./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_from_whole_string_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_from_whole_string_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN --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 7d9514ee1b6f3a0027f117bcf81d6b26d525fe99251459ecef3c46cad248dd1f --- 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-6b4ec56 [2022-11-20 12:01:15,729 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 12:01:15,731 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 12:01:15,772 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 12:01:15,773 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 12:01:15,774 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 12:01:15,775 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 12:01:15,777 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 12:01:15,783 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 12:01:15,791 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 12:01:15,792 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 12:01:15,796 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 12:01:15,796 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 12:01:15,799 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 12:01:15,801 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 12:01:15,804 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 12:01:15,806 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 12:01:15,807 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 12:01:15,808 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 12:01:15,814 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 12:01:15,816 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 12:01:15,817 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 12:01:15,818 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 12:01:15,819 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 12:01:15,822 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 12:01:15,823 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 12:01:15,823 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 12:01:15,824 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 12:01:15,824 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 12:01:15,825 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 12:01:15,826 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 12:01:15,826 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 12:01:15,827 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 12:01:15,828 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 12:01:15,829 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 12:01:15,829 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 12:01:15,833 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 12:01:15,834 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 12:01:15,834 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 12:01:15,837 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 12:01:15,839 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 12:01:15,840 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-20 12:01:15,882 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 12:01:15,882 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 12:01:15,883 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 12:01:15,883 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 12:01:15,884 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 12:01:15,884 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 12:01:15,884 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 12:01:15,885 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 12:01:15,885 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 12:01:15,885 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 12:01:15,886 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 12:01:15,886 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 12:01:15,887 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 12:01:15,887 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 12:01:15,887 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 12:01:15,887 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 12:01:15,887 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 12:01:15,888 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 12:01:15,888 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 12:01:15,888 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 12:01:15,888 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 12:01:15,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:01:15,889 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 12:01:15,889 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 12:01:15,889 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 12:01:15,889 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 12:01:15,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 12:01:15,890 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 12:01:15,890 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 12:01:15,891 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 12:01:15,891 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7d9514ee1b6f3a0027f117bcf81d6b26d525fe99251459ecef3c46cad248dd1f [2022-11-20 12:01:16,150 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 12:01:16,184 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 12:01:16,187 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 12:01:16,189 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 12:01:16,189 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 12:01:16,191 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_from_whole_string_harness.i [2022-11-20 12:01:19,223 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 12:01:19,800 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 12:01:19,801 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_from_whole_string_harness.i [2022-11-20 12:01:19,854 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/data/ec0fb2d28/d63761e374dc4f599a8afe4b1c60e8b5/FLAG6a5e7c498 [2022-11-20 12:01:19,875 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/data/ec0fb2d28/d63761e374dc4f599a8afe4b1c60e8b5 [2022-11-20 12:01:19,879 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 12:01:19,881 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 12:01:19,883 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 12:01:19,883 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 12:01:19,887 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 12:01:19,888 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:01:19" (1/1) ... [2022-11-20 12:01:19,889 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@98cbe4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:01:19, skipping insertion in model container [2022-11-20 12:01:19,889 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:01:19" (1/1) ... [2022-11-20 12:01:19,897 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 12:01:20,053 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 12:01:20,398 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_b2ff7738-2463-47db-b5a4-ec9253801225/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_from_whole_string_harness.i[4510,4523] [2022-11-20 12:01:20,406 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_b2ff7738-2463-47db-b5a4-ec9253801225/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_from_whole_string_harness.i[4570,4583] [2022-11-20 12:01:21,424 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 12:01:21,426 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 12:01:21,427 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 12:01:21,428 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 12:01:21,429 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 12:01:21,443 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 12:01:21,447 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 12:01:21,450 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 12:01:21,455 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 12:01:21,460 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 12:01:21,467 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 12:01:21,468 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 12:01:21,469 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 12:01:21,986 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-20 12:01:21,988 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-20 12:01:21,990 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-20 12:01:21,992 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-20 12:01:21,993 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-20 12:01:21,994 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-20 12:01:21,995 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-20 12:01:21,996 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-20 12:01:21,996 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-20 12:01:21,997 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-20 12:01:22,214 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-20 12:01:22,235 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 12:01:22,242 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 12:01:22,339 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 12:01:22,339 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 12:01:22,434 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:01:22,486 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 12:01:22,517 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_b2ff7738-2463-47db-b5a4-ec9253801225/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_from_whole_string_harness.i[4510,4523] [2022-11-20 12:01:22,517 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_b2ff7738-2463-47db-b5a4-ec9253801225/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_from_whole_string_harness.i[4570,4583] [2022-11-20 12:01:22,565 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 12:01:22,566 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 12:01:22,566 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 12:01:22,567 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 12:01:22,567 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 12:01:22,572 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 12:01:22,573 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 12:01:22,574 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 12:01:22,574 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 12:01:22,575 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 12:01:22,576 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 12:01:22,576 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 12:01:22,577 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 12:01:22,630 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-20 12:01:22,632 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-20 12:01:22,632 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-20 12:01:22,633 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-20 12:01:22,634 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-20 12:01:22,634 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-20 12:01:22,635 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-20 12:01:22,635 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-20 12:01:22,636 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-20 12:01:22,636 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-20 12:01:22,675 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-20 12:01:22,692 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 12:01:22,697 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 12:01:22,749 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 12:01:22,749 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 12:01:22,824 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:01:23,073 INFO L208 MainTranslator]: Completed translation [2022-11-20 12:01:23,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:01:23 WrapperNode [2022-11-20 12:01:23,074 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 12:01:23,075 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 12:01:23,075 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 12:01:23,075 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 12:01:23,082 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:01:23" (1/1) ... [2022-11-20 12:01:23,192 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:01:23" (1/1) ... [2022-11-20 12:01:23,299 INFO L138 Inliner]: procedures = 695, calls = 3052, calls flagged for inlining = 70, calls inlined = 10, statements flattened = 962 [2022-11-20 12:01:23,300 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 12:01:23,301 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 12:01:23,302 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 12:01:23,302 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 12:01:23,312 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:01:23" (1/1) ... [2022-11-20 12:01:23,312 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:01:23" (1/1) ... [2022-11-20 12:01:23,340 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:01:23" (1/1) ... [2022-11-20 12:01:23,341 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:01:23" (1/1) ... [2022-11-20 12:01:23,450 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:01:23" (1/1) ... [2022-11-20 12:01:23,455 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:01:23" (1/1) ... [2022-11-20 12:01:23,462 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:01:23" (1/1) ... [2022-11-20 12:01:23,476 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:01:23" (1/1) ... [2022-11-20 12:01:23,500 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 12:01:23,501 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 12:01:23,507 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 12:01:23,507 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 12:01:23,508 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:01:23" (1/1) ... [2022-11-20 12:01:23,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:01:23,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:01:23,545 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 12:01:23,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 12:01:23,594 INFO L130 BoogieDeclarations]: Found specification of procedure aws_string_is_valid [2022-11-20 12:01:23,594 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_string_is_valid [2022-11-20 12:01:23,595 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2022-11-20 12:01:23,595 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2022-11-20 12:01:23,595 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_string_is_allocated_bounded_length [2022-11-20 12:01:23,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_string_is_allocated_bounded_length [2022-11-20 12:01:23,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 12:01:23,596 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-11-20 12:01:23,597 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-11-20 12:01:23,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~real [2022-11-20 12:01:23,597 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-20 12:01:23,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-20 12:01:23,597 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 12:01:23,597 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-20 12:01:23,598 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-20 12:01:23,599 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-20 12:01:23,599 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-20 12:01:23,599 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 12:01:23,599 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 12:01:23,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-20 12:01:23,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 12:01:23,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 12:01:23,600 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-11-20 12:01:23,600 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-11-20 12:01:23,601 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2022-11-20 12:01:23,601 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2022-11-20 12:01:23,601 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-20 12:01:23,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-20 12:01:23,601 INFO L130 BoogieDeclarations]: Found specification of procedure aws_string_bytes [2022-11-20 12:01:23,601 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_string_bytes [2022-11-20 12:01:23,602 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-20 12:01:23,602 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-20 12:01:23,602 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 12:01:23,602 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-20 12:01:23,602 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_write [2022-11-20 12:01:23,603 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_write [2022-11-20 12:01:23,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-20 12:01:23,603 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2022-11-20 12:01:23,603 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2022-11-20 12:01:23,604 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-20 12:01:23,604 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-20 12:01:23,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 12:01:23,604 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~real [2022-11-20 12:01:23,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 12:01:23,947 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 12:01:23,963 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 12:01:25,488 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 12:01:25,496 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 12:01:25,496 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-20 12:01:25,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:01:25 BoogieIcfgContainer [2022-11-20 12:01:25,499 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 12:01:25,501 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 12:01:25,501 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 12:01:25,505 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 12:01:25,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 12:01:19" (1/3) ... [2022-11-20 12:01:25,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bd3f637 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:01:25, skipping insertion in model container [2022-11-20 12:01:25,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:01:23" (2/3) ... [2022-11-20 12:01:25,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bd3f637 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:01:25, skipping insertion in model container [2022-11-20 12:01:25,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:01:25" (3/3) ... [2022-11-20 12:01:25,508 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_write_from_whole_string_harness.i [2022-11-20 12:01:25,526 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 12:01:25,527 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 12:01:25,579 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 12:01:25,586 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;@39e59a27, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 12:01:25,586 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 12:01:25,591 INFO L276 IsEmpty]: Start isEmpty. Operand has 181 states, 118 states have (on average 1.2627118644067796) internal successors, (149), 119 states have internal predecessors, (149), 48 states have call successors, (48), 13 states have call predecessors, (48), 13 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2022-11-20 12:01:25,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-20 12:01:25,603 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:01:25,604 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 12:01:25,604 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:01:25,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:01:25,610 INFO L85 PathProgramCache]: Analyzing trace with hash 2068648462, now seen corresponding path program 1 times [2022-11-20 12:01:25,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:01:25,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451708835] [2022-11-20 12:01:25,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:01:25,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:01:26,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:26,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:01:26,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:26,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:01:26,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:26,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 12:01:26,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:26,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 12:01:26,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:26,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-20 12:01:26,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:26,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-20 12:01:26,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:26,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-20 12:01:26,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:26,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-11-20 12:01:26,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:26,465 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 12:01:26,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:01:26,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451708835] [2022-11-20 12:01:26,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451708835] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:01:26,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:01:26,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:01:26,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227851237] [2022-11-20 12:01:26,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:01:26,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:01:26,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:01:26,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:01:26,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:01:26,528 INFO L87 Difference]: Start difference. First operand has 181 states, 118 states have (on average 1.2627118644067796) internal successors, (149), 119 states have internal predecessors, (149), 48 states have call successors, (48), 13 states have call predecessors, (48), 13 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-20 12:01:27,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:01:27,049 INFO L93 Difference]: Finished difference Result 353 states and 507 transitions. [2022-11-20 12:01:27,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:01:27,052 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 62 [2022-11-20 12:01:27,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:01:27,066 INFO L225 Difference]: With dead ends: 353 [2022-11-20 12:01:27,066 INFO L226 Difference]: Without dead ends: 176 [2022-11-20 12:01:27,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:01:27,084 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 85 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 12:01:27,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 217 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 12:01:27,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-11-20 12:01:27,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2022-11-20 12:01:27,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 114 states have (on average 1.2543859649122806) internal successors, (143), 115 states have internal predecessors, (143), 48 states have call successors, (48), 13 states have call predecessors, (48), 13 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2022-11-20 12:01:27,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 238 transitions. [2022-11-20 12:01:27,168 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 238 transitions. Word has length 62 [2022-11-20 12:01:27,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:01:27,169 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 238 transitions. [2022-11-20 12:01:27,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-20 12:01:27,170 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 238 transitions. [2022-11-20 12:01:27,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-20 12:01:27,182 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:01:27,182 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 12:01:27,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 12:01:27,184 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:01:27,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:01:27,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1920990774, now seen corresponding path program 1 times [2022-11-20 12:01:27,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:01:27,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018077684] [2022-11-20 12:01:27,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:01:27,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:01:27,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:27,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:01:27,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:27,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:01:27,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:27,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 12:01:27,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:27,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 12:01:27,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:28,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-20 12:01:28,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:28,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-20 12:01:28,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:28,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-20 12:01:28,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:28,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-11-20 12:01:28,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:28,090 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 12:01:28,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:01:28,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018077684] [2022-11-20 12:01:28,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018077684] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:01:28,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:01:28,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 12:01:28,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27146715] [2022-11-20 12:01:28,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:01:28,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 12:01:28,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:01:28,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 12:01:28,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:01:28,095 INFO L87 Difference]: Start difference. First operand 176 states and 238 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-20 12:01:29,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:01:29,156 INFO L93 Difference]: Finished difference Result 313 states and 431 transitions. [2022-11-20 12:01:29,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:01:29,157 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 62 [2022-11-20 12:01:29,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:01:29,160 INFO L225 Difference]: With dead ends: 313 [2022-11-20 12:01:29,160 INFO L226 Difference]: Without dead ends: 179 [2022-11-20 12:01:29,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-20 12:01:29,162 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 158 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:01:29,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 448 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 12:01:29,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-11-20 12:01:29,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2022-11-20 12:01:29,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 116 states have (on average 1.25) internal successors, (145), 118 states have internal predecessors, (145), 48 states have call successors, (48), 13 states have call predecessors, (48), 14 states have return successors, (51), 47 states have call predecessors, (51), 47 states have call successors, (51) [2022-11-20 12:01:29,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 244 transitions. [2022-11-20 12:01:29,182 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 244 transitions. Word has length 62 [2022-11-20 12:01:29,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:01:29,183 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 244 transitions. [2022-11-20 12:01:29,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-20 12:01:29,183 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 244 transitions. [2022-11-20 12:01:29,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-20 12:01:29,185 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:01:29,185 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 12:01:29,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 12:01:29,186 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:01:29,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:01:29,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1913019893, now seen corresponding path program 1 times [2022-11-20 12:01:29,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:01:29,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713896624] [2022-11-20 12:01:29,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:01:29,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:01:29,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:30,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:01:30,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:30,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:01:30,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:30,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 12:01:30,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:30,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 12:01:30,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:30,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-20 12:01:30,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:30,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-20 12:01:30,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:30,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-20 12:01:30,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:30,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-20 12:01:30,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:30,558 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 12:01:30,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:01:30,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713896624] [2022-11-20 12:01:30,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713896624] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:01:30,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:01:30,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 12:01:30,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492174360] [2022-11-20 12:01:30,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:01:30,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 12:01:30,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:01:30,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 12:01:30,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-20 12:01:30,566 INFO L87 Difference]: Start difference. First operand 179 states and 244 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 6 states have internal predecessors, (40), 4 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-20 12:01:31,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:01:31,827 INFO L93 Difference]: Finished difference Result 187 states and 252 transitions. [2022-11-20 12:01:31,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 12:01:31,828 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 6 states have internal predecessors, (40), 4 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 68 [2022-11-20 12:01:31,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:01:31,830 INFO L225 Difference]: With dead ends: 187 [2022-11-20 12:01:31,831 INFO L226 Difference]: Without dead ends: 185 [2022-11-20 12:01:31,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-20 12:01:31,832 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 191 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:01:31,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 506 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-20 12:01:31,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-20 12:01:31,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 183. [2022-11-20 12:01:31,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 119 states have (on average 1.2436974789915967) internal successors, (148), 121 states have internal predecessors, (148), 48 states have call successors, (48), 14 states have call predecessors, (48), 15 states have return successors, (51), 47 states have call predecessors, (51), 47 states have call successors, (51) [2022-11-20 12:01:31,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 247 transitions. [2022-11-20 12:01:31,850 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 247 transitions. Word has length 68 [2022-11-20 12:01:31,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:01:31,851 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 247 transitions. [2022-11-20 12:01:31,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 6 states have internal predecessors, (40), 4 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-20 12:01:31,852 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 247 transitions. [2022-11-20 12:01:31,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-20 12:01:31,853 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:01:31,853 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-11-20 12:01:31,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 12:01:31,854 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:01:31,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:01:31,854 INFO L85 PathProgramCache]: Analyzing trace with hash 25473955, now seen corresponding path program 1 times [2022-11-20 12:01:31,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:01:31,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150359603] [2022-11-20 12:01:31,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:01:31,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:01:32,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:34,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:01:34,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:34,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:01:34,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:34,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 12:01:34,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:34,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 12:01:34,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:34,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-20 12:01:34,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:34,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-20 12:01:34,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:34,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-20 12:01:34,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:34,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-20 12:01:34,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:34,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-20 12:01:34,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:34,296 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 12:01:34,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:01:34,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150359603] [2022-11-20 12:01:34,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150359603] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:01:34,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:01:34,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-20 12:01:34,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801935300] [2022-11-20 12:01:34,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:01:34,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 12:01:34,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:01:34,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 12:01:34,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-20 12:01:34,301 INFO L87 Difference]: Start difference. First operand 183 states and 247 transitions. Second operand has 9 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-20 12:01:35,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:01:35,990 INFO L93 Difference]: Finished difference Result 249 states and 347 transitions. [2022-11-20 12:01:35,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 12:01:35,991 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 74 [2022-11-20 