./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_harness.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 884fded8e66f5d1fb48ea41b5fc2a80efc48c733a21e019f076525ed24611a3d --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 09:34:59,377 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 09:34:59,379 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 09:34:59,407 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 09:34:59,407 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 09:34:59,409 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 09:34:59,414 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 09:34:59,417 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 09:34:59,419 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 09:34:59,425 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 09:34:59,426 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 09:34:59,428 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 09:34:59,428 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 09:34:59,430 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 09:34:59,431 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 09:34:59,433 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 09:34:59,434 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 09:34:59,435 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 09:34:59,439 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 09:34:59,441 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 09:34:59,445 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 09:34:59,446 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 09:34:59,448 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 09:34:59,449 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 09:34:59,450 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 09:34:59,453 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 09:34:59,456 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 09:34:59,457 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 09:34:59,458 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 09:34:59,458 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 09:34:59,459 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 09:34:59,459 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 09:34:59,461 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 09:34:59,462 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 09:34:59,463 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 09:34:59,464 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 09:34:59,464 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 09:34:59,465 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 09:34:59,465 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 09:34:59,465 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 09:34:59,466 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 09:34:59,467 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 09:34:59,471 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-07-21 09:34:59,511 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 09:34:59,511 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 09:34:59,512 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 09:34:59,512 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 09:34:59,512 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 09:34:59,513 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 09:34:59,513 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 09:34:59,513 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 09:34:59,514 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 09:34:59,514 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 09:34:59,514 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 09:34:59,514 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 09:34:59,514 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 09:34:59,514 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 09:34:59,515 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 09:34:59,515 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 09:34:59,519 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 09:34:59,520 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 09:34:59,520 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 09:34:59,520 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 09:34:59,520 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 09:34:59,527 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:34:59,528 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 09:34:59,528 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 09:34:59,528 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 09:34:59,528 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 09:34:59,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 09:34:59,529 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 09:34:59,530 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 09:34:59,530 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 09:34:59,530 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 884fded8e66f5d1fb48ea41b5fc2a80efc48c733a21e019f076525ed24611a3d [2022-07-21 09:34:59,838 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 09:34:59,866 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 09:34:59,870 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 09:34:59,871 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 09:34:59,871 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 09:34:59,873 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_harness.i [2022-07-21 09:34:59,937 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b681f3c0/155548c4bfce4170b7c04f3e2c98aff3/FLAG533a6007f [2022-07-21 09:35:00,706 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 09:35:00,707 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_harness.i [2022-07-21 09:35:00,742 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b681f3c0/155548c4bfce4170b7c04f3e2c98aff3/FLAG533a6007f [2022-07-21 09:35:00,904 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b681f3c0/155548c4bfce4170b7c04f3e2c98aff3 [2022-07-21 09:35:00,907 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 09:35:00,908 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 09:35:00,909 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 09:35:00,909 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 09:35:00,912 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 09:35:00,913 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:35:00" (1/1) ... [2022-07-21 09:35:00,913 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75ec911c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:35:00, skipping insertion in model container [2022-07-21 09:35:00,914 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:35:00" (1/1) ... [2022-07-21 09:35:00,919 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 09:35:00,995 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 09:35:01,285 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_harness.i[4492,4505] [2022-07-21 09:35:01,292 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_harness.i[4552,4565] [2022-07-21 09:35:02,202 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:35:02,203 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:35:02,204 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:35:02,204 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:35:02,205 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:35:02,216 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:35:02,217 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:35:02,219 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:35:02,219 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:35:02,523 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-07-21 09:35:02,524 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-07-21 09:35:02,526 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-07-21 09:35:02,527 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-07-21 09:35:02,528 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-07-21 09:35:02,529 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-07-21 09:35:02,530 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-07-21 09:35:02,530 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-07-21 09:35:02,531 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-07-21 09:35:02,531 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-07-21 09:35:02,647 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-07-21 09:35:02,716 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:35:02,717 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:35:02,777 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:35:02,815 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 09:35:02,827 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_harness.i[4492,4505] [2022-07-21 09:35:02,827 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_harness.i[4552,4565] [2022-07-21 09:35:02,854 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:35:02,854 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:35:02,855 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:35:02,862 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:35:02,863 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:35:02,867 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:35:02,873 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:35:02,874 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:35:02,875 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:35:02,924 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-07-21 09:35:02,926 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-07-21 09:35:02,927 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-07-21 09:35:02,927 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-07-21 09:35:02,928 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-07-21 09:35:02,928 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-07-21 09:35:02,929 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-07-21 09:35:02,930 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-07-21 09:35:02,930 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-07-21 09:35:02,930 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-07-21 09:35:02,955 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-07-21 09:35:02,995 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:35:02,996 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:35:03,030 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:35:03,230 INFO L208 MainTranslator]: Completed translation [2022-07-21 09:35:03,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:35:03 WrapperNode [2022-07-21 09:35:03,253 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 09:35:03,254 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 09:35:03,254 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 09:35:03,254 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 09:35:03,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:35:03" (1/1) ... [2022-07-21 09:35:03,374 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:35:03" (1/1) ... [2022-07-21 09:35:03,469 INFO L137 Inliner]: procedures = 690, calls = 2637, calls flagged for inlining = 61, calls inlined = 8, statements flattened = 871 [2022-07-21 09:35:03,470 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 09:35:03,471 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 09:35:03,471 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 09:35:03,471 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 09:35:03,478 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:35:03" (1/1) ... [2022-07-21 09:35:03,479 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:35:03" (1/1) ... [2022-07-21 09:35:03,493 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:35:03" (1/1) ... [2022-07-21 09:35:03,494 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:35:03" (1/1) ... [2022-07-21 09:35:03,539 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:35:03" (1/1) ... [2022-07-21 09:35:03,557 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:35:03" (1/1) ... [2022-07-21 09:35:03,563 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:35:03" (1/1) ... [2022-07-21 09:35:03,578 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 09:35:03,579 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 09:35:03,579 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 09:35:03,579 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 09:35:03,580 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:35:03" (1/1) ... [2022-07-21 09:35:03,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:35:03,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:35:03,640 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 09:35:03,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 09:35:03,682 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2022-07-21 09:35:03,682 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2022-07-21 09:35:03,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 09:35:03,683 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-07-21 09:35:03,683 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-07-21 09:35:03,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~real [2022-07-21 09:35:03,684 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-07-21 09:35:03,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-07-21 09:35:03,685 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 09:35:03,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-07-21 09:35:03,686 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-07-21 09:35:03,686 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-21 09:35:03,687 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-21 09:35:03,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 09:35:03,689 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 09:35:03,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-21 09:35:03,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 09:35:03,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 09:35:03,689 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-07-21 09:35:03,690 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-07-21 09:35:03,690 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2022-07-21 09:35:03,690 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2022-07-21 09:35:03,690 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-07-21 09:35:03,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-07-21 09:35:03,690 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-21 09:35:03,691 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-21 09:35:03,691 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 09:35:03,691 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-21 09:35:03,691 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_write [2022-07-21 09:35:03,692 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_write [2022-07-21 09:35:03,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-21 09:35:03,692 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2022-07-21 09:35:03,693 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2022-07-21 09:35:03,693 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-07-21 09:35:03,693 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-07-21 09:35:03,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 09:35:03,693 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~real [2022-07-21 09:35:03,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 09:35:03,972 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 09:35:03,973 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 09:35:05,208 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 09:35:05,217 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 09:35:05,217 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-21 09:35:05,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:35:05 BoogieIcfgContainer [2022-07-21 09:35:05,220 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 09:35:05,222 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 09:35:05,222 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 09:35:05,225 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 09:35:05,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 09:35:00" (1/3) ... [2022-07-21 09:35:05,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1018c2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:35:05, skipping insertion in model container [2022-07-21 09:35:05,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:35:03" (2/3) ... [2022-07-21 09:35:05,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1018c2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:35:05, skipping insertion in model container [2022-07-21 09:35:05,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:35:05" (3/3) ... [2022-07-21 09:35:05,228 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_write_harness.i [2022-07-21 09:35:05,242 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 09:35:05,242 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 09:35:05,287 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 09:35:05,292 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7ebdea94, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@124a0c8a [2022-07-21 09:35:05,293 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 09:35:05,297 INFO L276 IsEmpty]: Start isEmpty. Operand has 129 states, 85 states have (on average 1.2705882352941176) internal successors, (108), 86 states have internal predecessors, (108), 32 states have call successors, (32), 10 states have call predecessors, (32), 10 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-07-21 09:35:05,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-21 09:35:05,306 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:35:05,307 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:35:05,308 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:35:05,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:35:05,312 