./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_right_trim_pred_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_right_trim_pred_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash f85fffa00ce152c2185c303de3856b218143afacade5a3da3d11c284e86ce457 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 18:41:12,003 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 18:41:12,005 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 18:41:12,037 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 18:41:12,038 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 18:41:12,039 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 18:41:12,041 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 18:41:12,043 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 18:41:12,045 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 18:41:12,046 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 18:41:12,047 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 18:41:12,049 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 18:41:12,049 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 18:41:12,050 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 18:41:12,052 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 18:41:12,053 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 18:41:12,054 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 18:41:12,055 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 18:41:12,057 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 18:41:12,060 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 18:41:12,062 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 18:41:12,063 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 18:41:12,064 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 18:41:12,065 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 18:41:12,068 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 18:41:12,068 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 18:41:12,069 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 18:41:12,070 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 18:41:12,070 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 18:41:12,071 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 18:41:12,071 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 18:41:12,072 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 18:41:12,073 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 18:41:12,074 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 18:41:12,075 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 18:41:12,075 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 18:41:12,076 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 18:41:12,076 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 18:41:12,076 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 18:41:12,077 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 18:41:12,077 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 18:41:12,078 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-06 18:41:12,101 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 18:41:12,101 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 18:41:12,101 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 18:41:12,101 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 18:41:12,102 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 18:41:12,102 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 18:41:12,103 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 18:41:12,103 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 18:41:12,103 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 18:41:12,103 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 18:41:12,104 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 18:41:12,104 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 18:41:12,104 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 18:41:12,104 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 18:41:12,104 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 18:41:12,104 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 18:41:12,105 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 18:41:12,105 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 18:41:12,105 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 18:41:12,105 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 18:41:12,105 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 18:41:12,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:41:12,106 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 18:41:12,106 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 18:41:12,106 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 18:41:12,106 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 18:41:12,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 18:41:12,107 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 18:41:12,107 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 18:41:12,107 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 18:41:12,107 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 18:41:12,107 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_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f85fffa00ce152c2185c303de3856b218143afacade5a3da3d11c284e86ce457 [2021-12-06 18:41:12,292 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 18:41:12,308 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 18:41:12,309 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 18:41:12,310 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 18:41:12,311 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 18:41:12,312 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_right_trim_pred_harness.i [2021-12-06 18:41:12,357 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/data/875caa166/b75365ae01914b9e94fd73866cb54aa8/FLAGb9c0103e2 [2021-12-06 18:41:12,905 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 18:41:12,906 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/sv-benchmarks/c/aws-c-common/aws_byte_cursor_right_trim_pred_harness.i [2021-12-06 18:41:12,928 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/data/875caa166/b75365ae01914b9e94fd73866cb54aa8/FLAGb9c0103e2 [2021-12-06 18:41:13,358 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/data/875caa166/b75365ae01914b9e94fd73866cb54aa8 [2021-12-06 18:41:13,363 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 18:41:13,365 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 18:41:13,367 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 18:41:13,367 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 18:41:13,371 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 18:41:13,372 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:41:13" (1/1) ... [2021-12-06 18:41:13,373 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d89e58c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:41:13, skipping insertion in model container [2021-12-06 18:41:13,373 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:41:13" (1/1) ... [2021-12-06 18:41:13,380 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 18:41:13,462 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 18:41:13,660 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/sv-benchmarks/c/aws-c-common/aws_byte_cursor_right_trim_pred_harness.i[4505,4518] [2021-12-06 18:41:13,665 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/sv-benchmarks/c/aws-c-common/aws_byte_cursor_right_trim_pred_harness.i[4565,4578] [2021-12-06 18:41:14,332 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:41:14,332 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:41:14,333 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:41:14,333 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:41:14,334 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:41:14,344 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:41:14,344 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:41:14,346 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:41:14,346 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:41:14,649 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-06 18:41:14,650 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-06 18:41:14,651 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-06 18:41:14,652 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-06 18:41:14,653 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-06 18:41:14,653 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-06 18:41:14,654 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-06 18:41:14,654 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-06 18:41:14,655 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-06 18:41:14,655 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-06 18:41:14,806 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-06 18:41:14,883 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:41:14,884 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:41:14,931 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:41:14,968 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 18:41:14,978 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/sv-benchmarks/c/aws-c-common/aws_byte_cursor_right_trim_pred_harness.i[4505,4518] [2021-12-06 18:41:14,979 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/sv-benchmarks/c/aws-c-common/aws_byte_cursor_right_trim_pred_harness.i[4565,4578] [2021-12-06 18:41:15,002 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:41:15,003 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:41:15,003 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:41:15,003 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:41:15,004 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:41:15,008 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:41:15,008 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:41:15,009 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:41:15,009 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:41:15,029 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-06 18:41:15,030 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-06 18:41:15,030 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-06 18:41:15,031 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-06 18:41:15,032 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-06 18:41:15,032 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-06 18:41:15,032 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-06 18:41:15,032 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-06 18:41:15,033 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-06 18:41:15,033 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-06 18:41:15,057 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-06 18:41:15,092 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:41:15,092 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 18:41:15,110 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:41:15,253 INFO L208 MainTranslator]: Completed translation [2021-12-06 18:41:15,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:41:15 WrapperNode [2021-12-06 18:41:15,254 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 18:41:15,254 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 18:41:15,255 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 18:41:15,255 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 18:41:15,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:41:15" (1/1) ... [2021-12-06 18:41:15,330 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:41:15" (1/1) ... [2021-12-06 18:41:15,391 INFO L137 Inliner]: procedures = 690, calls = 2620, calls flagged for inlining = 60, calls inlined = 8, statements flattened = 800 [2021-12-06 18:41:15,391 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 18:41:15,392 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 18:41:15,392 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 18:41:15,392 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 18:41:15,400 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:41:15" (1/1) ... [2021-12-06 18:41:15,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:41:15" (1/1) ... [2021-12-06 18:41:15,408 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:41:15" (1/1) ... [2021-12-06 18:41:15,408 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:41:15" (1/1) ... [2021-12-06 18:41:15,437 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:41:15" (1/1) ... [2021-12-06 18:41:15,441 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:41:15" (1/1) ... [2021-12-06 18:41:15,446 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:41:15" (1/1) ... [2021-12-06 18:41:15,455 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 18:41:15,456 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 18:41:15,456 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 18:41:15,456 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 18:41:15,456 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:41:15" (1/1) ... [2021-12-06 18:41:15,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:41:15,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:41:15,483 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 18:41:15,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 18:41:15,526 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2021-12-06 18:41:15,526 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2021-12-06 18:41:15,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 18:41:15,526 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-06 18:41:15,526 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-06 18:41:15,526 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 18:41:15,527 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-06 18:41:15,527 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-06 18:41:15,527 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 18:41:15,527 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 18:41:15,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-06 18:41:15,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 18:41:15,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 18:41:15,527 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-06 18:41:15,528 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-06 18:41:15,528 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-12-06 18:41:15,528 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-12-06 18:41:15,528 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-06 18:41:15,528 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-06 18:41:15,528 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 18:41:15,528 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-06 18:41:15,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-06 18:41:15,529 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~~uint8_t~0~TO~int [2021-12-06 18:41:15,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~~uint8_t~0~TO~int [2021-12-06 18:41:15,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 18:41:15,529 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_right_trim_pred [2021-12-06 18:41:15,529 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_right_trim_pred [2021-12-06 18:41:15,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 18:41:15,713 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 18:41:15,715 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 18:41:16,605 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 18:41:16,612 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 18:41:16,612 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-06 18:41:16,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:41:16 BoogieIcfgContainer [2021-12-06 18:41:16,614 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 18:41:16,616 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 18:41:16,616 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 18:41:16,619 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 18:41:16,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 06:41:13" (1/3) ... [2021-12-06 18:41:16,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13c12972 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:41:16, skipping insertion in model container [2021-12-06 18:41:16,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:41:15" (2/3) ... [2021-12-06 18:41:16,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13c12972 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:41:16, skipping insertion in model container [2021-12-06 18:41:16,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:41:16" (3/3) ... [2021-12-06 18:41:16,622 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_cursor_right_trim_pred_harness.i [2021-12-06 18:41:16,628 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 18:41:16,628 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 18:41:16,677 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 18:41:16,683 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 18:41:16,684 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 18:41:16,702 INFO L276 IsEmpty]: Start isEmpty. Operand has 95 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 64 states have internal predecessors, (78), 22 states have call successors, (22), 8 states have call predecessors, (22), 8 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-06 18:41:16,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-06 18:41:16,708 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:16,709 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:16,709 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:41:16,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:16,713 INFO L85 PathProgramCache]: Analyzing trace with hash 990555707, now seen corresponding path program 1 times [2021-12-06 18:41:16,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:41:16,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129560319] [2021-12-06 18:41:16,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:16,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:41:16,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:17,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:41:17,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:17,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:41:17,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:17,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 18:41:17,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:17,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 18:41:17,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:17,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:41:17,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:17,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 18:41:17,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:17,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 18:41:17,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:17,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 18:41:17,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:17,176 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-06 18:41:17,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:41:17,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129560319] [2021-12-06 18:41:17,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129560319] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:41:17,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:41:17,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 18:41:17,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047456902] [2021-12-06 18:41:17,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:41:17,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 18:41:17,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:41:17,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 18:41:17,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 18:41:17,206 INFO L87 Difference]: Start difference. First operand has 95 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 64 states have internal predecessors, (78), 22 states have call successors, (22), 8 states have call predecessors, (22), 8 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 18:41:17,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:17,231 INFO L93 Difference]: Finished difference Result 186 states and 253 transitions. [2021-12-06 18:41:17,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 18:41:17,233 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2021-12-06 18:41:17,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:17,243 INFO L225 Difference]: With dead ends: 186 [2021-12-06 18:41:17,243 INFO L226 Difference]: Without dead ends: 86 [2021-12-06 18:41:17,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 18:41:17,252 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:17,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:41:17,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-06 18:41:17,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-12-06 18:41:17,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 57 states have internal predecessors, (66), 22 states have call successors, (22), 8 states have call predecessors, (22), 7 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-06 18:41:17,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 108 transitions. [2021-12-06 18:41:17,292 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 108 transitions. Word has length 61 [2021-12-06 18:41:17,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:17,292 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 108 transitions. [2021-12-06 18:41:17,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 18:41:17,293 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 108 transitions. [2021-12-06 18:41:17,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-06 18:41:17,296 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:17,296 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:17,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 18:41:17,296 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:41:17,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:17,297 INFO L85 PathProgramCache]: Analyzing trace with hash -89389740, now seen corresponding path program 1 times [2021-12-06 18:41:17,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:41:17,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194094233] [2021-12-06 18:41:17,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:17,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:41:17,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:17,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:41:17,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:17,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:41:17,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:17,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 18:41:17,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:17,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 18:41:17,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:17,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:41:17,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:17,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 18:41:17,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:17,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 18:41:17,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:17,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-06 18:41:17,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:17,555 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-06 18:41:17,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:41:17,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194094233] [2021-12-06 18:41:17,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194094233] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:41:17,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038118447] [2021-12-06 18:41:17,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:17,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:41:17,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:41:17,557 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:41:17,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 18:41:17,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:17,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 2488 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 18:41:17,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:41:18,081 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-06 18:41:18,081 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:41:18,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038118447] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:41:18,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:41:18,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2021-12-06 18:41:18,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129067284] [2021-12-06 18:41:18,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:41:18,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:41:18,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:41:18,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:41:18,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:41:18,084 INFO L87 Difference]: Start difference. First operand 86 states and 108 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 18:41:18,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:18,184 INFO L93 Difference]: Finished difference Result 155 states and 200 transitions. [2021-12-06 18:41:18,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:41:18,184 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 63 [2021-12-06 18:41:18,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:18,187 INFO L225 Difference]: With dead ends: 155 [2021-12-06 18:41:18,188 INFO L226 Difference]: Without dead ends: 89 [2021-12-06 18:41:18,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-12-06 18:41:18,191 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 124 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:18,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 231 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:41:18,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-06 18:41:18,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-12-06 18:41:18,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 60 states have internal predecessors, (68), 22 states have call successors, (22), 8 states have call predecessors, (22), 8 states have return successors, (24), 20 states have call predecessors, (24), 20 states have call successors, (24) [2021-12-06 18:41:18,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 114 transitions. [2021-12-06 18:41:18,208 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 114 transitions. Word has length 63 [2021-12-06 18:41:18,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:18,209 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 114 transitions. [2021-12-06 18:41:18,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 18:41:18,209 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 114 transitions. [2021-12-06 18:41:18,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 18:41:18,211 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:18,211 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:18,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 18:41:18,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:41:18,414 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:41:18,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:18,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1896344881, now seen corresponding path program 1 times [2021-12-06 18:41:18,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:41:18,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100059180] [2021-12-06 18:41:18,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:18,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:41:18,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:18,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:41:18,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:18,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:41:18,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:18,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 18:41:18,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:18,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 18:41:18,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:18,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-06 18:41:18,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:18,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 18:41:18,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:18,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 18:41:18,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:18,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-06 18:41:18,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:18,735 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-06 18:41:18,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:41:18,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100059180] [2021-12-06 18:41:18,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100059180] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:41:18,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855325388] [2021-12-06 18:41:18,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:18,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:41:18,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:41:18,736 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:41:18,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 18:41:19,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:19,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 2493 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 18:41:19,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:41:19,169 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 18:41:19,169 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:41:19,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855325388] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:41:19,169 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:41:19,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2021-12-06 18:41:19,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507695620] [2021-12-06 18:41:19,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:41:19,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 18:41:19,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:41:19,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 18:41:19,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:41:19,171 INFO L87 Difference]: Start difference. First operand 89 states and 114 transitions. Second operand has 8 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-06 18:41:19,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:19,286 INFO L93 Difference]: Finished difference Result 148 states and 189 transitions. [2021-12-06 18:41:19,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 18:41:19,286 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 65 [2021-12-06 18:41:19,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:19,288 INFO L225 Difference]: With dead ends: 148 [2021-12-06 18:41:19,288 INFO L226 Difference]: Without dead ends: 89 [2021-12-06 18:41:19,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-12-06 18:41:19,289 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 135 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:19,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 348 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:41:19,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-06 18:41:19,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-12-06 18:41:19,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 60 states have internal predecessors, (68), 22 states have call successors, (22), 8 states have call predecessors, (22), 8 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2021-12-06 18:41:19,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 112 transitions. [2021-12-06 18:41:19,298 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 112 transitions. Word has length 65 [2021-12-06 18:41:19,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:19,299 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 112 transitions. [2021-12-06 18:41:19,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-06 18:41:19,299 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 112 transitions. [2021-12-06 18:41:19,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-06 18:41:19,300 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:19,300 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:19,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 18:41:19,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:41:19,502 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:41:19,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:19,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1793788399, now seen corresponding path program 1 times [2021-12-06 18:41:19,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:41:19,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451598272] [2021-12-06 18:41:19,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:19,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:41:19,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:19,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:41:19,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:19,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:41:19,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:19,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 18:41:19,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:19,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 18:41:19,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:19,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-06 18:41:19,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:19,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:41:19,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:19,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-06 18:41:19,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:19,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 18:41:19,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:19,810 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-06 18:41:19,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:41:19,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451598272] [2021-12-06 18:41:19,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451598272] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:41:19,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:41:19,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 18:41:19,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69558731] [2021-12-06 18:41:19,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:41:19,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 18:41:19,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:41:19,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 18:41:19,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 18:41:19,812 INFO L87 Difference]: Start difference. First operand 89 states and 112 transitions. Second operand has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-12-06 18:41:19,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:19,859 INFO L93 Difference]: Finished difference Result 101 states and 129 transitions. [2021-12-06 18:41:19,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 18:41:19,859 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 69 [2021-12-06 18:41:19,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:19,861 INFO L225 Difference]: With dead ends: 101 [2021-12-06 18:41:19,861 INFO L226 Difference]: Without dead ends: 99 [2021-12-06 18:41:19,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:41:19,862 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 16 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:19,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 728 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:41:19,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-06 18:41:19,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2021-12-06 18:41:19,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 64 states have (on average 1.15625) internal successors, (74), 67 states have internal predecessors, (74), 23 states have call successors, (23), 9 states have call predecessors, (23), 10 states have return successors, (29), 21 states have call predecessors, (29), 21 states have call successors, (29) [2021-12-06 18:41:19,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 126 transitions. [2021-12-06 18:41:19,872 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 126 transitions. Word has length 69 [2021-12-06 18:41:19,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:19,872 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 126 transitions. [2021-12-06 18:41:19,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-12-06 18:41:19,872 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 126 transitions. [2021-12-06 18:41:19,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-06 18:41:19,874 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:19,874 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:19,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 18:41:19,874 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:41:19,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:19,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1240513463, now seen corresponding path program 1 times [2021-12-06 18:41:19,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:41:19,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193253363] [2021-12-06 18:41:19,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:19,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:41:19,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:20,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:41:20,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:20,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:41:20,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:20,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 18:41:20,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:20,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 18:41:20,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:20,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-06 