12:01:35,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:01:35,993 INFO L225 Difference]: With dead ends: 249 [2022-11-20 12:01:35,994 INFO L226 Difference]: Without dead ends: 247 [2022-11-20 12:01:35,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-11-20 12:01:35,995 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 180 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 1205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-20 12:01:35,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 579 Invalid, 1205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1109 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-20 12:01:35,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-11-20 12:01:36,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 205. [2022-11-20 12:01:36,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 134 states have (on average 1.2537313432835822) internal successors, (168), 137 states have internal predecessors, (168), 54 states have call successors, (54), 15 states have call predecessors, (54), 16 states have return successors, (58), 52 states have call predecessors, (58), 53 states have call successors, (58) [2022-11-20 12:01:36,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 280 transitions. [2022-11-20 12:01:36,021 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 280 transitions. Word has length 74 [2022-11-20 12:01:36,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:01:36,021 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 280 transitions. [2022-11-20 12:01:36,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-20 12:01:36,022 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 280 transitions. [2022-11-20 12:01:36,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-20 12:01:36,023 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:01:36,024 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 12:01:36,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 12:01:36,024 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:01:36,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:01:36,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1025654737, now seen corresponding path program 1 times [2022-11-20 12:01:36,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:01:36,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212791422] [2022-11-20 12:01:36,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:01:36,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:01:36,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:36,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:01:36,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:36,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:01:36,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:36,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 12:01:36,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:36,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 12:01:36,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:36,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-20 12:01:36,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:36,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-20 12:01:36,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:36,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-20 12:01:36,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:36,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-20 12:01:36,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:36,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-20 12:01:36,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:36,571 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 12:01:36,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:01:36,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212791422] [2022-11-20 12:01:36,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212791422] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:01:36,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:01:36,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 12:01:36,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587624904] [2022-11-20 12:01:36,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:01:36,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 12:01:36,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:01:36,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 12:01:36,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:01:36,573 INFO L87 Difference]: Start difference. First operand 205 states and 280 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 3 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-20 12:01:37,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:01:37,402 INFO L93 Difference]: Finished difference Result 337 states and 469 transitions. [2022-11-20 12:01:37,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 12:01:37,403 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 3 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 75 [2022-11-20 12:01:37,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:01:37,405 INFO L225 Difference]: With dead ends: 337 [2022-11-20 12:01:37,405 INFO L226 Difference]: Without dead ends: 272 [2022-11-20 12:01:37,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:01:37,406 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 108 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 12:01:37,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 432 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 12:01:37,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-11-20 12:01:37,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 253. [2022-11-20 12:01:37,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 166 states have (on average 1.2530120481927711) internal successors, (208), 169 states have internal predecessors, (208), 70 states have call successors, (70), 15 states have call predecessors, (70), 16 states have return successors, (76), 68 states have call predecessors, (76), 69 states have call successors, (76) [2022-11-20 12:01:37,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 354 transitions. [2022-11-20 12:01:37,479 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 354 transitions. Word has length 75 [2022-11-20 12:01:37,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:01:37,480 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 354 transitions. [2022-11-20 12:01:37,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 3 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-20 12:01:37,480 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 354 transitions. [2022-11-20 12:01:37,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-20 12:01:37,482 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:01:37,482 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-11-20 12:01:37,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 12:01:37,483 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:01:37,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:01:37,483 INFO L85 PathProgramCache]: Analyzing trace with hash -466462769, now seen corresponding path program 1 times [2022-11-20 12:01:37,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:01:37,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073486021] [2022-11-20 12:01:37,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:01:37,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:01:37,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:39,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:01:39,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:39,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:01:39,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:39,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 12:01:39,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:39,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 12:01:39,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:39,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-20 12:01:39,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:39,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-20 12:01:39,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:39,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-20 12:01:39,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:39,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-20 12:01:39,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:39,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-20 12:01:39,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:39,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-11-20 12:01:39,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:39,439 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-20 12:01:39,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:01:39,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073486021] [2022-11-20 12:01:39,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073486021] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:01:39,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:01:39,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-20 12:01:39,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771819492] [2022-11-20 12:01:39,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:01:39,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 12:01:39,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:01:39,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 12:01:39,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-20 12:01:39,442 INFO L87 Difference]: Start difference. First operand 253 states and 354 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 9 states have internal predecessors, (45), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-20 12:01:41,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:01:41,451 INFO L93 Difference]: Finished difference Result 498 states and 717 transitions. [2022-11-20 12:01:41,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 12:01:41,451 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 9 states have internal predecessors, (45), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 80 [2022-11-20 12:01:41,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:01:41,454 INFO L225 Difference]: With dead ends: 498 [2022-11-20 12:01:41,454 INFO L226 Difference]: Without dead ends: 297 [2022-11-20 12:01:41,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-11-20 12:01:41,456 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 274 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 1415 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 768 SdHoareTripleChecker+Invalid, 1522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-20 12:01:41,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 768 Invalid, 1522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1415 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-20 12:01:41,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-11-20 12:01:41,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 290. [2022-11-20 12:01:41,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 188 states have (on average 1.25) internal successors, (235), 192 states have internal predecessors, (235), 84 states have call successors, (84), 15 states have call predecessors, (84), 17 states have return successors, (98), 82 states have call predecessors, (98), 83 states have call successors, (98) [2022-11-20 12:01:41,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 417 transitions. [2022-11-20 12:01:41,514 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 417 transitions. Word has length 80 [2022-11-20 12:01:41,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:01:41,516 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 417 transitions. [2022-11-20 12:01:41,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 9 states have internal predecessors, (45), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-20 12:01:41,516 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 417 transitions. [2022-11-20 12:01:41,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-20 12:01:41,518 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:01:41,518 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-11-20 12:01:41,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 12:01:41,519 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:01:41,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:01:41,519 INFO L85 PathProgramCache]: Analyzing trace with hash -669150121, now seen corresponding path program 1 times [2022-11-20 12:01:41,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:01:41,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285322143] [2022-11-20 12:01:41,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:01:41,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:01:41,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:42,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:01:42,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:42,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:01:42,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:42,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 12:01:42,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:42,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 12:01:42,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:42,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-20 12:01:42,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:42,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-20 12:01:42,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:42,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-20 12:01:42,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:42,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-11-20 12:01:42,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:42,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-20 12:01:42,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:42,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-11-20 12:01:42,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:42,545 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-20 12:01:42,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:01:42,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285322143] [2022-11-20 12:01:42,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285322143] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:01:42,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530252833] [2022-11-20 12:01:42,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:01:42,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:01:42,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:01:42,554 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:01:42,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 12:01:43,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:43,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 2643 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 12:01:43,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:01:43,533 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-20 12:01:43,533 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:01:43,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530252833] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:01:43,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:01:43,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2022-11-20 12:01:43,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601324217] [2022-11-20 12:01:43,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:01:43,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 12:01:43,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:01:43,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 12:01:43,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-11-20 12:01:43,536 INFO L87 Difference]: Start difference. First operand 290 states and 417 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-20 12:01:43,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:01:43,932 INFO L93 Difference]: Finished difference Result 546 states and 819 transitions. [2022-11-20 12:01:43,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 12:01:43,932 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 84 [2022-11-20 12:01:43,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:01:43,935 INFO L225 Difference]: With dead ends: 546 [2022-11-20 12:01:43,935 INFO L226 Difference]: Without dead ends: 308 [2022-11-20 12:01:43,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-11-20 12:01:43,937 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 40 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 843 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:01:43,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 843 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 106 Invalid, 0 Unknown, 49 Unchecked, 0.3s Time] [2022-11-20 12:01:43,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-11-20 12:01:43,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 295. [2022-11-20 12:01:43,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 193 states have (on average 1.2538860103626943) internal successors, (242), 197 states have internal predecessors, (242), 84 states have call successors, (84), 15 states have call predecessors, (84), 17 states have return successors, (98), 82 states have call predecessors, (98), 83 states have call successors, (98) [2022-11-20 12:01:43,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 424 transitions. [2022-11-20 12:01:43,989 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 424 transitions. Word has length 84 [2022-11-20 12:01:43,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:01:43,989 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 424 transitions. [2022-11-20 12:01:43,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-20 12:01:43,989 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 424 transitions. [2022-11-20 12:01:43,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-20 12:01:43,991 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:01:43,991 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-11-20 12:01:44,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 12:01:44,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:01:44,200 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:01:44,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:01:44,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1150230379, now seen corresponding path program 1 times [2022-11-20 12:01:44,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:01:44,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602693085] [2022-11-20 12:01:44,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:01:44,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:01:44,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:45,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:01:45,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:45,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:01:45,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:45,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 12:01:45,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:45,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 12:01:45,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:45,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-20 12:01:45,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:45,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-20 12:01:45,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:45,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-20 12:01:45,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:45,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-11-20 12:01:45,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:45,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-20 12:01:45,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:45,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-11-20 12:01:45,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:45,238 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-20 12:01:45,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:01:45,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602693085] [2022-11-20 12:01:45,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602693085] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:01:45,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828283371] [2022-11-20 12:01:45,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:01:45,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:01:45,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:01:45,240 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:01:45,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 12:01:45,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:45,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 2638 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 12:01:45,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:01:45,946 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 12:01:45,947 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:01:45,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828283371] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:01:45,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:01:45,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 11 [2022-11-20 12:01:45,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087112724] [2022-11-20 12:01:45,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:01:45,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 12:01:45,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:01:45,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 12:01:45,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-11-20 12:01:45,950 INFO L87 Difference]: Start difference. First operand 295 states and 424 transitions. Second operand has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-20 12:01:46,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:01:46,183 INFO L93 Difference]: Finished difference Result 543 states and 795 transitions. [2022-11-20 12:01:46,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 12:01:46,184 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 84 [2022-11-20 12:01:46,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:01:46,187 INFO L225 Difference]: With dead ends: 543 [2022-11-20 12:01:46,187 INFO L226 Difference]: Without dead ends: 300 [2022-11-20 12:01:46,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-11-20 12:01:46,190 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 13 mSDsluCounter, 1525 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1751 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:01:46,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 1751 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:01:46,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-11-20 12:01:46,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 300. [2022-11-20 12:01:46,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 197 states have (on average 1.248730964467005) internal successors, (246), 202 states have internal predecessors, (246), 84 states have call successors, (84), 15 states have call predecessors, (84), 18 states have return successors, (107), 82 states have call predecessors, (107), 83 states have call successors, (107) [2022-11-20 12:01:46,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 437 transitions. [2022-11-20 12:01:46,244 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 437 transitions. Word has length 84 [2022-11-20 12:01:46,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:01:46,245 INFO L495 AbstractCegarLoop]: Abstraction has 300 states and 437 transitions. [2022-11-20 12:01:46,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-20 12:01:46,245 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 437 transitions. [2022-11-20 12:01:46,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-20 12:01:46,248 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:01:46,248 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-11-20 12:01:46,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 12:01:46,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-20 12:01:46,458 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:01:46,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:01:46,459 INFO L85 PathProgramCache]: Analyzing trace with hash -843597830, now seen corresponding path program 1 times [2022-11-20 12:01:46,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:01:46,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226118433] [2022-11-20 12:01:46,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:01:46,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:01:46,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:46,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:01:46,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:46,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:01:46,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:46,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 12:01:46,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:46,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 12:01:46,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:46,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-20 12:01:46,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:46,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-20 12:01:46,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:46,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 12:01:46,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:46,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-20 12:01:46,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:46,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-11-20 12:01:46,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:46,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-20 12:01:46,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:46,860 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-20 12:01:46,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:01:46,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226118433] [2022-11-20 12:01:46,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226118433] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:01:46,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:01:46,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 12:01:46,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801266147] [2022-11-20 12:01:46,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:01:46,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 12:01:46,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:01:46,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 12:01:46,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:01:46,863 INFO L87 Difference]: Start difference. First operand 300 states and 437 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-20 12:01:47,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:01:47,595 INFO L93 Difference]: Finished difference Result 553 states and 825 transitions. [2022-11-20 12:01:47,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:01:47,596 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 86 [2022-11-20 12:01:47,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:01:47,598 INFO L225 Difference]: With dead ends: 553 [2022-11-20 12:01:47,598 INFO L226 Difference]: Without dead ends: 305 [2022-11-20 12:01:47,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-20 12:01:47,602 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 98 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 12:01:47,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 433 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 12:01:47,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-11-20 12:01:47,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 302. [2022-11-20 12:01:47,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 199 states have (on average 1.2462311557788945) internal successors, (248), 204 states have internal predecessors, (248), 84 states have call successors, (84), 15 states have call predecessors, (84), 18 states have return successors, (107), 82 states have call predecessors, (107), 83 states have call successors, (107) [2022-11-20 12:01:47,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 439 transitions. [2022-11-20 12:01:47,649 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 439 transitions. Word has length 86 [2022-11-20 12:01:47,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:01:47,649 INFO L495 AbstractCegarLoop]: Abstraction has 302 states and 439 transitions. [2022-11-20 12:01:47,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-20 12:01:47,650 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 439 transitions. [2022-11-20 12:01:47,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-20 12:01:47,653 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:01:47,653 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-11-20 12:01:47,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 12:01:47,653 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:01:47,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:01:47,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1121020610, now seen corresponding path program 1 times [2022-11-20 12:01:47,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:01:47,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6983892] [2022-11-20 12:01:47,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:01:47,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:01:47,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:47,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:01:47,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:47,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:01:47,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:47,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 12:01:47,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:47,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 12:01:47,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:47,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-20 12:01:47,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:47,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-20 12:01:47,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:47,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 12:01:47,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:47,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-20 12:01:47,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:47,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-11-20 12:01:47,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:47,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-20 12:01:47,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:48,003 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-20 12:01:48,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:01:48,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6983892] [2022-11-20 12:01:48,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6983892] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:01:48,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:01:48,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 12:01:48,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164127658] [2022-11-20 12:01:48,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:01:48,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 12:01:48,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:01:48,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 12:01:48,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:01:48,006 INFO L87 Difference]: Start difference. First operand 302 states and 439 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-20 12:01:48,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:01:48,741 INFO L93 Difference]: Finished difference Result 569 states and 858 transitions. [2022-11-20 12:01:48,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:01:48,742 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 86 [2022-11-20 12:01:48,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:01:48,744 INFO L225 Difference]: With dead ends: 569 [2022-11-20 12:01:48,744 INFO L226 Difference]: Without dead ends: 319 [2022-11-20 12:01:48,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-20 12:01:48,746 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 113 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 12:01:48,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 433 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 12:01:48,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-11-20 12:01:48,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 302. [2022-11-20 12:01:48,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 199 states have (on average 1.2412060301507537) internal successors, (247), 204 states have internal predecessors, (247), 84 states have call successors, (84), 15 states have call predecessors, (84), 18 states have return successors, (107), 82 states have call predecessors, (107), 83 states have call successors, (107) [2022-11-20 12:01:48,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 438 transitions. [2022-11-20 12:01:48,783 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 438 transitions. Word has length 86 [2022-11-20 12:01:48,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:01:48,784 INFO L495 AbstractCegarLoop]: Abstraction has 302 states and 438 transitions. [2022-11-20 12:01:48,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-20 12:01:48,784 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 438 transitions. [2022-11-20 12:01:48,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-20 12:01:48,786 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:01:48,786 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-11-20 12:01:48,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 12:01:48,786 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:01:48,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:01:48,787 INFO L85 PathProgramCache]: Analyzing trace with hash 265764800, now seen corresponding path program 1 times [2022-11-20 12:01:48,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:01:48,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16058311] [2022-11-20 12:01:48,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:01:48,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:01:49,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:53,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:01:53,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:53,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:01:53,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:53,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 12:01:53,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:53,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 12:01:53,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:53,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-20 12:01:53,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:53,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-20 12:01:53,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:53,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 12:01:53,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:53,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-20 12:01:53,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:53,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-11-20 12:01:53,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:53,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-20 12:01:53,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:53,132 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-20 12:01:53,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:01:53,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16058311] [2022-11-20 12:01:53,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16058311] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:01:53,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:01:53,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-20 12:01:53,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292542931] [2022-11-20 12:01:53,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:01:53,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 12:01:53,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:01:53,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 12:01:53,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-20 12:01:53,134 INFO L87 Difference]: Start difference. First operand 302 states and 438 transitions. Second operand has 9 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 5 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-20 12:01:54,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:01:54,935 INFO L93 Difference]: Finished difference Result 317 states and 458 transitions. [2022-11-20 12:01:54,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 12:01:54,936 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 5 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 