777) internal successors, (137), 125 states have internal predecessors, (137), 45 states have call successors, (45), 16 states have call predecessors, (45), 18 states have return successors, (52), 43 states have call predecessors, (52), 41 states have call successors, (52) [2022-11-25 16:42:31,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 234 transitions. [2022-11-25 16:42:31,259 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 234 transitions. Word has length 82 [2022-11-25 16:42:31,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:42:31,261 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 234 transitions. [2022-11-25 16:42:31,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.45) internal successors, (89), 18 states have internal predecessors, (89), 8 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-11-25 16:42:31,262 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 234 transitions. [2022-11-25 16:42:31,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-25 16:42:31,263 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:42:31,263 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:31,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 16:42:31,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:31,480 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:42:31,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:31,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1702906197, now seen corresponding path program 1 times [2022-11-25 16:42:31,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:31,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145191913] [2022-11-25 16:42:31,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:31,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:31,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:32,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 16:42:32,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:32,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 16:42:32,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:32,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-25 16:42:32,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:32,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 16:42:32,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:32,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-25 16:42:32,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:32,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-25 16:42:32,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:32,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-11-25 16:42:32,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:32,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-25 16:42:32,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:32,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-25 16:42:32,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:32,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-25 16:42:32,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:32,364 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-25 16:42:32,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:32,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145191913] [2022-11-25 16:42:32,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145191913] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:32,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:42:32,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 16:42:32,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137081731] [2022-11-25 16:42:32,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:32,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 16:42:32,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:32,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 16:42:32,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-25 16:42:32,368 INFO L87 Difference]: Start difference. First operand 185 states and 234 transitions. Second operand has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-25 16:42:32,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:42:32,483 INFO L93 Difference]: Finished difference Result 197 states and 246 transitions. [2022-11-25 16:42:32,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 16:42:32,484 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 83 [2022-11-25 16:42:32,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:42:32,486 INFO L225 Difference]: With dead ends: 197 [2022-11-25 16:42:32,487 INFO L226 Difference]: Without dead ends: 195 [2022-11-25 16:42:32,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-25 16:42:32,490 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 17 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 16:42:32,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 725 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 16:42:32,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-11-25 16:42:32,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2022-11-25 16:42:32,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 127 states have (on average 1.125984251968504) internal successors, (143), 131 states have internal predecessors, (143), 46 states have call successors, (46), 18 states have call predecessors, (46), 20 states have return successors, (53), 44 states have call predecessors, (53), 42 states have call successors, (53) [2022-11-25 16:42:32,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 242 transitions. [2022-11-25 16:42:32,526 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 242 transitions. Word has length 83 [2022-11-25 16:42:32,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:42:32,527 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 242 transitions. [2022-11-25 16:42:32,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-25 16:42:32,528 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 242 transitions. [2022-11-25 16:42:32,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-25 16:42:32,529 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:42:32,529 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:32,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 16:42:32,530 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:42:32,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:32,530 INFO L85 PathProgramCache]: Analyzing trace with hash -2069482329, now seen corresponding path program 1 times [2022-11-25 16:42:32,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:32,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973803285] [2022-11-25 16:42:32,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:32,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:32,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:33,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 16:42:33,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:33,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 16:42:33,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:33,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-25 16:42:33,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:33,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-25 16:42:33,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:33,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-25 16:42:33,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:33,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-25 16:42:33,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:33,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-11-25 16:42:33,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:33,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-25 16:42:33,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:33,635 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-25 16:42:33,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:33,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973803285] [2022-11-25 16:42:33,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973803285] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:42:33,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065568696] [2022-11-25 16:42:33,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:33,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:33,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:33,639 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:42:33,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 16:42:34,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:34,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 2535 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 16:42:34,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:42:34,303 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 16:42:34,303 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:42:34,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065568696] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:34,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 16:42:34,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 10 [2022-11-25 16:42:34,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579704634] [2022-11-25 16:42:34,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:34,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 16:42:34,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:34,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 16:42:34,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-25 16:42:34,308 INFO L87 Difference]: Start difference. First operand 194 states and 242 transitions. Second operand has 9 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-25 16:42:34,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:42:34,514 INFO L93 Difference]: Finished difference Result 350 states and 439 transitions. [2022-11-25 16:42:34,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 16:42:34,515 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 81 [2022-11-25 16:42:34,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:42:34,517 INFO L225 Difference]: With dead ends: 350 [2022-11-25 16:42:34,517 INFO L226 Difference]: Without dead ends: 204 [2022-11-25 16:42:34,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-11-25 16:42:34,519 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 13 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 16:42:34,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 787 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 16:42:34,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-11-25 16:42:34,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 199. [2022-11-25 16:42:34,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 131 states have (on average 1.1221374045801527) internal successors, (147), 136 states have internal predecessors, (147), 46 states have call successors, (46), 18 states have call predecessors, (46), 21 states have return successors, (58), 44 states have call predecessors, (58), 42 states have call successors, (58) [2022-11-25 16:42:34,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 251 transitions. [2022-11-25 16:42:34,556 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 251 transitions. Word has length 81 [2022-11-25 16:42:34,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:42:34,556 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 251 transitions. [2022-11-25 16:42:34,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-25 16:42:34,557 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 251 transitions. [2022-11-25 16:42:34,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-25 16:42:34,558 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:42:34,559 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:34,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 16:42:34,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 16:42:34,769 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:42:34,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:34,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1271029248, now seen corresponding path program 1 times [2022-11-25 16:42:34,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:34,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585013748] [2022-11-25 16:42:34,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:34,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:34,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:35,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 16:42:35,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:35,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 16:42:35,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:35,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-25 16:42:35,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:35,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-25 16:42:35,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:35,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-11-25 16:42:35,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:35,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-25 16:42:35,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:35,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-11-25 16:42:35,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:35,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-25 16:42:35,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:35,999 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-25 16:42:35,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:35,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585013748] [2022-11-25 16:42:36,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585013748] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:42:36,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159418003] [2022-11-25 16:42:36,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:36,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:36,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:36,002 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:42:36,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 16:42:36,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:36,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 2545 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 16:42:36,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:42:36,657 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 16:42:36,658 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:42:36,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159418003] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:36,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 16:42:36,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 10 [2022-11-25 16:42:36,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122339244] [2022-11-25 16:42:36,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:36,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 16:42:36,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:36,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 16:42:36,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-25 16:42:36,663 INFO L87 Difference]: Start difference. First operand 199 states and 251 transitions. Second operand has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-25 16:42:36,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:42:36,829 INFO L93 Difference]: Finished difference Result 317 states and 397 transitions. [2022-11-25 16:42:36,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 16:42:36,830 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 83 [2022-11-25 16:42:36,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:42:36,831 INFO L225 Difference]: With dead ends: 317 [2022-11-25 16:42:36,832 INFO L226 Difference]: Without dead ends: 204 [2022-11-25 16:42:36,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-11-25 16:42:36,833 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 13 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 16:42:36,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 781 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 16:42:36,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-11-25 16:42:36,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 199. [2022-11-25 16:42:36,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 131 states have (on average 1.1221374045801527) internal successors, (147), 136 states have internal predecessors, (147), 46 states have call successors, (46), 18 states have call predecessors, (46), 21 states have return successors, (57), 44 states have call predecessors, (57), 42 states have call successors, (57) [2022-11-25 16:42:36,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 250 transitions. [2022-11-25 16:42:36,860 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 250 transitions. Word has length 83 [2022-11-25 16:42:36,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:42:36,860 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 250 transitions. [2022-11-25 16:42:36,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-25 16:42:36,861 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 250 transitions. [2022-11-25 16:42:36,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-25 16:42:36,862 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:42:36,862 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 16:42:36,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 16:42:37,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-25 16:42:37,073 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:42:37,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:37,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1900291175, now seen corresponding path program 2 times [2022-11-25 16:42:37,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:37,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256683758] [2022-11-25 16:42:37,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:37,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:37,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:39,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 16:42:39,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:39,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 16:42:39,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:39,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-25 16:42:39,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:39,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-25 16:42:39,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:39,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-11-25 16:42:39,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:39,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-25 16:42:39,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:39,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-25 16:42:39,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:39,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-25 16:42:39,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:39,471 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-25 16:42:39,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:39,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256683758] [2022-11-25 16:42:39,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256683758] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:42:39,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802862123] [2022-11-25 16:42:39,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 16:42:39,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:39,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:39,475 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:42:39,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 16:42:39,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 16:42:39,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:42:40,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 2322 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 16:42:40,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:42:40,594 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-25 16:42:40,594 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:42:40,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802862123] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:40,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 16:42:40,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 17 [2022-11-25 16:42:40,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438058142] [2022-11-25 16:42:40,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:40,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 16:42:40,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:40,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 16:42:40,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2022-11-25 16:42:40,597 INFO L87 Difference]: Start difference. First operand 199 states and 250 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 16:42:42,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:42:44,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:42:46,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:42:47,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:42:50,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:42:50,528 