18:41:20,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:20,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:41:20,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:20,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-06 18:41:20,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:20,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 18:41:20,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:20,323 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 18:41:20,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:41:20,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193253363] [2021-12-06 18:41:20,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193253363] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:41:20,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044339070] [2021-12-06 18:41:20,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:20,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:41:20,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:41:20,325 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:41:20,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 18:41:20,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:20,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 2515 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-06 18:41:20,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:41:21,368 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 18:41:21,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:41:21,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:41:21,633 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-12-06 18:41:21,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2021-12-06 18:41:21,651 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-06 18:41:21,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044339070] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:41:21,651 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:41:21,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 11] total 23 [2021-12-06 18:41:21,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795819377] [2021-12-06 18:41:21,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:41:21,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-06 18:41:21,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:41:21,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-06 18:41:21,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-12-06 18:41:21,653 INFO L87 Difference]: Start difference. First operand 98 states and 126 transitions. Second operand has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 21 states have internal predecessors, (87), 7 states have call successors, (19), 5 states have call predecessors, (19), 5 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2021-12-06 18:41:22,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:22,365 INFO L93 Difference]: Finished difference Result 233 states and 314 transitions. [2021-12-06 18:41:22,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 18:41:22,366 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 21 states have internal predecessors, (87), 7 states have call successors, (19), 5 states have call predecessors, (19), 5 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) Word has length 73 [2021-12-06 18:41:22,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:22,368 INFO L225 Difference]: With dead ends: 233 [2021-12-06 18:41:22,368 INFO L226 Difference]: Without dead ends: 152 [2021-12-06 18:41:22,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 140 SyntacticMatches, 13 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2021-12-06 18:41:22,370 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 121 mSDsluCounter, 693 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 798 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:22,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 798 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 621 Invalid, 0 Unknown, 166 Unchecked, 0.5s Time] [2021-12-06 18:41:22,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-12-06 18:41:22,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 137. [2021-12-06 18:41:22,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 91 states have (on average 1.1538461538461537) internal successors, (105), 93 states have internal predecessors, (105), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (39), 30 states have call predecessors, (39), 31 states have call successors, (39) [2021-12-06 18:41:22,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 177 transitions. [2021-12-06 18:41:22,384 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 177 transitions. Word has length 73 [2021-12-06 18:41:22,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:22,384 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 177 transitions. [2021-12-06 18:41:22,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 21 states have internal predecessors, (87), 7 states have call successors, (19), 5 states have call predecessors, (19), 5 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2021-12-06 18:41:22,385 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 177 transitions. [2021-12-06 18:41:22,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-06 18:41:22,386 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:22,387 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:22,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 18:41:22,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:41:22,588 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:41:22,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:22,590 INFO L85 PathProgramCache]: Analyzing trace with hash 295115559, now seen corresponding path program 1 times [2021-12-06 18:41:22,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:41:22,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804665401] [2021-12-06 18:41:22,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:22,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:41:22,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:22,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:41:22,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:22,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:41:22,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:22,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 18:41:22,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:22,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 18:41:22,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:22,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-06 18:41:22,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:22,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:41:22,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:22,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-06 18:41:22,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:22,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-06 18:41:22,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:22,808 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 18:41:22,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:41:22,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804665401] [2021-12-06 18:41:22,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804665401] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:41:22,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:41:22,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:41:22,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529146318] [2021-12-06 18:41:22,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:41:22,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:41:22,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:41:22,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:41:22,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:41:22,810 INFO L87 Difference]: Start difference. First operand 137 states and 177 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 18:41:22,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:22,822 INFO L93 Difference]: Finished difference Result 199 states and 259 transitions. [2021-12-06 18:41:22,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:41:22,823 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 76 [2021-12-06 18:41:22,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:22,824 INFO L225 Difference]: With dead ends: 199 [2021-12-06 18:41:22,824 INFO L226 Difference]: Without dead ends: 139 [2021-12-06 18:41:22,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:41:22,825 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 0 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:22,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 209 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:41:22,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-12-06 18:41:22,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-12-06 18:41:22,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 93 states have (on average 1.1397849462365592) internal successors, (106), 95 states have internal predecessors, (106), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (39), 30 states have call predecessors, (39), 31 states have call successors, (39) [2021-12-06 18:41:22,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 178 transitions. [2021-12-06 18:41:22,837 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 178 transitions. Word has length 76 [2021-12-06 18:41:22,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:22,837 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 178 transitions. [2021-12-06 18:41:22,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 18:41:22,837 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 178 transitions. [2021-12-06 18:41:22,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-06 18:41:22,838 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:22,839 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:22,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 18:41:22,839 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:41:22,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:22,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1625051706, now seen corresponding path program 1 times [2021-12-06 18:41:22,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:41:22,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924663468] [2021-12-06 18:41:22,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:22,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:41:22,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:22,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:41:22,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:22,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:41:22,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:22,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 18:41:22,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:22,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 18:41:22,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:22,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-06 18:41:22,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:22,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:41:22,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:22,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-06 18:41:22,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:22,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 18:41:22,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:22,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-06 18:41:22,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:22,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-06 18:41:22,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:23,021 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-06 18:41:23,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:41:23,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924663468] [2021-12-06 18:41:23,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924663468] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:41:23,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:41:23,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:41:23,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733891508] [2021-12-06 18:41:23,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:41:23,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:41:23,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:41:23,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:41:23,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:41:23,023 INFO L87 Difference]: Start difference. First operand 139 states and 178 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-06 18:41:23,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:23,053 INFO L93 Difference]: Finished difference Result 181 states and 230 transitions. [2021-12-06 18:41:23,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:41:23,053 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 81 [2021-12-06 18:41:23,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:23,055 INFO L225 Difference]: With dead ends: 181 [2021-12-06 18:41:23,055 INFO L226 Difference]: Without dead ends: 139 [2021-12-06 18:41:23,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:41:23,057 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 18 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:23,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 284 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:41:23,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-12-06 18:41:23,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-12-06 18:41:23,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 93 states have (on average 1.1397849462365592) internal successors, (106), 95 states have internal predecessors, (106), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (38), 30 states have call predecessors, (38), 31 states have call successors, (38) [2021-12-06 18:41:23,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 177 transitions. [2021-12-06 18:41:23,071 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 177 transitions. Word has length 81 [2021-12-06 18:41:23,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:23,071 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 177 transitions. [2021-12-06 18:41:23,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-06 18:41:23,072 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 177 transitions. [2021-12-06 18:41:23,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-06 18:41:23,073 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:23,073 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:23,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 18:41:23,074 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:41:23,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:23,074 INFO L85 PathProgramCache]: Analyzing trace with hash -2069482329, now seen corresponding path program 1 times [2021-12-06 18:41:23,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:41:23,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095135510] [2021-12-06 18:41:23,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:23,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:41:23,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:23,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:41:23,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:23,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:41:23,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:23,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 18:41:23,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:23,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-06 18:41:23,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:23,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 18:41:23,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:23,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-06 18:41:23,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:23,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 18:41:23,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:23,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-06 18:41:23,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:23,319 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-06 18:41:23,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:41:23,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095135510] [2021-12-06 18:41:23,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095135510] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:41:23,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489987037] [2021-12-06 18:41:23,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:23,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:41:23,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:41:23,321 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:41:23,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 18:41:23,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:23,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 2539 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 18:41:23,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:41:23,680 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 18:41:23,681 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:41:23,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489987037] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:41:23,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:41:23,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 10 [2021-12-06 18:41:23,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156194346] [2021-12-06 18:41:23,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:41:23,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 18:41:23,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:41:23,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 18:41:23,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:41:23,682 INFO L87 Difference]: Start difference. First operand 139 states and 177 transitions. Second operand has 9 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-06 18:41:23,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:23,746 INFO L93 Difference]: Finished difference Result 237 states and 308 transitions. [2021-12-06 18:41:23,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 18:41:23,747 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 81 [2021-12-06 18:41:23,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:23,748 INFO L225 Difference]: With dead ends: 237 [2021-12-06 18:41:23,748 INFO L226 Difference]: Without dead ends: 144 [2021-12-06 18:41:23,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:41:23,749 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 12 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:23,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 799 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:41:23,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-12-06 18:41:23,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2021-12-06 18:41:23,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 97 states have (on average 1.134020618556701) internal successors, (110), 100 states have internal predecessors, (110), 33 states have call successors, (33), 13 states have call predecessors, (33), 13 states have return successors, (43), 30 states have call predecessors, (43), 31 states have call successors, (43) [2021-12-06 18:41:23,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 186 transitions. [2021-12-06 18:41:23,768 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 186 transitions. Word has length 81 [2021-12-06 18:41:23,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:23,768 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 186 transitions. [2021-12-06 18:41:23,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-06 18:41:23,769 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 186 transitions. [2021-12-06 18:41:23,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-06 18:41:23,770 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:23,770 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:23,796 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 18:41:23,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-06 18:41:23,972 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:41:23,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:23,974 INFO L85 PathProgramCache]: Analyzing trace with hash -442406659, now seen corresponding path program 1 times [2021-12-06 18:41:23,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:41:23,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935189688] [2021-12-06 18:41:23,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:23,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:41:24,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:24,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:41:24,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:24,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:41:24,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:24,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 18:41:24,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:24,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 18:41:24,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:24,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-06 18:41:24,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:24,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:41:24,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:24,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-06 18:41:24,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:24,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 18:41:24,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:24,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-06 18:41:24,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:24,341 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-06 18:41:24,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:41:24,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935189688] [2021-12-06 18:41:24,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935189688] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:41:24,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616643520] [2021-12-06 18:41:24,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:24,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:41:24,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:41:24,343 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:41:24,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 18:41:24,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:24,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 2566 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-06 18:41:24,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:41:24,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 18:41:25,109 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 18:41:25,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 31 [2021-12-06 18:41:25,143 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 18:41:25,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:41:25,339 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-06 18:41:25,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616643520] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:41:25,339 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:41:25,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 10] total 20 [2021-12-06 18:41:25,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922992727] [2021-12-06 18:41:25,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:41:25,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 18:41:25,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:41:25,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 18:41:25,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-12-06 18:41:25,341 INFO L87 Difference]: Start difference. First operand 144 states and 186 transitions. Second operand has 20 states, 20 states have (on average 4.45) internal successors, (89), 18 states have internal predecessors, (89), 8 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2021-12-06 18:41:26,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:26,024 INFO L93 Difference]: Finished difference Result 250 states and 337 transitions. [2021-12-06 18:41:26,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 18:41:26,024 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.45) internal successors, (89), 18 states have internal predecessors, (89), 8 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) Word has length 82 [2021-12-06 18:41:26,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:26,026 INFO L225 Difference]: With dead ends: 250 [2021-12-06 18:41:26,026 INFO L226 Difference]: Without dead ends: 177 [2021-12-06 18:41:26,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 163 SyntacticMatches, 11 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2021-12-06 18:41:26,027 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 102 mSDsluCounter, 1063 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 1173 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:26,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 1173 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 715 Invalid, 0 Unknown, 166 Unchecked, 0.4s Time] [2021-12-06 18:41:26,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-12-06 18:41:26,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 154. [2021-12-06 18:41:26,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 104 states have (on average 1.0961538461538463) internal successors, (114), 107 states have internal predecessors, (114), 34 states have call successors, (34), 14 states have call predecessors, (34), 15 states have return successors, (47), 32 states have call predecessors, (47), 32 states have call successors, (47) [2021-12-06 18:41:26,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 195 transitions. [2021-12-06 18:41:26,037 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 195 transitions. Word has length 82 [2021-12-06 18:41:26,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:26,037 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 195 transitions. [2021-12-06 18:41:26,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.45) internal successors, (89), 18 states have internal predecessors, (89), 8 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2021-12-06 18:41:26,038 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 195 transitions. [2021-12-06 18:41:26,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-06 18:41:26,038 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:26,039 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:26,061 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 18:41:26,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:41:26,241 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:41:26,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:26,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1702906197, now seen corresponding path program 1 times [2021-12-06 18:41:26,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:41:26,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689560939] [2021-12-06 18:41:26,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:26,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:41:26,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:26,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:41:26,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:26,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:41:26,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:26,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 18:41:26,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:26,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 18:41:26,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:26,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-06 18:41:26,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:26,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:41:26,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:26,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-06 18:41:26,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:26,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 18:41:26,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:26,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-06 18:41:26,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:26,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-06 18:41:26,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:26,445 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-06 18:41:26,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:41:26,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689560939] [2021-12-06 18:41:26,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689560939] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:41:26,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:41:26,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 18:41:26,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533929536] [2021-12-06 18:41:26,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:41:26,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 18:41:26,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:41:26,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 18:41:26,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 18:41:26,447 INFO L87 Difference]: Start difference. First operand 154 states and 195 transitions. Second operand has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-06 18:41:26,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:26,486 INFO L93 Difference]: Finished difference Result 164 states and 206 transitions. [2021-12-06 18:41:26,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 18:41:26,486 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 83 [2021-12-06 18:41:26,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:26,487 INFO L225 Difference]: With dead ends: 164 [2021-12-06 18:41:26,488 INFO L226 Difference]: Without dead ends: 162 [2021-12-06 18:41:26,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:41:26,488 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 16 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:26,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 736 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:41:26,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-12-06 18:41:26,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2021-12-06 18:41:26,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 107 states have (on average 1.0934579439252337) internal successors, (117), 110 states have internal predecessors, (117), 36 states have call successors, (36), 15 states have call predecessors, (36), 16 states have return successors, (49), 34 states have call predecessors, (49), 34 states have call successors, (49) [2021-12-06 18:41:26,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 202 transitions. [2021-12-06 18:41:26,497 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 202 transitions. Word has length 83 [2021-12-06 18:41:26,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:26,498 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 202 transitions. [2021-12-06 18:41:26,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-06 18:41:26,498 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 202 transitions. [2021-12-06 18:41:26,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-06 18:41:26,499 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:26,499 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:26,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 18:41:26,499 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:41:26,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:26,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1271029248, now seen corresponding path program 1 times [2021-12-06 18:41:26,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:41:26,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551300942] [2021-12-06 18:41:26,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:26,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:41:26,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:26,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:41:26,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:26,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:41:26,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:26,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 18:41:26,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:26,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 18:41:26,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:26,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 18:41:26,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:26,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-06 18:41:26,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:26,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-06 18:41:26,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:26,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 18:41:26,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:26,751 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-06 18:41:26,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:41:26,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551300942] [2021-12-06 18:41:26,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551300942] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:41:26,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157164994] [2021-12-06 18:41:26,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:26,752 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:41:26,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:41:26,753 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:41:26,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 18:41:27,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:27,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 2549 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 18:41:27,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:41:27,110 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 18:41:27,110 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:41:27,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157164994] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:41:27,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:41:27,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 10 [2021-12-06 18:41:27,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201952208] [2021-12-06 18:41:27,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:41:27,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 18:41:27,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:41:27,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 18:41:27,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:41:27,112 INFO L87 Difference]: Start difference. First operand 160 states and 202 transitions. Second operand has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-06 18:41:27,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:27,182 INFO L93 Difference]: Finished difference Result 246 states and 313 transitions. [2021-12-06 18:41:27,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 18:41:27,182 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 83 [2021-12-06 18:41:27,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:27,183 INFO L225 Difference]: With dead ends: 246 [2021-12-06 18:41:27,183 INFO L226 Difference]: Without dead ends: 160 [2021-12-06 18:41:27,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:41:27,184 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 12 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:27,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 792 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:41:27,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-12-06 18:41:27,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2021-12-06 18:41:27,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 107 states have (on average 1.0934579439252337) internal successors, (117), 110 states have internal predecessors, (117), 36 states have call successors, (36), 15 states have call predecessors, (36), 16 states have return successors, (48), 34 states have call predecessors, (48), 34 states have call successors, (48) [2021-12-06 18:41:27,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 201 transitions. [2021-12-06 18:41:27,195 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 201 transitions. Word has length 83 [2021-12-06 18:41:27,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:27,195 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 201 transitions. [2021-12-06 18:41:27,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-06 18:41:27,196 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 201 transitions. [2021-12-06 18:41:27,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-06 18:41:27,197 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:27,197 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:27,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-06 18:41:27,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:41:27,399 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:41:27,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:27,400 INFO L85 PathProgramCache]: Analyzing trace with hash 558656115, now seen corresponding path program 1 times [2021-12-06 18:41:27,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:41:27,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747782838] [2021-12-06 18:41:27,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:27,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:41:27,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:27,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:41:27,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:27,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:41:27,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:27,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 18:41:27,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:27,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 18:41:27,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:27,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-06 18:41:27,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:27,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:41:27,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:27,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-06 