86 [2022-11-20 12:01:54,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:01:54,938 INFO L225 Difference]: With dead ends: 317 [2022-11-20 12:01:54,938 INFO L226 Difference]: Without dead ends: 315 [2022-11-20 12:01:54,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-11-20 12:01:54,939 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 190 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 1210 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 1281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-20 12:01:54,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 639 Invalid, 1281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1210 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-20 12:01:54,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-11-20 12:01:54,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 306. [2022-11-20 12:01:54,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 202 states have (on average 1.2376237623762376) internal successors, (250), 207 states have internal predecessors, (250), 84 states have call successors, (84), 16 states have call predecessors, (84), 19 states have return successors, (107), 82 states have call predecessors, (107), 83 states have call successors, (107) [2022-11-20 12:01:54,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 441 transitions. [2022-11-20 12:01:54,980 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 441 transitions. Word has length 86 [2022-11-20 12:01:54,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:01:54,980 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 441 transitions. [2022-11-20 12:01:54,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 5 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-20 12:01:54,981 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 441 transitions. [2022-11-20 12:01:54,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-20 12:01:54,982 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:01:54,983 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:01:54,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 12:01:54,983 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:01:54,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:01:54,984 INFO L85 PathProgramCache]: Analyzing trace with hash -445771694, now seen corresponding path program 1 times [2022-11-20 12:01:54,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:01:54,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448830921] [2022-11-20 12:01:54,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:01:54,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:01:55,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:56,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:01:56,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:56,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:01:56,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:56,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 12:01:56,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:56,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 12:01:56,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:56,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-20 12:01:56,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:56,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-20 12:01:56,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:56,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-20 12:01:56,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:56,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-20 12:01:56,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:56,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-20 12:01:56,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:56,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-11-20 12:01:56,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:56,947 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-20 12:01:56,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:01:56,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448830921] [2022-11-20 12:01:56,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448830921] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:01:56,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:01:56,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-20 12:01:56,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523079707] [2022-11-20 12:01:56,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:01:56,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 12:01:56,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:01:56,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 12:01:56,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-20 12:01:56,950 INFO L87 Difference]: Start difference. First operand 306 states and 441 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 8 states have internal predecessors, (52), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-20 12:01:59,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:01:59,048 INFO L93 Difference]: Finished difference Result 640 states and 943 transitions. [2022-11-20 12:01:59,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 12:01:59,049 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 8 states have internal predecessors, (52), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 87 [2022-11-20 12:01:59,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:01:59,052 INFO L225 Difference]: With dead ends: 640 [2022-11-20 12:01:59,052 INFO L226 Difference]: Without dead ends: 458 [2022-11-20 12:01:59,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-11-20 12:01:59,054 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 288 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 1416 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 1512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-20 12:01:59,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 921 Invalid, 1512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1416 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-20 12:01:59,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-11-20 12:01:59,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 406. [2022-11-20 12:01:59,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 274 states have (on average 1.2408759124087592) internal successors, (340), 279 states have internal predecessors, (340), 110 states have call successors, (110), 17 states have call predecessors, (110), 21 states have return successors, (153), 109 states have call predecessors, (153), 109 states have call successors, (153) [2022-11-20 12:01:59,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 603 transitions. [2022-11-20 12:01:59,115 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 603 transitions. Word has length 87 [2022-11-20 12:01:59,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:01:59,116 INFO L495 AbstractCegarLoop]: Abstraction has 406 states and 603 transitions. [2022-11-20 12:01:59,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 8 states have internal predecessors, (52), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-20 12:01:59,116 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 603 transitions. [2022-11-20 12:01:59,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-20 12:01:59,118 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:01:59,118 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:01:59,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 12:01:59,119 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:01:59,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:01:59,119 INFO L85 PathProgramCache]: Analyzing trace with hash -926851952, now seen corresponding path program 1 times [2022-11-20 12:01:59,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:01:59,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775386593] [2022-11-20 12:01:59,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:01:59,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:01:59,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:02,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:02:02,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:02,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:02:02,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:02,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 12:02:02,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:03,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 12:02:03,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:03,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-20 12:02:03,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:03,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-20 12:02:03,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:03,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-20 12:02:03,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:03,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-20 12:02:03,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:03,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-20 12:02:03,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:03,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-11-20 12:02:03,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:03,112 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-20 12:02:03,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:02:03,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775386593] [2022-11-20 12:02:03,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775386593] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:02:03,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:02:03,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-20 12:02:03,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877949084] [2022-11-20 12:02:03,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:02:03,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 12:02:03,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:02:03,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 12:02:03,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-20 12:02:03,115 INFO L87 Difference]: Start difference. First operand 406 states and 603 transitions. Second operand has 14 states, 13 states have (on average 4.0) internal successors, (52), 11 states have internal predecessors, (52), 8 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-20 12:02:05,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:02:05,778 INFO L93 Difference]: Finished difference Result 461 states and 696 transitions. [2022-11-20 12:02:05,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 12:02:05,779 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.0) internal successors, (52), 11 states have internal predecessors, (52), 8 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 87 [2022-11-20 12:02:05,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:02:05,783 INFO L225 Difference]: With dead ends: 461 [2022-11-20 12:02:05,783 INFO L226 Difference]: Without dead ends: 459 [2022-11-20 12:02:05,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-11-20 12:02:05,785 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 344 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 1809 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 2034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 1809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:02:05,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 602 Invalid, 2034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 1809 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-20 12:02:05,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-11-20 12:02:05,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 418. [2022-11-20 12:02:05,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 283 states have (on average 1.2402826855123674) internal successors, (351), 289 states have internal predecessors, (351), 112 states have call successors, (112), 18 states have call predecessors, (112), 22 states have return successors, (155), 110 states have call predecessors, (155), 111 states have call successors, (155) [2022-11-20 12:02:05,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 618 transitions. [2022-11-20 12:02:05,867 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 618 transitions. Word has length 87 [2022-11-20 12:02:05,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:02:05,868 INFO L495 AbstractCegarLoop]: Abstraction has 418 states and 618 transitions. [2022-11-20 12:02:05,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.0) internal successors, (52), 11 states have internal predecessors, (52), 8 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-20 12:02:05,868 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 618 transitions. [2022-11-20 12:02:05,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-20 12:02:05,870 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:02:05,871 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:02:05,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 12:02:05,871 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:02:05,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:02:05,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1460101930, now seen corresponding path program 1 times [2022-11-20 12:02:05,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:02:05,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658807742] [2022-11-20 12:02:05,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:02:05,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:02:06,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:09,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:02:09,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:09,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:02:09,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:09,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 12:02:09,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:09,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 12:02:09,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:09,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-20 12:02:09,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:09,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-20 12:02:09,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:09,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 12:02:09,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:09,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-20 12:02:09,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:09,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-11-20 12:02:09,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:09,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-20 12:02:09,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:09,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-11-20 12:02:09,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:09,361 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-20 12:02:09,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:02:09,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658807742] [2022-11-20 12:02:09,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658807742] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:02:09,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:02:09,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-20 12:02:09,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471921531] [2022-11-20 12:02:09,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:02:09,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 12:02:09,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:02:09,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 12:02:09,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-20 12:02:09,366 INFO L87 Difference]: Start difference. First operand 418 states and 618 transitions. Second operand has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 6 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-20 12:02:11,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:02:11,177 INFO L93 Difference]: Finished difference Result 434 states and 642 transitions. [2022-11-20 12:02:11,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 12:02:11,177 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 6 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 92 [2022-11-20 12:02:11,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:02:11,180 INFO L225 Difference]: With dead ends: 434 [2022-11-20 12:02:11,181 INFO L226 Difference]: Without dead ends: 432 [2022-11-20 12:02:11,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-11-20 12:02:11,182 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 228 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 1167 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 1275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-20 12:02:11,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 675 Invalid, 1275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1167 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-20 12:02:11,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2022-11-20 12:02:11,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 422. [2022-11-20 12:02:11,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 286 states have (on average 1.2377622377622377) internal successors, (354), 292 states have internal predecessors, (354), 112 states have call successors, (112), 19 states have call predecessors, (112), 23 states have return successors, (155), 110 states have call predecessors, (155), 111 states have call successors, (155) [2022-11-20 12:02:11,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 621 transitions. [2022-11-20 12:02:11,259 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 621 transitions. Word has length 92 [2022-11-20 12:02:11,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:02:11,259 INFO L495 AbstractCegarLoop]: Abstraction has 422 states and 621 transitions. [2022-11-20 12:02:11,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 6 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-20 12:02:11,259 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 621 transitions. [2022-11-20 12:02:11,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-20 12:02:11,262 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:02:11,262 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 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] [2022-11-20 12:02:11,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 12:02:11,262 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:02:11,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:02:11,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1001306424, now seen corresponding path program 1 times [2022-11-20 12:02:11,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:02:11,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249961289] [2022-11-20 12:02:11,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:02:11,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:02:11,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:11,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:02:11,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:11,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:02:11,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:11,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 12:02:11,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:11,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 12:02:11,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:11,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-20 12:02:11,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:11,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-20 12:02:11,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:11,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 12:02:11,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:11,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-20 12:02:11,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:11,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-20 12:02:11,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:11,999 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-20 12:02:11,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:02:11,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249961289] [2022-11-20 12:02:11,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249961289] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:02:11,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:02:12,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 12:02:12,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954584323] [2022-11-20 12:02:12,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:02:12,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 12:02:12,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:02:12,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 12:02:12,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-20 12:02:12,001 INFO L87 Difference]: Start difference. First operand 422 states and 621 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 5 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-20 12:02:13,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:02:13,165 INFO L93 Difference]: Finished difference Result 504 states and 727 transitions. [2022-11-20 12:02:13,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 12:02:13,166 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 5 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 91 [2022-11-20 12:02:13,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:02:13,169 INFO L225 Difference]: With dead ends: 504 [2022-11-20 12:02:13,170 INFO L226 Difference]: Without dead ends: 426 [2022-11-20 12:02:13,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-20 12:02:13,173 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 180 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:02:13,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 423 Invalid, 891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 12:02:13,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2022-11-20 12:02:13,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 422. [2022-11-20 12:02:13,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 286 states have (on average 1.2237762237762237) internal successors, (350), 292 states have internal predecessors, (350), 112 states have call successors, (112), 19 states have call predecessors, (112), 23 states have return successors, (155), 110 states have call predecessors, (155), 111 states have call successors, (155) [2022-11-20 12:02:13,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 617 transitions. [2022-11-20 12:02:13,292 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 617 transitions. Word has length 91 [2022-11-20 12:02:13,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:02:13,293 INFO L495 AbstractCegarLoop]: Abstraction has 422 states and 617 transitions. [2022-11-20 12:02:13,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 5 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-20 12:02:13,293 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 617 transitions. [2022-11-20 12:02:13,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-20 12:02:13,297 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:02:13,297 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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] [2022-11-20 12:02:13,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-20 12:02:13,298 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:02:13,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:02:13,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1584782076, now seen corresponding path program 1 times [2022-11-20 12:02:13,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:02:13,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715448081] [2022-11-20 12:02:13,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:02:13,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:02:14,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:18,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:02:18,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:18,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:02:18,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:18,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 12:02:18,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:18,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 12:02:18,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:18,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-20 12:02:18,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:18,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-20 12:02:18,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:18,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-20 12:02:18,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:18,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-20 12:02:18,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:18,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-20 12:02:18,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:18,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-11-20 12:02:18,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:18,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-11-20 12:02:18,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:18,948 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-20 12:02:18,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:02:18,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715448081] [2022-11-20 12:02:18,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715448081] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:02:18,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:02:18,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-20 12:02:18,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103209885] [2022-11-20 12:02:18,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:02:18,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 12:02:18,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:02:18,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 12:02:18,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-20 12:02:18,951 INFO L87 Difference]: Start difference. First operand 422 states and 617 transitions. Second operand has 12 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 8 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-20 12:02:21,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:02:21,209 INFO L93 Difference]: Finished difference Result 466 states and 691 transitions. [2022-11-20 12:02:21,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 12:02:21,210 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 8 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) Word has length 93 [2022-11-20 12:02:21,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:02:21,213 INFO L225 Difference]: With dead ends: 466 [2022-11-20 12:02:21,213 INFO L226 Difference]: Without dead ends: 464 [2022-11-20 12:02:21,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-11-20 12:02:21,214 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 222 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 1541 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 1653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:02:21,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 696 Invalid, 1653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1541 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-20 12:02:21,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2022-11-20 12:02:21,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 428. [2022-11-20 12:02:21,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 290 states have (on average 1.2206896551724138) internal successors, (354), 296 states have internal predecessors, (354), 113 states have call successors, (113), 20 states have call predecessors, (113), 24 states have return successors, (156), 111 states have call predecessors, (156), 112 states have call successors, (156) [2022-11-20 12:02:21,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 623 transitions. [2022-11-20 12:02:21,297 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 623 transitions. Word has length 93 [2022-11-20 12:02:21,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:02:21,297 INFO L495 AbstractCegarLoop]: Abstraction has 428 states and 623 transitions. [2022-11-20 12:02:21,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 8 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-20 12:02:21,297 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 623 transitions. [2022-11-20 12:02:21,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-20 12:02:21,299 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:02:21,300 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:02:21,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-20 12:02:21,300 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:02:21,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:02:21,300 INFO L85 PathProgramCache]: Analyzing trace with hash -2097438362, now seen corresponding path program 1 times [2022-11-20 12:02:21,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:02:21,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549761753] [2022-11-20 12:02:21,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:02:21,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:02:21,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:25,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:02:25,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:25,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:02:25,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:25,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 12:02:25,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:26,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 12:02:26,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:26,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-20 12:02:26,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:26,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-20 12:02:26,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:26,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-20 12:02:26,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:26,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-20 12:02:26,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:26,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-20 12:02:26,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:26,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-11-20 12:02:26,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:26,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-11-20 12:02:26,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:26,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-11-20 12:02:26,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:26,151 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-20 12:02:26,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:02:26,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549761753] [2022-11-20 12:02:26,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549761753] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:02:26,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:02:26,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-20 12:02:26,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820083780] [2022-11-20 12:02:26,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:02:26,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 12:02:26,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:02:26,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 12:02:26,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-11-20 12:02:26,154 INFO L87 Difference]: Start difference. First operand 428 states and 623 transitions. Second operand has 16 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 9 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-20 12:02:29,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:02:29,955 INFO L93 Difference]: Finished difference Result 704 states and 1093 transitions. [2022-11-20 12:02:29,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 12:02:29,956 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 9 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) Word has length 99 [2022-11-20 12:02:29,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:02:29,961 INFO L225 Difference]: With dead ends: 704 [2022-11-20 12:02:29,961 INFO L226 Difference]: Without dead ends: 702 [2022-11-20 12:02:29,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2022-11-20 12:02:29,963 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 350 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 2394 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 866 SdHoareTripleChecker+Invalid, 2631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 2394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-20 12:02:29,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 866 Invalid, 2631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 2394 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-20 12:02:29,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2022-11-20 12:02:30,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 434. [2022-11-20 12:02:30,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 294 states have (on average 1.217687074829932) internal successors, (358), 300 states have internal predecessors, (358), 114 states have call successors, (114), 21 states have call predecessors, (114), 25 states have return successors, (157), 112 states have call predecessors, (157), 113 states have call successors, (157) [2022-11-20 12:02:30,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 629 transitions. [2022-11-20 12:02:30,072 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 629 transitions. Word has length 99 [2022-11-20 12:02:30,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:02:30,072 INFO L495 AbstractCegarLoop]: Abstraction has 434 states and 629 transitions. [2022-11-20 12:02:30,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 9 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-20 12:02:30,073 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 629 transitions. [2022-11-20 12:02:30,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-20 12:02:30,075 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:02:30,075 INFO L195 NwaCegarLoop]: trace histogram [5, 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] [2022-11-20 12:02:30,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-20 12:02:30,076 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:02:30,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:02:30,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1612799073, now seen corresponding path program 1 times [2022-11-20 12:02:30,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:02:30,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103331448] [2022-11-20 12:02:30,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:02:30,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:02:30,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:31,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:02:31,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:31,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:02:31,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:31,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 12:02:31,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:31,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 12:02:31,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:31,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-20 12:02:31,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:32,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-20 12:02:32,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:32,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 12:02:32,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:32,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-20 12:02:32,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:32,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-11-20 12:02:32,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:32,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-20 12:02:32,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:32,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-11-20 12:02:32,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:32,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-11-20 12:02:32,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:32,133 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-20 12:02:32,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:02:32,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103331448] [2022-11-20 12:02:32,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103331448] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:02:32,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:02:32,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-20 