INFO L93 Difference]: Finished difference Result 402 states and 508 transitions. [2022-11-25 16:42:50,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 16:42:50,529 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 85 [2022-11-25 16:42:50,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:42:50,531 INFO L225 Difference]: With dead ends: 402 [2022-11-25 16:42:50,531 INFO L226 Difference]: Without dead ends: 313 [2022-11-25 16:42:50,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-11-25 16:42:50,533 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 104 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 18 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:42:50,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 448 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 328 Invalid, 1 Unknown, 0 Unchecked, 9.0s Time] [2022-11-25 16:42:50,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-11-25 16:42:50,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 292. [2022-11-25 16:42:50,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 198 states have (on average 1.1464646464646464) internal successors, (227), 206 states have internal predecessors, (227), 61 states have call successors, (61), 28 states have call predecessors, (61), 32 states have return successors, (73), 57 states have call predecessors, (73), 53 states have call successors, (73) [2022-11-25 16:42:50,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 361 transitions. [2022-11-25 16:42:50,576 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 361 transitions. Word has length 85 [2022-11-25 16:42:50,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:42:50,576 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 361 transitions. [2022-11-25 16:42:50,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 16:42:50,577 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 361 transitions. [2022-11-25 16:42:50,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-25 16:42:50,578 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:42:50,579 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-25 16:42:50,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 16:42:50,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 16:42:50,789 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:42:50,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:50,790 INFO L85 PathProgramCache]: Analyzing trace with hash 904354819, now seen corresponding path program 1 times [2022-11-25 16:42:50,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:50,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746907379] [2022-11-25 16:42:50,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:50,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:51,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:52,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 16:42:52,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:52,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 16:42:52,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:52,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-25 16:42:52,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:53,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-25 16:42:53,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:53,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-11-25 16:42:53,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:53,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-25 16:42:53,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:53,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-25 16:42:53,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:53,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-25 16:42:53,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:53,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-25 16:42:53,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:53,955 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-25 16:42:53,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:53,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746907379] [2022-11-25 16:42:53,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746907379] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:42:53,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269937880] [2022-11-25 16:42:53,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:53,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:53,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:53,959 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:42:53,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 16:42:54,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:54,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 2585 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-25 16:42:54,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:42:55,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2022-11-25 16:42:57,828 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 42 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:42:57,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:42:59,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-25 16:42:59,784 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-25 16:43:00,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-11-25 16:43:00,842 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-25 16:43:00,843 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 19 treesize of output 18 [2022-11-25 16:43:01,083 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-25 16:43:01,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269937880] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:43:01,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:43:01,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 15] total 39 [2022-11-25 16:43:01,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248036724] [2022-11-25 16:43:01,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:43:01,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-25 16:43:01,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:01,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-25 16:43:01,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1345, Unknown=0, NotChecked=0, Total=1482 [2022-11-25 16:43:01,088 INFO L87 Difference]: Start difference. First operand 292 states and 361 transitions. Second operand has 39 states, 37 states have (on average 3.972972972972973) internal successors, (147), 34 states have internal predecessors, (147), 11 states have call successors, (27), 7 states have call predecessors, (27), 9 states have return successors, (23), 7 states have call predecessors, (23), 10 states have call successors, (23) [2022-11-25 16:43:14,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:43:16,893 WARN L539 Checker$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 16:43:18,964 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:43:23,961 WARN L539 Checker$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 16:43:26,152 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:43:29,147 WARN L539 Checker$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 16:43:34,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:43:34,635 INFO L93 Difference]: Finished difference Result 842 states and 1022 transitions. [2022-11-25 16:43:34,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-25 16:43:34,637 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 3.972972972972973) internal successors, (147), 34 states have internal predecessors, (147), 11 states have call successors, (27), 7 states have call predecessors, (27), 9 states have return successors, (23), 7 states have call predecessors, (23), 10 states have call successors, (23) Word has length 91 [2022-11-25 16:43:34,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:43:34,640 INFO L225 Difference]: With dead ends: 842 [2022-11-25 16:43:34,641 INFO L226 Difference]: Without dead ends: 571 [2022-11-25 16:43:34,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 181 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1917 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=1167, Invalid=5805, Unknown=0, NotChecked=0, Total=6972 [2022-11-25 16:43:34,646 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 643 mSDsluCounter, 1487 mSDsCounter, 0 mSdLazyCounter, 2965 mSolverCounterSat, 292 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 1591 SdHoareTripleChecker+Invalid, 3263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 2965 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:43:34,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [649 Valid, 1591 Invalid, 3263 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [292 Valid, 2965 Invalid, 6 Unknown, 0 Unchecked, 23.0s Time] [2022-11-25 16:43:34,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-11-25 16:43:34,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 461. [2022-11-25 16:43:34,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 323 states have (on average 1.1362229102167183) internal successors, (367), 334 states have internal predecessors, (367), 86 states have call successors, (86), 47 states have call predecessors, (86), 51 states have return successors, (96), 79 states have call predecessors, (96), 76 states have call successors, (96) [2022-11-25 16:43:34,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 549 transitions. [2022-11-25 16:43:34,720 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 549 transitions. Word has length 91 [2022-11-25 16:43:34,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:43:34,721 INFO L495 AbstractCegarLoop]: Abstraction has 461 states and 549 transitions. [2022-11-25 16:43:34,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 3.972972972972973) internal successors, (147), 34 states have internal predecessors, (147), 11 states have call successors, (27), 7 states have call predecessors, (27), 9 states have return successors, (23), 7 states have call predecessors, (23), 10 states have call successors, (23) [2022-11-25 16:43:34,721 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 549 transitions. [2022-11-25 16:43:34,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-25 16:43:34,723 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:43:34,723 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 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, 1, 1, 1, 1] [2022-11-25 16:43:34,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 16:43:34,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 16:43:34,933 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:43:34,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:34,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1386307521, now seen corresponding path program 1 times [2022-11-25 16:43:34,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:34,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770323583] [2022-11-25 16:43:34,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:34,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:35,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:35,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 16:43:35,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:35,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 16:43:35,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:35,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-25 16:43:35,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:35,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 16:43:35,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:35,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-25 16:43:35,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:35,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:43:35,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:35,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 16:43:35,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:35,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-25 16:43:35,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:35,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 16:43:35,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:35,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-25 16:43:35,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:35,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-25 16:43:35,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:35,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-25 16:43:35,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:35,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-11-25 16:43:35,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:36,171 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-25 16:43:36,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:36,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770323583] [2022-11-25 16:43:36,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770323583] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:43:36,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:43:36,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-25 16:43:36,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275234546] [2022-11-25 16:43:36,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:43:36,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 16:43:36,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:36,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 16:43:36,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-25 16:43:36,174 INFO L87 Difference]: Start difference. First operand 461 states and 549 transitions. Second operand has 9 states, 8 states have (on average 5.125) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2022-11-25 16:43:38,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:43:38,151 INFO L93 Difference]: Finished difference Result 489 states and 579 transitions. [2022-11-25 16:43:38,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 16:43:38,152 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.125) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 100 [2022-11-25 16:43:38,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:43:38,155 INFO L225 Difference]: With dead ends: 489 [2022-11-25 16:43:38,155 INFO L226 Difference]: Without dead ends: 487 [2022-11-25 16:43:38,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-11-25 16:43:38,157 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 56 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-25 16:43:38,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 403 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-25 16:43:38,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2022-11-25 16:43:38,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 480. [2022-11-25 16:43:38,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 335 states have (on average 1.1313432835820896) internal successors, (379), 346 states have internal predecessors, (379), 89 states have call successors, (89), 51 states have call predecessors, (89), 55 states have return successors, (99), 82 states have call predecessors, (99), 79 states have call successors, (99) [2022-11-25 16:43:38,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 567 transitions. [2022-11-25 16:43:38,231 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 567 transitions. Word has length 100 [2022-11-25 16:43:38,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:43:38,232 INFO L495 AbstractCegarLoop]: Abstraction has 480 states and 567 transitions. [2022-11-25 16:43:38,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.125) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2022-11-25 16:43:38,232 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 567 transitions. [2022-11-25 16:43:38,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-25 16:43:38,234 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:43:38,234 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:43:38,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-25 16:43:38,235 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:43:38,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:38,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1690843138, now seen corresponding path program 1 times [2022-11-25 16:43:38,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:38,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711403639] [2022-11-25 16:43:38,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:38,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:38,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:42,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 16:43:42,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:42,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 16:43:42,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:42,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-25 16:43:42,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:42,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:43:42,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:42,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-25 16:43:42,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:42,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-25 16:43:42,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:42,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-25 16:43:42,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:42,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-11-25 16:43:42,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:42,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-11-25 16:43:42,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:43,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-25 16:43:43,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:43,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-11-25 16:43:43,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:43,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-11-25 16:43:43,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:43,700 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 32 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-25 16:43:43,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:43,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711403639] [2022-11-25 16:43:43,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711403639] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:43:43,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729728224] [2022-11-25 16:43:43,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:43,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:43:43,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:43:43,707 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:43:43,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 16:43:44,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:44,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 2667 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-25 16:43:44,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:43:44,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 16:43:44,837 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-25 16:43:44,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 9 [2022-11-25 16:43:45,246 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 11 treesize of output 7 [2022-11-25 16:43:46,485 INFO L321 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2022-11-25 16:43:46,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2022-11-25 16:43:46,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-11-25 16:43:49,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-11-25 16:44:01,326 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 30 proven. 