18:41:27,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:27,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 18:41:27,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:27,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-06 18:41:27,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:27,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-06 18:41:27,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:27,863 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-06 18:41:27,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:41:27,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747782838] [2021-12-06 18:41:27,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747782838] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:41:27,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236351489] [2021-12-06 18:41:27,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:27,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:41:27,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:41:27,865 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:41:27,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 18:41:28,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:28,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 2547 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-06 18:41:28,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:41:28,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 18:41:29,256 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 31 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 18:41:29,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:41:29,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236351489] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:41:29,442 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:41:29,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 24 [2021-12-06 18:41:29,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695550852] [2021-12-06 18:41:29,442 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:41:29,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 18:41:29,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:41:29,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 18:41:29,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-12-06 18:41:29,444 INFO L87 Difference]: Start difference. First operand 160 states and 201 transitions. Second operand has 24 states, 24 states have (on average 3.7083333333333335) internal successors, (89), 22 states have internal predecessors, (89), 10 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (20), 10 states have call predecessors, (20), 9 states have call successors, (20) [2021-12-06 18:41:30,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:30,425 INFO L93 Difference]: Finished difference Result 270 states and 352 transitions. [2021-12-06 18:41:30,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 18:41:30,426 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.7083333333333335) internal successors, (89), 22 states have internal predecessors, (89), 10 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (20), 10 states have call predecessors, (20), 9 states have call successors, (20) Word has length 87 [2021-12-06 18:41:30,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:30,427 INFO L225 Difference]: With dead ends: 270 [2021-12-06 18:41:30,427 INFO L226 Difference]: Without dead ends: 209 [2021-12-06 18:41:30,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 117 SyntacticMatches, 15 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=235, Invalid=1487, Unknown=0, NotChecked=0, Total=1722 [2021-12-06 18:41:30,429 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 138 mSDsluCounter, 1255 mSDsCounter, 0 mSdLazyCounter, 1024 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 1388 SdHoareTripleChecker+Invalid, 1495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 426 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:30,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 1388 Invalid, 1495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1024 Invalid, 0 Unknown, 426 Unchecked, 0.6s Time] [2021-12-06 18:41:30,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-12-06 18:41:30,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 174. [2021-12-06 18:41:30,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 117 states have (on average 1.0854700854700854) internal successors, (127), 120 states have internal predecessors, (127), 38 states have call successors, (38), 17 states have call predecessors, (38), 18 states have return successors, (47), 36 states have call predecessors, (47), 36 states have call successors, (47) [2021-12-06 18:41:30,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 212 transitions. [2021-12-06 18:41:30,441 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 212 transitions. Word has length 87 [2021-12-06 18:41:30,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:30,442 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 212 transitions. [2021-12-06 18:41:30,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.7083333333333335) internal successors, (89), 22 states have internal predecessors, (89), 10 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (20), 10 states have call predecessors, (20), 9 states have call successors, (20) [2021-12-06 18:41:30,442 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 212 transitions. [2021-12-06 18:41:30,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-06 18:41:30,443 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:30,443 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:30,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 18:41:30,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-06 18:41:30,644 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:41:30,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:30,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1900291175, now seen corresponding path program 2 times [2021-12-06 18:41:30,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:41:30,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763100158] [2021-12-06 18:41:30,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:30,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:41:30,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:30,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:41:30,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:30,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:41:30,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:30,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 18:41:30,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:30,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 18:41:30,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:30,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 18:41:30,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:30,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-06 18:41:30,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:30,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-06 18:41:30,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:30,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 18:41:30,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:30,936 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-06 18:41:30,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:41:30,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763100158] [2021-12-06 18:41:30,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763100158] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:41:30,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365000288] [2021-12-06 18:41:30,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:41:30,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:41:30,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:41:30,937 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:41:30,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 18:41:31,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-06 18:41:31,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:41:31,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 2326 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 18:41:31,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:41:31,549 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-06 18:41:31,549 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:41:31,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365000288] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:41:31,549 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:41:31,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 17 [2021-12-06 18:41:31,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420833665] [2021-12-06 18:41:31,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:41:31,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 18:41:31,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:41:31,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 18:41:31,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-12-06 18:41:31,550 INFO L87 Difference]: Start difference. First operand 174 states and 212 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 18:41:31,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:31,661 INFO L93 Difference]: Finished difference Result 254 states and 311 transitions. [2021-12-06 18:41:31,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 18:41:31,661 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 85 [2021-12-06 18:41:31,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:31,662 INFO L225 Difference]: With dead ends: 254 [2021-12-06 18:41:31,662 INFO L226 Difference]: Without dead ends: 191 [2021-12-06 18:41:31,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-12-06 18:41:31,663 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 21 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:31,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 601 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 121 Unchecked, 0.1s Time] [2021-12-06 18:41:31,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-12-06 18:41:31,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2021-12-06 18:41:31,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 132 states have (on average 1.0984848484848484) internal successors, (145), 135 states have internal predecessors, (145), 39 states have call successors, (39), 19 states have call predecessors, (39), 19 states have return successors, (49), 36 states have call predecessors, (49), 37 states have call successors, (49) [2021-12-06 18:41:31,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 233 transitions. [2021-12-06 18:41:31,673 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 233 transitions. Word has length 85 [2021-12-06 18:41:31,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:31,673 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 233 transitions. [2021-12-06 18:41:31,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 18:41:31,674 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 233 transitions. [2021-12-06 18:41:31,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-06 18:41:31,675 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:31,675 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:31,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-06 18:41:31,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-06 18:41:31,878 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:41:31,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:31,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1432579808, now seen corresponding path program 1 times [2021-12-06 18:41:31,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:41:31,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915437148] [2021-12-06 18:41:31,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:31,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:41:31,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:32,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:41:32,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:32,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:41:32,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:32,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 18:41:32,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:32,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 18:41:32,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:32,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 18:41:32,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:32,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-06 18:41:32,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:32,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-06 18:41:32,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:32,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 18:41:32,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:32,137 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 18:41:32,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:41:32,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915437148] [2021-12-06 18:41:32,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915437148] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:41:32,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:41:32,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-06 18:41:32,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327142053] [2021-12-06 18:41:32,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:41:32,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 18:41:32,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:41:32,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 18:41:32,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:41:32,139 INFO L87 Difference]: Start difference. First operand 191 states and 233 transitions. Second operand has 13 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-12-06 18:41:32,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:32,350 INFO L93 Difference]: Finished difference Result 199 states and 241 transitions. [2021-12-06 18:41:32,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 18:41:32,351 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 87 [2021-12-06 18:41:32,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:32,352 INFO L225 Difference]: With dead ends: 199 [2021-12-06 18:41:32,352 INFO L226 Difference]: Without dead ends: 197 [2021-12-06 18:41:32,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-12-06 18:41:32,353 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 38 mSDsluCounter, 1014 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:32,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 1124 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:41:32,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-12-06 18:41:32,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2021-12-06 18:41:32,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 135 states have (on average 1.0962962962962963) internal successors, (148), 138 states have internal predecessors, (148), 40 states have call successors, (40), 20 states have call predecessors, (40), 20 states have return successors, (50), 37 states have call predecessors, (50), 38 states have call successors, (50) [2021-12-06 18:41:32,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 238 transitions. [2021-12-06 18:41:32,362 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 238 transitions. Word has length 87 [2021-12-06 18:41:32,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:32,362 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 238 transitions. [2021-12-06 18:41:32,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-12-06 18:41:32,362 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 238 transitions. [2021-12-06 18:41:32,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-06 18:41:32,363 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:32,363 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:32,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 18:41:32,363 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:41:32,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:32,364 INFO L85 PathProgramCache]: Analyzing trace with hash 904354819, now seen corresponding path program 1 times [2021-12-06 18:41:32,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:41:32,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997774088] [2021-12-06 18:41:32,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:32,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:41:32,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:32,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:41:32,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:32,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:41:32,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:32,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 18:41:32,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:32,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 18:41:32,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:32,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 18:41:32,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:32,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-06 18:41:32,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:32,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-06 18:41:32,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:32,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 18:41:32,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:32,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 18:41:32,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:32,781 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-06 18:41:32,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:41:32,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997774088] [2021-12-06 18:41:32,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997774088] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:41:32,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921164140] [2021-12-06 18:41:32,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:32,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:41:32,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:41:32,782 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:41:32,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 18:41:33,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:33,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 2589 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-06 18:41:33,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:41:35,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-12-06 18:41:35,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 13 [2021-12-06 18:41:35,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:41:35,712 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 18:41:35,712 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:41:35,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921164140] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:41:35,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:41:35,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [11] total 23 [2021-12-06 18:41:35,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827586762] [2021-12-06 18:41:35,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:41:35,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 18:41:35,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:41:35,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 18:41:35,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=416, Unknown=1, NotChecked=0, Total=506 [2021-12-06 18:41:35,713 INFO L87 Difference]: Start difference. First operand 196 states and 238 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 12 states have internal predecessors, (59), 3 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-06 18:41:36,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:36,571 INFO L93 Difference]: Finished difference Result 364 states and 473 transitions. [2021-12-06 18:41:36,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 18:41:36,571 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 12 states have internal predecessors, (59), 3 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 91 [2021-12-06 18:41:36,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:36,573 INFO L225 Difference]: With dead ends: 364 [2021-12-06 18:41:36,573 INFO L226 Difference]: Without dead ends: 245 [2021-12-06 18:41:36,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=196, Invalid=795, Unknown=1, NotChecked=0, Total=992 [2021-12-06 18:41:36,575 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 192 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:36,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 494 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 806 Invalid, 0 Unknown, 123 Unchecked, 0.5s Time] [2021-12-06 18:41:36,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-12-06 18:41:36,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 214. [2021-12-06 18:41:36,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 150 states have (on average 1.1) internal successors, (165), 153 states have internal predecessors, (165), 41 states have call successors, (41), 21 states have call predecessors, (41), 22 states have return successors, (58), 39 states have call predecessors, (58), 39 states have call successors, (58) [2021-12-06 18:41:36,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 264 transitions. [2021-12-06 18:41:36,592 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 264 transitions. Word has length 91 [2021-12-06 18:41:36,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:36,592 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 264 transitions. [2021-12-06 18:41:36,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 12 states have internal predecessors, (59), 3 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-06 18:41:36,593 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 264 transitions. [2021-12-06 18:41:36,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-06 18:41:36,594 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:36,594 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:36,616 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 18:41:36,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 18:41:36,795 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:41:36,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:36,795 INFO L85 PathProgramCache]: Analyzing trace with hash -62995835, now seen corresponding path program 1 times [2021-12-06 18:41:36,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:41:36,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871271352] [2021-12-06 18:41:36,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:36,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:41:36,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:36,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:41:36,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:36,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:41:36,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:36,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 18:41:36,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:36,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 18:41:36,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:36,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 18:41:36,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:36,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-06 18:41:36,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:36,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-06 18:41:36,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:36,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 18:41:36,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:36,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 18:41:36,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:36,914 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-06 18:41:36,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:41:36,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871271352] [2021-12-06 18:41:36,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871271352] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:41:36,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930932171] [2021-12-06 18:41:36,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:36,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:41:36,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:41:36,915 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:41:36,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 18:41:37,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:37,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 2584 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 18:41:37,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:41:37,230 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-06 18:41:37,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:41:37,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930932171] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:41:37,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:41:37,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-12-06 18:41:37,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473693638] [2021-12-06 18:41:37,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:41:37,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:41:37,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:41:37,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:41:37,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:41:37,232 INFO L87 Difference]: Start difference. First operand 214 states and 264 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-06 18:41:37,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:37,251 INFO L93 Difference]: Finished difference Result 343 states and 433 transitions. [2021-12-06 18:41:37,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:41:37,252 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 91 [2021-12-06 18:41:37,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:37,253 INFO L225 Difference]: With dead ends: 343 [2021-12-06 18:41:37,253 INFO L226 Difference]: Without dead ends: 205 [2021-12-06 18:41:37,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:41:37,254 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 6 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:37,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 316 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:41:37,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-12-06 18:41:37,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 202. [2021-12-06 18:41:37,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 140 states have (on average 1.0785714285714285) internal successors, (151), 143 states have internal predecessors, (151), 40 states have call successors, (40), 21 states have call predecessors, (40), 21 states have return successors, (50), 37 states have call predecessors, (50), 38 states have call successors, (50) [2021-12-06 18:41:37,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 241 transitions. [2021-12-06 18:41:37,270 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 241 transitions. Word has length 91 [2021-12-06 18:41:37,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:37,270 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 241 transitions. [2021-12-06 18:41:37,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-06 18:41:37,270 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 241 transitions. [2021-12-06 18:41:37,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-06 18:41:37,272 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:37,272 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:37,293 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 18:41:37,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 18:41:37,473 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:41:37,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:37,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1386307521, now seen corresponding path program 1 times [2021-12-06 18:41:37,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:41:37,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208752968] [2021-12-06 18:41:37,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:37,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:41:37,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:37,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:41:37,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:37,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:41:37,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:37,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 18:41:37,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:37,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 18:41:37,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:37,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:41:37,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:37,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:41:37,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:37,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:41:37,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:37,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:41:37,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:37,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 18:41:37,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:37,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:41:37,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:37,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 18:41:37,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:37,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 18:41:37,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:37,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-06 18:41:37,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:37,694 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-06 18:41:37,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:41:37,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208752968] [2021-12-06 18:41:37,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208752968] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:41:37,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:41:37,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 18:41:37,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113387856] [2021-12-06 18:41:37,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:41:37,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 18:41:37,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:41:37,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 18:41:37,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:41:37,696 INFO L87 Difference]: Start difference. First operand 202 states and 241 transitions. Second operand has 9 states, 8 states have (on average 5.125) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-12-06 18:41:37,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:37,952 INFO L93 Difference]: Finished difference Result 210 states and 249 transitions. [2021-12-06 18:41:37,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 18:41:37,953 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.125) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 100 [2021-12-06 18:41:37,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:37,954 INFO L225 Difference]: With dead ends: 210 [2021-12-06 18:41:37,954 INFO L226 Difference]: Without dead ends: 208 [2021-12-06 18:41:37,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-12-06 18:41:37,955 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 51 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:37,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 526 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:41:37,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-12-06 18:41:37,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2021-12-06 18:41:37,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 143 states have (on average 1.0769230769230769) internal successors, (154), 146 states have internal predecessors, (154), 41 states have call successors, (41), 22 states have call predecessors, (41), 22 states have return successors, (51), 38 states have call predecessors, (51), 39 states have call successors, (51) [2021-12-06 18:41:37,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 246 transitions. [2021-12-06 18:41:37,966 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 246 transitions. Word has length 100 [2021-12-06 18:41:37,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:37,966 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 246 transitions. [2021-12-06 18:41:37,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.125) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-12-06 18:41:37,966 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 246 transitions. [2021-12-06 18:41:37,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-06 18:41:37,967 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:37,967 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:37,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-06 18:41:37,967 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:41:37,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:37,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1718798494, now seen corresponding path program 1 times [2021-12-06 18:41:37,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:41:37,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744370528] [2021-12-06 18:41:37,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:37,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:41:38,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:38,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:41:38,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:38,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:41:38,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:38,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 18:41:38,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:38,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 18:41:38,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:38,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 18:41:38,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:38,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 18:41:38,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:38,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-06 18:41:38,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:38,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 18:41:38,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:38,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 18:41:38,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:38,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-06 18:41:38,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:38,376 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-12-06 18:41:38,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:41:38,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744370528] [2021-12-06 18:41:38,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744370528] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:41:38,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338544619] [2021-12-06 18:41:38,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:38,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:41:38,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:41:38,377 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:41:38,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 18:41:38,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:38,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 2634 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-06 18:41:38,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:41:38,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:41:38,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:41:38,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 7 [2021-12-06 18:41:38,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 7 [2021-12-06 18:41:38,800 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-06 18:41:38,800 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:41:38,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338544619] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:41:38,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:41:38,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 13 [2021-12-06 18:41:38,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688690807] [2021-12-06 18:41:38,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:41:38,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 18:41:38,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:41:38,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 18:41:38,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:41:38,801 INFO L87 Difference]: Start difference. First operand 207 states and 246 transitions. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 4 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-06 18:41:38,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:38,936 INFO L93 Difference]: Finished difference Result 392 states and 476 transitions. [2021-12-06 18:41:38,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 18:41:38,936 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 4 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 98 [2021-12-06 18:41:38,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:38,938 INFO L225 Difference]: With dead ends: 392 [2021-12-06 18:41:38,938 INFO L226 Difference]: Without dead ends: 236 [2021-12-06 18:41:38,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 113 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-12-06 18:41:38,939 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 36 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:38,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 693 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 95 Invalid, 0 Unknown, 23 Unchecked, 0.1s Time] [2021-12-06 18:41:38,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-12-06 18:41:38,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 222. [2021-12-06 18:41:38,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 154 states have (on average 1.0714285714285714) internal successors, (165), 158 states have internal predecessors, (165), 43 states have call successors, (43), 24 states have call predecessors, (43), 24 states have return successors, (53), 39 states have call predecessors, (53), 41 states have call successors, (53) [2021-12-06 18:41:38,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 261 transitions. [2021-12-06 18:41:38,952 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 261 transitions. Word has length 98 [2021-12-06 18:41:38,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:38,952 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 261 transitions. [2021-12-06 18:41:38,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 4 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-06 18:41:38,952 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 261 transitions. [2021-12-06 18:41:38,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-06 18:41:38,953 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:38,953 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:38,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 18:41:39,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 18:41:39,154 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:41:39,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:39,154 INFO L85 PathProgramCache]: Analyzing trace with hash 2111461513, now seen corresponding path program 1 times [2021-12-06 18:41:39,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:41:39,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125880582] [2021-12-06 18:41:39,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:39,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:41:39,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:39,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:41:39,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:39,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:41:39,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:39,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 18:41:39,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:39,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 18:41:39,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:39,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:41:39,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:39,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:41:39,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:39,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:41:39,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:39,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:41:39,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:39,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 18:41:39,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:39,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:41:39,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:39,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 18:41:39,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:39,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 18:41:39,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:39,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-06 18:41:39,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:39,641 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 22 proven. 23 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-06 18:41:39,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:41:39,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125880582] [2021-12-06 18:41:39,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125880582] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:41:39,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031089159] [2021-12-06 18:41:39,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:39,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:41:39,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:41:39,643 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:41:39,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 18:41:39,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:39,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 2600 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-06 18:41:39,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:41:40,332 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 32 proven. 30 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-06 18:41:40,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:41:40,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031089159] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:41:40,531 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:41:40,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-12-06 18:41:40,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876888271] [2021-12-06 18:41:40,531 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:41:40,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 18:41:40,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:41:40,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 18:41:40,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-12-06 18:41:40,532 INFO L87 Difference]: Start difference. First operand 222 states and 261 transitions. Second operand has 24 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 23 states have internal predecessors, (86), 9 states have call successors, (27), 5 states have call predecessors, (27), 7 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2021-12-06 18:41:41,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:41,570 INFO L93 Difference]: Finished difference Result 353 states and 455 transitions. [2021-12-06 18:41:41,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-06 18:41:41,571 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 23 states have internal predecessors, (86), 9 states have call successors, (27), 5 states have call predecessors, (27), 7 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 104 [2021-12-06 18:41:41,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:41,574 INFO L225 Difference]: With dead ends: 353 [2021-12-06 18:41:41,574 INFO L226 Difference]: Without dead ends: 284 [2021-12-06 18:41:41,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 142 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=278, Invalid=1792, Unknown=0, NotChecked=0, Total=2070 [2021-12-06 18:41:41,576 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 153 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 1690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 639 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:41,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 407 Invalid, 1690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 919 Invalid, 0 Unknown, 639 Unchecked, 0.6s Time] [2021-12-06 18:41:41,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-12-06 18:41:41,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 250. [2021-12-06 18:41:41,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 169 states have (on average 1.0769230769230769) internal successors, (182), 174 states have internal predecessors, (182), 54 states have call successors, (54), 25 states have call predecessors, (54), 26 states have return successors, (81), 50 states have call predecessors, (81), 52 states have call successors, (81) [2021-12-06 18:41:41,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 317 transitions. [2021-12-06 18:41:41,594 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 317 transitions. Word has length 104 [2021-12-06 18:41:41,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:41,594 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 317 transitions. [2021-12-06 18:41:41,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 23 states have internal predecessors, (86), 9 states have call successors, (27), 5 states have call predecessors, (27), 7 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2021-12-06 18:41:41,594 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 317 transitions. [2021-12-06 18:41:41,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-06 18:41:41,595 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:41,595 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:41,618 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 18:41:41,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:41:41,796 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:41:41,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:41,796 INFO L85 PathProgramCache]: Analyzing trace with hash -643190832, now seen corresponding path program 1 times [2021-12-06 18:41:41,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:41:41,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754123079] [2021-12-06 18:41:41,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:41,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:41:41,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:41,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:41:41,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:41,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:41:41,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:41,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 18:41:41,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:41,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 18:41:41,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:41,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:41:41,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:41,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:41:41,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:41,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:41:41,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:41,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:41:41,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:41,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 18:41:41,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:41,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:41:41,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:41,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 18:41:41,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:41,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 18:41:41,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:41,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-06 18:41:41,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:42,032 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-06 18:41:42,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:41:42,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754123079] [2021-12-06 18:41:42,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754123079] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:41:42,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:41:42,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-06 18:41:42,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901532196] [2021-12-06 18:41:42,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:41:42,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 18:41:42,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:41:42,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 18:41:42,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-12-06 18:41:42,034 INFO L87 Difference]: Start difference. First operand 250 states and 317 transitions. Second operand has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 11 states have internal predecessors, (47), 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) [2021-12-06 18:41:42,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:42,501 INFO L93 Difference]: Finished difference Result 258 states and 325 transitions. [2021-12-06 18:41:42,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 18:41:42,502 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 11 states have internal predecessors, (47), 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 106 [2021-12-06 18:41:42,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:42,503 INFO L225 Difference]: With dead ends: 258 [2021-12-06 18:41:42,503 INFO L226 Difference]: Without dead ends: 256 [2021-12-06 18:41:42,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2021-12-06 18:41:42,504 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 67 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 827 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:42,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 827 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 18:41:42,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-12-06 18:41:42,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 250. [2021-12-06 18:41:42,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 169 states have (on average 1.0769230769230769) internal successors, (182), 174 states have internal predecessors, (182), 54 states have call successors, (54), 25 states have call predecessors, (54), 26 states have return successors, (81), 50 states have call predecessors, (81), 52 states have call successors, (81) [2021-12-06 18:41:42,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 317 transitions. [2021-12-06 18:41:42,519 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 317 transitions. Word has length 106 [2021-12-06 18:41:42,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:42,520 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 317 transitions. [2021-12-06 18:41:42,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 11 states have internal predecessors, (47), 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) [2021-12-06 18:41:42,520 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 317 transitions. [2021-12-06 18:41:42,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-06 18:41:42,521 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:42,521 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:42,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-06 18:41:42,521 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:41:42,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:42,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1690843138, now seen corresponding path program 1 times [2021-12-06 18:41:42,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:41:42,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264432813] [2021-12-06 18:41:42,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:42,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:41:42,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:42,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:41:42,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:42,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:41:42,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:42,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 18:41:42,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:43,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:41:43,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:43,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:41:43,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:43,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 18:41:43,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:43,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 18:41:43,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:43,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-06 18:41:43,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:43,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-06 18:41:43,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:43,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 18:41:43,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:43,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-06 18:41:43,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:43,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-06 18:41:43,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:43,179 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-06 18:41:43,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:41:43,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264432813] [2021-12-06 18:41:43,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264432813] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:41:43,180 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:41:43,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-06 18:41:43,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478929000] [2021-12-06 18:41:43,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:41:43,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 18:41:43,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:41:43,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 18:41:43,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-12-06 18:41:43,182 INFO L87 Difference]: Start difference. First operand 250 states and 317 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 15 states have internal predecessors, (56), 8 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-06 18:41:43,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:43,969 INFO L93 Difference]: Finished difference Result 371 states and 482 transitions. [2021-12-06 18:41:43,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 18:41:43,970 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 15 states have internal predecessors, (56), 8 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) Word has length 109 [2021-12-06 18:41:43,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:43,972 INFO L225 Difference]: With dead ends: 371 [2021-12-06 18:41:43,972 INFO L226 Difference]: Without dead ends: 293 [2021-12-06 18:41:43,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2021-12-06 18:41:43,973 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 147 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 1347 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 1445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:43,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 622 Invalid, 1445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1347 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 18:41:43,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-12-06 18:41:43,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 256. [2021-12-06 18:41:43,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 172 states have (on average 1.0755813953488371) internal successors, (185), 177 states have internal predecessors, (185), 56 states have call successors, (56), 25 states have call predecessors, (56), 27 states have return successors, (85), 53 states have call predecessors, (85), 54 states have call successors, (85) [2021-12-06 18:41:43,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 326 transitions. [2021-12-06 18:41:43,996 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 326 transitions. Word has length 109 [2021-12-06 18:41:43,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:43,996 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 326 transitions. [2021-12-06 18:41:43,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 15 states have internal predecessors, (56), 8 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-06 18:41:43,997 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 326 transitions. [2021-12-06 18:41:43,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-06 18:41:43,998 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:43,998 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:43,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-06 18:41:43,998 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:41:43,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:43,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1949008576, now seen corresponding path program 1 times [2021-12-06 18:41:43,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:41:43,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109745956] [2021-12-06 18:41:43,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:43,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:41:44,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:44,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:41:44,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:44,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:41:44,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:44,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 18:41:44,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:44,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:41:44,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:44,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:41:44,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:44,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 18:41:44,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:44,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 18:41:44,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:44,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-06 18:41:44,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:44,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-06 18:41:44,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:44,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 18:41:44,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:44,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-06 18:41:44,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:44,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-06 18:41:44,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:44,177 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-12-06 18:41:44,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:41:44,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109745956] [2021-12-06 18:41:44,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109745956] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:41:44,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:41:44,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:41:44,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850187174] [2021-12-06 18:41:44,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:41:44,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:41:44,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:41:44,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:41:44,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:41:44,178 INFO L87 Difference]: Start difference. First operand 256 states and 326 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2021-12-06 18:41:44,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:44,351 INFO L93 Difference]: Finished difference Result 337 states and 437 transitions. [2021-12-06 18:41:44,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:41:44,351 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) Word has length 109 [2021-12-06 18:41:44,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:44,353 INFO L225 Difference]: With dead ends: 337 [2021-12-06 18:41:44,353 INFO L226 Difference]: Without dead ends: 248 [2021-12-06 18:41:44,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:41:44,354 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 44 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:44,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 248 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:41:44,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-12-06 18:41:44,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 248. [2021-12-06 18:41:44,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 166 states have (on average 1.072289156626506) internal successors, (178), 170 states have internal predecessors, (178), 55 states have call successors, (55), 25 states have call predecessors, (55), 26 states have return successors, (75), 52 states have call predecessors, (75), 53 states have call successors, (75) [2021-12-06 18:41:44,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 308 transitions. [2021-12-06 18:41:44,369 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 308 transitions. Word has length 109 [2021-12-06 18:41:44,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:44,369 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 308 transitions. [2021-12-06 18:41:44,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2021-12-06 18:41:44,369 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 308 transitions. [2021-12-06 18:41:44,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-06 18:41:44,370 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:44,370 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:44,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-06 18:41:44,371 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:41:44,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:44,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1466498319, now seen corresponding path program 1 times [2021-12-06 18:41:44,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:41:44,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079596922] [2021-12-06 18:41:44,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:44,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:41:44,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:44,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:41:44,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:44,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:41:44,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:44,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 18:41:44,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:44,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 18:41:44,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:44,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:41:44,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:44,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:41:44,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:44,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:41:44,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:44,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:41:44,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:44,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 18:41:44,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:44,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:41:44,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:44,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 18:41:44,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:44,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 18:41:44,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:44,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-06 18:41:44,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:44,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 18:41:44,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:44,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-06 18:41:44,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:44,533 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-12-06 18:41:44,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:41:44,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079596922] [2021-12-06 18:41:44,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079596922] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:41:44,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:41:44,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 18:41:44,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859544726] [2021-12-06 18:41:44,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:41:44,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:41:44,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:41:44,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:41:44,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:41:44,534 INFO L87 Difference]: Start difference. First operand 248 states and 308 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-06 18:41:44,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:44,682 INFO L93 Difference]: Finished difference Result 261 states and 321 transitions. [2021-12-06 18:41:44,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:41:44,682 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 112 [2021-12-06 18:41:44,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:44,684 INFO L225 Difference]: With dead ends: 261 [2021-12-06 18:41:44,684 INFO L226 Difference]: Without dead ends: 245 [2021-12-06 18:41:44,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-06 18:41:44,685 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 50 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:44,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 230 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:41:44,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-12-06 18:41:44,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2021-12-06 18:41:44,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 164 states have (on average 1.0670731707317074) internal successors, (175), 167 states have internal predecessors, (175), 55 states have call successors, (55), 25 states have call predecessors, (55), 25 states have return successors, (74), 52 states have call predecessors, (74), 53 states have call successors, (74) [2021-12-06 18:41:44,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 304 transitions. [2021-12-06 18:41:44,708 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 304 transitions. Word has length 112 [2021-12-06 18:41:44,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:44,708 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 304 transitions. [2021-12-06 18:41:44,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-06 18:41:44,708 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 304 transitions. [2021-12-06 18:41:44,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-06 18:41:44,709 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:44,709 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:44,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-06 18:41:44,709 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:41:44,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:44,710 INFO L85 PathProgramCache]: Analyzing trace with hash 964794292, now seen corresponding path program 1 times [2021-12-06 18:41:44,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:41:44,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132315235] [2021-12-06 18:41:44,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:44,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:41:44,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:44,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:41:44,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:44,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:41:44,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:44,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 18:41:44,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:44,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 18:41:44,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:44,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:41:44,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:44,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:41:44,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:44,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:41:44,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:44,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:41:44,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:44,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 18:41:44,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:44,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:41:44,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:44,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 18:41:44,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:44,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 18:41:44,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:44,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-06 18:41:44,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:44,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 18:41:44,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:44,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-06 18:41:44,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:44,905 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-12-06 18:41:44,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:41:44,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132315235] [2021-12-06 18:41:44,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132315235] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:41:44,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:41:44,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 18:41:44,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342353137] [2021-12-06 18:41:44,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:41:44,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 18:41:44,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:41:44,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 18:41:44,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:41:44,907 INFO L87 Difference]: Start difference. First operand 245 states and 304 transitions. Second operand has 9 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-12-06 18:41:45,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:45,117 INFO L93 Difference]: Finished difference Result 253 states and 312 transitions. [2021-12-06 18:41:45,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 18:41:45,118 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 114 [2021-12-06 18:41:45,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:45,119 INFO L225 Difference]: With dead ends: 253 [2021-12-06 18:41:45,119 INFO L226 Difference]: Without dead ends: 251 [2021-12-06 18:41:45,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-12-06 18:41:45,120 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 49 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:45,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 515 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:41:45,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-12-06 18:41:45,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 250. [2021-12-06 18:41:45,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 167 states have (on average 1.0658682634730539) internal successors, (178), 170 states have internal predecessors, (178), 56 states have call successors, (56), 26 states have call predecessors, (56), 26 states have return successors, (75), 53 states have call predecessors, (75), 54 states have call successors, (75) [2021-12-06 18:41:45,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 309 transitions. [2021-12-06 18:41:45,135 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 309 transitions. Word has length 114 [2021-12-06 18:41:45,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:45,135 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 309 transitions. [2021-12-06 18:41:45,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-12-06 18:41:45,135 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 309 transitions. [2021-12-06 18:41:45,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-06 18:41:45,136 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:45,136 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:45,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-06 18:41:45,136 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:41:45,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:45,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1411369220, now seen corresponding path program 1 times [2021-12-06 18:41:45,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:41:45,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310052095] [2021-12-06 18:41:45,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:45,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:41:45,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:45,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:41:45,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:45,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:41:45,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:45,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 18:41:45,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:45,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:41:45,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:45,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:41:45,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:45,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 18:41:45,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:45,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 18:41:45,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:45,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-06 18:41:45,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:45,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-06 18:41:45,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:45,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 18:41:45,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:45,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-06 18:41:45,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:45,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 18:41:45,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:45,708 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-06 18:41:45,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:41:45,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310052095] [2021-12-06 18:41:45,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310052095] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:41:45,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710170610] [2021-12-06 18:41:45,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:45,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:41:45,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:41:45,709 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:41:45,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 18:41:45,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:45,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 2692 conjuncts, 89 conjunts are in the unsatisfiable core [2021-12-06 18:41:45,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:41:46,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:41:50,264 