12:02:32,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936175047] [2022-11-20 12:02:32,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:02:32,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 12:02:32,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:02:32,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 12:02:32,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-11-20 12:02:32,136 INFO L87 Difference]: Start difference. First operand 434 states and 629 transitions. Second operand has 13 states, 12 states have (on average 4.666666666666667) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-20 12:02:34,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:02:34,048 INFO L93 Difference]: Finished difference Result 488 states and 694 transitions. [2022-11-20 12:02:34,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 12:02:34,048 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.666666666666667) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) Word has length 102 [2022-11-20 12:02:34,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:02:34,051 INFO L225 Difference]: With dead ends: 488 [2022-11-20 12:02:34,052 INFO L226 Difference]: Without dead ends: 442 [2022-11-20 12:02:34,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2022-11-20 12:02:34,053 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 243 mSDsluCounter, 719 mSDsCounter, 0 mSdLazyCounter, 1392 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 899 SdHoareTripleChecker+Invalid, 1471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-20 12:02:34,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 899 Invalid, 1471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1392 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-20 12:02:34,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-11-20 12:02:34,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 432. [2022-11-20 12:02:34,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 293 states have (on average 1.2150170648464165) internal successors, (356), 299 states have internal predecessors, (356), 113 states have call successors, (113), 21 states have call predecessors, (113), 25 states have return successors, (156), 111 states have call predecessors, (156), 112 states have call successors, (156) [2022-11-20 12:02:34,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 625 transitions. [2022-11-20 12:02:34,149 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 625 transitions. Word has length 102 [2022-11-20 12:02:34,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:02:34,149 INFO L495 AbstractCegarLoop]: Abstraction has 432 states and 625 transitions. [2022-11-20 12:02:34,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.666666666666667) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-20 12:02:34,150 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 625 transitions. [2022-11-20 12:02:34,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-20 12:02:34,152 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:02:34,152 INFO L195 NwaCegarLoop]: trace histogram [5, 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] [2022-11-20 12:02:34,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-20 12:02:34,153 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:02:34,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:02:34,153 INFO L85 PathProgramCache]: Analyzing trace with hash -73380765, now seen corresponding path program 1 times [2022-11-20 12:02:34,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:02:34,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166761491] [2022-11-20 12:02:34,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:02:34,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:02:34,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:36,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:02:36,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:36,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:02:36,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:36,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 12:02:36,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:36,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 12:02:36,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:36,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-20 12:02:36,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:36,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-20 12:02:36,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:36,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 12:02:36,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:36,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-20 12:02:36,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:36,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-11-20 12:02:36,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:36,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-20 12:02:36,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:36,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-11-20 12:02:36,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:36,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-11-20 12:02:36,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:36,642 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-20 12:02:36,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:02:36,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166761491] [2022-11-20 12:02:36,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166761491] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:02:36,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:02:36,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-11-20 12:02:36,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861229006] [2022-11-20 12:02:36,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:02:36,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 12:02:36,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:02:36,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 12:02:36,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2022-11-20 12:02:36,645 INFO L87 Difference]: Start difference. First operand 432 states and 625 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 14 states have internal predecessors, (56), 7 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-20 12:02:41,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:02:41,309 INFO L93 Difference]: Finished difference Result 638 states and 912 transitions. [2022-11-20 12:02:41,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 12:02:41,310 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 14 states have internal predecessors, (56), 7 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 102 [2022-11-20 12:02:41,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:02:41,313 INFO L225 Difference]: With dead ends: 638 [2022-11-20 12:02:41,313 INFO L226 Difference]: Without dead ends: 572 [2022-11-20 12:02:41,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2022-11-20 12:02:41,315 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 556 mSDsluCounter, 1541 mSDsCounter, 0 mSdLazyCounter, 3785 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 1758 SdHoareTripleChecker+Invalid, 4115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 3785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:02:41,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [588 Valid, 1758 Invalid, 4115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 3785 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-11-20 12:02:41,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2022-11-20 12:02:41,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 484. [2022-11-20 12:02:41,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 334 states have (on average 1.2095808383233533) internal successors, (404), 341 states have internal predecessors, (404), 122 states have call successors, (122), 23 states have call predecessors, (122), 27 states have return successors, (156), 119 states have call predecessors, (156), 121 states have call successors, (156) [2022-11-20 12:02:41,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 682 transitions. [2022-11-20 12:02:41,436 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 682 transitions. Word has length 102 [2022-11-20 12:02:41,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:02:41,440 INFO L495 AbstractCegarLoop]: Abstraction has 484 states and 682 transitions. [2022-11-20 12:02:41,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 14 states have internal predecessors, (56), 7 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-20 12:02:41,440 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 682 transitions. [2022-11-20 12:02:41,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-20 12:02:41,443 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:02:41,443 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 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] [2022-11-20 12:02:41,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-20 12:02:41,443 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:02:41,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:02:41,444 INFO L85 PathProgramCache]: Analyzing trace with hash 238731035, now seen corresponding path program 1 times [2022-11-20 12:02:41,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:02:41,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829905017] [2022-11-20 12:02:41,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:02:41,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:02:41,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:41,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:02:41,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:42,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-20 12:02:42,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:42,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 12:02:42,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:42,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 12:02:42,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:42,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-20 12:02:42,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:42,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 12:02:42,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:42,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 12:02:42,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:42,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-20 12:02:42,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:42,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-11-20 12:02:42,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:42,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 12:02:42,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:42,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-20 12:02:42,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:42,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-20 12:02:42,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:42,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-20 12:02:42,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:42,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-11-20 12:02:42,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:42,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-11-20 12:02:42,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:42,615 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-20 12:02:42,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:02:42,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829905017] [2022-11-20 12:02:42,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829905017] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:02:42,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248956176] [2022-11-20 12:02:42,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:02:42,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:02:42,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:02:42,618 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:02:42,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 12:02:43,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:43,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 2762 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 12:02:43,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:02:43,402 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-20 12:02:43,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:02:43,575 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-20 12:02:43,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248956176] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:02:43,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:02:43,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12, 12] total 23 [2022-11-20 12:02:43,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816705073] [2022-11-20 12:02:43,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:02:43,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 12:02:43,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:02:43,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 12:02:43,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2022-11-20 12:02:43,580 INFO L87 Difference]: Start difference. First operand 484 states and 682 transitions. Second operand has 23 states, 21 states have (on average 4.190476190476191) internal successors, (88), 17 states have internal predecessors, (88), 9 states have call successors, (24), 4 states have call predecessors, (24), 7 states have return successors, (22), 11 states have call predecessors, (22), 9 states have call successors, (22) [2022-11-20 12:02:46,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:02:46,317 INFO L93 Difference]: Finished difference Result 739 states and 995 transitions. [2022-11-20 12:02:46,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 12:02:46,318 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 4.190476190476191) internal successors, (88), 17 states have internal predecessors, (88), 9 states have call successors, (24), 4 states have call predecessors, (24), 7 states have return successors, (22), 11 states have call predecessors, (22), 9 states have call successors, (22) Word has length 115 [2022-11-20 12:02:46,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:02:46,319 INFO L225 Difference]: With dead ends: 739 [2022-11-20 12:02:46,320 INFO L226 Difference]: Without dead ends: 329 [2022-11-20 12:02:46,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2022-11-20 12:02:46,322 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 192 mSDsluCounter, 1187 mSDsCounter, 0 mSdLazyCounter, 2284 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 1276 SdHoareTripleChecker+Invalid, 2385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 2284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:02:46,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 1276 Invalid, 2385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 2284 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-20 12:02:46,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-11-20 12:02:46,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 322. [2022-11-20 12:02:46,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 233 states have (on average 1.1716738197424892) internal successors, (273), 241 states have internal predecessors, (273), 63 states have call successors, (63), 21 states have call predecessors, (63), 25 states have return successors, (87), 59 states have call predecessors, (87), 62 states have call successors, (87) [2022-11-20 12:02:46,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 423 transitions. [2022-11-20 12:02:46,384 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 423 transitions. Word has length 115 [2022-11-20 12:02:46,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:02:46,384 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 423 transitions. [2022-11-20 12:02:46,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 4.190476190476191) internal successors, (88), 17 states have internal predecessors, (88), 9 states have call successors, (24), 4 states have call predecessors, (24), 7 states have return successors, (22), 11 states have call predecessors, (22), 9 states have call successors, (22) [2022-11-20 12:02:46,385 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 423 transitions. [2022-11-20 12:02:46,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-20 12:02:46,386 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:02:46,387 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:02:46,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 12:02:46,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:02:46,596 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:02:46,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:02:46,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1945763741, now seen corresponding path program 1 times [2022-11-20 12:02:46,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:02:46,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114256449] [2022-11-20 12:02:46,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:02:46,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:02:48,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:55,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:02:55,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:55,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:02:55,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:55,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 12:02:55,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:55,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 12:02:55,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:56,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-20 12:02:56,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:56,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-20 12:02:56,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:56,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-20 12:02:56,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:56,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-20 12:02:56,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:56,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-20 12:02:56,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:56,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-11-20 12:02:56,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:56,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-11-20 12:02:56,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:56,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-11-20 12:02:56,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:56,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-11-20 12:02:56,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:56,757 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-20 12:02:56,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:02:56,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114256449] [2022-11-20 12:02:56,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114256449] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:02:56,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262513555] [2022-11-20 12:02:56,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:02:56,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:02:56,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:02:56,762 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:02:56,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 12:02:57,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:57,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 2749 conjuncts, 185 conjunts are in the unsatisfiable core [2022-11-20 12:02:57,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:02:57,871 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 [2022-11-20 12:02:58,459 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 12:02:58,459 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 [2022-11-20 12:02:58,628 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 [2022-11-20 12:02:58,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:02:58,651 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 [2022-11-20 12:02:58,659 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 [2022-11-20 12:03:02,207 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 12:03:02,208 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 15 treesize of output 15 [2022-11-20 12:03:02,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:03:02,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-11-20 12:03:02,549 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 [2022-11-20 12:03:02,579 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 51 treesize of output 47 [2022-11-20 12:03:03,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:03:03,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 89 [2022-11-20 12:03:03,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:03:03,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:03:03,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:03:03,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:03:03,921 INFO L321 Elim1Store]: treesize reduction 92, result has 1.1 percent of original size [2022-11-20 12:03:03,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 7 case distinctions, treesize of input 134 treesize of output 126 [2022-11-20 12:03:03,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:03:03,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 125 [2022-11-20 12:03:14,012 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 42 treesize of output 30 [2022-11-20 12:03:14,022 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 66 treesize of output 46 [2022-11-20 12:03:15,286 INFO L321 Elim1Store]: treesize reduction 104, result has 43.8 percent of original size [2022-11-20 12:03:15,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 28 case distinctions, treesize of input 176 treesize of output 180 [2022-11-20 12:03:15,633 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-20 12:03:15,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:03:26,804 WARN L233 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 63 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:03:35,488 WARN L233 SmtUtils]: Spent 8.07s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:03:38,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262513555] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:03:38,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:03:38,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 40] total 62 [2022-11-20 12:03:38,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138292237] [2022-11-20 12:03:38,537 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:03:38,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-20 12:03:38,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:03:38,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-20 12:03:38,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=5398, Unknown=4, NotChecked=0, Total=5700 [2022-11-20 12:03:38,541 INFO L87 Difference]: Start difference. First operand 322 states and 423 transitions. Second operand has 62 states, 54 states have (on average 2.2777777777777777) internal successors, (123), 47 states have internal predecessors, (123), 18 states have call successors, (27), 11 states have call predecessors, (27), 12 states have return successors, (25), 14 states have call predecessors, (25), 15 states have call successors, (25) [2022-11-20 12:03:55,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:03:55,827 INFO L93 Difference]: Finished difference Result 561 states and 757 transitions. [2022-11-20 12:03:55,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-20 12:03:55,828 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 54 states have (on average 2.2777777777777777) internal successors, (123), 47 states have internal predecessors, (123), 18 states have call successors, (27), 11 states have call predecessors, (27), 12 states have return successors, (25), 14 states have call predecessors, (25), 15 states have call successors, (25) Word has length 109 [2022-11-20 12:03:55,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:03:55,832 INFO L225 Difference]: With dead ends: 561 [2022-11-20 12:03:55,832 INFO L226 Difference]: Without dead ends: 556 [2022-11-20 12:03:55,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 140 SyntacticMatches, 16 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4146 ImplicationChecksByTransitivity, 42.0s TimeCoverageRelationStatistics Valid=746, Invalid=13292, Unknown=4, NotChecked=0, Total=14042 [2022-11-20 12:03:55,836 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 380 mSDsluCounter, 2447 mSDsCounter, 0 mSdLazyCounter, 5392 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 2594 SdHoareTripleChecker+Invalid, 7786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 5392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2227 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:03:55,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 2594 Invalid, 7786 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [167 Valid, 5392 Invalid, 0 Unknown, 2227 Unchecked, 8.3s Time] [2022-11-20 12:03:55,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2022-11-20 12:03:55,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 445. [2022-11-20 12:03:55,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 321 states have (on average 1.1713395638629283) internal successors, (376), 332 states have internal predecessors, (376), 86 states have call successors, (86), 33 states have call predecessors, (86), 37 states have return successors, (114), 79 states have call predecessors, (114), 85 states have call successors, (114) [2022-11-20 12:03:55,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 576 transitions. [2022-11-20 12:03:55,940 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 576 transitions. Word has length 109 [2022-11-20 12:03:55,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:03:55,941 INFO L495 AbstractCegarLoop]: Abstraction has 445 states and 576 transitions. [2022-11-20 12:03:55,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 54 states have (on average 2.2777777777777777) internal successors, (123), 47 states have internal predecessors, (123), 18 states have call successors, (27), 11 states have call predecessors, (27), 12 states have return successors, (25), 14 states have call predecessors, (25), 15 states have call successors, (25) [2022-11-20 12:03:55,941 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 576 transitions. [2022-11-20 12:03:55,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-20 12:03:55,943 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:03:55,944 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:03:55,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 12:03:56,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:03:56,158 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:03:56,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:03:56,159 INFO L85 PathProgramCache]: Analyzing trace with hash -274530758, now seen corresponding path program 1 times [2022-11-20 12:03:56,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:03:56,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363133937] [2022-11-20 12:03:56,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:03:56,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:03:57,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:04:02,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:04:02,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:04:02,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:04:02,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:04:02,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-20 12:04:02,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:04:02,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 12:04:02,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:04:02,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 12:04:02,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:04:02,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-20 12:04:02,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:04:02,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-20 12:04:02,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:04:02,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-20 12:04:02,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:04:03,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-20 12:04:03,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:04:03,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-11-20 12:04:03,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:04:03,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-11-20 12:04:03,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:04:03,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-11-20 12:04:03,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:04:03,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-11-20 12:04:03,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:04:03,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-11-20 12:04:03,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:04:03,226 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-20 12:04:03,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:04:03,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363133937] [2022-11-20 12:04:03,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363133937] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:04:03,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168218160] [2022-11-20 12:04:03,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:04:03,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:04:03,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:04:03,228 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:04:03,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 12:04:04,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:04:04,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 2762 conjuncts, 182 conjunts are in the unsatisfiable core [2022-11-20 12:04:04,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:04:04,171 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 [2022-11-20 12:04:04,500 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 [2022-11-20 12:04:04,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:04:04,818 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 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 12:04:04,926 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 [2022-11-20 12:04:04,942 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 [2022-11-20 12:04:04,954 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 24 [2022-11-20 12:04:07,361 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 12:04:07,361 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 15 treesize of output 15 [2022-11-20 12:04:07,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-11-20 12:04:07,718 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 [2022-11-20 12:04:07,739 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 38 treesize of output 36 [2022-11-20 12:04:08,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:04:08,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2022-11-20 12:04:08,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:04:08,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:04:08,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:04:08,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:04:08,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:04:08,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:04:08,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:04:08,975 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-20 12:04:08,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 134 treesize of output 126 [2022-11-20 12:04:08,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:04:08,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 114 [2022-11-20 12:04:32,787 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 50 treesize of output 32 [2022-11-20 12:04:32,802 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 55 treesize of output 31 [2022-11-20 12:04:34,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:04:34,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:04:34,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:04:34,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:04:34,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:04:34,046 INFO L321 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-11-20 12:04:34,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 5 case distinctions, treesize of input 118 treesize of output 62 [2022-11-20 12:04:34,397 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-20 12:04:34,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:04:47,962 WARN L233 SmtUtils]: Spent 8.09s on a formula simplification that was a NOOP. DAG size: 63 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:04:56,760 WARN L233 SmtUtils]: Spent 8.09s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:05:01,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168218160] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:05:01,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:05:01,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 40] total 54 [2022-11-20 12:05:01,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86683855] [2022-11-20 12:05:01,567 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:05:01,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-20 12:05:01,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:05:01,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-20 12:05:01,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=4283, Unknown=6, NotChecked=0, Total=4556 [2022-11-20 12:05:01,570 INFO L87 Difference]: Start difference. First operand 445 states and 576 transitions. Second operand has 54 states, 46 states have (on average 2.8043478260869565) internal successors, (129), 43 states have internal predecessors, (129), 18 states have call successors, (30), 11 states have call predecessors, (30), 11 states have return successors, (27), 14 states have call predecessors, (27), 15 states have call successors, (27) [2022-11-20 12:05:28,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:05:28,040 INFO L93 Difference]: Finished difference Result 588 states and 757 transitions. [2022-11-20 12:05:28,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-20 12:05:28,043 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 46 states have (on average 2.8043478260869565) internal successors, (129), 43 states have internal predecessors, (129), 18 states have call successors, (30), 11 states have call predecessors, (30), 11 states have return successors, (27), 14 states have call predecessors, (27), 15 states have call successors, (27) Word has length 114 [2022-11-20 12:05:28,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:05:28,046 INFO L225 Difference]: With dead ends: 588 [2022-11-20 12:05:28,046 INFO L226 Difference]: Without dead ends: 584 [2022-11-20 12:05:28,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 138 SyntacticMatches, 17 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2800 ImplicationChecksByTransitivity, 66.0s TimeCoverageRelationStatistics Valid=561, Invalid=8359, Unknown=10, NotChecked=0, Total=8930 [2022-11-20 12:05:28,051 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 345 mSDsluCounter, 2202 mSDsCounter, 0 mSdLazyCounter, 3002 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 2346 SdHoareTripleChecker+Invalid, 4524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 3002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1369 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2022-11-20 12:05:28,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 2346 Invalid, 4524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 3002 Invalid, 0 Unknown, 1369 Unchecked, 9.9s Time] [2022-11-20 12:05:28,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2022-11-20 12:05:28,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 488. [2022-11-20 12:05:28,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 356 states have (on average 1.1657303370786516) internal successors, (415), 369 states have internal predecessors, (415), 88 states have call successors, (88), 38 states have call predecessors, (88), 43 states have return successors, (116), 80 states have call predecessors, (116), 87 states have call successors, (116) [2022-11-20 12:05:28,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 619 transitions. [2022-11-20 12:05:28,179 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 619 transitions. Word has length 114 [2022-11-20 12:05:28,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:05:28,179 INFO L495 AbstractCegarLoop]: Abstraction has 488 states and 619 transitions. [2022-11-20 12:05:28,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 46 