INFO L85 PathProgramCache]: Analyzing trace with hash 259728785, now seen corresponding path program 1 times [2022-07-21 09:35:05,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:35:05,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116447722] [2022-07-21 09:35:05,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:35:05,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:35:05,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:05,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:35:05,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:05,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:35:05,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:05,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:35:05,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:05,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-21 09:35:05,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:05,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:35:05,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:05,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-21 09:35:05,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:05,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-21 09:35:05,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:06,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-21 09:35:06,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:06,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-21 09:35:06,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:06,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-21 09:35:06,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:06,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-21 09:35:06,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:06,057 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-07-21 09:35:06,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:35:06,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116447722] [2022-07-21 09:35:06,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116447722] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:35:06,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395152093] [2022-07-21 09:35:06,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:35:06,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:35:06,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:35:06,067 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:35:06,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 09:35:06,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:06,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 2556 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 09:35:06,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:35:06,796 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-21 09:35:06,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:35:06,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395152093] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:35:06,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:35:06,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-07-21 09:35:06,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899860338] [2022-07-21 09:35:06,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:35:06,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 09:35:06,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:35:06,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 09:35:06,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-07-21 09:35:06,838 INFO L87 Difference]: Start difference. First operand has 129 states, 85 states have (on average 1.2705882352941176) internal successors, (108), 86 states have internal predecessors, (108), 32 states have call successors, (32), 10 states have call predecessors, (32), 10 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-21 09:35:07,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:35:07,114 INFO L93 Difference]: Finished difference Result 258 states and 370 transitions. [2022-07-21 09:35:07,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 09:35:07,117 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 77 [2022-07-21 09:35:07,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:35:07,127 INFO L225 Difference]: With dead ends: 258 [2022-07-21 09:35:07,127 INFO L226 Difference]: Without dead ends: 127 [2022-07-21 09:35:07,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-07-21 09:35:07,135 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 202 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 09:35:07,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 462 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 09:35:07,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-21 09:35:07,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-07-21 09:35:07,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 83 states have (on average 1.2530120481927711) internal successors, (104), 85 states have internal predecessors, (104), 32 states have call successors, (32), 10 states have call predecessors, (32), 11 states have return successors, (34), 31 states have call predecessors, (34), 31 states have call successors, (34) [2022-07-21 09:35:07,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 170 transitions. [2022-07-21 09:35:07,196 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 170 transitions. Word has length 77 [2022-07-21 09:35:07,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:35:07,196 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 170 transitions. [2022-07-21 09:35:07,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-21 09:35:07,197 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 170 transitions. [2022-07-21 09:35:07,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-21 09:35:07,200 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:35:07,200 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 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] [2022-07-21 09:35:07,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 09:35:07,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-07-21 09:35:07,424 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:35:07,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:35:07,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1492783356, now seen corresponding path program 1 times [2022-07-21 09:35:07,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:35:07,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054181725] [2022-07-21 09:35:07,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:35:07,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:35:07,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:07,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:35:07,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:07,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:35:07,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:07,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:35:07,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:07,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-21 09:35:07,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:07,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:35:07,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:07,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-21 09:35:07,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:07,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:35:07,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:07,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-21 09:35:07,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:07,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-21 09:35:07,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:07,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-21 09:35:07,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:07,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-21 09:35:07,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:07,805 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-07-21 09:35:07,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:35:07,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054181725] [2022-07-21 09:35:07,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054181725] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:35:07,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247023248] [2022-07-21 09:35:07,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:35:07,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:35:07,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:35:07,808 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:35:07,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 09:35:08,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:08,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 2573 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 09:35:08,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:35:08,413 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-21 09:35:08,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:35:08,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247023248] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:35:08,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:35:08,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-07-21 09:35:08,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436488612] [2022-07-21 09:35:08,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:35:08,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 09:35:08,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:35:08,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 09:35:08,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-07-21 09:35:08,416 INFO L87 Difference]: Start difference. First operand 127 states and 170 transitions. Second operand has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 4 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-21 09:35:08,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:35:08,732 INFO L93 Difference]: Finished difference Result 220 states and 297 transitions. [2022-07-21 09:35:08,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 09:35:08,733 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 4 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 83 [2022-07-21 09:35:08,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:35:08,735 INFO L225 Difference]: With dead ends: 220 [2022-07-21 09:35:08,735 INFO L226 Difference]: Without dead ends: 124 [2022-07-21 09:35:08,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:35:08,737 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 207 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 09:35:08,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 621 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 09:35:08,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-07-21 09:35:08,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-07-21 09:35:08,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 81 states have (on average 1.2469135802469136) internal successors, (101), 82 states have internal predecessors, (101), 32 states have call successors, (32), 10 states have call predecessors, (32), 10 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-07-21 09:35:08,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 164 transitions. [2022-07-21 09:35:08,749 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 164 transitions. Word has length 83 [2022-07-21 09:35:08,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:35:08,749 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 164 transitions. [2022-07-21 09:35:08,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 4 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-21 09:35:08,750 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 164 transitions. [2022-07-21 09:35:08,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-21 09:35:08,751 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:35:08,751 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:35:08,779 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-21 09:35:08,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-07-21 09:35:08,970 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:35:08,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:35:08,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1451742418, now seen corresponding path program 1 times [2022-07-21 09:35:08,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:35:08,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539942237] [2022-07-21 09:35:08,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:35:08,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:35:09,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:09,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:35:09,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:09,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:35:09,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:09,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:35:09,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:09,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-21 09:35:09,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:09,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:35:09,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:09,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-21 09:35:09,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:09,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:35:09,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:09,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-21 09:35:09,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:09,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-21 09:35:09,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:09,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-21 09:35:09,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:09,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-21 09:35:09,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:09,382 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-07-21 09:35:09,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:35:09,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539942237] [2022-07-21 09:35:09,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539942237] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:35:09,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:35:09,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 09:35:09,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470109573] [2022-07-21 09:35:09,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:35:09,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 09:35:09,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:35:09,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 09:35:09,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-21 09:35:09,386 INFO L87 Difference]: Start difference. First operand 124 states and 164 transitions. Second operand has 9 states, 8 states have (on average 5.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2022-07-21 09:35:10,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:35:10,204 INFO L93 Difference]: Finished difference Result 136 states and 180 transitions. [2022-07-21 09:35:10,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 09:35:10,205 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (12), 3 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 95 [2022-07-21 09:35:10,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:35:10,207 INFO L225 Difference]: With dead ends: 136 [2022-07-21 09:35:10,207 INFO L226 Difference]: Without dead ends: 134 [2022-07-21 09:35:10,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-07-21 09:35:10,209 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 86 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 09:35:10,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 581 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-21 09:35:10,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-07-21 09:35:10,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2022-07-21 09:35:10,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 87 states have (on average 1.2298850574712643) internal successors, (107), 89 states have internal predecessors, (107), 33 states have call successors, (33), 11 states have call predecessors, (33), 12 states have return successors, (37), 32 states have call predecessors, (37), 32 states have call successors, (37) [2022-07-21 09:35:10,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 177 transitions. [2022-07-21 09:35:10,221 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 177 transitions. Word has length 95 [2022-07-21 09:35:10,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:35:10,222 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 177 transitions. [2022-07-21 09:35:10,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2022-07-21 09:35:10,222 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 177 transitions. [2022-07-21 09:35:10,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-21 09:35:10,224 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:35:10,224 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-21 09:35:10,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 09:35:10,225 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:35:10,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:35:10,225 INFO L85 PathProgramCache]: Analyzing trace with hash -364356006, now seen corresponding path program 1 times [2022-07-21 09:35:10,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:35:10,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237651113] [2022-07-21 