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:41:50,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 17 treesize of output 23 [2021-12-06 18:41:50,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 8 treesize of output 4 [2021-12-06 18:41:50,303 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:41:50,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 27 [2021-12-06 18:41:50,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 8 treesize of output 4 [2021-12-06 18:41:56,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:41:56,964 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:41:56,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 34 [2021-12-06 18:41:56,972 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:41:56,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 32 [2021-12-06 18:41:56,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 8 treesize of output 4 [2021-12-06 18:41:57,722 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 46 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 18:41:57,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:41:58,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-06 18:41:58,324 WARN L838 $PredicateComparison]: unable to prove that (forall ((|aws_byte_cursor_right_trim_pred_~#trimmed~0.base| Int) (v_ArrVal_790 (Array Int Int)) (v_ArrVal_792 (Array Int Int))) (let ((.cse0 (+ c_aws_byte_cursor_right_trim_pred_~source.offset 8))) (or (not (= (select (select (store |c_#memory_$Pointer$.base| |aws_byte_cursor_right_trim_pred_~#trimmed~0.base| v_ArrVal_790) c_aws_byte_cursor_right_trim_pred_~source.base) .cse0) 0)) (not (= (select (select (store |c_#memory_$Pointer$.offset| |aws_byte_cursor_right_trim_pred_~#trimmed~0.base| v_ArrVal_792) c_aws_byte_cursor_right_trim_pred_~source.base) .cse0) 0)) (and (= c_aws_byte_cursor_right_trim_pred_~source.base |aws_byte_cursor_right_trim_pred_~#trimmed~0.base|) (= c_aws_byte_cursor_right_trim_pred_~source.offset |c_aws_byte_cursor_right_trim_pred_~#trimmed~0.offset|))))) is different from false [2021-12-06 18:41:58,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710170610] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:41:58,374 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:41:58,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 30] total 48 [2021-12-06 18:41:58,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200721731] [2021-12-06 18:41:58,375 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:41:58,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-06 18:41:58,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:41:58,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-06 18:41:58,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=2923, Unknown=3, NotChecked=110, Total=3306 [2021-12-06 18:41:58,377 INFO L87 Difference]: Start difference. First operand 250 states and 309 transitions. Second operand has 48 states, 47 states have (on average 2.702127659574468) internal successors, (127), 42 states have internal predecessors, (127), 19 states have call successors, (27), 8 states have call predecessors, (27), 8 states have return successors, (24), 17 states have call predecessors, (24), 17 states have call successors, (24) [2021-12-06 18:41:59,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:59,827 INFO L93 Difference]: Finished difference Result 440 states and 549 transitions. [2021-12-06 18:41:59,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-06 18:41:59,827 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 2.702127659574468) internal successors, (127), 42 states have internal predecessors, (127), 19 states have call successors, (27), 8 states have call predecessors, (27), 8 states have return successors, (24), 17 states have call predecessors, (24), 17 states have call successors, (24) Word has length 112 [2021-12-06 18:41:59,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:59,829 INFO L225 Difference]: With dead ends: 440 [2021-12-06 18:41:59,829 INFO L226 Difference]: Without dead ends: 373 [2021-12-06 18:41:59,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 128 SyntacticMatches, 9 SemanticMatches, 86 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2540 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=613, Invalid=6870, Unknown=3, NotChecked=170, Total=7656 [2021-12-06 18:41:59,832 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 200 mSDsluCounter, 1388 mSDsCounter, 0 mSdLazyCounter, 1633 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 1517 SdHoareTripleChecker+Invalid, 2937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1148 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:59,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 1517 Invalid, 2937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1633 Invalid, 0 Unknown, 1148 Unchecked, 0.7s Time] [2021-12-06 18:41:59,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-12-06 18:41:59,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 291. [2021-12-06 18:41:59,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 201 states have (on average 1.0895522388059702) internal successors, (219), 206 states have internal predecessors, (219), 58 states have call successors, (58), 30 states have call predecessors, (58), 31 states have return successors, (78), 54 states have call predecessors, (78), 56 states have call successors, (78) [2021-12-06 18:41:59,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 355 transitions. [2021-12-06 18:41:59,850 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 355 transitions. Word has length 112 [2021-12-06 18:41:59,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:59,850 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 355 transitions. [2021-12-06 18:41:59,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 2.702127659574468) internal successors, (127), 42 states have internal predecessors, (127), 19 states have call successors, (27), 8 states have call predecessors, (27), 8 states have return successors, (24), 17 states have call predecessors, (24), 17 states have call successors, (24) [2021-12-06 18:41:59,851 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 355 transitions. [2021-12-06 18:41:59,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-06 18:41:59,852 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:59,852 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:59,874 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 18:42:00,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:00,053 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:42:00,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:00,054 INFO L85 PathProgramCache]: Analyzing trace with hash 415964924, now seen corresponding path program 1 times [2021-12-06 18:42:00,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:00,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875872669] [2021-12-06 18:42:00,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:00,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:00,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:00,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:42:00,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:00,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:42:00,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:00,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 18:42:00,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:00,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 18:42:00,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:00,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:42:00,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:00,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:42:00,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:00,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:42:00,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:00,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:42:00,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:00,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 18:42:00,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:00,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:42:00,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:00,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 18:42:00,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:00,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 18:42:00,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:00,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-06 18:42:00,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:00,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 18:42:00,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:00,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-06 18:42:00,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:00,421 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 30 proven. 29 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-12-06 18:42:00,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:00,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875872669] [2021-12-06 18:42:00,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875872669] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:42:00,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486043342] [2021-12-06 18:42:00,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:00,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:00,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:42:00,423 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:42:00,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 18:42:01,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:01,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 2632 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-06 18:42:01,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:42:02,118 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 70 proven. 36 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-06 18:42:02,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:42:03,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486043342] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:42:03,784 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:42:03,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 30 [2021-12-06 18:42:03,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951758554] [2021-12-06 18:42:03,785 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:42:03,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-06 18:42:03,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:03,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-06 18:42:03,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1008, Unknown=1, NotChecked=0, Total=1122 [2021-12-06 18:42:03,786 INFO L87 Difference]: Start difference. First operand 291 states and 355 transitions. Second operand has 30 states, 29 states have (on average 3.3448275862068964) internal successors, (97), 26 states have internal predecessors, (97), 11 states have call successors, (31), 5 states have call predecessors, (31), 7 states have return successors, (30), 12 states have call predecessors, (30), 10 states have call successors, (30) [2021-12-06 18:42:05,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:05,252 INFO L93 Difference]: Finished difference Result 447 states and 555 transitions. [2021-12-06 18:42:05,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-06 18:42:05,253 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 3.3448275862068964) internal successors, (97), 26 states have internal predecessors, (97), 11 states have call successors, (31), 5 states have call predecessors, (31), 7 states have return successors, (30), 12 states have call predecessors, (30), 10 states have call successors, (30) Word has length 118 [2021-12-06 18:42:05,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:05,254 INFO L225 Difference]: With dead ends: 447 [2021-12-06 18:42:05,254 INFO L226 Difference]: Without dead ends: 364 [2021-12-06 18:42:05,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 151 SyntacticMatches, 13 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=280, Invalid=2581, Unknown=1, NotChecked=0, Total=2862 [2021-12-06 18:42:05,256 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 174 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 1852 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 2693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 715 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:05,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 791 Invalid, 2693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1852 Invalid, 0 Unknown, 715 Unchecked, 0.9s Time] [2021-12-06 18:42:05,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-12-06 18:42:05,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 316. [2021-12-06 18:42:05,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 218 states have (on average 1.0871559633027523) internal successors, (237), 225 states have internal predecessors, (237), 63 states have call successors, (63), 31 states have call predecessors, (63), 34 states have return successors, (85), 59 states have call predecessors, (85), 61 states have call successors, (85) [2021-12-06 18:42:05,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 385 transitions. [2021-12-06 18:42:05,275 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 385 transitions. Word has length 118 [2021-12-06 18:42:05,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:05,275 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 385 transitions. [2021-12-06 18:42:05,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 3.3448275862068964) internal successors, (97), 26 states have internal predecessors, (97), 11 states have call successors, (31), 5 states have call predecessors, (31), 7 states have return successors, (30), 12 states have call predecessors, (30), 10 states have call successors, (30) [2021-12-06 18:42:05,276 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 385 transitions. [2021-12-06 18:42:05,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-06 18:42:05,277 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:05,277 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-06 18:42:05,300 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 18:42:05,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-06 18:42:05,477 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:42:05,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:05,478 INFO L85 PathProgramCache]: Analyzing trace with hash 874799398, now seen corresponding path program 1 times [2021-12-06 18:42:05,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:05,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072704455] [2021-12-06 18:42:05,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:05,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:05,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:05,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:42:05,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:05,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:42:05,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:05,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 18:42:05,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:06,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:42:06,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:06,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:42:06,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:06,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 18:42:06,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:06,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 18:42:06,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:06,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-06 18:42:06,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:06,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-06 18:42:06,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:06,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 18:42:06,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:06,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-06 18:42:06,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:06,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-06 18:42:06,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:06,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-06 18:42:06,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:06,189 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 29 proven. 11 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-06 18:42:06,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:06,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072704455] [2021-12-06 18:42:06,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072704455] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:42:06,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234295017] [2021-12-06 18:42:06,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:06,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:06,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:42:06,190 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:42:06,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 18:42:06,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:06,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 2722 conjuncts, 74 conjunts are in the unsatisfiable core [2021-12-06 18:42:06,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:42:06,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:42:06,588 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 18:42:06,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 18:42:06,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 18:42:06,926 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-12-06 18:42:06,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2021-12-06 18:42:06,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:42:11,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:42:27,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:42:27,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:42:27,430 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-12-06 18:42:27,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2021-12-06 18:42:35,757 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 30 proven. 57 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-06 18:42:35,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:42:37,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234295017] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:42:37,030 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:42:37,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 35 [2021-12-06 18:42:37,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722871450] [2021-12-06 18:42:37,031 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:42:37,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-06 18:42:37,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:37,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-06 18:42:37,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1477, Unknown=3, NotChecked=0, Total=1640 [2021-12-06 18:42:37,032 INFO L87 Difference]: Start difference. First operand 316 states and 385 transitions. Second operand has 35 states, 34 states have (on average 3.7058823529411766) internal successors, (126), 31 states have internal predecessors, (126), 12 states have call successors, (27), 8 states have call predecessors, (27), 9 states have return successors, (25), 13 states have call predecessors, (25), 10 states have call successors, (25) [2021-12-06 18:42:41,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:41,084 INFO L93 Difference]: Finished difference Result 465 states and 568 transitions. [2021-12-06 18:42:41,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-06 18:42:41,084 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 3.7058823529411766) internal successors, (126), 31 states have internal predecessors, (126), 12 states have call successors, (27), 8 states have call predecessors, (27), 9 states have return successors, (25), 13 states have call predecessors, (25), 10 states have call successors, (25) Word has length 118 [2021-12-06 18:42:41,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:41,087 INFO L225 Difference]: With dead ends: 465 [2021-12-06 18:42:41,087 INFO L226 Difference]: Without dead ends: 398 [2021-12-06 18:42:41,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 138 SyntacticMatches, 20 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1586 ImplicationChecksByTransitivity, 33.9s TimeCoverageRelationStatistics Valid=384, Invalid=4168, Unknown=4, NotChecked=0, Total=4556 [2021-12-06 18:42:41,090 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 130 mSDsluCounter, 786 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 900 SdHoareTripleChecker+Invalid, 1263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 353 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:41,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 900 Invalid, 1263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 810 Invalid, 0 Unknown, 353 Unchecked, 0.4s Time] [2021-12-06 18:42:41,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-12-06 18:42:41,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 343. [2021-12-06 18:42:41,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 240 states have (on average 1.0875) internal successors, (261), 248 states have internal predecessors, (261), 65 states have call successors, (65), 35 states have call predecessors, (65), 37 states have return successors, (89), 59 states have call predecessors, (89), 63 states have call successors, (89) [2021-12-06 18:42:41,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 415 transitions. [2021-12-06 18:42:41,118 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 415 transitions. Word has length 118 [2021-12-06 18:42:41,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:41,118 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 415 transitions. [2021-12-06 18:42:41,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 3.7058823529411766) internal successors, (126), 31 states have internal predecessors, (126), 12 states have call successors, (27), 8 states have call predecessors, (27), 9 states have return successors, (25), 13 states have call predecessors, (25), 10 states have call successors, (25) [2021-12-06 18:42:41,118 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 415 transitions. [2021-12-06 18:42:41,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-06 18:42:41,119 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:41,119 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:42:41,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 18:42:41,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-06 18:42:41,321 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:42:41,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:41,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1588558461, now seen corresponding path program 1 times [2021-12-06 18:42:41,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:41,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031008461] [2021-12-06 18:42:41,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:41,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:41,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:41,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:42:41,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:41,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:42:41,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:41,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 18:42:41,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:41,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 18:42:41,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:41,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:42:41,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:41,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:42:41,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:41,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:42:41,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:41,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:42:41,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:41,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 18:42:41,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:41,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:42:41,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:41,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 18:42:41,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:41,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 18:42:41,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:41,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-06 18:42:41,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:41,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 18:42:41,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:41,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-06 18:42:41,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:41,601 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-12-06 18:42:41,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:41,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031008461] [2021-12-06 18:42:41,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031008461] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:42:41,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:42:41,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-06 18:42:41,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388758365] [2021-12-06 18:42:41,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:42:41,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 18:42:41,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:41,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 18:42:41,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-12-06 18:42:41,602 INFO L87 Difference]: Start difference. First operand 343 states and 415 transitions. Second operand has 14 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 11 states have internal predecessors, (48), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-12-06 18:42:42,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:42,083 INFO L93 Difference]: Finished difference Result 351 states and 423 transitions. [2021-12-06 18:42:42,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 18:42:42,083 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 11 states have internal predecessors, (48), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 120 [2021-12-06 18:42:42,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:42,085 INFO L225 Difference]: With dead ends: 351 [2021-12-06 18:42:42,085 INFO L226 Difference]: Without dead ends: 349 [2021-12-06 18:42:42,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2021-12-06 18:42:42,086 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 74 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:42,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 774 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 18:42:42,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-12-06 18:42:42,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 343. [2021-12-06 18:42:42,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 240 states have (on average 1.0875) internal successors, (261), 248 states have internal predecessors, (261), 65 states have call successors, (65), 35 states have call predecessors, (65), 37 states have return successors, (89), 59 states have call predecessors, (89), 63 states have call successors, (89) [2021-12-06 18:42:42,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 415 transitions. [2021-12-06 18:42:42,106 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 415 transitions. Word has length 120 [2021-12-06 18:42:42,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:42,106 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 415 transitions. [2021-12-06 18:42:42,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 11 states have internal predecessors, (48), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-12-06 18:42:42,106 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 415 transitions. [2021-12-06 18:42:42,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-06 18:42:42,107 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:42,107 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:42:42,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-06 18:42:42,107 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:42:42,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:42,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1324049691, now seen corresponding path program 1 times [2021-12-06 18:42:42,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:42,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693291286] [2021-12-06 18:42:42,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:42,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:42,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:42,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:42:42,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:42,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:42:42,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:42,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 18:42:42,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:42,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 18:42:42,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:42,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:42:42,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:42,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:42:42,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:42,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:42:42,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:42,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:42:42,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:42,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 18:42:42,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:42,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:42:42,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:42,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 18:42:42,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:42,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 18:42:42,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:42,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-06 18:42:42,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:42,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 18:42:42,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:42,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-06 18:42:42,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:42,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-06 18:42:42,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:42,496 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-06 18:42:42,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:42,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693291286] [2021-12-06 18:42:42,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693291286] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:42:42,497 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:42:42,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-06 18:42:42,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735459710] [2021-12-06 18:42:42,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:42:42,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 18:42:42,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:42,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 18:42:42,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-12-06 18:42:42,498 INFO L87 Difference]: Start difference. First operand 343 states and 415 transitions. Second operand has 14 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 7 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2021-12-06 18:42:43,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:43,179 INFO L93 Difference]: Finished difference Result 374 states and 459 transitions. [2021-12-06 18:42:43,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 18:42:43,180 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 7 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 124 [2021-12-06 18:42:43,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:43,181 INFO L225 Difference]: With dead ends: 374 [2021-12-06 18:42:43,181 INFO L226 Difference]: Without dead ends: 263 [2021-12-06 18:42:43,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-12-06 18:42:43,182 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 70 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:43,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 406 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 18:42:43,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-12-06 18:42:43,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 258. [2021-12-06 18:42:43,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 174 states have (on average 1.0977011494252873) internal successors, (191), 179 states have internal predecessors, (191), 57 states have call successors, (57), 25 states have call predecessors, (57), 26 states have return successors, (79), 53 states have call predecessors, (79), 54 states have call successors, (79) [2021-12-06 18:42:43,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 327 transitions. [2021-12-06 18:42:43,198 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 327 transitions. Word has length 124 [2021-12-06 18:42:43,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:43,198 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 327 transitions. [2021-12-06 18:42:43,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 7 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2021-12-06 18:42:43,198 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 327 transitions. [2021-12-06 18:42:43,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-06 18:42:43,199 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:43,199 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:42:43,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-06 18:42:43,199 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:42:43,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:43,199 INFO L85 PathProgramCache]: Analyzing trace with hash 163201154, now seen corresponding path program 2 times [2021-12-06 18:42:43,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:43,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905844371] [2021-12-06 18:42:43,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:43,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:43,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:43,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:42:43,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:43,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:42:43,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:43,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 18:42:43,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:43,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:42:43,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:43,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:42:43,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:43,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 18:42:43,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:43,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 18:42:43,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:43,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-06 18:42:43,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:43,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-06 18:42:43,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:43,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 18:42:43,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:43,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-06 18:42:43,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:43,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-06 18:42:43,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:43,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-06 18:42:43,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:43,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-06 18:42:43,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:44,043 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-12-06 18:42:44,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:44,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905844371] [2021-12-06 18:42:44,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905844371] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:42:44,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791735778] [2021-12-06 18:42:44,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:42:44,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:44,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:42:44,045 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:42:44,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 18:42:44,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:42:44,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:42:44,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 2773 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-06 18:42:44,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:42:44,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:42:44,790 INFO L354 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2021-12-06 18:42:44,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2021-12-06 18:42:44,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2021-12-06 18:42:45,101 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:42:45,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-06 18:42:45,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:42:50,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:43:16,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:43:16,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:43:16,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:16,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:16,288 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-12-06 18:43:16,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 44 [2021-12-06 18:43:24,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:43:24,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:24,534 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-12-06 18:43:24,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 42 [2021-12-06 18:43:39,575 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 30 proven. 