states have (on average 2.8043478260869565) internal successors, (129), 43 states have internal predecessors, (129), 18 states have call successors, (30), 11 states have call predecessors, (30), 11 states have return successors, (27), 14 states have call predecessors, (27), 15 states have call successors, (27) [2022-11-20 12:05:28,180 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 619 transitions. [2022-11-20 12:05:28,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-20 12:05:28,181 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:05:28,182 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 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, 1, 1] [2022-11-20 12:05:28,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 12:05:28,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-20 12:05:28,386 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:05:28,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:05:28,387 INFO L85 PathProgramCache]: Analyzing trace with hash 701749649, now seen corresponding path program 1 times [2022-11-20 12:05:28,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:05:28,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913765225] [2022-11-20 12:05:28,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:05:28,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:05:28,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:28,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:05:28,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:28,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:05:28,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:28,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-20 12:05:28,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:28,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 12:05:28,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:28,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 12:05:28,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:28,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-20 12:05:28,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:28,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-20 12:05:28,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:28,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-20 12:05:28,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:28,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-20 12:05:28,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:28,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-11-20 12:05:28,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:28,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-11-20 12:05:28,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:28,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-11-20 12:05:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:28,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-11-20 12:05:28,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:28,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-11-20 12:05:28,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:28,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-11-20 12:05:28,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:28,972 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-11-20 12:05:28,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:05:28,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913765225] [2022-11-20 12:05:28,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913765225] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:05:28,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:05:28,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 12:05:28,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045598803] [2022-11-20 12:05:28,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:05:28,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:05:28,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:05:28,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:05:28,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:05:28,974 INFO L87 Difference]: Start difference. First operand 488 states and 619 transitions. Second operand has 7 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-20 12:05:30,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:05:30,611 INFO L93 Difference]: Finished difference Result 885 states and 1151 transitions. [2022-11-20 12:05:30,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 12:05:30,614 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) Word has length 121 [2022-11-20 12:05:30,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:05:30,618 INFO L225 Difference]: With dead ends: 885 [2022-11-20 12:05:30,618 INFO L226 Difference]: Without dead ends: 574 [2022-11-20 12:05:30,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-20 12:05:30,620 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 123 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-20 12:05:30,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 369 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-20 12:05:30,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2022-11-20 12:05:30,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 488. [2022-11-20 12:05:30,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 356 states have (on average 1.1657303370786516) internal successors, (415), 369 states have internal predecessors, (415), 88 states have call successors, (88), 38 states have call predecessors, (88), 43 states have return successors, (112), 80 states have call predecessors, (112), 87 states have call successors, (112) [2022-11-20 12:05:30,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 615 transitions. [2022-11-20 12:05:30,755 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 615 transitions. Word has length 121 [2022-11-20 12:05:30,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:05:30,756 INFO L495 AbstractCegarLoop]: Abstraction has 488 states and 615 transitions. [2022-11-20 12:05:30,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-20 12:05:30,756 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 615 transitions. [2022-11-20 12:05:30,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-20 12:05:30,758 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:05:30,758 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:05:30,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-20 12:05:30,759 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:05:30,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:05:30,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1196990312, now seen corresponding path program 1 times [2022-11-20 12:05:30,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:05:30,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669743836] [2022-11-20 12:05:30,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:05:30,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:05:30,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:31,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:05:31,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:31,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:05:31,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:31,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-20 12:05:31,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:31,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 12:05:31,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:31,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 12:05:31,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:31,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-20 12:05:31,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:31,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-20 12:05:31,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:31,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-11-20 12:05:31,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:31,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-20 12:05:31,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:31,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-11-20 12:05:31,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:31,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 12:05:31,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:31,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 12:05:31,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:31,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-11-20 12:05:31,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:31,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-11-20 12:05:31,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:31,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-11-20 12:05:31,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:31,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-11-20 12:05:31,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:31,239 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-11-20 12:05:31,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:05:31,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669743836] [2022-11-20 12:05:31,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669743836] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:05:31,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:05:31,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 12:05:31,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987152170] [2022-11-20 12:05:31,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:05:31,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 12:05:31,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:05:31,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 12:05:31,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:05:31,242 INFO L87 Difference]: Start difference. First operand 488 states and 615 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 4 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-20 12:05:32,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:05:32,029 INFO L93 Difference]: Finished difference Result 564 states and 698 transitions. [2022-11-20 12:05:32,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:05:32,030 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 4 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 123 [2022-11-20 12:05:32,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:05:32,032 INFO L225 Difference]: With dead ends: 564 [2022-11-20 12:05:32,032 INFO L226 Difference]: Without dead ends: 425 [2022-11-20 12:05:32,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:05:32,033 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 91 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 12:05:32,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 207 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 12:05:32,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-11-20 12:05:32,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 425. [2022-11-20 12:05:32,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 320 states have (on average 1.15) internal successors, (368), 330 states have internal predecessors, (368), 65 states have call successors, (65), 35 states have call predecessors, (65), 39 states have return successors, (80), 59 states have call predecessors, (80), 64 states have call successors, (80) [2022-11-20 12:05:32,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 513 transitions. [2022-11-20 12:05:32,131 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 513 transitions. Word has length 123 [2022-11-20 12:05:32,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:05:32,131 INFO L495 AbstractCegarLoop]: Abstraction has 425 states and 513 transitions. [2022-11-20 12:05:32,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 4 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-20 12:05:32,131 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 513 transitions. [2022-11-20 12:05:32,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-20 12:05:32,133 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:05:32,133 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 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, 1, 1, 1, 1] [2022-11-20 12:05:32,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-20 12:05:32,133 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:05:32,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:05:32,134 INFO L85 PathProgramCache]: Analyzing trace with hash -666242315, now seen corresponding path program 1 times [2022-11-20 12:05:32,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:05:32,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827133712] [2022-11-20 12:05:32,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:05:32,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:05:32,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:35,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:05:35,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:35,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:05:35,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:35,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-20 12:05:35,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:35,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 12:05:35,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:35,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 12:05:35,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:35,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-20 12:05:35,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:35,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-20 12:05:35,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:35,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-11-20 12:05:35,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:35,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-20 12:05:35,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:35,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-20 12:05:35,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:35,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-11-20 12:05:35,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:35,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-20 12:05:35,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:35,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-11-20 12:05:35,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:35,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-11-20 12:05:35,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:36,050 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-20 12:05:36,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:05:36,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827133712] [2022-11-20 12:05:36,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827133712] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:05:36,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998219744] [2022-11-20 12:05:36,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:05:36,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:05:36,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:05:36,053 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:05:36,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 12:05:36,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:36,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 2724 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-20 12:05:36,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:05:36,886 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 [2022-11-20 12:05:39,357 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 23 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-20 12:05:39,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:05:40,872 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-20 12:05:40,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998219744] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:05:40,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:05:40,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 9] total 31 [2022-11-20 12:05:40,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102250431] [2022-11-20 12:05:40,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:05:40,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-20 12:05:40,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:05:40,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-20 12:05:40,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2022-11-20 12:05:40,875 INFO L87 Difference]: Start difference. First operand 425 states and 513 transitions. Second operand has 31 states, 29 states have (on average 5.517241379310345) internal successors, (160), 30 states have internal predecessors, (160), 11 states have call successors, (38), 4 states have call predecessors, (38), 6 states have return successors, (37), 8 states have call predecessors, (37), 10 states have call successors, (37) [2022-11-20 12:05:46,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:05:46,328 INFO L93 Difference]: Finished difference Result 482 states and 571 transitions. [2022-11-20 12:05:46,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 12:05:46,329 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 5.517241379310345) internal successors, (160), 30 states have internal predecessors, (160), 11 states have call successors, (38), 4 states have call predecessors, (38), 6 states have return successors, (37), 8 states have call predecessors, (37), 10 states have call successors, (37) Word has length 121 [2022-11-20 12:05:46,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:05:46,332 INFO L225 Difference]: With dead ends: 482 [2022-11-20 12:05:46,332 INFO L226 Difference]: Without dead ends: 431 [2022-11-20 12:05:46,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 239 SyntacticMatches, 17 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=269, Invalid=1623, Unknown=0, NotChecked=0, Total=1892 [2022-11-20 12:05:46,334 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 299 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 1343 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 1569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-20 12:05:46,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 657 Invalid, 1569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1343 Invalid, 0 Unknown, 183 Unchecked, 3.8s Time] [2022-11-20 12:05:46,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-11-20 12:05:46,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 423. [2022-11-20 12:05:46,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 316 states have (on average 1.139240506329114) internal successors, (360), 326 states have internal predecessors, (360), 65 states have call successors, (65), 37 states have call predecessors, (65), 41 states have return successors, (80), 59 states have call predecessors, (80), 64 states have call successors, (80) [2022-11-20 12:05:46,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 505 transitions. [2022-11-20 12:05:46,452 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 505 transitions. Word has length 121 [2022-11-20 12:05:46,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:05:46,452 INFO L495 AbstractCegarLoop]: Abstraction has 423 states and 505 transitions. [2022-11-20 12:05:46,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 5.517241379310345) internal successors, (160), 30 states have internal predecessors, (160), 11 states have call successors, (38), 4 states have call predecessors, (38), 6 states have return successors, (37), 8 states have call predecessors, (37), 10 states have call successors, (37) [2022-11-20 12:05:46,453 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 505 transitions. [2022-11-20 12:05:46,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-20 12:05:46,454 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:05:46,455 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 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] [2022-11-20 12:05:46,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 12:05:46,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-20 12:05:46,662 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:05:46,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:05:46,662 INFO L85 PathProgramCache]: Analyzing trace with hash 502347963, now seen corresponding path program 1 times [2022-11-20 12:05:46,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:05:46,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399983487] [2022-11-20 12:05:46,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:05:46,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:05:46,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:47,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:05:47,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:47,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:05:48,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:48,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-20 12:05:48,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:48,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 12:05:48,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:48,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 12:05:48,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:48,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-20 12:05:48,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:48,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-20 12:05:48,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:48,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-11-20 12:05:48,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:48,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-20 12:05:48,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:48,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-20 12:05:48,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:48,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-11-20 12:05:48,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:48,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-20 12:05:48,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:48,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-11-20 12:05:48,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:48,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-11-20 12:05:48,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:48,594 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-20 12:05:48,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:05:48,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399983487] [2022-11-20 12:05:48,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399983487] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:05:48,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:05:48,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-20 12:05:48,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864615965] [2022-11-20 12:05:48,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:05:48,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 12:05:48,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:05:48,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 12:05:48,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-11-20 12:05:48,597 INFO L87 Difference]: Start difference. First operand 423 states and 505 transitions. Second operand has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 11 states have internal predecessors, (72), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-20 12:05:51,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:05:51,274 INFO L93 Difference]: Finished difference Result 446 states and 531 transitions. [2022-11-20 12:05:51,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 12:05:51,275 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 11 states have internal predecessors, (72), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) Word has length 121 [2022-11-20 12:05:51,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:05:51,277 INFO L225 Difference]: With dead ends: 446 [2022-11-20 12:05:51,277 INFO L226 Difference]: Without dead ends: 429 [2022-11-20 12:05:51,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-11-20 12:05:51,278 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 185 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 928 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:05:51,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 360 Invalid, 997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 928 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-20 12:05:51,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-11-20 12:05:51,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 423. [2022-11-20 12:05:51,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 316 states have (on average 1.1329113924050633) internal successors, (358), 326 states have internal predecessors, (358), 65 states have call successors, (65), 37 states have call predecessors, (65), 41 states have return successors, (80), 59 states have call predecessors, (80), 64 states have call successors, (80) [2022-11-20 12:05:51,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 503 transitions. [2022-11-20 12:05:51,414 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 503 transitions. Word has length 121 [2022-11-20 12:05:51,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:05:51,414 INFO L495 AbstractCegarLoop]: Abstraction has 423 states and 503 transitions. [2022-11-20 12:05:51,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 11 states have internal predecessors, (72), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-20 12:05:51,415 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 503 transitions. [2022-11-20 12:05:51,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-20 12:05:51,417 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:05:51,417 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 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] [2022-11-20 12:05:51,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-20 12:05:51,417 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:05:51,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:05:51,418 INFO L85 PathProgramCache]: Analyzing trace with hash 760513401, now seen corresponding path program 1 times [2022-11-20 12:05:51,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:05:51,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907225788] [2022-11-20 12:05:51,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:05:51,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:05:51,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:51,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:05:51,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:51,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:05:51,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:51,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-20 12:05:51,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:51,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 12:05:51,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:51,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 12:05:51,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:51,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-20 12:05:51,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:51,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-20 12:05:51,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:51,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-11-20 12:05:51,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:51,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-20 12:05:51,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:51,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-20 12:05:51,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:51,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-11-20 12:05:51,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:51,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-20 12:05:51,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:51,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-11-20 12:05:51,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:51,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-11-20 12:05:51,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:52,120 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-11-20 12:05:52,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:05:52,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907225788] [2022-11-20 12:05:52,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907225788] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:05:52,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:05:52,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 12:05:52,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797937354] [2022-11-20 12:05:52,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:05:52,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 12:05:52,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:05:52,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 12:05:52,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:05:52,122 INFO L87 Difference]: Start difference. First operand 423 states and 503 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2022-11-20 12:05:53,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:05:53,180 INFO L93 Difference]: Finished difference Result 660 states and 793 transitions. [2022-11-20 12:05:53,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:05:53,182 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) Word has length 121 [2022-11-20 12:05:53,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:05:53,184 INFO L225 Difference]: With dead ends: 660 [2022-11-20 12:05:53,185 INFO L226 Difference]: Without dead ends: 414 [2022-11-20 12:05:53,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-20 12:05:53,186 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 66 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 12:05:53,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 261 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 12:05:53,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-11-20 12:05:53,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 409. [2022-11-20 12:05:53,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 304 states have (on average 1.1217105263157894) internal successors, (341), 312 states have internal predecessors, (341), 65 states have call successors, (65), 37 states have call predecessors, (65), 39 states have return successors, (78), 59 states have call predecessors, (78), 64 states have call successors, (78) [2022-11-20 12:05:53,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 484 transitions. [2022-11-20 12:05:53,317 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 484 transitions. Word has length 121 [2022-11-20 12:05:53,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:05:53,317 INFO L495 AbstractCegarLoop]: Abstraction has 409 states and 484 transitions. [2022-11-20 12:05:53,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2022-11-20 12:05:53,318 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 484 transitions. [2022-11-20 12:05:53,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-20 12:05:53,319 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:05:53,320 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:05:53,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-20 12:05:53,320 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:05:53,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:05:53,320 INFO L85 PathProgramCache]: Analyzing trace with hash -568357890, now seen corresponding path program 1 times [2022-11-20 12:05:53,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:05:53,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690868678] [2022-11-20 12:05:53,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:05:53,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:05:53,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:53,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:05:53,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:53,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:05:53,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:53,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-20 12:05:53,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:53,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 12:05:53,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:53,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 12:05:53,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:53,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-20 12:05:53,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:53,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-20 12:05:53,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:53,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-20 12:05:53,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:53,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-20 12:05:53,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:53,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-11-20 12:05:53,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:53,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-11-20 12:05:53,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:53,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-20 12:05:53,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:53,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-11-20 12:05:53,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:53,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-11-20 12:05:53,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:53,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-11-20 12:05:53,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:53,911 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-20 12:05:53,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:05:53,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690868678] [2022-11-20 12:05:53,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690868678] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:05:53,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:05:53,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 12:05:53,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600798157] [2022-11-20 12:05:53,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:05:53,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:05:53,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:05:53,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:05:53,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:05:53,913 INFO L87 Difference]: Start difference. First operand 409 states and 484 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 6 states have internal predecessors, (68), 4 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-20 12:05:54,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:05:54,791 INFO L93 Difference]: Finished difference Result 610 states and 711 transitions. [2022-11-20 12:05:54,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 12:05:54,792 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 6 states have internal predecessors, (68), 4 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 123 [2022-11-20 12:05:54,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:05:54,794 INFO L225 Difference]: With dead ends: 610 [2022-11-20 12:05:54,794 INFO L226 Difference]: Without dead ends: 394 [2022-11-20 12:05:54,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-20 12:05:54,795 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 80 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 12:05:54,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 240 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 12:05:54,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-11-20 12:05:54,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 386. [2022-11-20 12:05:54,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 289 states have (on average 1.1003460207612457) internal successors, (318), 296 states have internal predecessors, (318), 59 states have call successors, (59), 35 states have call predecessors, (59), 37 states have return successors, (72), 54 states have call predecessors, (72), 58 states have call successors, (72) [2022-11-20 12:05:54,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 449 transitions. [2022-11-20 12:05:54,869 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 449 transitions. Word has length 123 [2022-11-20 12:05:54,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:05:54,870 INFO L495 AbstractCegarLoop]: Abstraction has 386 states and 449 transitions. [2022-11-20 12:05:54,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 6 states have internal predecessors, (68), 4 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-20 12:05:54,870 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 449 transitions. [2022-11-20 12:05:54,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-20 12:05:54,871 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:05:54,871 