09:35:10,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:35:10,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:35:10,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:10,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:35:10,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:10,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:35:10,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:10,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:35:10,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:10,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-21 09:35:10,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:10,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:35:10,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:10,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-21 09:35:10,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:10,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:35:10,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:10,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-21 09:35:10,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:10,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-21 09:35:10,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:10,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-21 09:35:10,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:10,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-21 09:35:10,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:10,678 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-21 09:35:10,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:35:10,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237651113] [2022-07-21 09:35:10,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237651113] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:35:10,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:35:10,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 09:35:10,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466772540] [2022-07-21 09:35:10,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:35:10,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 09:35:10,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:35:10,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 09:35:10,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 09:35:10,681 INFO L87 Difference]: Start difference. First operand 133 states and 177 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2022-07-21 09:35:11,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:35:11,278 INFO L93 Difference]: Finished difference Result 267 states and 371 transitions. [2022-07-21 09:35:11,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 09:35:11,279 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (12), 3 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 99 [2022-07-21 09:35:11,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:35:11,283 INFO L225 Difference]: With dead ends: 267 [2022-07-21 09:35:11,284 INFO L226 Difference]: Without dead ends: 158 [2022-07-21 09:35:11,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-07-21 09:35:11,291 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 126 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 09:35:11,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 359 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 09:35:11,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-07-21 09:35:11,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 138. [2022-07-21 09:35:11,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 92 states have (on average 1.2391304347826086) internal successors, (114), 94 states have internal predecessors, (114), 33 states have call successors, (33), 11 states have call predecessors, (33), 12 states have return successors, (37), 32 states have call predecessors, (37), 32 states have call successors, (37) [2022-07-21 09:35:11,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 184 transitions. [2022-07-21 09:35:11,306 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 184 transitions. Word has length 99 [2022-07-21 09:35:11,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:35:11,307 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 184 transitions. [2022-07-21 09:35:11,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2022-07-21 09:35:11,307 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 184 transitions. [2022-07-21 09:35:11,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-21 09:35:11,309 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:35:11,309 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-21 09:35:11,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 09:35:11,309 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:35:11,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:35:11,310 INFO L85 PathProgramCache]: Analyzing trace with hash -106190568, now seen corresponding path program 1 times [2022-07-21 09:35:11,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:35:11,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176581172] [2022-07-21 09:35:11,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:35:11,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:35:11,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:11,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:35:11,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:11,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:35:11,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:11,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:35:11,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:11,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-21 09:35:11,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:11,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:35:11,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:11,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-21 09:35:11,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:11,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:35:11,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:11,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-21 09:35:11,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:11,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-21 09:35:11,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:11,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-21 09:35:11,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:11,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-21 09:35:11,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:11,982 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-21 09:35:11,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:35:11,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176581172] [2022-07-21 09:35:11,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176581172] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:35:11,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398117782] [2022-07-21 09:35:11,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:35:11,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:35:11,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:35:11,988 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:35:12,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 09:35:12,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:12,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 2614 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-21 09:35:12,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:35:12,593 INFO L390 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 [2022-07-21 09:35:13,192 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-21 09:35:13,194 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:35:13,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398117782] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:35:13,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:35:13,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [17] total 29 [2022-07-21 09:35:13,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574941464] [2022-07-21 09:35:13,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:35:13,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 09:35:13,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:35:13,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 09:35:13,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=738, Unknown=0, NotChecked=0, Total=812 [2022-07-21 09:35:13,197 INFO L87 Difference]: Start difference. First operand 138 states and 184 transitions. Second operand has 14 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 6 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2022-07-21 09:35:13,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:35:13,572 INFO L93 Difference]: Finished difference Result 314 states and 429 transitions. [2022-07-21 09:35:13,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 09:35:13,573 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 6 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 99 [2022-07-21 09:35:13,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:35:13,575 INFO L225 Difference]: With dead ends: 314 [2022-07-21 09:35:13,575 INFO L226 Difference]: Without dead ends: 210 [2022-07-21 09:35:13,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 104 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=85, Invalid=845, Unknown=0, NotChecked=0, Total=930 [2022-07-21 09:35:13,578 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 60 mSDsluCounter, 1097 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 1285 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 09:35:13,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 1285 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 131 Invalid, 0 Unknown, 137 Unchecked, 0.3s Time] [2022-07-21 09:35:13,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-07-21 09:35:13,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 172. [2022-07-21 09:35:13,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 120 states have (on average 1.25) internal successors, (150), 123 states have internal predecessors, (150), 36 states have call successors, (36), 14 states have call predecessors, (36), 15 states have return successors, (42), 34 states have call predecessors, (42), 35 states have call successors, (42) [2022-07-21 09:35:13,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 228 transitions. [2022-07-21 09:35:13,607 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 228 transitions. Word has length 99 [2022-07-21 09:35:13,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:35:13,608 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 228 transitions. [2022-07-21 09:35:13,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 6 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2022-07-21 09:35:13,608 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 228 transitions. [2022-07-21 09:35:13,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-21 09:35:13,624 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:35:13,624 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-21 09:35:13,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 09:35:13,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:35:13,852 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:35:13,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:35:13,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1130210654, now seen corresponding path program 2 times [2022-07-21 09:35:13,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:35:13,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220139980] [2022-07-21 09:35:13,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:35:13,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:35:13,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:14,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:35:14,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:14,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:35:14,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:14,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:35:14,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:14,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-21 09:35:14,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:14,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:35:14,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:14,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-21 09:35:14,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:14,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-21 09:35:14,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:14,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-07-21 09:35:14,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:14,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-21 09:35:14,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:14,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-21 09:35:14,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:14,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-21 09:35:14,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:14,165 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-07-21 09:35:14,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:35:14,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220139980] [2022-07-21 09:35:14,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220139980] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:35:14,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383036368] [2022-07-21 09:35:14,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:35:14,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:35:14,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:35:14,168 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:35:14,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 09:35:15,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:35:15,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:35:15,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 2621 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-21 09:35:15,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:35:15,267 INFO L390 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 [2022-07-21 09:35:15,764 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-21 09:35:15,764 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:35:15,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383036368] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:35:15,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:35:15,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [10] total 22 [2022-07-21 09:35:15,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931492962] [2022-07-21 09:35:15,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:35:15,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 09:35:15,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:35:15,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 09:35:15,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2022-07-21 09:35:15,767 INFO L87 Difference]: Start difference. First operand 172 states and 228 transitions. Second operand has 14 states, 13 states have (on average 5.538461538461538) internal successors, (72), 12 states have internal predecessors, (72), 6 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2022-07-21 09:35:15,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:35:15,946 INFO L93 Difference]: Finished difference Result 359 states and 488 transitions. [2022-07-21 09:35:15,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 09:35:15,947 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 5.538461538461538) internal successors, (72), 12 states have internal predecessors, (72), 6 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 103 [2022-07-21 09:35:15,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:35:15,950 INFO L225 Difference]: With dead ends: 359 [2022-07-21 09:35:15,950 INFO L226 Difference]: Without dead ends: 251 [2022-07-21 09:35:15,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 109 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2022-07-21 09:35:15,951 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 64 mSDsluCounter, 1011 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 1211 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 09:35:15,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 1211 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 135 Invalid, 0 Unknown, 73 Unchecked, 0.1s Time] [2022-07-21 09:35:15,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-07-21 09:35:15,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 213. [2022-07-21 09:35:15,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 155 states have (on average 1.2516129032258065) internal successors, (194), 159 states have internal predecessors, (194), 39 states have call successors, (39), 17 states have call predecessors, (39), 18 states have return successors, (49), 36 states have call predecessors, (49), 38 states have call successors, (49) [2022-07-21 09:35:15,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 282 transitions. [2022-07-21 09:35:15,968 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 282 transitions. Word has length 103 [2022-07-21 09:35:15,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:35:15,969 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 282 transitions. [2022-07-21 09:35:15,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 5.538461538461538) internal successors, (72), 12 states have internal predecessors, (72), 6 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2022-07-21 09:35:15,969 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 282 transitions. [2022-07-21 09:35:15,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-21 09:35:15,971 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:35:15,971 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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] [2022-07-21 09:35:16,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 09:35:16,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:35:16,200 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:35:16,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:35:16,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1553857376, now