62 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 18:43:39,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:43:40,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791735778] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:43:40,979 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:43:40,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 34 [2021-12-06 18:43:40,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804607122] [2021-12-06 18:43:40,979 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:43:40,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-06 18:43:40,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:43:40,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-06 18:43:40,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1400, Unknown=2, NotChecked=0, Total=1560 [2021-12-06 18:43:40,980 INFO L87 Difference]: Start difference. First operand 258 states and 327 transitions. Second operand has 34 states, 34 states have (on average 3.823529411764706) internal successors, (130), 29 states have internal predecessors, (130), 14 states have call successors, (28), 9 states have call predecessors, (28), 7 states have return successors, (25), 15 states have call predecessors, (25), 12 states have call successors, (25) [2021-12-06 18:43:41,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:43:41,689 INFO L93 Difference]: Finished difference Result 349 states and 430 transitions. [2021-12-06 18:43:41,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-06 18:43:41,690 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.823529411764706) internal successors, (130), 29 states have internal predecessors, (130), 14 states have call successors, (28), 9 states have call predecessors, (28), 7 states have return successors, (25), 15 states have call predecessors, (25), 12 states have call successors, (25) Word has length 127 [2021-12-06 18:43:41,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:43:41,691 INFO L225 Difference]: With dead ends: 349 [2021-12-06 18:43:41,691 INFO L226 Difference]: Without dead ends: 276 [2021-12-06 18:43:41,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 149 SyntacticMatches, 24 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1266 ImplicationChecksByTransitivity, 56.1s TimeCoverageRelationStatistics Valid=334, Invalid=2970, Unknown=2, NotChecked=0, Total=3306 [2021-12-06 18:43:41,693 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 110 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 424 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:43:41,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 646 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 620 Invalid, 0 Unknown, 424 Unchecked, 0.3s Time] [2021-12-06 18:43:41,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-12-06 18:43:41,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 273. [2021-12-06 18:43:41,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 189 states have (on average 1.1005291005291005) internal successors, (208), 195 states have internal predecessors, (208), 55 states have call successors, (55), 26 states have call predecessors, (55), 28 states have return successors, (75), 51 states have call predecessors, (75), 52 states have call successors, (75) [2021-12-06 18:43:41,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 338 transitions. [2021-12-06 18:43:41,718 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 338 transitions. Word has length 127 [2021-12-06 18:43:41,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:43:41,718 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 338 transitions. [2021-12-06 18:43:41,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.823529411764706) internal successors, (130), 29 states have internal predecessors, (130), 14 states have call successors, (28), 9 states have call predecessors, (28), 7 states have return successors, (25), 15 states have call predecessors, (25), 12 states have call successors, (25) [2021-12-06 18:43:41,718 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 338 transitions. [2021-12-06 18:43:41,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-06 18:43:41,719 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:43:41,719 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:43:41,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-06 18:43:41,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:43:41,920 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:43:41,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:43:41,921 INFO L85 PathProgramCache]: Analyzing trace with hash 73196301, now seen corresponding path program 1 times [2021-12-06 18:43:41,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:43:41,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78591528] [2021-12-06 18:43:41,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:43:41,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:43:42,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:42,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:43:42,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:42,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:43:42,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:42,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 18:43:42,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:42,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:43:42,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:42,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:43:42,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:42,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 18:43:42,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:42,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 18:43:42,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:42,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-06 18:43:42,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:42,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-06 18:43:42,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:42,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 18:43:42,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:42,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-06 18:43:42,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:42,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-06 18:43:42,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:42,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-06 18:43:42,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:42,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-06 18:43:42,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:42,809 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-06 18:43:42,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:43:42,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78591528] [2021-12-06 18:43:42,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78591528] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:43:42,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:43:42,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-06 18:43:42,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195363054] [2021-12-06 18:43:42,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:43:42,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 18:43:42,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:43:42,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 18:43:42,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-12-06 18:43:42,811 INFO L87 Difference]: Start difference. First operand 273 states and 338 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 17 states have internal predecessors, (60), 11 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (14), 10 states have call predecessors, (14), 9 states have call successors, (14) [2021-12-06 18:43:43,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:43:43,492 INFO L93 Difference]: Finished difference Result 344 states and 423 transitions. [2021-12-06 18:43:43,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 18:43:43,492 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 17 states have internal predecessors, (60), 11 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (14), 10 states have call predecessors, (14), 9 states have call successors, (14) Word has length 129 [2021-12-06 18:43:43,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:43:43,494 INFO L225 Difference]: With dead ends: 344 [2021-12-06 18:43:43,494 INFO L226 Difference]: Without dead ends: 272 [2021-12-06 18:43:43,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2021-12-06 18:43:43,495 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 110 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 928 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:43:43,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 245 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 928 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 18:43:43,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-12-06 18:43:43,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 266. [2021-12-06 18:43:43,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 186 states have (on average 1.1021505376344085) internal successors, (205), 192 states have internal predecessors, (205), 52 states have call successors, (52), 26 states have call predecessors, (52), 27 states have return successors, (66), 47 states have call predecessors, (66), 49 states have call successors, (66) [2021-12-06 18:43:43,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 323 transitions. [2021-12-06 18:43:43,518 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 323 transitions. Word has length 129 [2021-12-06 18:43:43,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:43:43,518 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 323 transitions. [2021-12-06 18:43:43,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 17 states have internal predecessors, (60), 11 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (14), 10 states have call predecessors, (14), 9 states have call successors, (14) [2021-12-06 18:43:43,518 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 323 transitions. [2021-12-06 18:43:43,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-06 18:43:43,519 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:43:43,519 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:43:43,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-06 18:43:43,519 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:43:43,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:43:43,520 INFO L85 PathProgramCache]: Analyzing trace with hash 212748628, now seen corresponding path program 1 times [2021-12-06 18:43:43,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:43:43,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318071174] [2021-12-06 18:43:43,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:43:43,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:43:43,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:43,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:43:43,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:43,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:43:43,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:43,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 18:43:43,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:43,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:43:43,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:43,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:43:43,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:43,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 18:43:43,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:43,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 18:43:43,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:43,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-06 18:43:43,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:43,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-06 18:43:43,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:43,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 18:43:43,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:43,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-06 18:43:43,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:43,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-06 18:43:43,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:43,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-06 18:43:43,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:43,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-06 18:43:43,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:43,790 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-12-06 18:43:43,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:43:43,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318071174] [2021-12-06 18:43:43,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318071174] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:43:43,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:43:43,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-06 18:43:43,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540845309] [2021-12-06 18:43:43,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:43:43,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 18:43:43,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:43:43,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 18:43:43,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-12-06 18:43:43,792 INFO L87 Difference]: Start difference. First operand 266 states and 323 transitions. Second operand has 14 states, 13 states have (on average 4.538461538461538) internal successors, (59), 11 states have internal predecessors, (59), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2021-12-06 18:43:44,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:43:44,214 INFO L93 Difference]: Finished difference Result 272 states and 328 transitions. [2021-12-06 18:43:44,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 18:43:44,214 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.538461538461538) internal successors, (59), 11 states have internal predecessors, (59), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) Word has length 131 [2021-12-06 18:43:44,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:43:44,215 INFO L225 Difference]: With dead ends: 272 [2021-12-06 18:43:44,215 INFO L226 Difference]: Without dead ends: 270 [2021-12-06 18:43:44,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2021-12-06 18:43:44,216 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 71 mSDsluCounter, 696 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 790 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:43:44,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 790 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 18:43:44,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-12-06 18:43:44,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 270. [2021-12-06 18:43:44,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 189 states have (on average 1.1005291005291005) internal successors, (208), 195 states have internal predecessors, (208), 52 states have call successors, (52), 27 states have call predecessors, (52), 28 states have return successors, (66), 47 states have call predecessors, (66), 49 states have call successors, (66) [2021-12-06 18:43:44,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 326 transitions. [2021-12-06 18:43:44,233 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 326 transitions. Word has length 131 [2021-12-06 18:43:44,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:43:44,233 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 326 transitions. [2021-12-06 18:43:44,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.538461538461538) internal successors, (59), 11 states have internal predecessors, (59), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2021-12-06 18:43:44,233 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 326 transitions. [2021-12-06 18:43:44,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-06 18:43:44,234 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:43:44,234 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:43:44,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-06 18:43:44,235 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:43:44,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:43:44,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1763688684, now seen corresponding path program 1 times [2021-12-06 18:43:44,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:43:44,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520156329] [2021-12-06 18:43:44,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:43:44,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:43:44,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:44,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:43:44,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:44,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:43:44,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:44,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 18:43:44,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:44,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:43:44,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:44,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:43:44,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:44,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 18:43:44,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:44,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 18:43:44,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:44,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 18:43:44,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:44,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:43:44,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:44,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:43:44,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:44,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:43:44,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:44,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 18:43:44,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:44,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:43:44,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:44,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 18:43:44,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:44,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 18:43:44,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:44,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-06 18:43:44,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:44,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-06 18:43:44,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:44,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-06 18:43:44,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:44,543 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-12-06 18:43:44,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:43:44,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520156329] [2021-12-06 18:43:44,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520156329] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:43:44,543 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:43:44,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-06 18:43:44,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873962641] [2021-12-06 18:43:44,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:43:44,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 18:43:44,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:43:44,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 18:43:44,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:43:44,544 INFO L87 Difference]: Start difference. First operand 270 states and 326 transitions. Second operand has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 10 states have internal predecessors, (61), 4 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 3 states have call successors, (18) [2021-12-06 18:43:45,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:43:45,066 INFO L93 Difference]: Finished difference Result 310 states and 379 transitions. [2021-12-06 18:43:45,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 18:43:45,066 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 10 states have internal predecessors, (61), 4 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 3 states have call successors, (18) Word has length 142 [2021-12-06 18:43:45,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:43:45,068 INFO L225 Difference]: With dead ends: 310 [2021-12-06 18:43:45,068 INFO L226 Difference]: Without dead ends: 264 [2021-12-06 18:43:45,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-12-06 18:43:45,069 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 74 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:43:45,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 364 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 18:43:45,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-12-06 18:43:45,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 260. [2021-12-06 18:43:45,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 181 states have (on average 1.0994475138121547) internal successors, (199), 187 states have internal predecessors, (199), 50 states have call successors, (50), 26 states have call predecessors, (50), 28 states have return successors, (66), 46 states have call predecessors, (66), 48 states have call successors, (66) [2021-12-06 18:43:45,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 315 transitions. [2021-12-06 18:43:45,084 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 315 transitions. Word has length 142 [2021-12-06 18:43:45,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:43:45,084 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 315 transitions. [2021-12-06 18:43:45,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 10 states have internal predecessors, (61), 4 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 3 states have call successors, (18) [2021-12-06 18:43:45,084 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 315 transitions. [2021-12-06 18:43:45,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-12-06 18:43:45,085 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:43:45,085 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:43:45,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-06 18:43:45,086 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:43:45,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:43:45,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1844682897, now seen corresponding path program 1 times [2021-12-06 18:43:45,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:43:45,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769141118] [2021-12-06 18:43:45,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:43:45,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:43:45,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:45,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:43:45,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:45,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:43:45,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:45,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 18:43:45,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:45,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:43:45,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:45,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:43:45,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:45,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 18:43:45,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:45,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 18:43:45,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:45,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 18:43:45,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:45,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:43:45,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:45,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:43:45,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:45,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-06 18:43:45,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:45,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-06 18:43:45,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:45,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 18:43:45,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:45,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 18:43:45,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:45,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-06 18:43:45,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:45,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-06 18:43:45,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:45,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-06 18:43:45,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:45,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-06 18:43:45,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:45,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2021-12-06 18:43:45,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:45,415 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-12-06 18:43:45,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:43:45,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769141118] [2021-12-06 18:43:45,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769141118] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:43:45,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375999455] [2021-12-06 18:43:45,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:43:45,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:43:45,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:43:45,416 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:43:45,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 18:43:45,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:45,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 2788 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-06 18:43:45,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:43:45,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:43:45,866 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-06 18:43:45,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:43:46,178 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:43:46,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-06 18:43:46,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 18:43:48,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 18:43:50,699 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 88 proven. 70 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-06 18:43:50,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:43:50,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375999455] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:43:50,898 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:43:50,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 19] total 28 [2021-12-06 18:43:50,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887215666] [2021-12-06 18:43:50,898 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:43:50,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-06 18:43:50,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:43:50,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-06 18:43:50,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=823, Unknown=1, NotChecked=0, Total=930 [2021-12-06 18:43:50,899 INFO L87 Difference]: Start difference. First operand 260 states and 315 transitions. Second operand has 28 states, 27 states have (on average 5.185185185185185) internal successors, (140), 25 states have internal predecessors, (140), 10 states have call successors, (39), 9 states have call predecessors, (39), 11 states have return successors, (38), 9 states have call predecessors, (38), 10 states have call successors, (38) [2021-12-06 18:43:54,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:43:54,173 INFO L93 Difference]: Finished difference Result 386 states and 474 transitions. [2021-12-06 18:43:54,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 18:43:54,174 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 5.185185185185185) internal successors, (140), 25 states have internal predecessors, (140), 10 states have call successors, (39), 9 states have call predecessors, (39), 11 states have return successors, (38), 9 states have call predecessors, (38), 10 states have call successors, (38) Word has length 154 [2021-12-06 18:43:54,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:43:54,175 INFO L225 Difference]: With dead ends: 386 [2021-12-06 18:43:54,176 INFO L226 Difference]: Without dead ends: 309 [2021-12-06 18:43:54,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 202 SyntacticMatches, 8 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=351, Invalid=2403, Unknown=2, NotChecked=0, Total=2756 [2021-12-06 18:43:54,177 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 147 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 1689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 718 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:43:54,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 705 Invalid, 1689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 857 Invalid, 0 Unknown, 718 Unchecked, 0.6s Time] [2021-12-06 18:43:54,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-12-06 18:43:54,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 275. [2021-12-06 18:43:54,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 192 states have (on average 1.09375) internal successors, (210), 196 states have internal predecessors, (210), 52 states have call successors, (52), 28 states have call predecessors, (52), 30 states have return successors, (69), 50 states have call predecessors, (69), 50 states have call successors, (69) [2021-12-06 18:43:54,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 331 transitions. [2021-12-06 18:43:54,194 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 331 transitions. Word has length 154 [2021-12-06 18:43:54,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:43:54,194 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 331 transitions. [2021-12-06 18:43:54,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 5.185185185185185) internal successors, (140), 25 states have internal predecessors, (140), 10 states have call successors, (39), 9 states have call predecessors, (39), 11 states have return successors, (38), 9 states have call predecessors, (38), 10 states have call successors, (38) [2021-12-06 18:43:54,194 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 331 transitions. [2021-12-06 18:43:54,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-06 18:43:54,196 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:43:54,196 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 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, 1] [2021-12-06 18:43:54,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-06 18:43:54,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:43:54,397 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:43:54,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:43:54,398 INFO L85 PathProgramCache]: Analyzing trace with hash -634804810, now seen corresponding path program 1 times [2021-12-06 18:43:54,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:43:54,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108986823] [2021-12-06 18:43:54,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:43:54,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:43:54,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:54,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:43:54,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:54,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:43:54,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:54,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 18:43:54,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:54,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:43:54,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:54,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:43:54,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:54,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 18:43:54,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:54,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 18:43:54,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:54,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 18:43:54,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:54,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:43:54,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:54,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:43:54,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:54,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-06 18:43:54,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:54,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-06 18:43:54,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:54,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 18:43:54,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:54,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 18:43:54,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:54,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-06 18:43:54,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:54,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-06 18:43:54,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:54,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-06 18:43:54,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:54,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-06 18:43:54,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:54,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-06 18:43:54,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:54,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-12-06 18:43:54,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:54,806 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 20 proven. 18 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-12-06 18:43:54,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:43:54,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108986823] [2021-12-06 18:43:54,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108986823] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:43:54,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355335094] [2021-12-06 18:43:54,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:43:54,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:43:54,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:43:54,808 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:43:54,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 18:43:55,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:55,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 2839 conjuncts, 67 conjunts are in the unsatisfiable core [2021-12-06 18:43:55,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:43:55,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:43:55,279 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-06 18:43:55,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:43:55,592 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:43:55,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-06 18:43:55,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 18:43:57,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 18:44:08,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:44:11,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:44:13,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:44:17,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:44:17,413 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-12-06 18:44:17,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:44:28,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 17 treesize of output 9 [2021-12-06 18:44:28,127 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 60 proven. 86 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-06 18:44:28,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:44:28,448 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 32 proven. 