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-20 12:05:54,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-20 12:05:54,872 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:05:54,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:05:54,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1442995555, now seen corresponding path program 1 times [2022-11-20 12:05:54,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:05:54,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198447079] [2022-11-20 12:05:54,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:05:54,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:05:54,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:55,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:05:55,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:55,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:05:55,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:55,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 12:05:55,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:55,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 12:05:55,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:55,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-20 12:05:55,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:55,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-20 12:05:55,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:55,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 12:05:55,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:55,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-20 12:05:55,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:55,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-11-20 12:05:55,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:55,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-20 12:05:55,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:55,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-11-20 12:05:55,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:55,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-11-20 12:05:55,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:55,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-11-20 12:05:55,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:55,742 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-20 12:05:55,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:05:55,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198447079] [2022-11-20 12:05:55,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198447079] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:05:55,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:05:55,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-20 12:05:55,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155507737] [2022-11-20 12:05:55,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:05:55,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 12:05:55,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:05:55,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 12:05:55,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-11-20 12:05:55,744 INFO L87 Difference]: Start difference. First operand 386 states and 449 transitions. Second operand has 11 states, 10 states have (on average 6.1) internal successors, (61), 8 states have internal predecessors, (61), 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) [2022-11-20 12:05:57,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:05:57,324 INFO L93 Difference]: Finished difference Result 403 states and 468 transitions. [2022-11-20 12:05:57,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 12:05:57,324 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 6.1) internal successors, (61), 8 states have internal predecessors, (61), 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 118 [2022-11-20 12:05:57,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:05:57,326 INFO L225 Difference]: With dead ends: 403 [2022-11-20 12:05:57,326 INFO L226 Difference]: Without dead ends: 390 [2022-11-20 12:05:57,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-11-20 12:05:57,328 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 76 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:05:57,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 530 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-20 12:05:57,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-11-20 12:05:57,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 386. [2022-11-20 12:05:57,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 289 states have (on average 1.0968858131487889) internal successors, (317), 296 states have internal predecessors, (317), 59 states have call successors, (59), 35 states have call predecessors, (59), 37 states have return successors, (69), 54 states have call predecessors, (69), 58 states have call successors, (69) [2022-11-20 12:05:57,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 445 transitions. [2022-11-20 12:05:57,428 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 445 transitions. Word has length 118 [2022-11-20 12:05:57,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:05:57,429 INFO L495 AbstractCegarLoop]: Abstraction has 386 states and 445 transitions. [2022-11-20 12:05:57,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 6.1) internal successors, (61), 8 states have internal predecessors, (61), 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) [2022-11-20 12:05:57,429 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 445 transitions. [2022-11-20 12:05:57,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-20 12:05:57,431 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:05:57,431 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-20 12:05:57,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-20 12:05:57,431 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:05:57,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:05:57,432 INFO L85 PathProgramCache]: Analyzing trace with hash -741930977, now seen corresponding path program 1 times [2022-11-20 12:05:57,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:05:57,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921972444] [2022-11-20 12:05:57,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:05:57,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:05:57,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:58,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:05:58,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:58,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:05:58,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:58,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 12:05:58,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:58,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 12:05:58,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:58,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-20 12:05:58,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:59,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-20 12:05:59,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:59,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 12:05:59,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:59,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-20 12:05:59,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:59,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-11-20 12:05:59,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:59,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-20 12:05:59,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:59,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-11-20 12:05:59,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:59,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-11-20 12:05:59,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:59,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-11-20 12:05:59,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:59,691 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-20 12:05:59,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:05:59,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921972444] [2022-11-20 12:05:59,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921972444] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:05:59,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318023516] [2022-11-20 12:05:59,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:05:59,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:05:59,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:05:59,694 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:05:59,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 12:06:00,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:00,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 2718 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-20 12:06:00,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:06:03,066 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 6 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-20 12:06:03,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:06:04,056 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 26 treesize of output 14 [2022-11-20 12:06:04,178 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-20 12:06:04,178 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 29 treesize of output 24 [2022-11-20 12:06:04,276 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-20 12:06:04,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318023516] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:06:04,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:06:04,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 9] total 21 [2022-11-20 12:06:04,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742933558] [2022-11-20 12:06:04,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:06:04,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 12:06:04,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:06:04,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 12:06:04,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-11-20 12:06:04,279 INFO L87 Difference]: Start difference. First operand 386 states and 445 transitions. Second operand has 21 states, 21 states have (on average 5.9523809523809526) internal successors, (125), 20 states have internal predecessors, (125), 5 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) [2022-11-20 12:06:07,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:06:07,699 INFO L93 Difference]: Finished difference Result 425 states and 479 transitions. [2022-11-20 12:06:07,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 12:06:07,700 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.9523809523809526) internal successors, (125), 20 states have internal predecessors, (125), 5 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) Word has length 118 [2022-11-20 12:06:07,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:06:07,702 INFO L225 Difference]: With dead ends: 425 [2022-11-20 12:06:07,702 INFO L226 Difference]: Without dead ends: 333 [2022-11-20 12:06:07,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 237 SyntacticMatches, 18 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=204, Invalid=852, Unknown=0, NotChecked=0, Total=1056 [2022-11-20 12:06:07,703 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 181 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 207 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:06:07,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 477 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 778 Invalid, 0 Unknown, 207 Unchecked, 2.1s Time] [2022-11-20 12:06:07,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-11-20 12:06:07,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 329. [2022-11-20 12:06:07,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 245 states have (on average 1.0979591836734695) internal successors, (269), 250 states have internal predecessors, (269), 49 states have call successors, (49), 34 states have call predecessors, (49), 34 states have return successors, (55), 44 states have call predecessors, (55), 48 states have call successors, (55) [2022-11-20 12:06:07,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 373 transitions. [2022-11-20 12:06:07,794 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 373 transitions. Word has length 118 [2022-11-20 12:06:07,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:06:07,795 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 373 transitions. [2022-11-20 12:06:07,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.9523809523809526) internal successors, (125), 20 states have internal predecessors, (125), 5 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) [2022-11-20 12:06:07,795 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 373 transitions. [2022-11-20 12:06:07,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-20 12:06:07,796 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:06:07,797 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-20 12:06:07,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 12:06:08,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:06:08,006 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:06:08,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:06:08,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1700320804, now seen corresponding path program 1 times [2022-11-20 12:06:08,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:06:08,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134117482] [2022-11-20 12:06:08,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:06:08,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:06:08,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:09,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:06:09,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:09,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:06:09,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:09,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-20 12:06:09,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:09,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 12:06:09,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:10,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 12:06:10,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:10,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-20 12:06:10,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:10,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-20 12:06:10,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:10,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-11-20 12:06:10,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:10,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-20 12:06:10,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:10,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-20 12:06:10,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:10,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-11-20 12:06:10,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:10,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-20 12:06:10,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:10,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-11-20 12:06:10,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:10,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-11-20 12:06:10,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:10,443 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-20 12:06:10,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:06:10,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134117482] [2022-11-20 12:06:10,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134117482] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:06:10,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214007828] [2022-11-20 12:06:10,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:06:10,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:06:10,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:06:10,445 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:06:10,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 12:06:11,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:11,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 2736 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-20 12:06:11,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:06:13,682 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 29 treesize of output 16 [2022-11-20 12:06:13,775 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-20 12:06:13,775 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:06:13,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214007828] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:06:13,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:06:13,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [13] total 19 [2022-11-20 12:06:13,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915640496] [2022-11-20 12:06:13,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:06:13,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 12:06:13,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:06:13,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 12:06:13,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2022-11-20 12:06:13,778 INFO L87 Difference]: Start difference. First operand 329 states and 373 transitions. Second operand has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 5 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-20 12:06:15,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:06:15,150 INFO L93 Difference]: Finished difference Result 359 states and 402 transitions. [2022-11-20 12:06:15,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 12:06:15,150 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 5 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 123 [2022-11-20 12:06:15,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:06:15,152 INFO L225 Difference]: With dead ends: 359 [2022-11-20 12:06:15,152 INFO L226 Difference]: Without dead ends: 333 [2022-11-20 12:06:15,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 132 SyntacticMatches, 14 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2022-11-20 12:06:15,154 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 75 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 756 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:06:15,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 756 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 270 Invalid, 0 Unknown, 38 Unchecked, 1.0s Time] [2022-11-20 12:06:15,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-11-20 12:06:15,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 329. [2022-11-20 12:06:15,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 245 states have (on average 1.0938775510204082) internal successors, (268), 250 states have internal predecessors, (268), 49 states have call successors, (49), 34 states have call predecessors, (49), 34 states have return successors, (55), 44 states have call predecessors, (55), 48 states have call successors, (55) [2022-11-20 12:06:15,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 372 transitions. [2022-11-20 12:06:15,255 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 372 transitions. Word has length 123 [2022-11-20 12:06:15,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:06:15,255 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 372 transitions. [2022-11-20 12:06:15,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 5 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-20 12:06:15,256 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 372 transitions. [2022-11-20 12:06:15,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-20 12:06:15,257 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:06:15,258 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:06:15,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 12:06:15,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:06:15,468 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:06:15,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:06:15,468 INFO L85 PathProgramCache]: Analyzing trace with hash -2021476164, now seen corresponding path program 1 times [2022-11-20 12:06:15,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:06:15,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098308944] [2022-11-20 12:06:15,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:06:15,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:06:15,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:17,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:06:17,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:17,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:06:17,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:17,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-20 12:06:17,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:17,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 12:06:17,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:17,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 12:06:17,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:17,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-20 12:06:17,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:17,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-20 12:06:17,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:17,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-20 12:06:17,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:17,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-20 12:06:17,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:17,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-20 12:06:17,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:18,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-20 12:06:18,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:18,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-11-20 12:06:18,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:18,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-11-20 12:06:18,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:18,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-11-20 12:06:18,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:18,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-11-20 12:06:18,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:18,022 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-11-20 12:06:18,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:06:18,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098308944] [2022-11-20 12:06:18,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098308944] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:06:18,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:06:18,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-11-20 12:06:18,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564031935] [2022-11-20 12:06:18,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:06:18,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 12:06:18,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:06:18,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 12:06:18,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-11-20 12:06:18,025 INFO L87 Difference]: Start difference. First operand 329 states and 372 transitions. Second operand has 17 states, 16 states have (on average 4.5) internal successors, (72), 15 states have internal predecessors, (72), 7 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2022-11-20 12:06:21,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:06:21,441 INFO L93 Difference]: Finished difference Result 471 states and 540 transitions. [2022-11-20 12:06:21,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 12:06:21,441 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.5) internal successors, (72), 15 states have internal predecessors, (72), 7 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) Word has length 127 [2022-11-20 12:06:21,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:06:21,443 INFO L225 Difference]: With dead ends: 471 [2022-11-20 12:06:21,443 INFO L226 Difference]: Without dead ends: 350 [2022-11-20 12:06:21,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2022-11-20 12:06:21,445 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 302 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 995 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 1181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-20 12:06:21,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 405 Invalid, 1181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 995 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-20 12:06:21,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-11-20 12:06:21,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 339. [2022-11-20 12:06:21,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 254 states have (on average 1.094488188976378) internal successors, (278), 260 states have internal predecessors, (278), 49 states have call successors, (49), 34 states have call predecessors, (49), 35 states have return successors, (56), 44 states have call predecessors, (56), 48 states have call successors, (56) [2022-11-20 12:06:21,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 383 transitions. [2022-11-20 12:06:21,529 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 383 transitions. Word has length 127 [2022-11-20 12:06:21,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:06:21,529 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 383 transitions. [2022-11-20 12:06:21,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.5) internal successors, (72), 15 states have internal predecessors, (72), 7 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2022-11-20 12:06:21,529 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 383 transitions. [2022-11-20 12:06:21,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-20 12:06:21,531 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:06:21,531 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:06:21,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-20 12:06:21,532 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:06:21,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:06:21,532 INFO L85 PathProgramCache]: Analyzing trace with hash -760558914, now seen corresponding path program 1 times [2022-11-20 12:06:21,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:06:21,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647425705] [2022-11-20 12:06:21,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:06:21,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:06:21,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:21,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:06:21,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:21,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:06:21,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:21,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-20 12:06:21,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:21,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 12:06:21,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:21,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 12:06:21,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:21,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-20 12:06:21,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:21,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-20 12:06:21,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:21,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-20 12:06:21,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:21,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-20 12:06:21,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:21,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-20 12:06:21,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:21,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-20 12:06:21,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:21,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-11-20 12:06:21,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:21,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-11-20 12:06:21,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:21,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-11-20 12:06:21,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:21,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-11-20 12:06:21,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:21,899 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-20 12:06:21,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:06:21,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647425705] [2022-11-20 12:06:21,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647425705] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:06:21,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:06:21,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 12:06:21,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029314713] [2022-11-20 12:06:21,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:06:21,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 12:06:21,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:06:21,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 12:06:21,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:06:21,902 INFO L87 Difference]: Start difference. First operand 339 states and 383 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-20 12:06:22,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:06:22,570 INFO L93 Difference]: Finished difference Result 528 states and 593 transitions. [2022-11-20 12:06:22,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:06:22,571 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 127 [2022-11-20 12:06:22,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:06:22,572 INFO L225 Difference]: With dead ends: 528 [2022-11-20 12:06:22,573 INFO L226 Difference]: Without dead ends: 339 [2022-11-20 12:06:22,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-20 12:06:22,574 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 61 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 12:06:22,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 213 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 12:06:22,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-11-20 12:06:22,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 339. [2022-11-20 12:06:22,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 254 states have (on average 1.078740157480315) internal successors, (274), 260 states have internal predecessors, (274), 49 states have call successors, (49), 34 states have call predecessors, (49), 35 states have return successors, (56), 44 states have call predecessors, (56), 48 states have call successors, (56) [2022-11-20 12:06:22,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 379 transitions. [2022-11-20 12:06:22,674 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 379 transitions. Word has length 127 [2022-11-20 12:06:22,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:06:22,675 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 379 transitions. [2022-11-20 12:06:22,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-20 12:06:22,675 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 379 transitions. [2022-11-20 12:06:22,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-20 12:06:22,677 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:06:22,677 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 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, 1] [2022-11-20 12:06:22,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-11-20 12:06:22,678 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:06:22,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:06:22,678 INFO L85 PathProgramCache]: Analyzing trace with hash 318196464, now seen corresponding path program 1 times [2022-11-20 12:06:22,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:06:22,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393711145] [2022-11-20 12:06:22,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:06:22,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:06:22,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:23,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:06:23,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:23,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:06:23,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:23,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 12:06:23,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:23,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 12:06:23,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:23,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-20 12:06:23,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:23,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-20 12:06:23,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:23,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-20 12:06:23,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:23,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-20 12:06:23,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:23,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-20 12:06:23,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:23,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-11-20 12:06:23,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:23,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-11-20 12:06:23,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:23,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-11-20 12:06:23,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:23,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-11-20 12:06:23,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:23,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-11-20 12:06:23,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:24,110 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-11-20 12:06:24,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:06:24,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393711145] [2022-11-20 12:06:24,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393711145] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:06:24,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:06:24,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-20 12:06:24,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930363945] [2022-11-20 12:06:24,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:06:24,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 12:06:24,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:06:24,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 12:06:24,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-11-20 12:06:24,112 INFO L87 Difference]: Start difference. First operand 339 states and 379 transitions. Second operand has 12 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 5 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-20 12:06:26,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:06:26,055 INFO L93 Difference]: Finished difference Result 354 states and 399 transitions. [2022-11-20 12:06:26,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 12:06:26,057 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 5 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) Word has length 123 [2022-11-20 12:06:26,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:06:26,058 INFO L225 Difference]: With dead ends: 354 [2022-11-20 12:06:26,059 INFO L226 Difference]: Without dead ends: 347 [2022-11-20 12:06:26,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-11-20 12:06:26,060 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 106 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-20 12:06:26,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 353 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-20 12:06:26,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-11-20 12:06:26,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 346. [2022-11-20 12:06:26,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 259 states have (on average 1.0772200772200773) internal successors, (279), 267 states have internal predecessors, (279), 50 states have call successors, (50), 34 states have call predecessors, (50), 36 states have return successors, (62), 44 states have call predecessors, (62), 49 states have call successors, (62) [2022-11-20 12:06:26,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 391 transitions. [2022-11-20 12:06:26,173 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 391 transitions. Word has length 123 [2022-11-20 12:06:26,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:06:26,174 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 391 transitions. [2022-11-20 12:06:26,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 5 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-20 12:06:26,174 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 391 transitions. [2022-11-20 