seen corresponding path program 1 times [2022-07-21 09:35:16,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:35:16,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49259172] [2022-07-21 09:35:16,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:35:16,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:35:16,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:16,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:35:16,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:16,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:35:16,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:16,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:35:16,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:16,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-21 09:35:16,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:16,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:35:16,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:16,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-21 09:35:16,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:16,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-21 09:35:16,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:16,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-07-21 09:35:16,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:16,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-21 09:35:16,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:16,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-21 09:35:16,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:16,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-21 09:35:16,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:16,432 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-07-21 09:35:16,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:35:16,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49259172] [2022-07-21 09:35:16,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49259172] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:35:16,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943934086] [2022-07-21 09:35:16,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:35:16,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:35:16,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:35:16,434 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:35:16,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 09:35:16,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:16,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 2616 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 09:35:16,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:35:16,911 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-21 09:35:16,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:35:16,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943934086] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:35:16,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:35:16,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-07-21 09:35:16,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291421723] [2022-07-21 09:35:16,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:35:16,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 09:35:16,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:35:16,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 09:35:16,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:35:16,913 INFO L87 Difference]: Start difference. First operand 213 states and 282 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-21 09:35:16,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:35:16,941 INFO L93 Difference]: Finished difference Result 387 states and 523 transitions. [2022-07-21 09:35:16,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 09:35:16,942 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 103 [2022-07-21 09:35:16,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:35:16,943 INFO L225 Difference]: With dead ends: 387 [2022-07-21 09:35:16,943 INFO L226 Difference]: Without dead ends: 227 [2022-07-21 09:35:16,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-21 09:35:16,945 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 20 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 09:35:16,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 484 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 09:35:16,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-07-21 09:35:16,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 201. [2022-07-21 09:35:16,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 145 states have (on average 1.2413793103448276) internal successors, (180), 147 states have internal predecessors, (180), 39 states have call successors, (39), 17 states have call predecessors, (39), 16 states have return successors, (46), 36 states have call predecessors, (46), 38 states have call successors, (46) [2022-07-21 09:35:16,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 265 transitions. [2022-07-21 09:35:16,960 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 265 transitions. Word has length 103 [2022-07-21 09:35:16,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:35:16,960 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 265 transitions. [2022-07-21 09:35:16,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-21 09:35:16,961 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 265 transitions. [2022-07-21 09:35:16,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-07-21 09:35:16,962 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:35:16,962 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:35:16,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 09:35:17,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:35:17,188 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:35:17,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:35:17,188 INFO L85 PathProgramCache]: Analyzing trace with hash -974393564, now seen corresponding path program 1 times [2022-07-21 09:35:17,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:35:17,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751998617] [2022-07-21 09:35:17,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:35:17,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:35:17,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:17,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:35:17,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:17,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:35:17,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:17,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:35:17,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:17,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-21 09:35:17,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:17,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:35:17,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:17,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-21 09:35:17,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:17,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-21 09:35:17,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:17,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-07-21 09:35:17,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:17,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-21 09:35:17,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:17,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-21 09:35:17,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:17,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-21 09:35:17,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:17,503 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-07-21 09:35:17,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:35:17,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751998617] [2022-07-21 09:35:17,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751998617] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:35:17,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260255324] [2022-07-21 09:35:17,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:35:17,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:35:17,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:35:17,506 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:35:17,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 09:35:17,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:17,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 09:35:17,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:35:18,004 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-21 09:35:18,005 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:35:18,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260255324] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:35:18,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:35:18,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 11 [2022-07-21 09:35:18,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815647380] [2022-07-21 09:35:18,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:35:18,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 09:35:18,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:35:18,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 09:35:18,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-07-21 09:35:18,008 INFO L87 Difference]: Start difference. First operand 201 states and 265 transitions. Second operand has 9 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-21 09:35:18,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:35:18,131 INFO L93 Difference]: Finished difference Result 355 states and 473 transitions. [2022-07-21 09:35:18,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 09:35:18,132 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 107 [2022-07-21 09:35:18,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:35:18,133 INFO L225 Difference]: With dead ends: 355 [2022-07-21 09:35:18,133 INFO L226 Difference]: Without dead ends: 211 [2022-07-21 09:35:18,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-07-21 09:35:18,134 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 12 mSDsluCounter, 1085 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1248 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 09:35:18,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 1248 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 09:35:18,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-07-21 09:35:18,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2022-07-21 09:35:18,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 153 states have (on average 1.2287581699346406) internal successors, (188), 157 states have internal predecessors, (188), 39 states have call successors, (39), 17 states have call predecessors, (39), 18 states have return successors, (52), 36 states have call predecessors, (52), 38 states have call successors, (52) [2022-07-21 09:35:18,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 279 transitions. [2022-07-21 09:35:18,147 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 279 transitions. Word has length 107 [2022-07-21 09:35:18,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:35:18,147 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 279 transitions. [2022-07-21 09:35:18,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-21 09:35:18,147 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 279 transitions. [2022-07-21 09:35:18,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-21 09:35:18,149 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:35:18,149 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-21 09:35:18,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 09:35:18,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:35:18,364 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:35:18,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:35:18,364 INFO L85 PathProgramCache]: Analyzing trace with hash 751934025, now seen corresponding path program 1 times [2022-07-21 09:35:18,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:35:18,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275032804] [2022-07-21 09:35:18,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:35:18,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:35:18,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:18,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:35:18,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:18,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:35:18,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:18,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:35:18,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:18,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-21 09:35:18,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:18,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:35:18,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:18,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-21 09:35:18,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:18,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-21 09:35:18,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:18,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-21 09:35:18,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:18,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-21 09:35:18,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:18,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-07-21 09:35:18,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:18,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-21 09:35:18,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:18,585 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-07-21 09:35:18,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:35:18,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275032804] [2022-07-21 09:35:18,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275032804] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:35:18,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641273592] [2022-07-21 09:35:18,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:35:18,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:35:18,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:35:18,587 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:35:18,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 09:35:18,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:18,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 2633 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 09:35:18,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:35:18,986 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-21 09:35:18,986 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:35:18,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641273592] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:35:18,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:35:18,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-07-21 09:35:18,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586785935] [2022-07-21 09:35:18,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:35:18,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 09:35:18,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:35:18,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 09:35:18,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:35:18,990 INFO L87 Difference]: Start difference. First operand 211 states and 279 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-21 09:35:19,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:35:19,024 INFO L93 Difference]: Finished difference Result 382 states and 518 transitions. [2022-07-21 09:35:19,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 09:35:19,024 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 109 [2022-07-21 09:35:19,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:35:19,026 INFO L225 Difference]: With dead ends: 382 [2022-07-21 09:35:19,026 INFO L226 Difference]: Without dead ends: 221 [2022-07-21 09:35:19,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-21 09:35:19,029 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 9 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 09:35:19,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 480 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 09:35:19,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-07-21 09:35:19,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 215. [2022-07-21 09:35:19,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 157 states have (on average 1.2229299363057324) internal successors, (192), 161 states have internal predecessors, (192), 39 states have call successors, (39), 17 states have call predecessors, (39), 18 states have return successors, (52), 36 states have call predecessors, (52), 38 states have call successors, (52) [2022-07-21 09:35:19,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 283 transitions. [2022-07-21 09:35:19,046 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 283 transitions. Word has length 109 [2022-07-21 09:35:19,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:35:19,047 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 283 transitions. [2022-07-21 09:35:19,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-21 09:35:19,047 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 283 transitions. [2022-07-21 09:35:19,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-21 09:35:19,049 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:35:19,049 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-21 09:35:19,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 09:35:19,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:35:19,264 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:35:19,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:35:19,264 INFO L85 PathProgramCache]: Analyzing trace with hash -641890850, now seen corresponding path program 3 