52 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-25 16:44:01,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:44:04,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729728224] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:44:04,923 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:44:04,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 32 [2022-11-25 16:44:04,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945355676] [2022-11-25 16:44:04,923 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 16:44:04,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-25 16:44:04,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:44:04,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-25 16:44:04,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1394, Unknown=10, NotChecked=0, Total=1560 [2022-11-25 16:44:04,926 INFO L87 Difference]: Start difference. First operand 480 states and 567 transitions. Second operand has 32 states, 31 states have (on average 3.7096774193548385) internal successors, (115), 27 states have internal predecessors, (115), 11 states have call successors, (25), 8 states have call predecessors, (25), 8 states have return successors, (23), 12 states have call predecessors, (23), 9 states have call successors, (23) [2022-11-25 16:44:07,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:44:10,565 WARN L539 Checker$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 16:44:13,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:44:15,774 WARN L539 Checker$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 16:44:24,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:44:27,233 WARN L539 Checker$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 16:44:32,124 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 16:44:34,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:44:34,158 INFO L93 Difference]: Finished difference Result 1126 states and 1309 transitions. [2022-11-25 16:44:34,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-25 16:44:34,160 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.7096774193548385) internal successors, (115), 27 states have internal predecessors, (115), 11 states have call successors, (25), 8 states have call predecessors, (25), 8 states have return successors, (23), 12 states have call predecessors, (23), 9 states have call successors, (23) Word has length 109 [2022-11-25 16:44:34,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:44:34,165 INFO L225 Difference]: With dead ends: 1126 [2022-11-25 16:44:34,166 INFO L226 Difference]: Without dead ends: 907 [2022-11-25 16:44:34,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 171 SyntacticMatches, 18 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2089 ImplicationChecksByTransitivity, 26.9s TimeCoverageRelationStatistics Valid=745, Invalid=5887, Unknown=10, NotChecked=0, Total=6642 [2022-11-25 16:44:34,170 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 461 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 2207 mSolverCounterSat, 168 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 2382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 2207 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.9s IncrementalHoareTripleChecker+Time [2022-11-25 16:44:34,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 449 Invalid, 2382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 2207 Invalid, 7 Unknown, 0 Unchecked, 21.9s Time] [2022-11-25 16:44:34,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2022-11-25 16:44:34,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 651. [2022-11-25 16:44:34,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 476 states have (on average 1.1428571428571428) internal successors, (544), 493 states have internal predecessors, (544), 96 states have call successors, (96), 67 states have call predecessors, (96), 78 states have return successors, (111), 90 states have call predecessors, (111), 88 states have call successors, (111) [2022-11-25 16:44:34,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 751 transitions. [2022-11-25 16:44:34,278 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 751 transitions. Word has length 109 [2022-11-25 16:44:34,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:44:34,279 INFO L495 AbstractCegarLoop]: Abstraction has 651 states and 751 transitions. [2022-11-25 16:44:34,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.7096774193548385) internal successors, (115), 27 states have internal predecessors, (115), 11 states have call successors, (25), 8 states have call predecessors, (25), 8 states have return successors, (23), 12 states have call predecessors, (23), 9 states have call successors, (23) [2022-11-25 16:44:34,279 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 751 transitions. [2022-11-25 16:44:34,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-25 16:44:34,282 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:44:34,282 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:44:34,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 16:44:34,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 16:44:34,495 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:44:34,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:44:34,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1949008576, now seen corresponding path program 1 times [2022-11-25 16:44:34,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:44:34,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933392179] [2022-11-25 16:44:34,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:34,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:44:34,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:35,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 16:44:35,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:35,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 16:44:35,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:35,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-25 16:44:35,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:35,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:44:35,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:35,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-25 16:44:35,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:35,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-25 16:44:35,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:35,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-25 16:44:35,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:35,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-11-25 16:44:35,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:35,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-11-25 16:44:35,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:35,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-25 16:44:35,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:35,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-11-25 16:44:35,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:35,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-11-25 16:44:35,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:35,549 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-25 16:44:35,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:44:35,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933392179] [2022-11-25 16:44:35,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933392179] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:44:35,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:44:35,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 16:44:35,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635161245] [2022-11-25 16:44:35,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:44:35,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 16:44:35,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:44:35,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 16:44:35,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 16:44:35,552 INFO L87 Difference]: Start difference. First operand 651 states and 751 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-25 16:44:36,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:44:36,544 INFO L93 Difference]: Finished difference Result 1117 states and 1315 transitions. [2022-11-25 16:44:36,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 16:44:36,545 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) Word has length 109 [2022-11-25 16:44:36,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:44:36,549 INFO L225 Difference]: With dead ends: 1117 [2022-11-25 16:44:36,549 INFO L226 Difference]: Without dead ends: 634 [2022-11-25 16:44:36,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-25 16:44:36,552 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 47 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 16:44:36,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 192 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 16:44:36,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2022-11-25 16:44:36,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 619. [2022-11-25 16:44:36,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 451 states have (on average 1.1108647450110865) internal successors, (501), 466 states have internal predecessors, (501), 92 states have call successors, (92), 65 states have call predecessors, (92), 75 states have return successors, (105), 87 states have call predecessors, (105), 86 states have call successors, (105) [2022-11-25 16:44:36,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 698 transitions. [2022-11-25 16:44:36,657 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 698 transitions. Word has length 109 [2022-11-25 16:44:36,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:44:36,657 INFO L495 AbstractCegarLoop]: Abstraction has 619 states and 698 transitions. [2022-11-25 16:44:36,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-25 16:44:36,658 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 698 transitions. [2022-11-25 16:44:36,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-25 16:44:36,661 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:44:36,661 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:44:36,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-25 16:44:36,661 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:44:36,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:44:36,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1466498319, now seen corresponding path program 1 times [2022-11-25 16:44:36,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:44:36,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349691958] [2022-11-25 16:44:36,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:36,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:44:36,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:37,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 16:44:37,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:37,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 16:44:37,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:37,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-25 16:44:37,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:37,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 16:44:37,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:37,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-25 16:44:37,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:37,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:44:37,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:37,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 16:44:37,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:37,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-25 16:44:37,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:37,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 16:44:37,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:37,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-25 16:44:37,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:37,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-25 16:44:37,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:37,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-25 16:44:37,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:37,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-11-25 16:44:37,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:37,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-11-25 16:44:37,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:37,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-11-25 16:44:37,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:37,367 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-11-25 16:44:37,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:44:37,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349691958] [2022-11-25 16:44:37,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349691958] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:44:37,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:44:37,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 16:44:37,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539842723] [2022-11-25 16:44:37,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:44:37,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 16:44:37,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:44:37,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 16:44:37,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 16:44:37,370 INFO L87 Difference]: Start difference. First operand 619 states and 698 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-25 16:44:38,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:44:38,585 INFO L93 Difference]: Finished difference Result 672 states and 753 transitions. [2022-11-25 16:44:38,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 16:44:38,586 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 112 [2022-11-25 16:44:38,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:44:38,590 INFO L225 Difference]: With dead ends: 672 [2022-11-25 16:44:38,591 INFO L226 Difference]: Without dead ends: 619 [2022-11-25 16:44:38,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-25 16:44:38,592 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 48 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 16:44:38,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 218 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-25 16:44:38,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-11-25 16:44:38,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 619. [2022-11-25 16:44:38,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 451 states have (on average 1.0975609756097562) internal successors, (495), 466 states have internal predecessors, (495), 92 states have call successors, (92), 65 states have call predecessors, (92), 75 states have return successors, (105), 87 states have call predecessors, (105), 86 states have call successors, (105) [2022-11-25 16:44:38,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 692 transitions. [2022-11-25 16:44:38,684 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 692 transitions. Word has length 112 [2022-11-25 16:44:38,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:44:38,687 INFO L495 AbstractCegarLoop]: Abstraction has 619 states and 692 transitions. [2022-11-25 16:44:38,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-25 16:44:38,687 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 692 transitions. [2022-11-25 16:44:38,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-25 16:44:38,689 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:44:38,690 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:44:38,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-25 16:44:38,690 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:44:38,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:44:38,691 INFO L85 PathProgramCache]: Analyzing trace with hash -641051383, now seen corresponding path program 1 times [2022-11-25 16:44:38,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:44:38,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838017189] [2022-11-25 16:44:38,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:38,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:44:38,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:40,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 16:44:40,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:40,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 16:44:40,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:40,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-25 16:44:40,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:40,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:44:40,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:40,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-25 16:44:40,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:40,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-25 16:44:40,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:40,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-25 16:44:40,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:40,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-11-25 16:44:40,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:40,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-11-25 16:44:40,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:40,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-25 16:44:40,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:40,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-11-25 16:44:40,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:40,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-11-25 16:44:40,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:41,048 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-25 16:44:41,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:44:41,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838017189] [2022-11-25 16:44:41,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838017189] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:44:41,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:44:41,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-25 16:44:41,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965479690] [2022-11-25 16:44:41,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:44:41,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 16:44:41,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:44:41,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 16:44:41,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-11-25 16:44:41,051 INFO L87 Difference]: Start difference. First operand 619 states and 692 transitions. Second operand has 14 states, 13 states have (on average 4.230769230769231) internal successors, (55), 11 states have internal predecessors, (55), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-25 16:44:44,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:44:44,392 INFO L93 Difference]: Finished difference Result 674 states and 748 transitions. [2022-11-25 16:44:44,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 16:44:44,393 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.230769230769231) internal successors, (55), 11 states have internal predecessors, (55), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) Word has length 111 [2022-11-25 16:44:44,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:44:44,397 INFO L225 Difference]: With dead ends: 674 [2022-11-25 16:44:44,397 INFO L226 Difference]: Without dead ends: 672 [2022-11-25 16:44:44,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2022-11-25 16:44:44,399 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 79 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-25 16:44:44,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 660 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-25 16:44:44,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2022-11-25 16:44:44,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 623. [2022-11-25 16:44:44,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 455 states have (on average 1.0967032967032968) internal successors, (499), 471 states have internal predecessors, (499), 91 states have call successors, (91), 65 states have call predecessors, (91), 76 states have return successors, (106), 86 states have call predecessors, (106), 85 states have call successors, (106) [2022-11-25 16:44:44,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 696 transitions. [2022-11-25 16:44:44,498 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 696 transitions. Word has length 111 [2022-11-25 16:44:44,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:44:44,502 INFO L495 AbstractCegarLoop]: Abstraction has 623 states and 696 transitions. [2022-11-25 16:44:44,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.230769230769231) internal successors, (55), 11 states have internal predecessors, (55), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-25 16:44:44,502 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 696 transitions. [2022-11-25 16:44:44,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-25 16:44:44,506 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:44:44,506 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:44:44,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-25 16:44:44,506 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:44:44,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:44:44,507 INFO L85 PathProgramCache]: Analyzing trace with hash 964794292, now seen corresponding path program 1 times [2022-11-25 16:44:44,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:44:44,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230839412] [2022-11-25 16:44:44,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:44,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:44:44,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:45,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 16:44:45,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:45,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 16:44:45,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:45,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-25 16:44:45,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:45,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 16:44:45,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:45,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-25 