12:06:26,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-20 12:06:26,175 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:06:26,175 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 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, 1, 1] [2022-11-20 12:06:26,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-11-20 12:06:26,176 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:06:26,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:06:26,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1770808337, now seen corresponding path program 1 times [2022-11-20 12:06:26,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:06:26,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965014956] [2022-11-20 12:06:26,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:06:26,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:06:26,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:27,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:06:27,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:27,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:06:27,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:27,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-20 12:06:27,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:27,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 12:06:27,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:27,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 12:06:27,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:27,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-20 12:06:27,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:27,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-20 12:06:27,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:27,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-20 12:06:27,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:27,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-20 12:06:27,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:27,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-11-20 12:06:27,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:27,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-11-20 12:06:27,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:27,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-11-20 12:06:27,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:27,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-11-20 12:06:27,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:27,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-11-20 12:06:27,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:27,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-11-20 12:06:27,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:27,607 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-11-20 12:06:27,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:06:27,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965014956] [2022-11-20 12:06:27,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965014956] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:06:27,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:06:27,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-20 12:06:27,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660975687] [2022-11-20 12:06:27,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:06:27,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 12:06:27,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:06:27,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 12:06:27,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-20 12:06:27,608 INFO L87 Difference]: Start difference. First operand 346 states and 391 transitions. Second operand has 11 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-20 12:06:29,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:06:29,228 INFO L93 Difference]: Finished difference Result 354 states and 398 transitions. [2022-11-20 12:06:29,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 12:06:29,229 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) Word has length 128 [2022-11-20 12:06:29,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:06:29,231 INFO L225 Difference]: With dead ends: 354 [2022-11-20 12:06:29,231 INFO L226 Difference]: Without dead ends: 347 [2022-11-20 12:06:29,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-11-20 12:06:29,232 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 80 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:06:29,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 349 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-20 12:06:29,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-11-20 12:06:29,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 341. [2022-11-20 12:06:29,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 255 states have (on average 1.0784313725490196) internal successors, (275), 262 states have internal predecessors, (275), 50 states have call successors, (50), 34 states have call predecessors, (50), 35 states have return successors, (57), 44 states have call predecessors, (57), 49 states have call successors, (57) [2022-11-20 12:06:29,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 382 transitions. [2022-11-20 12:06:29,310 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 382 transitions. Word has length 128 [2022-11-20 12:06:29,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:06:29,310 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 382 transitions. [2022-11-20 12:06:29,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-20 12:06:29,310 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 382 transitions. [2022-11-20 12:06:29,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-20 12:06:29,312 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:06:29,312 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-20 12:06:29,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-11-20 12:06:29,312 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:06:29,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:06:29,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1214787142, now seen corresponding path program 1 times [2022-11-20 12:06:29,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:06:29,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595172534] [2022-11-20 12:06:29,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:06:29,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:06:29,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:31,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:06:31,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:31,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:06:31,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:31,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 12:06:31,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:31,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 12:06:31,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:31,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-20 12:06:31,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:31,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-20 12:06:31,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:31,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 12:06:31,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:31,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-20 12:06:31,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:31,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-11-20 12:06:31,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:31,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-20 12:06:31,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:31,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-11-20 12:06:31,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:31,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-11-20 12:06:31,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:31,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-11-20 12:06:31,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:31,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-11-20 12:06:31,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:31,750 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-20 12:06:31,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:06:31,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595172534] [2022-11-20 12:06:31,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595172534] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:06:31,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117353806] [2022-11-20 12:06:31,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:06:31,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:06:31,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:06:31,752 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:06:31,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 12:06:32,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:32,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 2749 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-20 12:06:32,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:06:32,779 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 [2022-11-20 12:06:34,220 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 [2022-11-20 12:06:34,225 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 16 treesize of output 8 [2022-11-20 12:06:34,344 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-20 12:06:34,345 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:06:34,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117353806] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:06:34,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:06:34,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [14] total 26 [2022-11-20 12:06:34,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083930825] [2022-11-20 12:06:34,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:06:34,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 12:06:34,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:06:34,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 12:06:34,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-11-20 12:06:34,347 INFO L87 Difference]: Start difference. First operand 341 states and 382 transitions. Second operand has 14 states, 14 states have (on average 5.714285714285714) internal successors, (80), 10 states have internal predecessors, (80), 5 states have call successors, (15), 4 states have call predecessors, (15), 5 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-20 12:06:34,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:06:34,805 INFO L93 Difference]: Finished difference Result 397 states and 437 transitions. [2022-11-20 12:06:34,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 12:06:34,806 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.714285714285714) internal successors, (80), 10 states have internal predecessors, (80), 5 states have call successors, (15), 4 states have call predecessors, (15), 5 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 124 [2022-11-20 12:06:34,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:06:34,807 INFO L225 Difference]: With dead ends: 397 [2022-11-20 12:06:34,807 INFO L226 Difference]: Without dead ends: 274 [2022-11-20 12:06:34,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2022-11-20 12:06:34,808 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 47 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:06:34,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 575 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 45 Unchecked, 0.3s Time] [2022-11-20 12:06:34,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-11-20 12:06:34,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 274. [2022-11-20 12:06:34,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 203 states have (on average 1.0738916256157636) internal successors, (218), 209 states have internal predecessors, (218), 41 states have call successors, (41), 28 states have call predecessors, (41), 29 states have return successors, (45), 36 states have call predecessors, (45), 40 states have call successors, (45) [2022-11-20 12:06:34,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 304 transitions. [2022-11-20 12:06:34,894 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 304 transitions. Word has length 124 [2022-11-20 12:06:34,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:06:34,895 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 304 transitions. [2022-11-20 12:06:34,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.714285714285714) internal successors, (80), 10 states have internal predecessors, (80), 5 states have call successors, (15), 4 states have call predecessors, (15), 5 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-20 12:06:34,895 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 304 transitions. [2022-11-20 12:06:34,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-20 12:06:34,896 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:06:34,896 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-20 12:06:34,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 12:06:35,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:06:35,107 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:06:35,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:06:35,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1204400987, now seen corresponding path program 1 times [2022-11-20 12:06:35,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:06:35,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622940441] [2022-11-20 12:06:35,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:06:35,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:06:35,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:36,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:06:36,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:36,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:06:36,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:36,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 12:06:36,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:36,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 12:06:36,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:36,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-20 12:06:36,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:36,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-20 12:06:36,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:36,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-20 12:06:36,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:36,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-20 12:06:36,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:36,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-20 12:06:36,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:36,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-11-20 12:06:36,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:36,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-11-20 12:06:36,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:36,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-11-20 12:06:36,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:36,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-11-20 12:06:36,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:36,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-11-20 12:06:36,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:36,528 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-11-20 12:06:36,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:06:36,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622940441] [2022-11-20 12:06:36,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622940441] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:06:36,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:06:36,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-20 12:06:36,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917450245] [2022-11-20 12:06:36,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:06:36,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 12:06:36,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:06:36,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 12:06:36,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-20 12:06:36,531 INFO L87 Difference]: Start difference. First operand 274 states and 304 transitions. Second operand has 10 states, 9 states have (on average 8.11111111111111) internal successors, (73), 9 states have internal predecessors, (73), 5 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-20 12:06:37,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:06:37,843 INFO L93 Difference]: Finished difference Result 281 states and 310 transitions. [2022-11-20 12:06:37,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 12:06:37,844 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.11111111111111) internal successors, (73), 9 states have internal predecessors, (73), 5 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) Word has length 125 [2022-11-20 12:06:37,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:06:37,845 INFO L225 Difference]: With dead ends: 281 [2022-11-20 12:06:37,845 INFO L226 Difference]: Without dead ends: 272 [2022-11-20 12:06:37,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-11-20 12:06:37,845 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 68 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:06:37,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 264 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 12:06:37,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-11-20 12:06:37,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 267. [2022-11-20 12:06:37,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 198 states have (on average 1.0606060606060606) internal successors, (210), 202 states have internal predecessors, (210), 40 states have call successors, (40), 28 states have call predecessors, (40), 28 states have return successors, (41), 36 states have call predecessors, (41), 39 states have call successors, (41) [2022-11-20 12:06:37,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 291 transitions. [2022-11-20 12:06:37,901 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 291 transitions. Word has length 125 [2022-11-20 12:06:37,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:06:37,902 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 291 transitions. [2022-11-20 12:06:37,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.11111111111111) internal successors, (73), 9 states have internal predecessors, (73), 5 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-20 12:06:37,902 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 291 transitions. [2022-11-20 12:06:37,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-20 12:06:37,903 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:06:37,903 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:06:37,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-11-20 12:06:37,903 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:06:37,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:06:37,904 INFO L85 PathProgramCache]: Analyzing trace with hash -342283388, now seen corresponding path program 1 times [2022-11-20 12:06:37,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:06:37,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055973873] [2022-11-20 12:06:37,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:06:37,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:06:38,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:38,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:06:38,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:38,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:06:38,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:38,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-20 12:06:38,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:38,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 12:06:38,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:38,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 12:06:38,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:38,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-20 12:06:38,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:38,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-20 12:06:38,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:38,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-20 12:06:38,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:38,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-20 12:06:38,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:39,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-11-20 12:06:39,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:39,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-11-20 12:06:39,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:39,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-11-20 12:06:39,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:39,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-11-20 12:06:39,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:39,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-11-20 12:06:39,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:39,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-11-20 12:06:39,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:39,144 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-20 12:06:39,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:06:39,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055973873] [2022-11-20 12:06:39,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055973873] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:06:39,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545639745] [2022-11-20 12:06:39,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:06:39,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:06:39,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:06:39,149 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:06:39,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 12:06:39,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:39,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 2799 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 12:06:39,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:06:39,969 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-20 12:06:39,969 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:06:39,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545639745] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:06:39,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:06:39,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 13 [2022-11-20 12:06:39,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881125519] [2022-11-20 12:06:39,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:06:39,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 12:06:39,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:06:39,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 12:06:39,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-11-20 12:06:39,971 INFO L87 Difference]: Start difference. First operand 267 states and 291 transitions. Second operand has 10 states, 9 states have (on average 8.222222222222221) internal successors, (74), 9 states have internal predecessors, (74), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-20 12:06:40,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:06:40,371 INFO L93 Difference]: Finished difference Result 388 states and 425 transitions. [2022-11-20 12:06:40,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 12:06:40,372 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.222222222222221) internal successors, (74), 9 states have internal predecessors, (74), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 131 [2022-11-20 12:06:40,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:06:40,373 INFO L225 Difference]: With dead ends: 388 [2022-11-20 12:06:40,373 INFO L226 Difference]: Without dead ends: 272 [2022-11-20 12:06:40,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-20 12:06:40,374 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 14 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:06:40,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 867 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:06:40,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-11-20 12:06:40,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 272. [2022-11-20 12:06:40,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 202 states have (on average 1.0594059405940595) internal successors, (214), 207 states have internal predecessors, (214), 40 states have call successors, (40), 28 states have call predecessors, (40), 29 states have return successors, (42), 36 states have call predecessors, (42), 39 states have call successors, (42) [2022-11-20 12:06:40,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 296 transitions. [2022-11-20 12:06:40,422 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 296 transitions. Word has length 131 [2022-11-20 12:06:40,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:06:40,422 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 296 transitions. [2022-11-20 12:06:40,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.222222222222221) internal successors, (74), 9 states have internal predecessors, (74), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-20 12:06:40,422 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 296 transitions. [2022-11-20 12:06:40,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-11-20 12:06:40,424 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:06:40,424 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1] [2022-11-20 12:06:40,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 12:06:40,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-20 12:06:40,634 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:06:40,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:06:40,635 INFO L85 PathProgramCache]: Analyzing trace with hash 193693229, now seen corresponding path program 1 times [2022-11-20 12:06:40,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:06:40,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757555230] [2022-11-20 12:06:40,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:06:40,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:06:40,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:42,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:06:42,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:42,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:06:42,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:42,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-20 12:06:42,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:43,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 12:06:43,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:43,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 12:06:43,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:43,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-20 12:06:43,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:43,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-20 12:06:43,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:43,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-20 12:06:43,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:43,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-20 12:06:43,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:43,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-11-20 12:06:43,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:43,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-20 12:06:43,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:43,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-11-20 12:06:43,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:43,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-11-20 12:06:43,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:43,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-11-20 12:06:43,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:43,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-11-20 12:06:43,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:43,463 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 27 proven. 6 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-20 12:06:43,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:06:43,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757555230] [2022-11-20 12:06:43,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757555230] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:06:43,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604665113] [2022-11-20 12:06:43,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:06:43,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:06:43,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:06:43,466 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:06:43,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 12:06:44,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:44,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 2806 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-20 12:06:44,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:06:45,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:06:45,186 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 12:06:45,187 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 [2022-11-20 12:06:45,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:06:45,426 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 35 treesize of output 30 [2022-11-20 12:06:49,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 11 [2022-11-20 12:06:49,690 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 28 proven. 18 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-20 12:06:49,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:06:51,173 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-11-20 12:06:51,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604665113] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 12:06:51,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:06:51,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [18, 18] total 37 [2022-11-20 12:06:51,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987321304] [2022-11-20 12:06:51,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:06:51,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 12:06:51,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:06:51,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 12:06:51,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1216, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 12:06:51,175 INFO L87 Difference]: Start difference. First operand 272 states and 296 transitions. Second operand has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-20 12:06:52,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:06:52,512 INFO L93 Difference]: Finished difference Result 377 states and 419 transitions. [2022-11-20 12:06:52,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 12:06:52,513 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) Word has length 133 [2022-11-20 12:06:52,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:06:52,514 INFO L225 Difference]: With dead ends: 377 [2022-11-20 12:06:52,514 INFO L226 Difference]: Without dead ends: 270 [2022-11-20 12:06:52,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 261 SyntacticMatches, 15 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=135, Invalid=1425, Unknown=0, NotChecked=0, Total=1560 [2022-11-20 12:06:52,515 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 63 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 12:06:52,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 619 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 12:06:52,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-11-20 12:06:52,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 266. [2022-11-20 12:06:52,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 197 states have (on average 1.0558375634517767) internal successors, (208), 201 states have internal predecessors, (208), 40 states have call successors, (40), 28 states have call predecessors, (40), 28 states have return successors, (40), 36 states have call predecessors, (40), 39 states have call successors, (40) [2022-11-20 12:06:52,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 288 transitions. [2022-11-20 12:06:52,571 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 288 transitions. Word has length 133 [2022-11-20 12:06:52,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:06:52,572 INFO L495 AbstractCegarLoop]: Abstraction has 266 states and 288 transitions. [2022-11-20 12:06:52,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-20 12:06:52,572 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 288 transitions. [2022-11-20 12:06:52,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-11-20 12:06:52,573 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:06:52,573 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1] [2022-11-20 12:06:52,582 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-20 12:06:52,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-20 12:06:52,774 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:06:52,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:06:52,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1454610479, now seen corresponding path program 1 times [2022-11-20 12:06:52,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:06:52,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991631994] [2022-11-20 12:06:52,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:06:52,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:06:54,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:07:02,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:07:02,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:07:02,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:07:02,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:07:02,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-20 12:07:02,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:07:02,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 12:07:02,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:07:02,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 12:07:02,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:07:02,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-20 12:07:02,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:07:02,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-20 12:07:02,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:07:02,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-20 12:07:02,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:07:03,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-20 12:07:03,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:07:03,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-11-20 12:07:03,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:07:03,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-20 12:07:03,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:07:03,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-11-20 12:07:03,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:07:03,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-11-20 12:07:03,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:07:03,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-11-20 12:07:03,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:07:03,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-11-20 12:07:03,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:07:03,271 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-20 12:07:03,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:07:03,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991631994] [2022-11-20 12:07:03,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991631994] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:07:03,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074784293] [2022-11-20 12:07:03,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:07:03,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:07:03,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:07:03,274 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:07:03,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 12:07:04,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:07:04,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 2811 conjuncts, 185 conjunts are in the unsatisfiable core [2022-11-20 12:07:04,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:07:04,170 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 [2022-11-20 12:07:05,270 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 12:07:05,270 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 [2022-11-20 12:07:05,536 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 21 treesize of output 20 [2022-11-20 12:07:05,553 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 [2022-11-20 12:07:05,583 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 [2022-11-20 12:07:10,923 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 12:07:10,923 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 15 treesize of output 15 [2022-11-20 12:07:11,513 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 [2022-11-20 12:07:11,535 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 51 treesize of output 47 [2022-11-20 12:07:11,576 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:07:11,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:07:11,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2022-11-20 12:07:13,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:07:13,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:07:13,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:07:13,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:07:13,728 INFO L321 Elim1Store]: treesize reduction 92, result has 1.1 percent of original size [2022-11-20 12:07:13,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 7 case distinctions, treesize of input 134 treesize of output 126 [2022-11-20 12:07:13,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:07:13,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 101 [2022-11-20 12:07:13,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:07:13,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 125 [2022-11-20 12:07:33,960 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 42 treesize of output 30 [2022-11-20 12:07:33,975 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 66 treesize of output 46 [2022-11-20 12:07:36,089 INFO L321 Elim1Store]: treesize reduction 104, result has 43.8 percent of original size [2022-11-20 12:07:36,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 28 case distinctions, treesize of input 176 treesize of output 180 [2022-11-20 12:07:36,799 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 21 proven. 