times [2022-07-21 09:35:19,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:35:19,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123492023] [2022-07-21 09:35:19,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:35:19,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:35:19,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:19,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:35:19,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:19,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:35:19,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:19,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:35:19,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:19,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-21 09:35:19,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:19,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:35:19,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:19,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-21 09:35:19,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:19,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:35:19,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:19,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-21 09:35:19,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:19,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-21 09:35:19,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:19,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-21 09:35:19,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:19,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-21 09:35:19,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:19,580 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-07-21 09:35:19,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:35:19,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123492023] [2022-07-21 09:35:19,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123492023] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:35:19,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099841982] [2022-07-21 09:35:19,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:35:19,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:35:19,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:35:19,583 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:35:19,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 09:35:20,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 09:35:20,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:35:20,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 2544 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-21 09:35:20,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:35:21,623 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 54 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-21 09:35:21,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:35:22,085 INFO L390 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 10 treesize of output 6 [2022-07-21 09:35:22,388 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-21 09:35:22,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099841982] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:35:22,388 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:35:22,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 17, 16] total 35 [2022-07-21 09:35:22,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351527380] [2022-07-21 09:35:22,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:35:22,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-21 09:35:22,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:35:22,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-21 09:35:22,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1098, Unknown=0, NotChecked=0, Total=1190 [2022-07-21 09:35:22,390 INFO L87 Difference]: Start difference. First operand 215 states and 283 transitions. Second operand has 35 states, 29 states have (on average 4.137931034482759) internal successors, (120), 31 states have internal predecessors, (120), 13 states have call successors, (33), 6 states have call predecessors, (33), 9 states have return successors, (29), 9 states have call predecessors, (29), 12 states have call successors, (29) [2022-07-21 09:35:26,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:35:26,418 INFO L93 Difference]: Finished difference Result 435 states and 590 transitions. [2022-07-21 09:35:26,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-21 09:35:26,419 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 29 states have (on average 4.137931034482759) internal successors, (120), 31 states have internal predecessors, (120), 13 states have call successors, (33), 6 states have call predecessors, (33), 9 states have return successors, (29), 9 states have call predecessors, (29), 12 states have call successors, (29) Word has length 103 [2022-07-21 09:35:26,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:35:26,420 INFO L225 Difference]: With dead ends: 435 [2022-07-21 09:35:26,421 INFO L226 Difference]: Without dead ends: 287 [2022-07-21 09:35:26,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 204 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=570, Invalid=4832, Unknown=0, NotChecked=0, Total=5402 [2022-07-21 09:35:26,424 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 520 mSDsluCounter, 1022 mSDsCounter, 0 mSdLazyCounter, 3299 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 1163 SdHoareTripleChecker+Invalid, 3759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 3299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-21 09:35:26,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [541 Valid, 1163 Invalid, 3759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 3299 Invalid, 0 Unknown, 222 Unchecked, 2.8s Time] [2022-07-21 09:35:26,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-07-21 09:35:26,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 253. [2022-07-21 09:35:26,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 189 states have (on average 1.1904761904761905) internal successors, (225), 194 states have internal predecessors, (225), 42 states have call successors, (42), 19 states have call predecessors, (42), 21 states have return successors, (67), 39 states have call predecessors, (67), 41 states have call successors, (67) [2022-07-21 09:35:26,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 334 transitions. [2022-07-21 09:35:26,440 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 334 transitions. Word has length 103 [2022-07-21 09:35:26,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:35:26,441 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 334 transitions. [2022-07-21 09:35:26,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 29 states have (on average 4.137931034482759) internal successors, (120), 31 states have internal predecessors, (120), 13 states have call successors, (33), 6 states have call predecessors, (33), 9 states have return successors, (29), 9 states have call predecessors, (29), 12 states have call successors, (29) [2022-07-21 09:35:26,441 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 334 transitions. [2022-07-21 09:35:26,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-21 09:35:26,443 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:35:26,443 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 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] [2022-07-21 09:35:26,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-21 09:35:26,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-21 09:35:26,668 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:35:26,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:35:26,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1113198922, now seen corresponding path program 1 times [2022-07-21 09:35:26,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:35:26,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157567412] [2022-07-21 09:35:26,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:35:26,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:35:26,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:26,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:35:26,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:26,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:35:26,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:26,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:35:26,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:26,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-21 09:35:26,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:26,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:35:26,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:26,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-21 09:35:26,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:26,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-21 09:35:26,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:26,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-21 09:35:26,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:26,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-07-21 09:35:26,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:26,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-21 09:35:26,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:26,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-07-21 09:35:26,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:26,855 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-21 09:35:26,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:35:26,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157567412] [2022-07-21 09:35:26,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157567412] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:35:26,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129682494] [2022-07-21 09:35:26,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:35:26,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:35:26,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:35:26,858 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:35:26,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 09:35:27,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:27,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 2652 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 09:35:27,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:35:27,328 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-07-21 09:35:27,328 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:35:27,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129682494] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:35:27,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:35:27,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-07-21 09:35:27,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640868098] [2022-07-21 09:35:27,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:35:27,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 09:35:27,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:35:27,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 09:35:27,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:35:27,330 INFO L87 Difference]: Start difference. First operand 253 states and 334 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-21 09:35:27,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:35:27,359 INFO L93 Difference]: Finished difference Result 476 states and 642 transitions. [2022-07-21 09:35:27,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 09:35:27,359 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 111 [2022-07-21 09:35:27,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:35:27,361 INFO L225 Difference]: With dead ends: 476 [2022-07-21 09:35:27,361 INFO L226 Difference]: Without dead ends: 247 [2022-07-21 09:35:27,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-21 09:35:27,363 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 32 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 09:35:27,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 483 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 09:35:27,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-07-21 09:35:27,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 235. [2022-07-21 09:35:27,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 172 states have (on average 1.1686046511627908) internal successors, (201), 176 states have internal predecessors, (201), 42 states have call successors, (42), 19 states have call predecessors, (42), 20 states have return successors, (57), 39 states have call predecessors, (57), 41 states have call successors, (57) [2022-07-21 09:35:27,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 300 transitions. [2022-07-21 09:35:27,377 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 300 transitions. Word has length 111 [2022-07-21 09:35:27,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:35:27,377 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 300 transitions. [2022-07-21 09:35:27,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-21 09:35:27,378 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 300 transitions. [2022-07-21 09:35:27,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-07-21 09:35:27,379 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:35:27,379 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-21 09:35:27,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 09:35:27,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:35:27,595 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:35:27,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:35:27,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1071215349, now seen corresponding path program 1 times [2022-07-21 09:35:27,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:35:27,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246651069] [2022-07-21 09:35:27,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:35:27,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:35:27,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:27,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:35:27,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:28,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:35:28,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:28,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:35:28,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:28,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-21 09:35:28,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:28,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:35:28,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:28,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-21 09:35:28,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:28,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:35:28,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:28,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-21 09:35:28,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:28,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-21 09:35:28,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:28,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-07-21 09:35:28,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:28,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-07-21 09:35:28,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:28,202 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-21 09:35:28,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:35:28,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246651069] [2022-07-21 09:35:28,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246651069] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:35:28,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307440960] [2022-07-21 09:35:28,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:35:28,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:35:28,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:35:28,205 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:35:28,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 09:35:28,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:28,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-21 09:35:28,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:35:28,749 INFO L390 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 [2022-07-21 09:35:29,392 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 61 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-21 09:35:29,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:35:29,882 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-21 09:35:29,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307440960] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:35:29,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:35:29,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 12] total 40 [2022-07-21 09:35:29,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900705581] [2022-07-21 09:35:29,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:35:29,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-21 09:35:29,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:35:29,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-21 09:35:29,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1445, Unknown=0, NotChecked=0, Total=1560 [2022-07-21 09:35:29,885 INFO L87 Difference]: Start difference. First operand 235 states and 300 transitions. Second operand has 40 states, 37 states have (on average 3.918918918918919) internal successors, (145), 33 states have internal predecessors, (145), 13 states have call successors, (32), 7 states have call predecessors, (32), 9 states have return successors, (28), 12 states have call predecessors, (28), 12 states have call successors, (28) [2022-07-21 09:35:35,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:35:35,419 INFO L93 Difference]: Finished difference Result 569 states and 773 transitions. [2022-07-21 09:35:35,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-21 