16:44:45,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:45,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:44:45,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:45,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 16:44:45,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:45,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-25 16:44:45,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:45,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 16:44:45,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:45,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-25 16:44:45,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:45,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-25 16:44:45,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:45,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-25 16:44:45,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:45,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-11-25 16:44:45,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:45,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-11-25 16:44:45,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:45,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-11-25 16:44:45,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:45,636 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-11-25 16:44:45,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:44:45,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230839412] [2022-11-25 16:44:45,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230839412] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:44:45,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:44:45,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-25 16:44:45,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099653280] [2022-11-25 16:44:45,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:44:45,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 16:44:45,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:44:45,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 16:44:45,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-25 16:44:45,640 INFO L87 Difference]: Start difference. First operand 623 states and 696 transitions. Second operand has 9 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2022-11-25 16:44:47,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:44:47,660 INFO L93 Difference]: Finished difference Result 651 states and 726 transitions. [2022-11-25 16:44:47,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 16:44:47,662 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 114 [2022-11-25 16:44:47,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:44:47,669 INFO L225 Difference]: With dead ends: 651 [2022-11-25 16:44:47,669 INFO L226 Difference]: Without dead ends: 649 [2022-11-25 16:44:47,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-11-25 16:44:47,671 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 53 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-25 16:44:47,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 401 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-25 16:44:47,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2022-11-25 16:44:47,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 646. [2022-11-25 16:44:47,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 470 states have (on average 1.0936170212765957) internal successors, (514), 488 states have internal predecessors, (514), 94 states have call successors, (94), 68 states have call predecessors, (94), 81 states have return successors, (111), 89 states have call predecessors, (111), 88 states have call successors, (111) [2022-11-25 16:44:47,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 719 transitions. [2022-11-25 16:44:47,780 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 719 transitions. Word has length 114 [2022-11-25 16:44:47,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:44:47,781 INFO L495 AbstractCegarLoop]: Abstraction has 646 states and 719 transitions. [2022-11-25 16:44:47,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2022-11-25 16:44:47,781 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 719 transitions. [2022-11-25 16:44:47,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-25 16:44:47,784 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:44:47,784 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:44:47,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-25 16:44:47,784 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:44:47,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:44:47,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1411369220, now seen corresponding path program 1 times [2022-11-25 16:44:47,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:44:47,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977494645] [2022-11-25 16:44:47,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:47,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:44:48,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:51,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 16:44:51,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:51,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 16:44:51,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:51,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-25 16:44:51,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:51,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:44:51,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:51,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-25 16:44:51,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:51,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-25 16:44:51,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:51,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-25 16:44:51,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:51,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-11-25 16:44:51,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:51,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-11-25 16:44:51,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:51,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-25 16:44:51,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:52,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-11-25 16:44:52,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:52,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-11-25 16:44:52,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:52,628 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-25 16:44:52,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:44:52,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977494645] [2022-11-25 16:44:52,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977494645] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:44:52,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898524158] [2022-11-25 16:44:52,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:52,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:44:52,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:44:52,631 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:44:52,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 16:44:53,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:53,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 2688 conjuncts, 85 conjunts are in the unsatisfiable core [2022-11-25 16:44:53,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:44:53,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 16:44:53,802 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-25 16:44:53,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 16:44:54,130 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 11 treesize of output 7 [2022-11-25 16:44:55,387 INFO L321 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2022-11-25 16:44:55,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2022-11-25 16:44:55,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-11-25 16:44:59,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-11-25 16:45:17,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 16:45:17,381 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 16:45:17,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 21 [2022-11-25 16:45:20,119 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 20 proven. 66 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 16:45:20,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:45:22,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-11-25 16:45:25,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898524158] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:45:25,386 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:45:25,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 27] total 38 [2022-11-25 16:45:25,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730625878] [2022-11-25 16:45:25,387 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 16:45:25,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-25 16:45:25,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:45:25,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-25 16:45:25,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=2047, Unknown=7, NotChecked=0, Total=2256 [2022-11-25 16:45:25,391 INFO L87 Difference]: Start difference. First operand 646 states and 719 transitions. Second operand has 38 states, 38 states have (on average 3.289473684210526) internal successors, (125), 33 states have internal predecessors, (125), 13 states have call successors, (25), 9 states have call predecessors, (25), 8 states have return successors, (23), 13 states have call predecessors, (23), 11 states have call successors, (23) [2022-11-25 16:45:27,716 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 16:45:31,287 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:45:34,696 WARN L539 Checker$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 16:45:36,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:45:50,052 WARN L539 Checker$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 16:45:53,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:45:57,797 WARN L539 Checker$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 16:46:02,799 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 16:46:08,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:46:08,555 INFO L93 Difference]: Finished difference Result 994 states and 1103 transitions. [2022-11-25 16:46:08,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-25 16:46:08,556 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.289473684210526) internal successors, (125), 33 states have internal predecessors, (125), 13 states have call successors, (25), 9 states have call predecessors, (25), 8 states have return successors, (23), 13 states have call predecessors, (23), 11 states have call successors, (23) Word has length 112 [2022-11-25 16:46:08,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:46:08,561 INFO L225 Difference]: With dead ends: 994 [2022-11-25 16:46:08,561 INFO L226 Difference]: Without dead ends: 849 [2022-11-25 16:46:08,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 132 SyntacticMatches, 16 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4081 ImplicationChecksByTransitivity, 45.6s TimeCoverageRelationStatistics Valid=1426, Invalid=10999, Unknown=7, NotChecked=0, Total=12432 [2022-11-25 16:46:08,566 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 666 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 3101 mSolverCounterSat, 370 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 3479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 370 IncrementalHoareTripleChecker+Valid, 3101 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.6s IncrementalHoareTripleChecker+Time [2022-11-25 16:46:08,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [676 Valid, 432 Invalid, 3479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [370 Valid, 3101 Invalid, 8 Unknown, 0 Unchecked, 27.6s Time] [2022-11-25 16:46:08,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2022-11-25 16:46:08,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 645. [2022-11-25 16:46:08,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 470 states have (on average 1.0914893617021277) internal successors, (513), 488 states have internal predecessors, (513), 93 states have call successors, (93), 68 states have call predecessors, (93), 81 states have return successors, (109), 88 states have call predecessors, (109), 87 states have call successors, (109) [2022-11-25 16:46:08,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 715 transitions. [2022-11-25 16:46:08,677 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 715 transitions. Word has length 112 [2022-11-25 16:46:08,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:46:08,678 INFO L495 AbstractCegarLoop]: Abstraction has 645 states and 715 transitions. [2022-11-25 16:46:08,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.289473684210526) internal successors, (125), 33 states have internal predecessors, (125), 13 states have call successors, (25), 9 states have call predecessors, (25), 8 states have return successors, (23), 13 states have call predecessors, (23), 11 states have call successors, (23) [2022-11-25 16:46:08,678 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 715 transitions. [2022-11-25 16:46:08,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-25 16:46:08,680 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:46:08,681 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:46:08,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 16:46:08,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:46:08,890 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:46:08,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:46:08,891 INFO L85 PathProgramCache]: Analyzing trace with hash 415964924, now seen corresponding path program 1 times [2022-11-25 16:46:08,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:46:08,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283763675] [2022-11-25 16:46:08,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:46:08,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:46:08,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:10,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 16:46:10,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:10,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 16:46:10,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:10,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-25 16:46:10,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:10,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 16:46:10,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:10,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-25 16:46:10,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:11,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:46:11,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:11,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 16:46:11,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:11,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-25 16:46:11,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:11,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 16:46:11,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:11,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-25 16:46:11,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:11,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-25 16:46:11,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:11,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-25 16:46:11,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:11,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-11-25 16:46:11,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:11,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-11-25 16:46:11,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:11,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-11-25 16:46:11,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:11,622 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 30 proven. 29 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-11-25 16:46:11,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:46:11,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283763675] [2022-11-25 16:46:11,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283763675] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:46:11,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114747347] [2022-11-25 16:46:11,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:46:11,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:46:11,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:46:11,627 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:46:11,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 16:46:12,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:12,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-25 16:46:12,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:46:15,900 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 70 proven. 36 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-25 16:46:15,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:46:17,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114747347] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:46:17,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:46:17,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 30 [2022-11-25 16:46:17,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636226294] [2022-11-25 16:46:17,120 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 16:46:17,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-25 16:46:17,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:46:17,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-25 16:46:17,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1010, Unknown=1, NotChecked=0, Total=1122 [2022-11-25 16:46:17,122 INFO L87 Difference]: Start difference. First operand 645 states and 715 transitions. Second operand has 30 states, 29 states have (on average 3.3448275862068964) internal successors, (97), 26 states have internal predecessors, (97), 11 states have call successors, (31), 5 states have call predecessors, (31), 7 states have return successors, (30), 12 states have call predecessors, (30), 10 states have call successors, (30) [2022-11-25 16:46:33,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:46:33,079 INFO L93 Difference]: Finished difference Result 934 states and 1052 transitions. [2022-11-25 16:46:33,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-25 16:46:33,080 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 3.3448275862068964) internal successors, (97), 26 states have internal predecessors, (97), 11 states have call successors, (31), 5 states have call predecessors, (31), 7 states have return successors, (30), 12 states have call predecessors, (30), 10 states have call successors, (30) Word has length 118 [2022-11-25 16:46:33,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:46:33,084 INFO L225 Difference]: With dead ends: 934 [2022-11-25 16:46:33,084 INFO L226 Difference]: Without dead ends: 684 [2022-11-25 16:46:33,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 153 SyntacticMatches, 13 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1311 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=498, Invalid=4316, Unknown=16, NotChecked=0, Total=4830 [2022-11-25 16:46:33,088 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 259 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 2949 mSolverCounterSat, 258 mSolverCounterUnsat, 94 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 3301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 2949 IncrementalHoareTripleChecker+Invalid, 94 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2022-11-25 16:46:33,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 438 Invalid, 3301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 2949 Invalid, 94 Unknown, 0 Unchecked, 10.7s Time] [2022-11-25 16:46:33,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2022-11-25 16:46:33,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 585. [2022-11-25 16:46:33,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 417 states have (on average 1.0671462829736211) internal successors, (445), 427 states have internal predecessors, (445), 95 states have call successors, (95), 66 states have call predecessors, (95), 72 states have return successors, (108), 91 states have call predecessors, (108), 89 states have call successors, (108) [2022-11-25 16:46:33,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 648 transitions. [2022-11-25 16:46:33,234 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 648 transitions. Word has length 118 [2022-11-25 16:46:33,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:46:33,235 INFO L495 AbstractCegarLoop]: Abstraction has 585 states and 648 transitions. [2022-11-25 16:46:33,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 3.3448275862068964) internal