6 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-12-06 18:44:28,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355335094] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:44:28,448 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:44:28,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 27, 7] total 36 [2021-12-06 18:44:28,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722078542] [2021-12-06 18:44:28,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:44:28,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-06 18:44:28,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:44:28,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-06 18:44:28,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1138, Unknown=12, NotChecked=0, Total=1260 [2021-12-06 18:44:28,450 INFO L87 Difference]: Start difference. First operand 275 states and 331 transitions. Second operand has 36 states, 36 states have (on average 4.222222222222222) internal successors, (152), 33 states have internal predecessors, (152), 16 states have call successors, (53), 10 states have call predecessors, (53), 11 states have return successors, (50), 14 states have call predecessors, (50), 15 states have call successors, (50) [2021-12-06 18:45:02,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:45:02,563 INFO L93 Difference]: Finished difference Result 353 states and 423 transitions. [2021-12-06 18:45:02,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-06 18:45:02,563 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.222222222222222) internal successors, (152), 33 states have internal predecessors, (152), 16 states have call successors, (53), 10 states have call predecessors, (53), 11 states have return successors, (50), 14 states have call predecessors, (50), 15 states have call successors, (50) Word has length 163 [2021-12-06 18:45:02,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:45:02,565 INFO L225 Difference]: With dead ends: 353 [2021-12-06 18:45:02,565 INFO L226 Difference]: Without dead ends: 276 [2021-12-06 18:45:02,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 324 SyntacticMatches, 19 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 66.2s TimeCoverageRelationStatistics Valid=263, Invalid=2906, Unknown=23, NotChecked=0, Total=3192 [2021-12-06 18:45:02,566 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 110 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 1874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1260 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:45:02,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 795 Invalid, 1874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 519 Invalid, 0 Unknown, 1260 Unchecked, 0.4s Time] [2021-12-06 18:45:02,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-12-06 18:45:02,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 266. [2021-12-06 18:45:02,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 186 states have (on average 1.086021505376344) internal successors, (202), 189 states have internal predecessors, (202), 51 states have call successors, (51), 28 states have call predecessors, (51), 28 states have return successors, (61), 48 states have call predecessors, (61), 48 states have call successors, (61) [2021-12-06 18:45:02,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 314 transitions. [2021-12-06 18:45:02,583 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 314 transitions. Word has length 163 [2021-12-06 18:45:02,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:45:02,583 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 314 transitions. [2021-12-06 18:45:02,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.222222222222222) internal successors, (152), 33 states have internal predecessors, (152), 16 states have call successors, (53), 10 states have call predecessors, (53), 11 states have return successors, (50), 14 states have call predecessors, (50), 15 states have call successors, (50) [2021-12-06 18:45:02,583 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 314 transitions. [2021-12-06 18:45:02,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-06 18:45:02,584 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:45:02,584 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-06 18:45:02,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-06 18:45:02,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:45:02,786 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:45:02,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:45:02,787 INFO L85 PathProgramCache]: Analyzing trace with hash 513147373, now seen corresponding path program 1 times [2021-12-06 18:45:02,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:45:02,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239101656] [2021-12-06 18:45:02,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:45:02,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:45:02,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:02,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:45:02,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:02,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:45:02,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:02,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 18:45:02,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:02,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:45:02,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:02,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:45:02,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:02,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 18:45:02,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:02,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 18:45:02,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:03,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 18:45:03,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:03,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:45:03,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:03,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:45:03,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:03,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-06 18:45:03,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:03,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-06 18:45:03,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:03,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 18:45:03,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:03,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:45:03,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:03,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-06 18:45:03,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:03,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-06 18:45:03,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:03,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 18:45:03,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:03,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-06 18:45:03,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:03,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-06 18:45:03,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:03,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-12-06 18:45:03,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:03,162 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 28 proven. 12 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2021-12-06 18:45:03,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:45:03,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239101656] [2021-12-06 18:45:03,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239101656] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:45:03,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102288618] [2021-12-06 18:45:03,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:45:03,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:45:03,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:45:03,164 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:45:03,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-06 18:45:03,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:03,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 2839 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 18:45:03,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:45:03,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:45:03,925 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-06 18:45:03,925 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:45:03,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102288618] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:45:03,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:45:03,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2021-12-06 18:45:03,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43153054] [2021-12-06 18:45:03,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:45:03,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 18:45:03,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:45:03,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 18:45:03,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-12-06 18:45:03,927 INFO L87 Difference]: Start difference. First operand 266 states and 314 transitions. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 4 states have call successors, (21), 3 states have call predecessors, (21), 4 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2021-12-06 18:45:04,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:45:04,058 INFO L93 Difference]: Finished difference Result 393 states and 450 transitions. [2021-12-06 18:45:04,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 18:45:04,059 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 4 states have call successors, (21), 3 states have call predecessors, (21), 4 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) Word has length 163 [2021-12-06 18:45:04,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:45:04,060 INFO L225 Difference]: With dead ends: 393 [2021-12-06 18:45:04,060 INFO L226 Difference]: Without dead ends: 298 [2021-12-06 18:45:04,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 189 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-12-06 18:45:04,061 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 18 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:45:04,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 617 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 142 Unchecked, 0.1s Time] [2021-12-06 18:45:04,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-12-06 18:45:04,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 288. [2021-12-06 18:45:04,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 210 states have (on average 1.0857142857142856) internal successors, (228), 215 states have internal predecessors, (228), 46 states have call successors, (46), 29 states have call predecessors, (46), 31 states have return successors, (52), 43 states have call predecessors, (52), 43 states have call successors, (52) [2021-12-06 18:45:04,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 326 transitions. [2021-12-06 18:45:04,082 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 326 transitions. Word has length 163 [2021-12-06 18:45:04,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:45:04,082 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 326 transitions. [2021-12-06 18:45:04,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 4 states have call successors, (21), 3 states have call predecessors, (21), 4 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2021-12-06 18:45:04,082 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 326 transitions. [2021-12-06 18:45:04,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-12-06 18:45:04,083 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:45:04,083 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:45:04,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-06 18:45:04,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-06 18:45:04,285 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:45:04,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:45:04,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1527377470, now seen corresponding path program 2 times [2021-12-06 18:45:04,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:45:04,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334890131] [2021-12-06 18:45:04,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:45:04,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:45:04,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:04,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:45:04,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:04,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:45:04,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:04,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 18:45:04,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:04,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:45:04,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:04,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:45:04,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:04,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 18:45:04,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:04,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 18:45:04,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:04,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 18:45:04,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:05,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:45:05,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:05,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:45:05,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:05,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-06 18:45:05,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:05,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-06 18:45:05,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:05,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 18:45:05,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:05,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:45:05,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:05,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-06 18:45:05,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:05,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-06 18:45:05,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:05,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-06 18:45:05,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:05,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-06 18:45:05,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:05,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-12-06 18:45:05,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:05,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-06 18:45:05,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:05,328 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 27 proven. 79 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-12-06 18:45:05,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:45:05,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334890131] [2021-12-06 18:45:05,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334890131] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:45:05,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477480779] [2021-12-06 18:45:05,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:45:05,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:45:05,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:45:05,329 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:45:05,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-06 18:45:05,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:45:05,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:45:05,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 2861 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-06 18:45:05,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:45:12,761 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-12-06 18:45:12,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 36 [2021-12-06 18:45:13,494 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 157 proven. 17 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-06 18:45:13,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:45:16,133 WARN L838 $PredicateComparison]: unable to prove that (forall ((|aws_byte_cursor_right_trim_pred_~#trimmed~0.base| Int) (aux_div_v_ArrVal_1581_40 Int) (aux_mod_v_ArrVal_1581_40 Int)) (or (< aux_mod_v_ArrVal_1581_40 0) (<= 18446744073709551616 aux_mod_v_ArrVal_1581_40) (not (= (mod (select (select (store |c_#memory_int| |aws_byte_cursor_right_trim_pred_~#trimmed~0.base| (store (select |c_#memory_int| |aws_byte_cursor_right_trim_pred_~#trimmed~0.base|) |c_aws_byte_cursor_right_trim_pred_~#trimmed~0.offset| (+ (* aux_div_v_ArrVal_1581_40 18446744073709551616) aux_mod_v_ArrVal_1581_40))) c_aws_byte_cursor_right_trim_pred_~source.base) c_aws_byte_cursor_right_trim_pred_~source.offset) 18446744073709551616) 0)) (= aux_mod_v_ArrVal_1581_40 0))) is different from false [2021-12-06 18:45:16,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477480779] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:45:16,164 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:45:16,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 17] total 41 [2021-12-06 18:45:16,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652274680] [2021-12-06 18:45:16,164 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:45:16,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-06 18:45:16,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:45:16,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-06 18:45:16,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1911, Unknown=2, NotChecked=88, Total=2162 [2021-12-06 18:45:16,166 INFO L87 Difference]: Start difference. First operand 288 states and 326 transitions. Second operand has 41 states, 37 states have (on average 4.054054054054054) internal successors, (150), 38 states have internal predecessors, (150), 21 states have call successors, (41), 6 states have call predecessors, (41), 10 states have return successors, (40), 18 states have call predecessors, (40), 21 states have call successors, (40) [2021-12-06 18:45:19,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:45:19,006 INFO L93 Difference]: Finished difference Result 365 states and 409 transitions. [2021-12-06 18:45:19,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-06 18:45:19,007 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 37 states have (on average 4.054054054054054) internal successors, (150), 38 states have internal predecessors, (150), 21 states have call successors, (41), 6 states have call predecessors, (41), 10 states have return successors, (40), 18 states have call predecessors, (40), 21 states have call successors, (40) Word has length 169 [2021-12-06 18:45:19,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:45:19,008 INFO L225 Difference]: With dead ends: 365 [2021-12-06 18:45:19,008 INFO L226 Difference]: Without dead ends: 282 [2021-12-06 18:45:19,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 267 SyntacticMatches, 14 SemanticMatches, 81 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1959 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=547, Invalid=6097, Unknown=2, NotChecked=160, Total=6806 [2021-12-06 18:45:19,010 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 210 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 1980 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 2981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 824 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:45:19,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 577 Invalid, 2981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1980 Invalid, 0 Unknown, 824 Unchecked, 1.2s Time] [2021-12-06 18:45:19,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-12-06 18:45:19,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 269. [2021-12-06 18:45:19,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 197 states have (on average 1.0761421319796953) internal successors, (212), 202 states have internal predecessors, (212), 42 states have call successors, (42), 28 states have call predecessors, (42), 29 states have return successors, (44), 38 states have call predecessors, (44), 39 states have call successors, (44) [2021-12-06 18:45:19,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 298 transitions. [2021-12-06 18:45:19,026 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 298 transitions. Word has length 169 [2021-12-06 18:45:19,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:45:19,026 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 298 transitions. [2021-12-06 18:45:19,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 37 states have (on average 4.054054054054054) internal successors, (150), 38 states have internal predecessors, (150), 21 states have call successors, (41), 6 states have call predecessors, (41), 10 states have return successors, (40), 18 states have call predecessors, (40), 21 states have call successors, (40) [2021-12-06 18:45:19,026 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 298 transitions. [2021-12-06 18:45:19,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-12-06 18:45:19,027 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:45:19,028 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:45:19,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-06 18:45:19,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-06 18:45:19,228 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:45:19,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:45:19,229 INFO L85 PathProgramCache]: Analyzing trace with hash 755558594, now seen corresponding path program 1 times [2021-12-06 18:45:19,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:45:19,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067103225] [2021-12-06 18:45:19,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:45:19,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:45:19,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:19,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:45:19,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:19,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:45:19,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:19,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 18:45:19,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:19,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:45:19,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:19,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:45:19,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:19,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 18:45:19,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:19,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 18:45:19,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:19,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 18:45:19,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:20,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:45:20,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:20,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:45:20,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:20,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-06 18:45:20,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:20,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-06 18:45:20,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:20,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 18:45:20,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:20,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-06 18:45:20,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:20,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 18:45:20,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:20,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-06 18:45:20,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:20,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-12-06 18:45:20,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:20,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-06 18:45:20,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:20,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-12-06 18:45:20,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:20,216 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2021-12-06 18:45:20,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:45:20,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067103225] [2021-12-06 18:45:20,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067103225] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:45:20,217 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:45:20,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-12-06 18:45:20,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849085338] [2021-12-06 18:45:20,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:45:20,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 18:45:20,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:45:20,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 18:45:20,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-12-06 18:45:20,218 INFO L87 Difference]: Start difference. First operand 269 states and 298 transitions. Second operand has 25 states, 23 states have (on average 2.782608695652174) internal successors, (64), 21 states have internal predecessors, (64), 12 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (19), 12 states have call predecessors, (19), 11 states have call successors, (19) [2021-12-06 18:45:21,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:45:21,224 INFO L93 Difference]: Finished difference Result 289 states and 323 transitions. [2021-12-06 18:45:21,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 18:45:21,225 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.782608695652174) internal successors, (64), 21 states have internal predecessors, (64), 12 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (19), 12 states have call predecessors, (19), 11 states have call successors, (19) Word has length 172 [2021-12-06 18:45:21,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:45:21,226 INFO L225 Difference]: With dead ends: 289 [2021-12-06 18:45:21,226 INFO L226 Difference]: Without dead ends: 276 [2021-12-06 18:45:21,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=160, Invalid=1246, Unknown=0, NotChecked=0, Total=1406 [2021-12-06 18:45:21,227 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 101 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 1550 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 1644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 18:45:21,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 347 Invalid, 1644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1550 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 18:45:21,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-12-06 18:45:21,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 272. [2021-12-06 18:45:21,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 198 states have (on average 1.0757575757575757) internal successors, (213), 203 states have internal predecessors, (213), 44 states have call successors, (44), 28 states have call predecessors, (44), 29 states have return successors, (47), 40 states have call predecessors, (47), 41 states have call successors, (47) [2021-12-06 18:45:21,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 304 transitions. [2021-12-06 18:45:21,244 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 304 transitions. Word has length 172 [2021-12-06 18:45:21,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:45:21,244 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 304 transitions. [2021-12-06 18:45:21,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.782608695652174) internal successors, (64), 21 states have internal predecessors, (64), 12 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (19), 12 states have call predecessors, (19), 11 states have call successors, (19) [2021-12-06 18:45:21,244 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 304 transitions. [2021-12-06 18:45:21,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-12-06 18:45:21,245 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:45:21,245 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:45:21,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-12-06 18:45:21,245 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:45:21,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:45:21,246 INFO L85 PathProgramCache]: Analyzing trace with hash -637391594, now seen corresponding path program 2 times [2021-12-06 18:45:21,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:45:21,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138797648] [2021-12-06 18:45:21,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:45:21,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:45:22,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:26,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:45:26,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:26,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:45:26,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:26,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 18:45:26,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:26,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:45:26,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:26,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:45:26,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:26,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 18:45:26,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:26,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 18:45:26,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:26,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 18:45:26,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:29,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:45:29,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:29,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:45:29,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:29,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-06 18:45:29,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:29,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-06 18:45:29,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:29,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 18:45:29,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:29,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-06 18:45:29,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:29,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-06 18:45:29,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:29,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 18:45:29,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:29,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-06 18:45:29,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:29,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-12-06 18:45:29,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:29,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-06 18:45:29,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:29,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2021-12-06 18:45:29,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:29,979 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 18 proven. 81 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-12-06 18:45:29,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:45:29,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138797648] [2021-12-06 18:45:29,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138797648] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:45:29,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286900454] [2021-12-06 18:45:29,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:45:29,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:45:29,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:45:29,980 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:45:29,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-06 18:45:31,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:45:31,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:45:31,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 2883 conjuncts, 222 conjunts are in the unsatisfiable core [2021-12-06 18:45:31,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:45:31,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:45:32,107 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-06 18:45:32,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:45:32,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:45:32,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:45:32,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:45:36,327 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:45:36,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-06 18:45:36,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:45:36,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 45 treesize of output 41 [2021-12-06 18:45:36,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2021-12-06 18:45:41,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:41,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 90 treesize of output 88 [2021-12-06 18:45:41,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:41,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:41,342 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-12-06 18:45:41,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 114 treesize of output 108 [2021-12-06 18:45:41,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:41,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 124 treesize of output 118 [2021-12-06 18:45:41,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:41,640 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-12-06 18:45:41,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 47 [2021-12-06 18:45:41,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 39 treesize of output 31 [2021-12-06 18:45:41,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 39 [2021-12-06 18:45:49,212 INFO L354 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2021-12-06 18:45:49,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 26 [2021-12-06 18:45:49,233 INFO L354 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2021-12-06 18:45:49,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 32 [2021-12-06 18:45:49,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 18:45:49,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-06 18:45:49,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:49,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-12-06 18:45:52,280 INFO L354 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2021-12-06 18:45:52,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 26 [2021-12-06 18:45:52,300 INFO L354 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2021-12-06 18:45:52,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 32 [2021-12-06 18:45:52,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 18:45:52,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-06 18:45:52,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 18:45:52,627 INFO L354 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2021-12-06 18:45:52,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 26 [2021-12-06 18:45:52,648 INFO L354 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2021-12-06 18:45:52,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 32 [2021-12-06 18:45:52,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-06 18:45:56,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 18:45:56,690 INFO L354 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2021-12-06 18:45:56,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 32 [2021-12-06 18:45:56,712 INFO L354 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2021-12-06 18:45:56,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 26 [2021-12-06 18:45:56,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-06 18:46:01,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:46:01,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:46:01,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:46:01,273 INFO L354 Elim1Store]: treesize reduction 66, result has 25.8 percent of original size [2021-12-06 18:46:01,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 80 treesize of output 83 [2021-12-06 18:46:01,305 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:46:01,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 47 treesize of output 51 [2021-12-06 18:46:01,360 INFO L354 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2021-12-06 18:46:01,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 80 treesize of output 84 [2021-12-06 18:46:01,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-06 18:46:01,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:46:01,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2021-12-06 18:46:01,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:46:01,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 115 [2021-12-06 18:48:32,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 129 treesize of output 113 [2021-12-06 18:48:32,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 110 treesize of output 78 [2021-12-06 18:48:35,216 INFO L354 Elim1Store]: treesize reduction 100, result has 17.4 percent of original size [2021-12-06 18:48:35,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 12 case distinctions, treesize of input 187 treesize of output 133 [2021-12-06 18:48:35,674 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 42 proven. 