09:35:35,420 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 37 states have (on average 3.918918918918919) internal successors, (145), 33 states have internal predecessors, (145), 13 states have call successors, (32), 7 states have call predecessors, (32), 9 states have return successors, (28), 12 states have call predecessors, (28), 12 states have call successors, (28) Word has length 105 [2022-07-21 09:35:35,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:35:35,423 INFO L225 Difference]: With dead ends: 569 [2022-07-21 09:35:35,423 INFO L226 Difference]: Without dead ends: 392 [2022-07-21 09:35:35,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 215 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1577 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=580, Invalid=6226, Unknown=0, NotChecked=0, Total=6806 [2022-07-21 09:35:35,426 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 558 mSDsluCounter, 1043 mSDsCounter, 0 mSdLazyCounter, 5033 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 1221 SdHoareTripleChecker+Invalid, 5976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 5033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 598 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-07-21 09:35:35,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 1221 Invalid, 5976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 5033 Invalid, 0 Unknown, 598 Unchecked, 4.0s Time] [2022-07-21 09:35:35,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-07-21 09:35:35,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 337. [2022-07-21 09:35:35,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 244 states have (on average 1.151639344262295) internal successors, (281), 250 states have internal predecessors, (281), 67 states have call successors, (67), 22 states have call predecessors, (67), 25 states have return successors, (97), 64 states have call predecessors, (97), 66 states have call successors, (97) [2022-07-21 09:35:35,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 445 transitions. [2022-07-21 09:35:35,454 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 445 transitions. Word has length 105 [2022-07-21 09:35:35,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:35:35,454 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 445 transitions. [2022-07-21 09:35:35,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 37 states have (on average 3.918918918918919) internal successors, (145), 33 states have internal predecessors, (145), 13 states have call successors, (32), 7 states have call predecessors, (32), 9 states have return successors, (28), 12 states have call predecessors, (28), 12 states have call successors, (28) [2022-07-21 09:35:35,455 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 445 transitions. [2022-07-21 09:35:35,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-07-21 09:35:35,456 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:35:35,457 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-21 09:35:35,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-07-21 09:35:35,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-21 09:35:35,667 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:35:35,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:35:35,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1276007353, now seen corresponding path program 1 times [2022-07-21 09:35:35,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:35:35,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390743187] [2022-07-21 09:35:35,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:35:35,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:35:35,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:36,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:35:36,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:36,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:35:36,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:36,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:35:36,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:36,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-21 09:35:36,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:36,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:35:36,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:36,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-21 09:35:36,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:36,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:35:36,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:36,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-21 09:35:36,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:36,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-21 09:35:36,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:36,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-07-21 09:35:36,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:36,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-07-21 09:35:36,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:36,190 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-21 09:35:36,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:35:36,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390743187] [2022-07-21 09:35:36,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390743187] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:35:36,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543531872] [2022-07-21 09:35:36,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:35:36,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:35:36,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:35:36,193 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:35:36,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 09:35:36,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:36,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-21 09:35:36,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:35:36,662 INFO L390 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 [2022-07-21 09:35:37,153 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 48 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-21 09:35:37,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:35:37,500 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-21 09:35:37,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543531872] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:35:37,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:35:37,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 9] total 29 [2022-07-21 09:35:37,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559422086] [2022-07-21 09:35:37,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:35:37,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-21 09:35:37,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:35:37,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-21 09:35:37,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2022-07-21 09:35:37,504 INFO L87 Difference]: Start difference. First operand 337 states and 445 transitions. Second operand has 29 states, 27 states have (on average 5.0) internal successors, (135), 26 states have internal predecessors, (135), 9 states have call successors, (31), 5 states have call predecessors, (31), 7 states have return successors, (26), 7 states have call predecessors, (26), 9 states have call successors, (26) [2022-07-21 09:35:39,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:35:39,638 INFO L93 Difference]: Finished difference Result 549 states and 716 transitions. [2022-07-21 09:35:39,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-21 09:35:39,639 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 5.0) internal successors, (135), 26 states have internal predecessors, (135), 9 states have call successors, (31), 5 states have call predecessors, (31), 7 states have return successors, (26), 7 states have call predecessors, (26), 9 states have call successors, (26) Word has length 105 [2022-07-21 09:35:39,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:35:39,641 INFO L225 Difference]: With dead ends: 549 [2022-07-21 09:35:39,641 INFO L226 Difference]: Without dead ends: 351 [2022-07-21 09:35:39,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 220 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=353, Invalid=2509, Unknown=0, NotChecked=0, Total=2862 [2022-07-21 09:35:39,643 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 323 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 2041 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 999 SdHoareTripleChecker+Invalid, 2556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 2041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 370 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-21 09:35:39,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 999 Invalid, 2556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 2041 Invalid, 0 Unknown, 370 Unchecked, 1.6s Time] [2022-07-21 09:35:39,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-07-21 09:35:39,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 337. [2022-07-21 09:35:39,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 243 states have (on average 1.1440329218106995) internal successors, (278), 249 states have internal predecessors, (278), 67 states have call successors, (67), 21 states have call predecessors, (67), 26 states have return successors, (101), 66 states have call predecessors, (101), 66 states have call successors, (101) [2022-07-21 09:35:39,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 446 transitions. [2022-07-21 09:35:39,669 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 446 transitions. Word has length 105 [2022-07-21 09:35:39,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:35:39,670 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 446 transitions. [2022-07-21 09:35:39,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 5.0) internal successors, (135), 26 states have internal predecessors, (135), 9 states have call successors, (31), 5 states have call predecessors, (31), 7 states have return successors, (26), 7 states have call predecessors, (26), 9 states have call successors, (26) [2022-07-21 09:35:39,670 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 446 transitions. [2022-07-21 09:35:39,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-07-21 09:35:39,671 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:35:39,671 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-21 09:35:39,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-21 09:35:39,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-21 09:35:39,904 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:35:39,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:35:39,904 INFO L85 PathProgramCache]: Analyzing trace with hash 150904329, now seen corresponding path program 1 times [2022-07-21 09:35:39,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:35:39,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9093434] [2022-07-21 09:35:39,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:35:39,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:35:40,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:40,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:35:40,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:40,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:35:40,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:40,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:35:40,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:40,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-21 09:35:40,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:40,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:35:40,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:40,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-21 09:35:40,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:40,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-21 09:35:40,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:40,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-21 09:35:40,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:40,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-21 09:35:40,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:40,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-07-21 09:35:40,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:40,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-07-21 09:35:40,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:40,325 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-07-21 09:35:40,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:35:40,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9093434] [2022-07-21 09:35:40,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9093434] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:35:40,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166966302] [2022-07-21 09:35:40,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:35:40,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:35:40,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:35:40,328 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:35:40,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-21 09:35:40,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:40,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 2633 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-21 09:35:40,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:35:40,863 INFO L390 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 [2022-07-21 09:35:41,382 INFO L390 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 16 treesize of output 8 [2022-07-21 09:35:41,385 INFO L390 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 [2022-07-21 09:35:41,420 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-21 09:35:41,421 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:35:41,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166966302] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:35:41,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:35:41,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [12] total 25 [2022-07-21 09:35:41,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343833593] [2022-07-21 09:35:41,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:35:41,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-21 09:35:41,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:35:41,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-21 09:35:41,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-07-21 09:35:41,423 INFO L87 Difference]: Start difference. First operand 337 states and 446 transitions. Second operand has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 11 states have internal predecessors, (65), 6 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2022-07-21 09:35:41,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:35:41,838 INFO L93 Difference]: Finished difference Result 578 states and 756 transitions. [2022-07-21 09:35:41,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 09:35:41,838 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 11 states have internal predecessors, (65), 6 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 105 [2022-07-21 09:35:41,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:35:41,840 INFO L225 Difference]: With dead ends: 578 [2022-07-21 09:35:41,840 INFO L226 Difference]: Without dead ends: 339 [2022-07-21 09:35:41,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2022-07-21 09:35:41,842 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 94 mSDsluCounter, 1179 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 1367 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 09:35:41,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 1367 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 321 Invalid, 0 Unknown, 178 Unchecked, 0.3s Time] [2022-07-21 09:35:41,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-07-21 09:35:41,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 333. [2022-07-21 09:35:41,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 239 states have (on average 1.1422594142259415) internal successors, (273), 247 states have internal predecessors, (273), 64 states have call successors, (64), 23 states have call predecessors, (64), 29 states have return successors, (94), 62 states have call predecessors, (94), 62 states have call successors, (94) [2022-07-21 09:35:41,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 431 transitions. [2022-07-21 09:35:41,866 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 431 transitions. Word has length 105 [2022-07-21 09:35:41,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:35:41,866 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 431 transitions. [2022-07-21 09:35:41,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 11 states have internal predecessors, (65), 6 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2022-07-21 09:35:41,867 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 431 transitions. [2022-07-21 09:35:41,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-21 09:35:41,868 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:35:41,868 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-21 09:35:41,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-21 09:35:42,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-21 09:35:42,083 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:35:42,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:35:42,084 INFO L85 PathProgramCache]: Analyzing trace with hash -2056242484, now seen corresponding path program 1 times [2022-07-21 09:35:42,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:35:42,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715925855] [2022-07-21 