successors, (97), 26 states have internal predecessors, (97), 11 states have call successors, (31), 5 states have call predecessors, (31), 7 states have return successors, (30), 12 states have call predecessors, (30), 10 states have call successors, (30) [2022-11-25 16:46:33,237 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 648 transitions. [2022-11-25 16:46:33,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-25 16:46:33,241 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:46:33,241 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:46:33,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 16:46:33,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:46:33,452 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:46:33,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:46:33,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1324049691, now seen corresponding path program 1 times [2022-11-25 16:46:33,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:46:33,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320820320] [2022-11-25 16:46:33,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:46:33,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:46:33,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:35,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 16:46:35,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:35,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 16:46:35,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:35,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-25 16:46:35,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:35,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 16:46:35,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:35,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-25 16:46:35,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:35,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:46:35,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:35,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 16:46:35,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:35,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-25 16:46:35,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:35,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 16:46:35,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:35,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-25 16:46:35,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:35,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-25 16:46:35,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:35,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-25 16:46:35,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:35,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-11-25 16:46:35,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:36,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-11-25 16:46:36,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:36,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-11-25 16:46:36,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:36,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-11-25 16:46:36,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:36,056 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-11-25 16:46:36,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:46:36,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320820320] [2022-11-25 16:46:36,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320820320] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:46:36,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:46:36,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-25 16:46:36,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564315448] [2022-11-25 16:46:36,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:46:36,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 16:46:36,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:46:36,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 16:46:36,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-25 16:46:36,059 INFO L87 Difference]: Start difference. First operand 585 states and 648 transitions. Second operand has 14 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 7 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2022-11-25 16:46:39,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:46:39,949 INFO L93 Difference]: Finished difference Result 598 states and 661 transitions. [2022-11-25 16:46:39,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 16:46:39,950 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 7 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 124 [2022-11-25 16:46:39,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:46:39,952 INFO L225 Difference]: With dead ends: 598 [2022-11-25 16:46:39,952 INFO L226 Difference]: Without dead ends: 322 [2022-11-25 16:46:39,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-11-25 16:46:39,954 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 67 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-25 16:46:39,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 330 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 963 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-25 16:46:39,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-11-25 16:46:40,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2022-11-25 16:46:40,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 235 states have (on average 1.102127659574468) internal successors, (259), 242 states have internal predecessors, (259), 48 states have call successors, (48), 33 states have call predecessors, (48), 38 states have return successors, (59), 46 states have call predecessors, (59), 44 states have call successors, (59) [2022-11-25 16:46:40,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 366 transitions. [2022-11-25 16:46:40,015 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 366 transitions. Word has length 124 [2022-11-25 16:46:40,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:46:40,015 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 366 transitions. [2022-11-25 16:46:40,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 7 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2022-11-25 16:46:40,015 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 366 transitions. [2022-11-25 16:46:40,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-25 16:46:40,016 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:46:40,017 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:46:40,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-25 16:46:40,017 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:46:40,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:46:40,018 INFO L85 PathProgramCache]: Analyzing trace with hash 73196301, now seen corresponding path program 1 times [2022-11-25 16:46:40,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:46:40,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887013212] [2022-11-25 16:46:40,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:46:40,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:46:40,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:42,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 16:46:42,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:42,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 16:46:42,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:42,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-25 16:46:42,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:43,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:46:43,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:43,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-25 16:46:43,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:43,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-25 16:46:43,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:43,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-25 16:46:43,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:43,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-11-25 16:46:43,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:43,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-11-25 16:46:43,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:43,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-25 16:46:43,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:43,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-11-25 16:46:43,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:43,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-11-25 16:46:43,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:43,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-11-25 16:46:43,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:43,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-11-25 16:46:43,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:43,755 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-11-25 16:46:43,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:46:43,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887013212] [2022-11-25 16:46:43,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887013212] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:46:43,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:46:43,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-11-25 16:46:43,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145319678] [2022-11-25 16:46:43,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:46:43,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 16:46:43,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:46:43,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 16:46:43,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2022-11-25 16:46:43,758 INFO L87 Difference]: Start difference. First operand 322 states and 366 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 17 states have internal predecessors, (60), 10 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (14), 10 states have call predecessors, (14), 8 states have call successors, (14) [2022-11-25 16:46:48,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:46:48,006 INFO L93 Difference]: Finished difference Result 464 states and 522 transitions. [2022-11-25 16:46:48,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 16:46:48,007 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 17 states have internal predecessors, (60), 10 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (14), 10 states have call predecessors, (14), 8 states have call successors, (14) Word has length 129 [2022-11-25 16:46:48,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:46:48,009 INFO L225 Difference]: With dead ends: 464 [2022-11-25 16:46:48,009 INFO L226 Difference]: Without dead ends: 322 [2022-11-25 16:46:48,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2022-11-25 16:46:48,010 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 94 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 1223 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 1281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-25 16:46:48,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 242 Invalid, 1281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1223 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-25 16:46:48,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-11-25 16:46:48,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 312. [2022-11-25 16:46:48,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 227 states have (on average 1.0969162995594715) internal successors, (249), 232 states have internal predecessors, (249), 48 states have call successors, (48), 33 states have call predecessors, (48), 36 states have return successors, (57), 46 states have call predecessors, (57), 44 states have call successors, (57) [2022-11-25 16:46:48,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 354 transitions. [2022-11-25 16:46:48,072 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 354 transitions. Word has length 129 [2022-11-25 16:46:48,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:46:48,073 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 354 transitions. [2022-11-25 16:46:48,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 17 states have internal predecessors, (60), 10 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (14), 10 states have call predecessors, (14), 8 states have call successors, (14) [2022-11-25 16:46:48,073 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 354 transitions. [2022-11-25 16:46:48,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-25 16:46:48,074 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:46:48,074 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:46:48,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-25 16:46:48,075 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:46:48,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:46:48,075 INFO L85 PathProgramCache]: Analyzing trace with hash 212748628, now seen corresponding path program 1 times [2022-11-25 16:46:48,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:46:48,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467516898] [2022-11-25 16:46:48,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:46:48,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:46:48,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:49,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 16:46:49,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:49,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 16:46:49,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:49,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-25 16:46:49,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:49,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:46:49,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:49,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-25 16:46:49,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:49,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-25 16:46:49,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:49,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-25 16:46:49,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:49,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-11-25 16:46:49,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:49,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-11-25 16:46:49,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:49,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-25 16:46:49,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:49,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-11-25 16:46:49,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:49,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-11-25 16:46:49,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:49,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-11-25 16:46:49,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:49,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-11-25 16:46:49,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:50,007 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-11-25 16:46:50,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:46:50,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467516898] [2022-11-25 16:46:50,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467516898] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:46:50,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:46:50,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-25 16:46:50,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46728907] [2022-11-25 16:46:50,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:46:50,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 16:46:50,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:46:50,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 16:46:50,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-11-25 16:46:50,010 INFO L87 Difference]: Start difference. First operand 312 states and 354 transitions. Second operand has 14 states, 13 states have (on average 4.538461538461538) internal successors, (59), 11 states have internal predecessors, (59), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2022-11-25 16:46:53,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:46:53,035 INFO L93 Difference]: Finished difference Result 324 states and 365 transitions. [2022-11-25 16:46:53,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 16:46:53,036 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.538461538461538) internal successors, (59), 11 states have internal predecessors, (59), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) Word has length 131 [2022-11-25 16:46:53,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:46:53,038 INFO L225 Difference]: With dead ends: 324 [2022-11-25 16:46:53,039 INFO L226 Difference]: Without dead ends: 322 [2022-11-25 16:46:53,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2022-11-25 16:46:53,040 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 80 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:46:53,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 632 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-25 16:46:53,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-11-25 16:46:53,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 312. [2022-11-25 16:46:53,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 227 states have (on average 1.0881057268722467) internal successors, (247), 232 states have internal predecessors, (247), 48 states have call successors, (48), 33 states have call predecessors, (48), 36 states have return successors, (57), 46 states have call predecessors, (57), 44 states have call successors, (57) [2022-11-25 16:46:53,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 352 transitions. [2022-11-25 16:46:53,108 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 352 transitions. Word has length 131 [2022-11-25 16:46:53,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:46:53,108 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 352 transitions. [2022-11-25 16:46:53,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.538461538461538) internal successors, (59), 11 states have internal predecessors, (59), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2022-11-25 16:46:53,109 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 352 transitions. [2022-11-25 16:46:53,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-25 16:46:53,110 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:46:53,110 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:46:53,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-25 16:46:53,111 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:46:53,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:46:53,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1852141867, now seen corresponding path program 1 times [2022-11-25 16:46:53,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:46:53,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166352527] [2022-11-25 16:46:53,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:46:53,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:46:53,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:54,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 16:46:54,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:54,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 16:46:54,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:54,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-25 16:46:54,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:54,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:46:54,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:54,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-25 16:46:54,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:54,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-25 16:46:54,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:54,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-25 16:46:54,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:54,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-11-25 16:46:54,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:54,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:46:54,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:54,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-25 16:46:54,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:54,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-25 16:46:54,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:54,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-25 16:46:54,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:54,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-25 16:46:54,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:54,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-25 16:46:54,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:54,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-25 16:46:54,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:54,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-25 