180 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-06 18:48:35,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:49:46,138 WARN L227 SmtUtils]: Spent 9.63s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:49:56,069 WARN L227 SmtUtils]: Spent 8.90s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:50:33,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286900454] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:50:33,892 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:50:33,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 54] total 91 [2021-12-06 18:50:33,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456783177] [2021-12-06 18:50:33,892 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:50:33,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2021-12-06 18:50:33,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:50:33,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-12-06 18:50:33,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=9873, Unknown=73, NotChecked=0, Total=10302 [2021-12-06 18:50:33,894 INFO L87 Difference]: Start difference. First operand 272 states and 304 transitions. Second operand has 91 states, 80 states have (on average 2.3625) internal successors, (189), 75 states have internal predecessors, (189), 29 states have call successors, (44), 14 states have call predecessors, (44), 17 states have return successors, (40), 20 states have call predecessors, (40), 25 states have call successors, (40) [2021-12-06 18:52:16,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:52:16,919 INFO L93 Difference]: Finished difference Result 405 states and 447 transitions. [2021-12-06 18:52:16,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-12-06 18:52:16,920 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 80 states have (on average 2.3625) internal successors, (189), 75 states have internal predecessors, (189), 29 states have call successors, (44), 14 states have call predecessors, (44), 17 states have return successors, (40), 20 states have call predecessors, (40), 25 states have call successors, (40) Word has length 175 [2021-12-06 18:52:16,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:52:16,922 INFO L225 Difference]: With dead ends: 405 [2021-12-06 18:52:16,922 INFO L226 Difference]: Without dead ends: 290 [2021-12-06 18:52:16,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 180 SyntacticMatches, 33 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9850 ImplicationChecksByTransitivity, 269.3s TimeCoverageRelationStatistics Valid=1022, Invalid=26935, Unknown=99, NotChecked=0, Total=28056 [2021-12-06 18:52:16,925 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 144 mSDsluCounter, 2145 mSDsCounter, 0 mSdLazyCounter, 2805 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 2256 SdHoareTripleChecker+Invalid, 6417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 2805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3513 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:52:16,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 2256 Invalid, 6417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 2805 Invalid, 0 Unknown, 3513 Unchecked, 10.6s Time] [2021-12-06 18:52:16,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-12-06 18:52:16,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 270. [2021-12-06 18:52:16,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 197 states have (on average 1.0710659898477157) internal successors, (211), 201 states have internal predecessors, (211), 43 states have call successors, (43), 28 states have call predecessors, (43), 29 states have return successors, (46), 40 states have call predecessors, (46), 40 states have call successors, (46) [2021-12-06 18:52:16,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 300 transitions. [2021-12-06 18:52:16,944 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 300 transitions. Word has length 175 [2021-12-06 18:52:16,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:52:16,944 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 300 transitions. [2021-12-06 18:52:16,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 80 states have (on average 2.3625) internal successors, (189), 75 states have internal predecessors, (189), 29 states have call successors, (44), 14 states have call predecessors, (44), 17 states have return successors, (40), 20 states have call predecessors, (40), 25 states have call successors, (40) [2021-12-06 18:52:16,944 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 300 transitions. [2021-12-06 18:52:16,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-12-06 18:52:16,945 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:52:16,946 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 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] [2021-12-06 18:52:16,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-06 18:52:17,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-06 18:52:17,147 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:52:17,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:52:17,149 INFO L85 PathProgramCache]: Analyzing trace with hash 2112797455, now seen corresponding path program 3 times [2021-12-06 18:52:17,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:52:17,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657957641] [2021-12-06 18:52:17,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:52:17,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:52:17,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:17,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:52:17,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:17,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:52:17,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:17,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 18:52:17,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:17,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:52:17,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:17,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:52:17,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:17,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 18:52:17,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:17,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 18:52:17,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:17,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 18:52:17,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:17,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:52:17,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:17,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:52:17,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:17,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-06 18:52:17,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:17,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-06 18:52:17,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:17,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 18:52:17,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:17,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:52:17,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:17,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-06 18:52:17,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:17,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-06 18:52:17,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:17,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-06 18:52:17,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:17,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-06 18:52:17,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:18,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-06 18:52:18,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:18,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-06 18:52:18,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:18,015 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 48 proven. 33 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-12-06 18:52:18,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:52:18,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657957641] [2021-12-06 18:52:18,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657957641] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:52:18,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130301243] [2021-12-06 18:52:18,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:52:18,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:52:18,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:52:18,017 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:52:18,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-06 18:52:18,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 18:52:18,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:52:18,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 2633 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-06 18:52:18,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:52:20,636 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-12-06 18:52:20,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 31 treesize of output 34 [2021-12-06 18:52:24,675 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 164 proven. 30 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-06 18:52:24,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:52:25,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 64 treesize of output 52 [2021-12-06 18:52:28,296 WARN L838 $PredicateComparison]: unable to prove that (forall ((|aws_byte_cursor_right_trim_pred_~#trimmed~0.base| Int) (aux_div_v_ArrVal_1852_40 Int) (aux_mod_v_ArrVal_1852_40 Int)) (or (<= aux_mod_v_ArrVal_1852_40 0) (<= 18446744073709551616 aux_mod_v_ArrVal_1852_40) (<= 1 (let ((.cse0 (select (select (store |c_#memory_int| |aws_byte_cursor_right_trim_pred_~#trimmed~0.base| (store (select |c_#memory_int| |aws_byte_cursor_right_trim_pred_~#trimmed~0.base|) |c_aws_byte_cursor_right_trim_pred_~#trimmed~0.offset| (+ (* aux_div_v_ArrVal_1852_40 18446744073709551616) aux_mod_v_ArrVal_1852_40))) |c_aws_byte_cursor_right_trim_pred_#in~source.base|) |c_aws_byte_cursor_right_trim_pred_#in~source.offset|))) (+ .cse0 (* 18446744073709551616 (div (+ 18446744073709551615 (* .cse0 (- 1))) 18446744073709551616))))))) is different from false [2021-12-06 18:52:28,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130301243] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:52:28,375 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:52:28,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 28 [2021-12-06 18:52:28,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035969281] [2021-12-06 18:52:28,376 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:52:28,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-06 18:52:28,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:52:28,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-06 18:52:28,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=802, Unknown=1, NotChecked=58, Total=992 [2021-12-06 18:52:28,377 INFO L87 Difference]: Start difference. First operand 270 states and 300 transitions. Second operand has 28 states, 28 states have (on average 5.321428571428571) internal successors, (149), 26 states have internal predecessors, (149), 11 states have call successors, (38), 6 states have call predecessors, (38), 9 states have return successors, (38), 11 states have call predecessors, (38), 11 states have call successors, (38) [2021-12-06 18:52:34,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:52:34,127 INFO L93 Difference]: Finished difference Result 324 states and 352 transitions. [2021-12-06 18:52:34,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 18:52:34,128 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.321428571428571) internal successors, (149), 26 states have internal predecessors, (149), 11 states have call successors, (38), 6 states have call predecessors, (38), 9 states have return successors, (38), 11 states have call predecessors, (38), 11 states have call successors, (38) Word has length 175 [2021-12-06 18:52:34,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:52:34,129 INFO L225 Difference]: With dead ends: 324 [2021-12-06 18:52:34,129 INFO L226 Difference]: Without dead ends: 279 [2021-12-06 18:52:34,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 275 SyntacticMatches, 18 SemanticMatches, 52 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=388, Invalid=2371, Unknown=1, NotChecked=102, Total=2862 [2021-12-06 18:52:34,130 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 124 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 1145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 356 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:52:34,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 446 Invalid, 1145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 735 Invalid, 0 Unknown, 356 Unchecked, 2.4s Time] [2021-12-06 18:52:34,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-12-06 18:52:34,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 276. [2021-12-06 18:52:34,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 205 states have (on average 1.0731707317073171) internal successors, (220), 210 states have internal predecessors, (220), 40 states have call successors, (40), 28 states have call predecessors, (40), 30 states have return successors, (43), 37 states have call predecessors, (43), 38 states have call successors, (43) [2021-12-06 18:52:34,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 303 transitions. [2021-12-06 18:52:34,149 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 303 transitions. Word has length 175 [2021-12-06 18:52:34,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:52:34,149 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 303 transitions. [2021-12-06 18:52:34,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.321428571428571) internal successors, (149), 26 states have internal predecessors, (149), 11 states have call successors, (38), 6 states have call predecessors, (38), 9 states have return successors, (38), 11 states have call predecessors, (38), 11 states have call successors, (38) [2021-12-06 18:52:34,149 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 303 transitions. [2021-12-06 18:52:34,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-06 18:52:34,150 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:52:34,150 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:52:34,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-06 18:52:34,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-06 18:52:34,351 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:52:34,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:52:34,352 INFO L85 PathProgramCache]: Analyzing trace with hash 805323361, now seen corresponding path program 1 times [2021-12-06 18:52:34,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:52:34,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640287149] [2021-12-06 18:52:34,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:52:34,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:52:34,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:34,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:52:34,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:34,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:52:34,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:34,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 18:52:34,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:34,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:52:34,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:34,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:52:34,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:34,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 18:52:34,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:34,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 18:52:34,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:34,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 18:52:34,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:34,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:52:34,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:34,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:52:34,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:34,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-06 18:52:34,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:34,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-06 18:52:34,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:34,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 18:52:34,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:34,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-06 18:52:34,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:34,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 18:52:34,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:34,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-06 18:52:34,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:34,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-12-06 18:52:34,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:34,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-06 18:52:34,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:34,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-12-06 18:52:34,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:35,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-06 18:52:35,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:35,092 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2021-12-06 18:52:35,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:52:35,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640287149] [2021-12-06 18:52:35,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640287149] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:52:35,092 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:52:35,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-06 18:52:35,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844681134] [2021-12-06 18:52:35,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:52:35,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 18:52:35,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:52:35,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 18:52:35,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-06 18:52:35,093 INFO L87 Difference]: Start difference. First operand 276 states and 303 transitions. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 9 states have internal predecessors, (64), 4 states have call successors, (22), 4 states have call predecessors, (22), 3 states have return successors, (20), 5 states have call predecessors, (20), 4 states have call successors, (20) [2021-12-06 18:52:36,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:52:36,891 INFO L93 Difference]: Finished difference Result 297 states and 324 transitions. [2021-12-06 18:52:36,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 18:52:36,892 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 9 states have internal predecessors, (64), 4 states have call successors, (22), 4 states have call predecessors, (22), 3 states have return successors, (20), 5 states have call predecessors, (20), 4 states have call successors, (20) Word has length 178 [2021-12-06 18:52:36,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:52:36,893 INFO L225 Difference]: With dead ends: 297 [2021-12-06 18:52:36,894 INFO L226 Difference]: Without dead ends: 280 [2021-12-06 18:52:36,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-12-06 18:52:36,894 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 99 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:52:36,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 327 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-06 18:52:36,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-12-06 18:52:36,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 276. [2021-12-06 18:52:36,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 205 states have (on average 1.0731707317073171) internal successors, (220), 210 states have internal predecessors, (220), 40 states have call successors, (40), 28 states have call predecessors, (40), 30 states have return successors, (41), 37 states have call predecessors, (41), 38 states have call successors, (41) [2021-12-06 18:52:36,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 301 transitions. [2021-12-06 18:52:36,914 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 301 transitions. Word has length 178 [2021-12-06 18:52:36,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:52:36,915 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 301 transitions. [2021-12-06 18:52:36,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 9 states have internal predecessors, (64), 4 states have call successors, (22), 4 states have call predecessors, (22), 3 states have return successors, (20), 5 states have call predecessors, (20), 4 states have call successors, (20) [2021-12-06 18:52:36,915 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 301 transitions. [2021-12-06 18:52:36,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-12-06 18:52:36,916 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:52:36,916 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 3, 3, 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] [2021-12-06 18:52:36,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-12-06 18:52:36,916 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:52:36,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:52:36,916 INFO L85 PathProgramCache]: Analyzing trace with hash 829434654, now seen corresponding path program 1 times [2021-12-06 18:52:36,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:52:36,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436785357] [2021-12-06 18:52:36,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:52:36,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:52:37,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:37,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:52:37,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:38,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:52:38,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:38,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 18:52:38,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:38,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:52:38,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:38,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:52:38,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:38,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 18:52:38,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:38,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 18:52:38,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:38,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 18:52:38,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:39,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:52:39,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:39,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:52:39,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:39,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-06 18:52:39,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:39,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-06 18:52:39,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:39,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 18:52:39,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:39,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:52:39,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:39,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-06 18:52:39,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:39,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-06 18:52:39,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:39,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-06 18:52:39,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:39,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-06 18:52:39,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:39,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-06 18:52:39,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:39,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2021-12-06 18:52:39,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:39,618 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 56 proven. 5 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2021-12-06 18:52:39,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:52:39,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436785357] [2021-12-06 18:52:39,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436785357] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:52:39,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670283624] [2021-12-06 18:52:39,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:52:39,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:52:39,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:52:39,620 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:52:39,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-06 18:52:40,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:40,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 2905 conjuncts, 102 conjunts are in the unsatisfiable core [2021-12-06 18:52:40,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:52:40,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:52:41,193 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-12-06 18:52:41,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 9 [2021-12-06 18:52:41,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 18:52:42,614 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-12-06 18:52:42,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2021-12-06 18:52:42,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:52:45,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:52:51,953 INFO L354 Elim1Store]: treesize reduction 35, result has 35.2 percent of original size [2021-12-06 18:52:51,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 37 [2021-12-06 18:52:52,081 INFO L354 Elim1Store]: treesize reduction 35, result has 35.2 percent of original size [2021-12-06 18:52:52,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 37 [2021-12-06 18:52:58,332 INFO L354 Elim1Store]: treesize reduction 35, result has 35.2 percent of original size [2021-12-06 18:52:58,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 37 [2021-12-06 18:52:58,436 INFO L354 Elim1Store]: treesize reduction 35, result has 35.2 percent of original size [2021-12-06 18:52:58,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 37 [2021-12-06 18:52:58,661 INFO L354 Elim1Store]: treesize reduction 35, result has 35.2 percent of original size [2021-12-06 18:52:58,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 37 [2021-12-06 18:53:04,925 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 18:53:04,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2021-12-06 18:53:12,925 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 112 proven. 112 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-06 18:53:12,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:53:16,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670283624] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:53:16,461 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:53:16,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 29] total 45 [2021-12-06 18:53:16,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98178789] [2021-12-06 18:53:16,462 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:53:16,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-06 18:53:16,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:53:16,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-06 18:53:16,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=2439, Unknown=9, NotChecked=0, Total=2652 [2021-12-06 18:53:16,463 INFO L87 Difference]: Start difference. First operand 276 states and 301 transitions. Second operand has 45 states, 42 states have (on average 3.4047619047619047) internal successors, (143), 38 states have internal predecessors, (143), 20 states have call successors, (40), 9 states have call predecessors, (40), 9 states have return successors, (39), 21 states have call predecessors, (39), 19 states have call successors, (39) [2021-12-06 18:53:29,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:53:29,060 INFO L93 Difference]: Finished difference Result 401 states and 438 transitions. [2021-12-06 18:53:29,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-06 18:53:29,061 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 42 states have (on average 3.4047619047619047) internal successors, (143), 38 states have internal predecessors, (143), 20 states have call successors, (40), 9 states have call predecessors, (40), 9 states have return successors, (39), 21 states have call predecessors, (39), 19 states have call successors, (39) Word has length 181 [2021-12-06 18:53:29,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:53:29,063 INFO L225 Difference]: With dead ends: 401 [2021-12-06 18:53:29,063 INFO L226 Difference]: Without dead ends: 379 [2021-12-06 18:53:29,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 221 SyntacticMatches, 18 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1950 ImplicationChecksByTransitivity, 44.7s TimeCoverageRelationStatistics Valid=424, Invalid=5114, Unknown=12, NotChecked=0, Total=5550 [2021-12-06 18:53:29,064 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 151 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 931 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 849 SdHoareTripleChecker+Invalid, 1822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 756 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:53:29,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 849 Invalid, 1822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 931 Invalid, 0 Unknown, 756 Unchecked, 2.3s Time] [2021-12-06 18:53:29,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-12-06 18:53:29,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 315. [2021-12-06 18:53:29,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 236 states have (on average 1.0720338983050848) internal successors, (253), 241 states have internal predecessors, (253), 44 states have call successors, (44), 31 states have call predecessors, (44), 34 states have return successors, (46), 42 states have call predecessors, (46), 42 states have call successors, (46) [2021-12-06 18:53:29,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 343 transitions. [2021-12-06 18:53:29,086 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 343 transitions. Word has length 181 [2021-12-06 18:53:29,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:53:29,086 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 343 transitions. [2021-12-06 18:53:29,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 42 states have (on average 3.4047619047619047) internal successors, (143), 38 states have internal predecessors, (143), 20 states have call successors, (40), 9 states have call predecessors, (40), 9 states have return successors, (39), 21 states have call predecessors, (39), 19 states have call successors, (39) [2021-12-06 18:53:29,086 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 343 transitions. [2021-12-06 18:53:29,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-12-06 18:53:29,087 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:53:29,087 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:53:29,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-12-06 18:53:29,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-12-06 18:53:29,288 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:53:29,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:53:29,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1181056314, now seen corresponding path program 3 times [2021-12-06 18:53:29,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:53:29,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508917625] [2021-12-06 18:53:29,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:53:29,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:53:31,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:53:35,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:53:35,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:53:35,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:53:35,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:53:35,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 18:53:35,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:53:36,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:53:36,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:53:36,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:53:36,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:53:36,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 18:53:36,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:53:36,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 18:53:36,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:53:36,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 18:53:36,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:53:49,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:53:49,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:53:50,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:53:50,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:53:50,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-06 18:53:50,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:53:50,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-06 18:53:50,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:53:50,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 18:53:50,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:53:51,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-06 18:53:51,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:53:51,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 18:53:51,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:53:51,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 18:53:51,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:53:51,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 18:53:51,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:53:51,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-06 18:53:51,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:53:51,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-12-06 18:53:51,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:53:51,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-12-06 18:53:51,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:53:51,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-12-06 18:53:51,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:53:51,842 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 29 proven. 46 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2021-12-06 18:53:51,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:53:51,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508917625] [2021-12-06 18:53:51,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508917625] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:53:51,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936672039] [2021-12-06 18:53:51,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:53:51,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:53:51,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:53:51,843 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:53:51,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75085ae-4e58-462a-8903-8523e3680c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-06 18:53:54,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-06 18:53:54,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:53:54,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 2934 conjuncts, 215 conjunts are in the unsatisfiable core [2021-12-06 18:53:54,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:53:54,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:53:58,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:53:59,584 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-06 18:53:59,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:54:00,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:54:00,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:54:00,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:54:06,279 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:54:06,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-06 18:54:07,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 18 [2021-12-06 18:54:07,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 18:54:07,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2021-12-06 18:54:10,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:54:10,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 83 treesize of output 83 [2021-12-06 18:54:10,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:54:10,959 INFO L354 Elim1Store]: treesize reduction 164, result has 20.8 percent of original size [2021-12-06 18:54:10,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 114 treesize of output 124 [2021-12-06 18:54:10,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:54:10,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 164 treesize of output 156 [2021-12-06 18:54:11,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 27 treesize of output 23 [2021-12-06 18:54:11,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 53 treesize of output 37 [2021-12-06 18:54:12,013 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-12-06 18:54:12,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 51 [2021-12-06 18:54:14,354 INFO L354 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2021-12-06 18:54:14,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 30 [2021-12-06 18:54:14,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 18:54:14,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 18:54:14,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2021-12-06 18:54:16,519 INFO L354 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2021-12-06 18:54:16,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 30 [2021-12-06 18:54:16,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 18:54:16,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 18:54:16,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 7 treesize of output 5 [2021-12-06 18:54:18,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 18:54:18,543 INFO L354 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2021-12-06 18:54:18,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 30 [2021-12-06 18:54:18,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 18:54:18,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 7 treesize of output 5 [2021-12-06 18:54:19,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 18:54:19,582 INFO L354 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2021-12-06 18:54:19,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 30 [2021-12-06 18:54:19,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 18:54:19,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 7 treesize of output 5 [2021-12-06 18:54:20,524 INFO L354 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2021-12-06 18:54:20,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 30 [2021-12-06 18:54:20,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 18:54:20,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 18:54:20,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 7 treesize of output 5 [2021-12-06 18:54:24,241 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:54:24,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 40 treesize of output 46 [2021-12-06 18:54:24,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:54:24,447 INFO L354 Elim1Store]: treesize reduction 64, result has 29.7 percent of original size [2021-12-06 18:54:24,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 73 treesize of output 87 [2021-12-06 18:54:24,520 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:54:24,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 73 treesize of output 73 [2021-12-06 18:54:25,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 63 treesize of output 47 [2021-12-06 18:54:25,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 7 treesize of output 5 [2021-12-06 18:54:25,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 17 [2021-12-06 18:54:25,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 31 treesize of output 27 [2021-12-06 18:54:25,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 21