09:35:42,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:35:42,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:35:42,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:42,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:35:42,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:42,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:35:42,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:42,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:35:42,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:42,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-21 09:35:42,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:42,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:35:42,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:42,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-21 09:35:42,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:42,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-21 09:35:42,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:42,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-07-21 09:35:42,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:42,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-21 09:35:42,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:42,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-21 09:35:42,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:42,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-07-21 09:35:42,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:42,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-07-21 09:35:42,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:42,848 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-21 09:35:42,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:35:42,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715925855] [2022-07-21 09:35:42,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715925855] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:35:42,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:35:42,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-07-21 09:35:42,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428988969] [2022-07-21 09:35:42,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:35:42,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-21 09:35:42,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:35:42,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-21 09:35:42,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2022-07-21 09:35:42,851 INFO L87 Difference]: Start difference. First operand 333 states and 431 transitions. Second operand has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 18 states have internal predecessors, (61), 9 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2022-07-21 09:35:44,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:35:44,863 INFO L93 Difference]: Finished difference Result 563 states and 767 transitions. [2022-07-21 09:35:44,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 09:35:44,864 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 18 states have internal predecessors, (61), 9 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 112 [2022-07-21 09:35:44,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:35:44,865 INFO L225 Difference]: With dead ends: 563 [2022-07-21 09:35:44,866 INFO L226 Difference]: Without dead ends: 362 [2022-07-21 09:35:44,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2022-07-21 09:35:44,867 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 281 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 2282 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 2484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 2282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-21 09:35:44,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 746 Invalid, 2484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 2282 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-21 09:35:44,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-07-21 09:35:44,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 349. [2022-07-21 09:35:44,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 241 states have (on average 1.1742738589211619) internal successors, (283), 249 states have internal predecessors, (283), 82 states have call successors, (82), 20 states have call predecessors, (82), 25 states have return successors, (108), 79 states have call predecessors, (108), 80 states have call successors, (108) [2022-07-21 09:35:44,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 473 transitions. [2022-07-21 09:35:44,913 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 473 transitions. Word has length 112 [2022-07-21 09:35:44,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:35:44,913 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 473 transitions. [2022-07-21 09:35:44,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 18 states have internal predecessors, (61), 9 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2022-07-21 09:35:44,914 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 473 transitions. [2022-07-21 09:35:44,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-21 09:35:44,916 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:35:44,916 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-21 09:35:44,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-21 09:35:44,916 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:35:44,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:35:44,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1012760702, now seen corresponding path program 1 times [2022-07-21 09:35:44,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:35:44,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434764521] [2022-07-21 09:35:44,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:35:44,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:35:45,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:45,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:35:45,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:45,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:35:45,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:45,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:35:45,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:45,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-21 09:35:45,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:45,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:35:45,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:45,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-21 09:35:45,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:45,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-21 09:35:45,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:45,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-21 09:35:45,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:45,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-07-21 09:35:45,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:45,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-21 09:35:45,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:45,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-07-21 09:35:45,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:45,336 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 30 proven. 7 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-07-21 09:35:45,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:35:45,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434764521] [2022-07-21 09:35:45,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434764521] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:35:45,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748043672] [2022-07-21 09:35:45,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:35:45,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:35:45,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:35:45,340 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:35:45,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-21 09:35:45,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:45,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 2634 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-21 09:35:45,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:35:46,852 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 47 proven. 23 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-21 09:35:46,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:35:47,502 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-21 09:35:47,503 INFO L390 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 39 treesize of output 1 [2022-07-21 09:35:47,634 INFO L356 Elim1Store]: treesize reduction 18, result has 48.6 percent of original size [2022-07-21 09:35:47,635 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 36 [2022-07-21 09:35:47,752 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 14 proven. 30 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-21 09:35:47,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748043672] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:35:47,753 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:35:47,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 14] total 36 [2022-07-21 09:35:47,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057647764] [2022-07-21 09:35:47,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:35:47,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-21 09:35:47,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:35:47,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-21 09:35:47,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2022-07-21 09:35:47,755 INFO L87 Difference]: Start difference. First operand 349 states and 473 transitions. Second operand has 36 states, 36 states have (on average 4.305555555555555) internal successors, (155), 33 states have internal predecessors, (155), 8 states have call successors, (30), 6 states have call predecessors, (30), 7 states have return successors, (25), 8 states have call predecessors, (25), 7 states have call successors, (25) [2022-07-21 09:35:51,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:35:51,024 INFO L93 Difference]: Finished difference Result 579 states and 789 transitions. [2022-07-21 09:35:51,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-21 09:35:51,025 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.305555555555555) internal successors, (155), 33 states have internal predecessors, (155), 8 states have call successors, (30), 6 states have call predecessors, (30), 7 states have return successors, (25), 8 states have call predecessors, (25), 7 states have call successors, (25) Word has length 111 [2022-07-21 09:35:51,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:35:51,027 INFO L225 Difference]: With dead ends: 579 [2022-07-21 09:35:51,027 INFO L226 Difference]: Without dead ends: 388 [2022-07-21 09:35:51,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 219 SyntacticMatches, 9 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1229 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=590, Invalid=3832, Unknown=0, NotChecked=0, Total=4422 [2022-07-21 09:35:51,030 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 199 mSDsluCounter, 1065 mSDsCounter, 0 mSdLazyCounter, 1842 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 1225 SdHoareTripleChecker+Invalid, 2573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 658 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-21 09:35:51,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 1225 Invalid, 2573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1842 Invalid, 0 Unknown, 658 Unchecked, 1.8s Time] [2022-07-21 09:35:51,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-07-21 09:35:51,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 382. [2022-07-21 09:35:51,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 268 states have (on average 1.171641791044776) internal successors, (314), 277 states have internal predecessors, (314), 85 states have call successors, (85), 22 states have call predecessors, (85), 28 states have return successors, (118), 82 states have call predecessors, (118), 83 states have call successors, (118) [2022-07-21 09:35:51,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 517 transitions. [2022-07-21 09:35:51,066 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 517 transitions. Word has length 111 [2022-07-21 09:35:51,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:35:51,067 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 517 transitions. [2022-07-21 09:35:51,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.305555555555555) internal successors, (155), 33 states have internal predecessors, (155), 8 states have call successors, (30), 6 states have call predecessors, (30), 7 states have return successors, (25), 8 states have call predecessors, (25), 7 states have call successors, (25) [2022-07-21 09:35:51,067 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 517 transitions. [2022-07-21 09:35:51,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-21 09:35:51,069 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:35:51,069 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-21 09:35:51,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-21 09:35:51,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-21 09:35:51,283 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:35:51,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:35:51,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1270926140, now seen corresponding path program 1 times [2022-07-21 09:35:51,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:35:51,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682875022] [2022-07-21 09:35:51,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:35:51,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:35:51,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:51,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:35:51,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:51,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:35:51,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:51,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:35:51,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:51,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-21 09:35:51,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:51,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:35:51,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:51,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-21 09:35:51,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:51,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-21 09:35:51,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:51,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-21 09:35:51,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:51,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-07-21 09:35:51,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:51,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-21 09:35:51,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:51,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-07-21 09:35:51,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:51,548 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-21 09:35:51,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:35:51,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682875022] [2022-07-21 09:35:51,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682875022] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:35:51,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:35:51,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 09:35:51,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594402957] [2022-07-21 09:35:51,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:35:51,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 09:35:51,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:35:51,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 09:35:51,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 09:35:51,551 INFO L87 Difference]: Start difference. First operand 382 states and 517 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2022-07-21 09:35:51,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:35:51,955 INFO L93 Difference]: Finished difference Result 602 states and 839 transitions. [2022-07-21 09:35:51,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 09:35:51,956 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (12), 3 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 111 [2022-07-21 09:35:51,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:35:51,958 INFO L225 Difference]: With dead ends: 602 [2022-07-21 09:35:51,958 INFO L226 Difference]: Without dead ends: 375 [2022-07-21 09:35:51,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-21 09:35:51,959 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 92 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 09:35:51,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 309 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 09:35:51,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-07-21 09:35:51,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 375. [2022-07-21 09:35:51,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 262 states have (on average 1.16793893129771) internal successors, (306), 270 states have internal predecessors, (306), 85 states have call successors, (85), 22 states have call predecessors, (85), 27 states have return successors, (110), 82 states have call predecessors, (110), 83 states have call successors, (110) [2022-07-21 09:35:51,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 501 transitions. [2022-07-21 09:35:51,994 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 501 transitions. Word has length 111 [2022-07-21 09:35:51,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:35:51,995 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 501 transitions. [2022-07-21 09:35:51,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2022-07-21 09:35:51,995 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 