16:46:54,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:54,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-11-25 16:46:54,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:54,960 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-11-25 16:46:54,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:46:54,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166352527] [2022-11-25 16:46:54,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166352527] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:46:54,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:46:54,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-11-25 16:46:54,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92734678] [2022-11-25 16:46:54,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:46:54,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 16:46:54,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:46:54,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 16:46:54,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-11-25 16:46:54,963 INFO L87 Difference]: Start difference. First operand 312 states and 352 transitions. Second operand has 15 states, 14 states have (on average 4.642857142857143) internal successors, (65), 11 states have internal predecessors, (65), 2 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) [2022-11-25 16:46:58,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:46:58,265 INFO L93 Difference]: Finished difference Result 328 states and 367 transitions. [2022-11-25 16:46:58,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 16:46:58,266 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.642857142857143) internal successors, (65), 11 states have internal predecessors, (65), 2 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) Word has length 145 [2022-11-25 16:46:58,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:46:58,268 INFO L225 Difference]: With dead ends: 328 [2022-11-25 16:46:58,268 INFO L226 Difference]: Without dead ends: 326 [2022-11-25 16:46:58,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2022-11-25 16:46:58,269 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 80 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-25 16:46:58,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 611 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-25 16:46:58,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-11-25 16:46:58,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 262. [2022-11-25 16:46:58,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 191 states have (on average 1.0837696335078535) internal successors, (207), 194 states have internal predecessors, (207), 40 states have call successors, (40), 28 states have call predecessors, (40), 30 states have return successors, (47), 39 states have call predecessors, (47), 38 states have call successors, (47) [2022-11-25 16:46:58,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 294 transitions. [2022-11-25 16:46:58,322 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 294 transitions. Word has length 145 [2022-11-25 16:46:58,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:46:58,322 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 294 transitions. [2022-11-25 16:46:58,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.642857142857143) internal successors, (65), 11 states have internal predecessors, (65), 2 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) [2022-11-25 16:46:58,323 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 294 transitions. [2022-11-25 16:46:58,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-25 16:46:58,324 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:46:58,324 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 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 16:46:58,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-25 16:46:58,325 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:46:58,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:46:58,325 INFO L85 PathProgramCache]: Analyzing trace with hash -202398992, now seen corresponding path program 1 times [2022-11-25 16:46:58,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:46:58,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264542305] [2022-11-25 16:46:58,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:46:58,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:46:58,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:59,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 16:46:59,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:59,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 16:46:59,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:59,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-25 16:46:59,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:59,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:46:59,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:59,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-25 16:46:59,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:59,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-25 16:46:59,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:59,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-25 16:46:59,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:59,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-11-25 16:46:59,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:59,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:46:59,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:47:00,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-25 16:47:00,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:47:00,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-25 16:47:00,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:47:00,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-25 16:47:00,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:47:00,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-25 16:47:00,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:47:00,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-25 16:47:00,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:47:00,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-25 16:47:00,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:47:00,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-11-25 16:47:00,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:47:00,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-11-25 16:47:00,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:47:00,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-11-25 16:47:00,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:47:00,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-11-25 16:47:00,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:47:00,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-11-25 16:47:00,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:47:00,396 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 26 proven. 41 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-11-25 16:47:00,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:47:00,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264542305] [2022-11-25 16:47:00,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264542305] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:47:00,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880028615] [2022-11-25 16:47:00,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:47:00,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:47:00,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:47:00,399 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:47:00,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 16:47:00,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:47:00,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 2814 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-25 16:47:00,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:47:02,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 16:47:02,053 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 16:47:02,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 31 [2022-11-25 16:47:02,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:47:02,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 32 [2022-11-25 16:47:03,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-25 16:47:03,851 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 73 proven. 52 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-25 16:47:03,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:47:04,791 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 32 proven. 6 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-11-25 16:47:04,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880028615] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:47:04,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:47:04,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16, 7] total 25 [2022-11-25 16:47:04,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231770307] [2022-11-25 16:47:04,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:47:04,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 16:47:04,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:47:04,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 16:47:04,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2022-11-25 16:47:04,795 INFO L87 Difference]: Start difference. First operand 262 states and 294 transitions. Second operand has 25 states, 25 states have (on average 5.52) internal successors, (138), 22 states have internal predecessors, (138), 10 states have call successors, (54), 7 states have call predecessors, (54), 7 states have return successors, (52), 10 states have call predecessors, (52), 10 states have call successors, (52) [2022-11-25 16:47:07,935 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 16:47:11,639 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:47:13,850 WARN L539 Checker$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 16:47:17,115 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:47:19,942 WARN L539 Checker$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 16:47:22,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:47:30,303 WARN L539 Checker$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 16:47:32,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:47:32,314 INFO L93 Difference]: Finished difference Result 450 states and 504 transitions. [2022-11-25 16:47:32,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-25 16:47:32,315 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.52) internal successors, (138), 22 states have internal predecessors, (138), 10 states have call successors, (54), 7 states have call predecessors, (54), 7 states have return successors, (52), 10 states have call predecessors, (52), 10 states have call successors, (52) Word has length 160 [2022-11-25 16:47:32,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:47:32,317 INFO L225 Difference]: With dead ends: 450 [2022-11-25 16:47:32,317 INFO L226 Difference]: Without dead ends: 325 [2022-11-25 16:47:32,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 342 SyntacticMatches, 9 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1044 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=597, Invalid=3307, Unknown=2, NotChecked=0, Total=3906 [2022-11-25 16:47:32,325 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 301 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 2062 mSolverCounterSat, 193 mSolverCounterUnsat, 34 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 2289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 2062 IncrementalHoareTripleChecker+Invalid, 34 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.2s IncrementalHoareTripleChecker+Time [2022-11-25 16:47:32,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 388 Invalid, 2289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 2062 Invalid, 34 Unknown, 0 Unchecked, 21.2s Time] [2022-11-25 16:47:32,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-11-25 16:47:32,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 269. [2022-11-25 16:47:32,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 198 states have (on average 1.0808080808080809) internal successors, (214), 203 states have internal predecessors, (214), 39 states have call successors, (39), 28 states have call predecessors, (39), 31 states have return successors, (46), 37 states have call predecessors, (46), 36 states have call successors, (46) [2022-11-25 16:47:32,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 299 transitions. [2022-11-25 16:47:32,382 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 299 transitions. Word has length 160 [2022-11-25 16:47:32,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:47:32,382 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 299 transitions. [2022-11-25 16:47:32,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.52) internal successors, (138), 22 states have internal predecessors, (138), 10 states have call successors, (54), 7 states have call predecessors, (54), 7 states have return successors, (52), 10 states have call predecessors, (52), 10 states have call successors, (52) [2022-11-25 16:47:32,383 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 299 transitions. [2022-11-25 16:47:32,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-11-25 16:47:32,384 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:47:32,384 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:47:32,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 16:47:32,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-25 16:47:32,591 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:47:32,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:47:32,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1405060019, now seen corresponding path program 1 times [2022-11-25 16:47:32,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:47:32,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657095502] [2022-11-25 16:47:32,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:47:32,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:47:32,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:47:33,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 16:47:33,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:47:33,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 16:47:33,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:47:33,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-25 16:47:33,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:47:33,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:47:33,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:47:33,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-25 16:47:33,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:47:33,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-25 16:47:33,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:47:33,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-25 16:47:33,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:47:33,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-11-25 16:47:33,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:47:34,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:47:34,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:47:34,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-25 16:47:34,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:47:34,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-25 16:47:34,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:47:34,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-25 16:47:34,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:47:34,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-25 16:47:34,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:47:34,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-25 16:47:34,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:47:34,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-11-25 16:47:34,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:47:34,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-11-25 16:47:34,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:47:34,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-11-25 16:47:34,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:47:35,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-11-25 16:47:35,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:47:35,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-11-25 16:47:35,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:47:35,032 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 48 proven. 33 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-11-25 16:47:35,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:47:35,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657095502] [2022-11-25 16:47:35,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657095502] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:47:35,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599428298] [2022-11-25 16:47:35,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:47:35,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:47:35,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:47:35,035 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:47:35,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 16:47:35,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:47:35,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 2828 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-25 16:47:35,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:47:35,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 16:47:36,711 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 16:47:36,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-25 16:47:38,056 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 16:47:38,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2022-11-25 16:47:38,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-25 16:47:40,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-25 16:47:44,177 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 96 proven. 82 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-25 16:47:44,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:47:45,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599428298] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:47:45,063 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:47:45,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2022-11-25 16:47:45,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571599768] [2022-11-25 16:47:45,064 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 16:47:45,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-25 16:47:45,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:47:45,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-25 16:47:45,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1072, Unknown=2, NotChecked=0, Total=1190 [2022-11-25 16:47:45,069 INFO L87 Difference]: Start difference. First operand 269 states and 299 transitions. Second operand has 33 states, 33 states have (on average 4.212121212121212) internal successors, (139), 30 states have internal predecessors, (139), 13 states have call successors, (39), 9 states have call predecessors, (39), 12 states have return successors, (38), 13 states have call predecessors, (38), 13 states have call successors, (38) [2022-11-25 16:47:49,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:47:55,717 WARN L539 Checker$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 16:47:59,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:48:01,930 WARN L539 Checker$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 16:48:03,950 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:48:08,147 WARN L539 Checker$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 16:48:10,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:48:12,260 WARN L539 Checker$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 16:48:14,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:48:16,677 WARN L539 Checker$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 16:48:18,685 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:48:20,935 WARN L539 Checker$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 16:48:23,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:48:25,263 WARN L539 Checker$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 16:48:27,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:48:31,573 WARN L539 Checker$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 16:48:33,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:48:35,676 WARN L539 Checker$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 16:48:37,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:48:39,788 WARN L539 Checker$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 16:48:41,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:48:43,983 WARN L539 Checker$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 16:48:48,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:48:50,487 WARN L539 Checker$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 16:48:52,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:48:55,042 WARN L539 Checker$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 16:49:00,218 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:49:02,864 WARN L539 Checker$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 16:49:03,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:49:03,181 INFO L93 Difference]: Finished difference Result 387 states and 433 transitions. [2022-11-25 16:49:03,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-25 16:49:03,182 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 4.212121212121212) internal successors, (139), 30 states have internal predecessors, (139), 13 states have call successors, (39), 9 states have call predecessors, (39), 12 states have return successors, (38), 13 states have call predecessors, (38), 13 states have call successors, (38) Word has length 166 [2022-11-25 16:49:03,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:49:03,183 INFO L225 Difference]: With dead ends: 387 [2022-11-25 16:49:03,183 INFO L226 Difference]: Without dead ends: 349 [2022-11-25 16:49:03,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 219 SyntacticMatches, 9 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1384 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=658, Invalid=4163, Unknown=9, NotChecked=0, Total=4830 [2022-11-25 16:49:03,186 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 501 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 2696 mSolverCounterSat, 277 mSolverCounterUnsat, 50 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 66.