46 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-20 12:07:36,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:07:50,845 WARN L233 SmtUtils]: Spent 8.09s on a formula simplification that was a NOOP. DAG size: 63 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:07:59,646 WARN L233 SmtUtils]: Spent 8.08s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:08:04,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074784293] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:08:04,474 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:08:04,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 40] total 55 [2022-11-20 12:08:04,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514379459] [2022-11-20 12:08:04,474 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:08:04,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-20 12:08:04,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:08:04,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-20 12:08:04,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=4411, Unknown=6, NotChecked=0, Total=4692 [2022-11-20 12:08:04,477 INFO L87 Difference]: Start difference. First operand 266 states and 288 transitions. Second operand has 55 states, 47 states have (on average 3.127659574468085) internal successors, (147), 43 states have internal predecessors, (147), 18 states have call successors, (32), 11 states have call predecessors, (32), 11 states have return successors, (29), 14 states have call predecessors, (29), 15 states have call successors, (29) [2022-11-20 12:08:16,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:08:16,870 INFO L93 Difference]: Finished difference Result 298 states and 319 transitions. [2022-11-20 12:08:16,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-20 12:08:16,871 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 47 states have (on average 3.127659574468085) internal successors, (147), 43 states have internal predecessors, (147), 18 states have call successors, (32), 11 states have call predecessors, (32), 11 states have return successors, (29), 14 states have call predecessors, (29), 15 states have call successors, (29) Word has length 133 [2022-11-20 12:08:16,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:08:16,873 INFO L225 Difference]: With dead ends: 298 [2022-11-20 12:08:16,873 INFO L226 Difference]: Without dead ends: 289 [2022-11-20 12:08:16,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 177 SyntacticMatches, 19 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3030 ImplicationChecksByTransitivity, 55.0s TimeCoverageRelationStatistics Valid=562, Invalid=8362, Unknown=6, NotChecked=0, Total=8930 [2022-11-20 12:08:16,876 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 128 mSDsluCounter, 1081 mSDsCounter, 0 mSdLazyCounter, 1247 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 1143 SdHoareTripleChecker+Invalid, 2170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 864 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-20 12:08:16,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 1143 Invalid, 2170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1247 Invalid, 0 Unknown, 864 Unchecked, 3.4s Time] [2022-11-20 12:08:16,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-11-20 12:08:16,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 165. [2022-11-20 12:08:16,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 128 states have (on average 1.0546875) internal successors, (135), 128 states have internal predecessors, (135), 19 states have call successors, (19), 18 states have call predecessors, (19), 17 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-20 12:08:16,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 172 transitions. [2022-11-20 12:08:16,933 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 172 transitions. Word has length 133 [2022-11-20 12:08:16,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:08:16,933 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 172 transitions. [2022-11-20 12:08:16,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 47 states have (on average 3.127659574468085) internal successors, (147), 43 states have internal predecessors, (147), 18 states have call successors, (32), 11 states have call predecessors, (32), 11 states have return successors, (29), 14 states have call predecessors, (29), 15 states have call successors, (29) [2022-11-20 12:08:16,934 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 172 transitions. [2022-11-20 12:08:16,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-20 12:08:16,935 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:08:16,935 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:08:16,955 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-20 12:08:17,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-20 12:08:17,146 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:08:17,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:08:17,146 INFO L85 PathProgramCache]: Analyzing trace with hash 777078601, now seen corresponding path program 1 times [2022-11-20 12:08:17,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:08:17,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002718674] [2022-11-20 12:08:17,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:08:17,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:08:17,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:08:20,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:08:20,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:08:20,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:08:20,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:08:20,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 12:08:20,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:08:20,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 12:08:20,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:08:20,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-20 12:08:20,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:08:20,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-20 12:08:20,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:08:20,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-20 12:08:20,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:08:20,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-20 12:08:20,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:08:20,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-20 12:08:20,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:08:20,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-11-20 12:08:20,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:08:20,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-11-20 12:08:20,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:08:20,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-11-20 12:08:20,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:08:20,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-11-20 12:08:20,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:08:20,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-11-20 12:08:20,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:08:20,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-11-20 12:08:20,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:08:20,544 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-20 12:08:20,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:08:20,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002718674] [2022-11-20 12:08:20,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002718674] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:08:20,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:08:20,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-11-20 12:08:20,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646030692] [2022-11-20 12:08:20,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:08:20,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 12:08:20,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:08:20,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 12:08:20,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2022-11-20 12:08:20,546 INFO L87 Difference]: Start difference. First operand 165 states and 172 transitions. Second operand has 17 states, 15 states have (on average 4.266666666666667) internal successors, (64), 15 states have internal predecessors, (64), 10 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 9 states have call predecessors, (15), 10 states have call successors, (15) [2022-11-20 12:08:23,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:08:23,996 INFO L93 Difference]: Finished difference Result 199 states and 207 transitions. [2022-11-20 12:08:23,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 12:08:23,997 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 4.266666666666667) internal successors, (64), 15 states have internal predecessors, (64), 10 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 9 states have call predecessors, (15), 10 states have call successors, (15) Word has length 129 [2022-11-20 12:08:23,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:08:23,997 INFO L225 Difference]: With dead ends: 199 [2022-11-20 12:08:23,998 INFO L226 Difference]: Without dead ends: 165 [2022-11-20 12:08:23,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-11-20 12:08:23,998 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 154 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:08:23,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 282 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-20 12:08:23,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-11-20 12:08:24,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2022-11-20 12:08:24,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 128 states have (on average 1.046875) internal successors, (134), 128 states have internal predecessors, (134), 19 states have call successors, (19), 18 states have call predecessors, (19), 17 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-20 12:08:24,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 171 transitions. [2022-11-20 12:08:24,036 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 171 transitions. Word has length 129 [2022-11-20 12:08:24,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:08:24,036 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 171 transitions. [2022-11-20 12:08:24,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 4.266666666666667) internal successors, (64), 15 states have internal predecessors, (64), 10 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 9 states have call predecessors, (15), 10 states have call successors, (15) [2022-11-20 12:08:24,037 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 171 transitions. [2022-11-20 12:08:24,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-20 12:08:24,037 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:08:24,037 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:08:24,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-11-20 12:08:24,037 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:08:24,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:08:24,038 INFO L85 PathProgramCache]: Analyzing trace with hash 371625939, now seen corresponding path program 1 times [2022-11-20 12:08:24,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:08:24,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553321383] [2022-11-20 12:08:24,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:08:24,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:08:25,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:08:28,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:08:28,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:08:28,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:08:28,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:08:28,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 12:08:28,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:08:28,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 12:08:28,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:08:28,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-20 12:08:28,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:08:28,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-20 12:08:28,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:08:28,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-20 12:08:28,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:08:28,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-20 12:08:28,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:08:28,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-20 12:08:28,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:08:28,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-11-20 12:08:28,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:08:28,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-11-20 12:08:28,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:08:28,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-11-20 12:08:28,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:08:28,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-11-20 12:08:28,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:08:28,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-11-20 12:08:28,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:08:28,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:08:28,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:08:28,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-11-20 12:08:28,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:08:29,200 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-20 12:08:29,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:08:29,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553321383] [2022-11-20 12:08:29,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553321383] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:08:29,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643934924] [2022-11-20 12:08:29,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:08:29,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:08:29,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:08:29,202 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:08:29,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 12:08:29,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:08:29,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 2799 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-20 12:08:29,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:08:29,907 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 [2022-11-20 12:08:30,512 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 12:08:30,512 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 [2022-11-20 12:08:30,538 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 [2022-11-20 12:08:31,766 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-11-20 12:08:31,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 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 [2022-11-20 12:08:31,932 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 19 treesize of output 21 [2022-11-20 12:08:34,280 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 19 treesize of output 21 [2022-11-20 12:08:52,841 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 29 proven. 27 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-20 12:08:52,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:08:53,712 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2424 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_save_byte_from_array_~storage#1.base| v_ArrVal_2424) |c_ULTIMATE.start_aws_byte_buf_write_from_whole_string_harness_~#buf~3#1.base|) (+ |c_ULTIMATE.start_aws_byte_buf_write_from_whole_string_harness_~#buf~3#1.offset| 16)) 18446744073709551616) 0))) is different from false [2022-11-20 12:08:53,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643934924] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:08:53,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:08:53,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 37 [2022-11-20 12:08:53,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289005502] [2022-11-20 12:08:53,724 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:08:53,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-20 12:08:53,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:08:53,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-20 12:08:53,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1483, Unknown=5, NotChecked=78, Total=1722 [2022-11-20 12:08:53,725 INFO L87 Difference]: Start difference. First operand 165 states and 171 transitions. Second operand has 37 states, 35 states have (on average 4.285714285714286) internal successors, (150), 35 states have internal predecessors, (150), 17 states have call successors, (32), 7 states have call predecessors, (32), 10 states have return successors, (31), 13 states have call predecessors, (31), 16 states have call successors, (31) [2022-11-20 12:08:57,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:08:57,698 INFO L93 Difference]: Finished difference Result 192 states and 196 transitions. [2022-11-20 12:08:57,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-20 12:08:57,698 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 4.285714285714286) internal successors, (150), 35 states have internal predecessors, (150), 17 states have call successors, (32), 7 states have call predecessors, (32), 10 states have return successors, (31), 13 states have call predecessors, (31), 16 states have call successors, (31) Word has length 135 [2022-11-20 12:08:57,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:08:57,699 INFO L225 Difference]: With dead ends: 192 [2022-11-20 12:08:57,699 INFO L226 Difference]: Without dead ends: 163 [2022-11-20 12:08:57,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 210 SyntacticMatches, 22 SemanticMatches, 61 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1523 ImplicationChecksByTransitivity, 25.3s TimeCoverageRelationStatistics Valid=344, Invalid=3436, Unknown=6, NotChecked=120, Total=3906 [2022-11-20 12:08:57,701 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 168 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 1083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 307 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-20 12:08:57,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 739 Invalid, 1083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 743 Invalid, 0 Unknown, 307 Unchecked, 1.6s Time] [2022-11-20 12:08:57,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-11-20 12:08:57,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 158. [2022-11-20 12:08:57,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 121 states have (on average 1.024793388429752) internal successors, (124), 121 states have internal predecessors, (124), 19 states have call successors, (19), 18 states have call predecessors, (19), 17 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-20 12:08:57,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 161 transitions. [2022-11-20 12:08:57,736 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 161 transitions. Word has length 135 [2022-11-20 12:08:57,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:08:57,736 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 161 transitions. [2022-11-20 12:08:57,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 4.285714285714286) internal successors, (150), 35 states have internal predecessors, (150), 17 states have call successors, (32), 7 states have call predecessors, (32), 10 states have return successors, (31), 13 states have call predecessors, (31), 16 states have call successors, (31) [2022-11-20 12:08:57,736 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 161 transitions. [2022-11-20 12:08:57,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-20 12:08:57,737 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:08:57,737 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2022-11-20 12:08:57,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 12:08:57,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:08:57,938 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:08:57,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:08:57,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1474887401, now seen corresponding path program 1 times [2022-11-20 12:08:57,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:08:57,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360040569] [2022-11-20 12:08:57,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:08:57,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:08:58,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:03,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:09:03,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:03,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:09:03,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:03,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 12:09:03,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:04,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 12:09:04,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:04,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-20 12:09:04,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:05,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-20 12:09:05,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:05,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-20 12:09:05,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:05,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-20 12:09:05,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:05,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-20 12:09:05,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:05,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-11-20 12:09:05,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:05,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-11-20 12:09:05,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:05,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-11-20 12:09:05,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:05,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-11-20 12:09:05,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:05,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-11-20 12:09:05,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:05,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:09:05,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:05,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-11-20 12:09:05,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:06,294 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-20 12:09:06,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:09:06,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360040569] [2022-11-20 12:09:06,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360040569] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:09:06,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743754627] [2022-11-20 12:09:06,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:09:06,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:09:06,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:09:06,296 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:09:06,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 12:09:06,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:06,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 2801 conjuncts, 99 conjunts are in the unsatisfiable core [2022-11-20 12:09:06,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:09:06,989 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 [2022-11-20 12:09:07,693 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 [2022-11-20 12:09:07,820 WARN L859 $PredicateComparison]: unable to prove that (exists ((|bounded_malloc_#res.base| Int)) (and (exists ((v_ArrVal_2526 Int)) (= |c_#valid| (store |c_old(#valid)| |bounded_malloc_#res.base| v_ArrVal_2526))) (< |bounded_malloc_#res.base| |c_#StackHeapBarrier|))) is different from true [2022-11-20 12:09:07,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:09:07,842 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 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 12:09:07,870 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 13 treesize of output 9 [2022-11-20 12:09:10,393 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 12:09:10,393 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 15 treesize of output 15 [2022-11-20 12:09:10,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-20 12:09:13,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-20 12:09:37,954 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 29 proven. 27 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-20 12:09:37,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:09:40,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743754627] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:09:40,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:09:40,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 25] total 53 [2022-11-20 12:09:40,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957090208] [2022-11-20 12:09:40,687 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:09:40,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-20 12:09:40,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:09:40,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-20 12:09:40,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=3277, Unknown=3, NotChecked=116, Total=3660 [2022-11-20 12:09:40,689 INFO L87 Difference]: Start difference. First operand 158 states and 161 transitions. Second operand has 53 states, 49 states have (on average 3.020408163265306) internal successors, (148), 46 states have internal predecessors, (148), 22 states have call successors, (32), 8 states have call predecessors, (32), 12 states have return successors, (31), 18 states have call predecessors, (31), 21 states have call successors, (31) [2022-11-20 12:09:50,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:09:50,009 INFO L93 Difference]: Finished difference Result 168 states and 170 transitions. [2022-11-20 12:09:50,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-20 12:09:50,009 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 49 states have (on average 3.020408163265306) internal successors, (148), 46 states have internal predecessors, (148), 22 states have call successors, (32), 8 states have call predecessors, (32), 12 states have return successors, (31), 18 states have call predecessors, (31), 21 states have call successors, (31) Word has length 135 [2022-11-20 12:09:50,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:09:50,010 INFO L225 Difference]: With dead ends: 168 [2022-11-20 12:09:50,010 INFO L226 Difference]: Without dead ends: 158 [2022-11-20 12:09:50,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 202 SyntacticMatches, 18 SemanticMatches, 87 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2510 ImplicationChecksByTransitivity, 40.7s TimeCoverageRelationStatistics Valid=512, Invalid=7144, Unknown=4, NotChecked=172, Total=7832 [2022-11-20 12:09:50,011 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 85 mSDsluCounter, 1109 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 1169 SdHoareTripleChecker+Invalid, 1423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 592 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:09:50,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 1169 Invalid, 1423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 791 Invalid, 0 Unknown, 592 Unchecked, 2.1s Time] [2022-11-20 12:09:50,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-11-20 12:09:50,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2022-11-20 12:09:50,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 121 states have (on average 1.0165289256198347) internal successors, (123), 121 states have internal predecessors, (123), 19 states have call successors, (19), 18 states have call predecessors, (19), 17 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-20 12:09:50,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 160 transitions. [2022-11-20 12:09:50,050 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 160 transitions. Word has length 135 [2022-11-20 12:09:50,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:09:50,050 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 160 transitions. [2022-11-20 12:09:50,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 49 states have (on average 3.020408163265306) internal successors, (148), 46 states have internal predecessors, (148), 22 states have call successors, (32), 8 states have call predecessors, (32), 12 states have return successors, (31), 18 states have call predecessors, (31), 21 states have call successors, (31) [2022-11-20 12:09:50,051 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 160 transitions. [2022-11-20 12:09:50,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-20 12:09:50,052 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:09:50,052 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1] [2022-11-20 12:09:50,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 12:09:50,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ff7738-2463-47db-b5a4-ec9253801225/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:09:50,254 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:09:50,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:09:50,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1010518910, now seen corresponding path program 1 times [2022-11-20 12:09:50,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:09:50,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350348361] [2022-11-20 12:09:50,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:09:50,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:09:50,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:51,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:09:51,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:51,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:09:51,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:51,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 12:09:51,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:51,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 12:09:51,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:51,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-20 12:09:51,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:51,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-20 12:09:51,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:51,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-20 12:09:51,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:51,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-20 12:09:51,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:51,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-20 12:09:51,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:51,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-11-20 12:09:51,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:51,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-11-20 12:09:51,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:51,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-11-20 12:09:51,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:51,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-11-20 12:09:51,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:51,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-11-20 12:09:51,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:51,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:09:51,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:51,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-11-20 12:09:51,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:52,548 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-20 12:09:52,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:09:52,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350348361] [2022-11-20 12:09:52,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350348361] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:09:52,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:09:52,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-11-20 12:09:52,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672248460] [2022-11-20 12:09:52,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:09:52,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 12:09:52,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:09:52,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 12:09:52,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2022-11-20 12:09:52,551 INFO L87 Difference]: Start difference. First operand 158 states and 160 transitions. Second operand has 18 states, 16 states have (on average 4.875) internal successors, (78), 15 states have internal predecessors, (78), 7 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-11-20 12:09:55,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:09:55,484 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2022-11-20 12:09:55,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 12:09:55,485 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 4.875) internal successors, (78), 15 states have internal predecessors, (78), 7 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 137 [2022-11-20 12:09:55,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:09:55,485 INFO L225 Difference]: With dead ends: 158 [2022-11-20 12:09:55,485 INFO L226 Difference]: Without dead ends: 0 [2022-11-20 12:09:55,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2022-11-20 12:09:55,486 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 72 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 1001 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 1031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-20 12:09:55,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 577 Invalid, 1031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1001 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-20 12:09:55,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-20 12:09:55,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-20 12:09:55,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:09:55,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-20 12:09:55,487 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 137 [2022-11-20 12:09:55,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:09:55,487 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-20 12:09:55,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 4.875) internal successors, (78), 15 states have internal predecessors, (78), 7 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-11-20 12:09:55,487 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-20 12:09:55,487 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-20 12:09:55,490 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-20 12:09:55,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-11-20 12:09:55,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.