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 3023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 2696 IncrementalHoareTripleChecker+Invalid, 50 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 66.5s IncrementalHoareTripleChecker+Time [2022-11-25 16:49:03,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [510 Valid, 392 Invalid, 3023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 2696 Invalid, 50 Unknown, 0 Unchecked, 66.5s Time] [2022-11-25 16:49:03,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-11-25 16:49:03,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 326. [2022-11-25 16:49:03,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 238 states have (on average 1.0798319327731092) internal successors, (257), 242 states have internal predecessors, (257), 51 states have call successors, (51), 32 states have call predecessors, (51), 36 states have return successors, (61), 51 states have call predecessors, (61), 48 states have call successors, (61) [2022-11-25 16:49:03,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 369 transitions. [2022-11-25 16:49:03,261 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 369 transitions. Word has length 166 [2022-11-25 16:49:03,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:49:03,261 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 369 transitions. [2022-11-25 16:49:03,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.212121212121212) internal successors, (139), 30 states have internal predecessors, (139), 13 states have call successors, (39), 9 states have call predecessors, (39), 12 states have return successors, (38), 13 states have call predecessors, (38), 13 states have call successors, (38) [2022-11-25 16:49:03,262 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 369 transitions. [2022-11-25 16:49:03,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-11-25 16:49:03,263 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:49:03,263 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:49:03,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 16:49:03,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-25 16:49:03,474 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:49:03,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:49:03,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1338792069, now seen corresponding path program 1 times [2022-11-25 16:49:03,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:49:03,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820203283] [2022-11-25 16:49:03,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:49:03,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:49:03,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:49:04,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 16:49:04,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:49:04,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 16:49:04,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:49:04,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-25 16:49:04,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:49:04,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:49:04,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:49:04,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-25 16:49:04,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:49:04,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-25 16:49:04,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:49:04,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-25 16:49:04,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:49:04,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-11-25 16:49:04,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:49:04,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:49:04,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:49:04,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-25 16:49:04,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:49:04,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-25 16:49:04,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:49:04,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-25 16:49:04,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:49:04,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-25 16:49:04,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:49:04,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-25 16:49:04,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:49:04,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-25 16:49:04,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:49:04,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-25 16:49:04,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:49:04,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-11-25 16:49:04,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:49:04,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2022-11-25 16:49:04,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:49:04,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2022-11-25 16:49:04,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:49:04,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2022-11-25 16:49:04,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:49:04,795 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 20 proven. 18 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-11-25 16:49:04,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:49:04,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820203283] [2022-11-25 16:49:04,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820203283] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:49:04,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316790839] [2022-11-25 16:49:04,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:49:04,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:49:04,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:49:04,800 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:49:04,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 16:49:05,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:49:05,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 2857 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-25 16:49:05,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:49:05,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 16:49:05,903 WARN L859 $PredicateComparison]: unable to prove that (exists ((|bounded_malloc_#res.base| Int)) (= |c_#valid| (store |c_old(#valid)| |bounded_malloc_#res.base| 1))) is different from true [2022-11-25 16:49:05,946 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-25 16:49:05,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 16:49:07,109 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 16:49:07,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2022-11-25 16:49:07,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-25 16:49:07,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-25 16:49:14,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 16:49:17,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 16:49:18,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 16:49:20,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 16:49:20,796 INFO L321 Elim1Store]: treesize reduction 21, result has 12.5 percent of original size [2022-11-25 16:49:20,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 17 [2022-11-25 16:49:21,419 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 100 proven. 89 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-25 16:49:21,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:49:24,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316790839] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:49:24,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:49:24,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 28] total 37 [2022-11-25 16:49:24,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977864171] [2022-11-25 16:49:24,445 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 16:49:24,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-25 16:49:24,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:49:24,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-25 16:49:24,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1698, Unknown=6, NotChecked=84, Total=1980 [2022-11-25 16:49:24,448 INFO L87 Difference]: Start difference. First operand 326 states and 369 transitions. Second operand has 37 states, 37 states have (on average 4.1891891891891895) internal successors, (155), 33 states have internal predecessors, (155), 16 states have call successors, (42), 10 states have call predecessors, (42), 13 states have return successors, (40), 14 states have call predecessors, (40), 16 states have call successors, (40) [2022-11-25 16:49:28,663 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 16:49:35,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:49:39,898 WARN L539 Checker$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 16:49:50,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:49:56,995 WARN L539 Checker$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 16:50:01,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:50:15,512 WARN L539 Checker$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 16:50:22,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:50:25,791 WARN L539 Checker$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 16:50:32,118 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:50:34,192 WARN L539 Checker$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 16:50:36,326 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:50:39,264 WARN L539 Checker$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 16:50:41,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:50:43,458 WARN L539 Checker$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 16:50:45,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:50:47,633 WARN L539 Checker$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 16:50:51,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:50:53,879 WARN L539 Checker$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 16:51:11,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:51:13,061 WARN L539 Checker$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 16:51:30,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:51:32,172 WARN L539 Checker$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 16:52:21,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:52:21,355 INFO L93 Difference]: Finished difference Result 485 states and 531 transitions. [2022-11-25 16:52:21,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-11-25 16:52:21,356 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.1891891891891895) internal successors, (155), 33 states have internal predecessors, (155), 16 states have call successors, (42), 10 states have call predecessors, (42), 13 states have return successors, (40), 14 states have call predecessors, (40), 16 states have call successors, (40) Word has length 169 [2022-11-25 16:52:21,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:52:21,359 INFO L225 Difference]: With dead ends: 485 [2022-11-25 16:52:21,359 INFO L226 Difference]: Without dead ends: 396 [2022-11-25 16:52:21,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 254 SyntacticMatches, 14 SemanticMatches, 116 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4440 ImplicationChecksByTransitivity, 132.8s TimeCoverageRelationStatistics Valid=1446, Invalid=12068, Unknown=62, NotChecked=230, Total=13806 [2022-11-25 16:52:21,363 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 685 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 3514 mSolverCounterSat, 373 mSolverCounterUnsat, 47 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 59.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 699 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 4187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 373 IncrementalHoareTripleChecker+Valid, 3514 IncrementalHoareTripleChecker+Invalid, 47 IncrementalHoareTripleChecker+Unknown, 253 IncrementalHoareTripleChecker+Unchecked, 59.7s IncrementalHoareTripleChecker+Time [2022-11-25 16:52:21,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [699 Valid, 486 Invalid, 4187 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [373 Valid, 3514 Invalid, 47 Unknown, 253 Unchecked, 59.7s Time] [2022-11-25 16:52:21,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-11-25 16:52:21,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 309. [2022-11-25 16:52:21,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 228 states have (on average 1.0745614035087718) internal successors, (245), 232 states have internal predecessors, (245), 45 states have call successors, (45), 34 states have call predecessors, (45), 35 states have return successors, (45), 42 states have call predecessors, (45), 40 states have call successors, (45) [2022-11-25 16:52:21,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 335 transitions. [2022-11-25 16:52:21,490 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 335 transitions. Word has length 169 [2022-11-25 16:52:21,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:52:21,491 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 335 transitions. [2022-11-25 16:52:21,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.1891891891891895) internal successors, (155), 33 states have internal predecessors, (155), 16 states have call successors, (42), 10 states have call predecessors, (42), 13 states have return successors, (40), 14 states have call predecessors, (40), 16 states have call successors, (40) [2022-11-25 16:52:21,491 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 335 transitions. [2022-11-25 16:52:21,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-11-25 16:52:21,492 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:52:21,492 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:52:21,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-25 16:52:21,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-25 16:52:21,693 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:52:21,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:52:21,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1527377470, now seen corresponding path program 1 times [2022-11-25 16:52:21,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:52:21,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496264574] [2022-11-25 16:52:21,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:52:21,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:52:21,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:52:23,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 16:52:23,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:52:23,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 16:52:23,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:52:23,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-25 16:52:23,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:52:23,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:52:23,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:52:23,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-25 16:52:23,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:52:23,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-25 16:52:23,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:52:23,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-25 16:52:23,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:52:24,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-11-25 16:52:24,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:52:25,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:52:25,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:52:25,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-25 16:52:25,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:52:25,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-25 16:52:25,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:52:25,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-25 16:52:25,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:52:25,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-25 16:52:25,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:52:25,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-25 16:52:25,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:52:25,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-25 16:52:25,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:52:25,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-11-25 16:52:25,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:52:25,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-25 16:52:25,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:52:25,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-11-25 16:52:25,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:52:25,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2022-11-25 16:52:25,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:52:25,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-11-25 16:52:25,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:52:25,610 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 36 proven. 23 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-11-25 16:52:25,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:52:25,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496264574] [2022-11-25 16:52:25,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496264574] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:52:25,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908514983] [2022-11-25 16:52:25,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:52:25,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:52:25,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:52:25,614 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:52:25,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 16:52:26,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:52:26,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 2857 conjuncts, 74 conjunts are in the unsatisfiable core [2022-11-25 16:52:26,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:52:26,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 16:52:26,945 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 16:52:26,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-25 16:52:28,173 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 16:52:28,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2022-11-25 16:52:28,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-25 16:52:42,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-25 16:52:45,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 16:52:45,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 16:52:47,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 16:52:47,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 16:52:48,315 WARN L859 $PredicateComparison]: unable to prove that (exists ((|aws_byte_cursor_right_trim_pred_~#trimmed~0.base| Int) (v_ArrVal_1222 Int)) (and (= |c_#memory_int| (store |c_old(#memory_int)| |aws_byte_cursor_right_trim_pred_~#trimmed~0.base| (store (select |c_old(#memory_int)| |aws_byte_cursor_right_trim_pred_~#trimmed~0.base|) 0 v_ArrVal_1222))) (not (= (mod (select (select |c_#memory_int| |aws_byte_cursor_right_trim_pred_~#trimmed~0.base|) 0) 18446744073709551616) 0)))) is different from true [2022-11-25 16:52:48,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 16:53:02,598 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((|aws_byte_cursor_right_trim_pred_~#trimmed~0.base| Int) (v_ArrVal_1222 Int)) (and (= |c_#memory_int| (store |c_old(#memory_int)| |aws_byte_cursor_right_trim_pred_~#trimmed~0.base| (store (select |c_old(#memory_int)| |aws_byte_cursor_right_trim_pred_~#trimmed~0.base|) 0 v_ArrVal_1222))) (not (= (mod (select (select |c_#memory_int| |aws_byte_cursor_right_trim_pred_~#trimmed~0.base|) 0) 18446744073709551616) 0)))) (exists ((|v_ULTIMATE.start_aws_byte_cursor_right_trim_pred_harness_~#cur~3#1.base_BEFORE_CALL_76| Int)) (not (= (mod (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_cursor_right_trim_pred_harness_~#cur~3#1.base_BEFORE_CALL_76|) 0) 18446744073709551616) 0)))) is different from true [2022-11-25 16:53:02,696 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 16:53:02,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 25 [2022-11-25 16:53:18,067 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 110 proven. 85 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-25 16:53:18,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:53:19,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908514983] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:53:19,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:53:19,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 27] total 43 [2022-11-25 16:53:19,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833907842] [2022-11-25 16:53:19,463 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 16:53:19,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-25 16:53:19,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:53:19,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-25 16:53:19,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1646, Unknown=12, NotChecked=166, Total=1980 [2022-11-25 16:53:19,466 INFO L87 Difference]: Start difference. First operand 309 states and 335 transitions. Second operand has 43 states, 42 states have (on average 3.5952380952380953) internal successors, (151), 38 states have internal predecessors, (151), 19 states have call successors, (40), 9 states have call predecessors, (40), 13 states have return successors, (39), 20 states have call predecessors, (39), 19 states have call successors, (39) [2022-11-25 16:53:23,950 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 16:53:32,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:53:37,275 WARN L539 Checker$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 16:53:39,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:53:41,414 WARN L539 Checker$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 16:53:43,429 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:53:45,446 WARN L539 Checker$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 16:53:47,470 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:53:49,554 WARN L539 Checker$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 16:53:51,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:53:54,295 WARN L539 Checker$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 16:53:58,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:54:00,578 WARN L539 Checker$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 16:54:02,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:54:04,890 WARN L539 Checker$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 16:54:06,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:54:09,037 WARN L539 Checker$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 16:54:11,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:54:13,089 WARN L539 Checker$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 16:54:15,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:54:17,217 WARN L539 Checker$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 16:54:19,297 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:54:21,408 WARN L539 Checker$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 16:54:23,493 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 16:54:36,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:54:36,181 INFO L93 Difference]: Finished difference Result 328 states and 358 transitions. [2022-11-25 16:54:36,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-25 16:54:36,182 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 3.5952380952380953) internal successors, (151), 38 states have internal predecessors, (151), 19 states have call successors, (40), 9 states have call predecessors, (40), 13 states have return successors, (39), 20 states have call predecessors, (39), 19 states have call successors, (39) Word has length 169 [2022-11-25 16:54:36,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:54:36,184 INFO L225 Difference]: With dead ends: 328 [2022-11-25 16:54:36,184 INFO L226 Difference]: Without dead ends: 287 [2022-11-25 16:54:36,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 221 SyntacticMatches, 15 SemanticMatches, 87 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2426 ImplicationChecksByTransitivity, 68.0s TimeCoverageRelationStatistics Valid=844, Invalid=6630, Unknown=16, NotChecked=342, Total=7832 [2022-11-25 16:54:36,186 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 472 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 3296 mSolverCounterSat, 350 mSolverCounterUnsat, 31 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 59.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 4094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 3296 IncrementalHoareTripleChecker+Invalid, 31 IncrementalHoareTripleChecker+Unknown, 417 IncrementalHoareTripleChecker+Unchecked, 60.3s IncrementalHoareTripleChecker+Time [2022-11-25 16:54:36,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [485 Valid, 439 Invalid, 4094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 3296 Invalid, 31 Unknown, 417 Unchecked, 60.3s Time] [2022-11-25 16:54:36,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-11-25 16:54:36,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 267. [2022-11-25 16:54:36,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 199 states have (on average 1.0753768844221105) internal successors, (214), 203 states have internal predecessors, (214), 37 states have call successors, (37), 30 states have call predecessors, (37), 30 states have return successors, (36), 33 states have call predecessors, (36), 33 states have call successors, (36) [2022-11-25 16:54:36,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 287 transitions. [2022-11-25 16:54:36,241 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 287 transitions. Word has length 169 [2022-11-25 16:54:36,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:54:36,242 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 287 transitions. [2022-11-25 16:54:36,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 3.5952380952380953) internal successors, (151), 38 states have internal predecessors, (151), 19 states have call successors, (40), 9 states have call predecessors, (40), 13 states have return successors, (39), 20 states have call predecessors, (39), 19 states have call successors, (39) [2022-11-25 16:54:36,242 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 287 transitions. [2022-11-25 16:54:36,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-11-25 16:54:36,243 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:54:36,243 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:54:36,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-25 16:54:36,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-25 16:54:36,459 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:54:36,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:54:36,459 INFO L85 PathProgramCache]: Analyzing trace with hash 755558594, now seen corresponding path program 1 times [2022-11-25 16:54:36,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:54:36,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4547790] [2022-11-25 16:54:36,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:54:36,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:54:37,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:39,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 16:54:39,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:39,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 16:54:39,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:39,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-25 16:54:39,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:40,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:54:40,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:40,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-25 16:54:40,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:40,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-25 16:54:40,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:40,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-25 16:54:40,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:40,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-11-25 16:54:40,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:41,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:54:41,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:41,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-25 16:54:41,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:41,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-25 16:54:41,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:41,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-25 16:54:41,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:41,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-25 16:54:41,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:41,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-25 16:54:41,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:41,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-11-25 16:54:41,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:41,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-11-25 16:54:41,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:41,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-11-25 16:54:41,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:41,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-11-25 16:54:41,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:41,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-11-25 16:54:41,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:41,652 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-11-25 16:54:41,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:54:41,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4547790] [2022-11-25 16:54:41,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4547790] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:54:41,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:54:41,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-11-25 16:54:41,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085673541] [2022-11-25 16:54:41,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:54:41,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 16:54:41,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:54:41,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 16:54:41,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2022-11-25 16:54:41,655 INFO L87 Difference]: Start difference. First operand 267 states and 287 transitions. Second operand has 25 states, 23 states have (on average 2.782608695652174) internal successors, (64), 21 states have internal predecessors, (64), 12 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (19), 12 states have call predecessors, (19), 11 states have call successors, (19) [2022-11-25 16:54:46,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:54:46,917 INFO L93 Difference]: Finished difference Result 299 states and 327 transitions. [2022-11-25 16:54:46,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 16:54:46,918 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.782608695652174) internal successors, (64), 21 states have internal predecessors, (64), 12 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (19), 12 states have call predecessors, (19), 11 states have call successors, (19) Word has length 172 [2022-11-25 16:54:46,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:54:46,919 INFO L225 Difference]: With dead ends: 299 [2022-11-25 16:54:46,920 INFO L226 Difference]: Without dead ends: 286 [2022-11-25 16:54:46,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=160, Invalid=1246, Unknown=0, NotChecked=0, Total=1406 [2022-11-25 16:54:46,921 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 128 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 1469 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 1564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:54:46,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 388 Invalid, 1564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1469 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-11-25 16:54:46,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2022-11-25 16:54:47,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 281. [2022-11-25 16:54:47,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 207 states have (on average 1.0724637681159421) internal successors, (222), 212 states have internal predecessors, (222), 41 states have call successors, (41), 30 states have call predecessors, (41), 32 states have return successors, (43), 38 states have call predecessors, (43), 37 states have call successors, (43) [2022-11-25 16:54:47,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 306 transitions. [2022-11-25 16:54:47,017 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 306 transitions. Word has length 172 [2022-11-25 16:54:47,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:54:47,018 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 306 transitions. [2022-11-25 16:54:47,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.782608695652174) internal successors, (64), 21 states have internal predecessors, (64), 12 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (19), 12 states have call predecessors, (19), 11 states have call successors, (19) [2022-11-25 16:54:47,018 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 306 transitions. [2022-11-25 16:54:47,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-11-25 16:54:47,020 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:54:47,020 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:54:47,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-11-25 16:54:47,021 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:54:47,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:54:47,021 INFO L85 PathProgramCache]: Analyzing trace with hash -637391594, now seen corresponding path program 2 times [2022-11-25 16:54:47,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:54:47,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109204850] [2022-11-25 16:54:47,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:54:47,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:54:49,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:55:02,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 16:55:02,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:55:02,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 16:55:02,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:55:02,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-25 16:55:02,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:55:03,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:55:03,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:55:03,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-25 16:55:03,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:55:04,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-25 16:55:04,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:55:04,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-25 16:55:04,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:55:04,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-11-25 16:55:04,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:55:12,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:55:12,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:55:12,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-25 16:55:12,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:55:12,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-25 16:55:12,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:55:13,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-25 16:55:13,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:55:13,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-25 16:55:13,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:55:14,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-25 16:55:14,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:55:14,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-11-25 16:55:14,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:55:14,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-25 16:55:14,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:55:14,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-11-25 16:55:14,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:55:14,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2022-11-25 16:55:14,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:55:14,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-11-25 16:55:14,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:55:14,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2022-11-25 16:55:14,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:55:14,653 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 29 proven. 79 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-11-25 16:55:14,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:55:14,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109204850] [2022-11-25 16:55:14,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109204850] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:55:14,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84515799] [2022-11-25 16:55:14,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 16:55:14,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:55:14,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:55:14,656 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:55:14,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648fd4c3-79d0-415a-afec-4396013953e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-25 16:55:15,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 16:55:15,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:55:15,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 2879 conjuncts, 222 conjunts are in the unsatisfiable core [2022-11-25 16:55:15,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:55:15,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 16:55:19,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-25 16:55:20,802 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 16:55:20,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-25 16:55:21,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:55:21,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-25 16:55:21,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 16:55:21,921 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 16:55:25,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:55:25,724 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 16:55:25,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 35 [2022-11-25 16:55:26,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 16:55:26,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 44 [2022-11-25 16:55:26,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2022-11-25 16:55:29,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:55:29,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 91 [2022-11-25 16:55:29,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:55:29,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:55:29,632 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-25 16:55:29,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 2 case distinctions, treesize of input 115 treesize of output 110 [2022-11-25 16:55:29,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:55:29,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 122 [2022-11-25 16:55:30,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:55:30,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:55:30,529 INFO L321 Elim1Store]: treesize reduction 60, result has 26.8 percent of original size [2022-11-25 16:55:30,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 36 [2022-11-25 16:55:32,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-25 16:55:33,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 16:55:33,847 INFO L321 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2022-11-25 16:55:33,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 32 [2022-11-25 16:55:33,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-25 16:55:33,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 16:55:33,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7