501 transitions. [2022-07-21 09:35:51,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-21 09:35:51,996 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:35:51,996 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:35:51,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-21 09:35:51,997 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:35:51,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:35:51,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1395663453, now seen corresponding path program 1 times [2022-07-21 09:35:51,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:35:51,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705326970] [2022-07-21 09:35:51,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:35:51,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:35:52,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:52,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:35:52,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:52,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:35:52,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:52,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:35:52,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:52,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-21 09:35:52,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:52,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:35:52,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:52,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-21 09:35:52,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:52,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-21 09:35:52,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:52,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-21 09:35:52,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:52,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-07-21 09:35:52,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:52,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-21 09:35:52,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:52,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-07-21 09:35:52,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:52,250 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-21 09:35:52,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:35:52,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705326970] [2022-07-21 09:35:52,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705326970] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:35:52,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:35:52,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-21 09:35:52,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025599745] [2022-07-21 09:35:52,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:35:52,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 09:35:52,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:35:52,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 09:35:52,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-07-21 09:35:52,253 INFO L87 Difference]: Start difference. First operand 375 states and 501 transitions. Second operand has 11 states, 10 states have (on average 4.8) internal successors, (48), 8 states have internal predecessors, (48), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2022-07-21 09:35:53,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:35:53,070 INFO L93 Difference]: Finished difference Result 387 states and 515 transitions. [2022-07-21 09:35:53,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 09:35:53,071 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.8) internal successors, (48), 8 states have internal predecessors, (48), 2 states have call successors, (12), 3 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 113 [2022-07-21 09:35:53,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:35:53,073 INFO L225 Difference]: With dead ends: 387 [2022-07-21 09:35:53,073 INFO L226 Difference]: Without dead ends: 385 [2022-07-21 09:35:53,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:35:53,075 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 89 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 09:35:53,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 719 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 849 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-21 09:35:53,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-07-21 09:35:53,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 380. [2022-07-21 09:35:53,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 265 states have (on average 1.1660377358490566) internal successors, (309), 273 states have internal predecessors, (309), 86 states have call successors, (86), 23 states have call predecessors, (86), 28 states have return successors, (111), 83 states have call predecessors, (111), 84 states have call successors, (111) [2022-07-21 09:35:53,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 506 transitions. [2022-07-21 09:35:53,147 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 506 transitions. Word has length 113 [2022-07-21 09:35:53,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:35:53,150 INFO L495 AbstractCegarLoop]: Abstraction has 380 states and 506 transitions. [2022-07-21 09:35:53,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.8) internal successors, (48), 8 states have internal predecessors, (48), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2022-07-21 09:35:53,150 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 506 transitions. [2022-07-21 09:35:53,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-07-21 09:35:53,152 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:35:53,152 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:35:53,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-21 09:35:53,153 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:35:53,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:35:53,153 INFO L85 PathProgramCache]: Analyzing trace with hash -636491906, now seen corresponding path program 1 times [2022-07-21 09:35:53,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:35:53,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085737436] [2022-07-21 09:35:53,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:35:53,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:35:53,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:53,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:35:53,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:53,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:35:53,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:53,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:35:53,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:53,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-21 09:35:53,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:53,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:35:53,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:53,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-21 09:35:53,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:53,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-21 09:35:53,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:53,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-21 09:35:53,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:53,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-07-21 09:35:53,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:53,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-21 09:35:53,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:53,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-07-21 09:35:53,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:53,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-07-21 09:35:53,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:53,457 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-07-21 09:35:53,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:35:53,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085737436] [2022-07-21 09:35:53,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085737436] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:35:53,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:35:53,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 09:35:53,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558950052] [2022-07-21 09:35:53,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:35:53,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 09:35:53,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:35:53,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 09:35:53,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-07-21 09:35:53,461 INFO L87 Difference]: Start difference. First operand 380 states and 506 transitions. Second operand has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2022-07-21 09:35:54,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:35:54,342 INFO L93 Difference]: Finished difference Result 397 states and 527 transitions. [2022-07-21 09:35:54,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 09:35:54,343 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 114 [2022-07-21 09:35:54,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:35:54,346 INFO L225 Difference]: With dead ends: 397 [2022-07-21 09:35:54,346 INFO L226 Difference]: Without dead ends: 395 [2022-07-21 09:35:54,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-07-21 09:35:54,347 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 142 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-21 09:35:54,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 562 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-21 09:35:54,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-07-21 09:35:54,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 389. [2022-07-21 09:35:54,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 271 states have (on average 1.1623616236162362) internal successors, (315), 280 states have internal predecessors, (315), 87 states have call successors, (87), 24 states have call predecessors, (87), 30 states have return successors, (115), 84 states have call predecessors, (115), 85 states have call successors, (115) [2022-07-21 09:35:54,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 517 transitions. [2022-07-21 09:35:54,383 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 517 transitions. Word has length 114 [2022-07-21 09:35:54,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:35:54,383 INFO L495 AbstractCegarLoop]: Abstraction has 389 states and 517 transitions. [2022-07-21 09:35:54,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2022-07-21 09:35:54,384 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 517 transitions. [2022-07-21 09:35:54,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-07-21 09:35:54,385 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:35:54,385 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:35:54,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-21 09:35:54,386 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:35:54,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:35:54,386 INFO L85 PathProgramCache]: Analyzing trace with hash -499981303, now seen corresponding path program 1 times [2022-07-21 09:35:54,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:35:54,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386482334] [2022-07-21 09:35:54,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:35:54,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:35:54,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:54,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:35:54,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:54,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:35:54,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:54,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:35:54,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:54,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-21 09:35:54,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:54,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:35:54,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:54,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-21 09:35:54,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:54,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-21 09:35:54,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:54,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-07-21 09:35:54,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:54,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-21 09:35:54,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:54,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-07-21 09:35:54,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:54,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-07-21 09:35:54,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:54,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-07-21 09:35:54,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:54,892 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 9 proven. 36 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-07-21 09:35:54,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:35:54,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386482334] [2022-07-21 09:35:54,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386482334] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:35:54,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688839378] [2022-07-21 09:35:54,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:35:54,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:35:54,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:35:54,896 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:35:54,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-21 09:35:55,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:55,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 2679 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-21 09:35:55,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:35:55,504 INFO L390 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 15 [2022-07-21 09:35:55,518 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-21 09:35:55,518 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:35:55,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688839378] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:35:55,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:35:55,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 17 [2022-07-21 09:35:55,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809180017] [2022-07-21 09:35:55,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:35:55,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 09:35:55,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:35:55,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 09:35:55,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2022-07-21 09:35:55,520 INFO L87 Difference]: Start difference. First operand 389 states and 517 transitions. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 8 states have internal predecessors, (67), 4 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-07-21 09:35:55,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:35:55,990 INFO L93 Difference]: Finished difference Result 546 states and 716 transitions. [2022-07-21 09:35:55,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 09:35:55,991 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 8 states have internal predecessors, (67), 4 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 118 [2022-07-21 09:35:55,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:35:55,993 INFO L225 Difference]: With dead ends: 546 [2022-07-21 09:35:55,994 INFO L226 Difference]: Without dead ends: 354 [2022-07-21 09:35:55,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 135 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-07-21 09:35:55,995 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 105 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 979 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 09:35:55,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 979 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 259 Invalid, 0 Unknown, 61 Unchecked, 0.3s Time] [2022-07-21 09:35:55,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-07-21 09:35:56,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 352. [2022-07-21 09:35:56,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 249 states have (on average 1.1485943775100402) internal successors, (286), 257 states have internal predecessors, (286), 72 states have call successors, (72), 24 states have call predecessors, (72), 30 states have return successors, (96), 70 states have call predecessors, (96), 70 states have call successors, (96) [2022-07-21 09:35:56,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 454 transitions. [2022-07-21 09:35:56,025 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 454 transitions. Word has length 118 [2022-07-21 09:35:56,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:35:56,026 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 454 transitions. [2022-07-21 09:35:56,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 8 states have internal predecessors, (67), 4 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-07-21 09:35:56,026 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 454 transitions. [2022-07-21 09:35:56,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-07-21 09:35:56,028 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:35:56,028 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-21 09:35:56,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-21 09:35:56,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:35:56,256 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:35:56,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:35:56,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1717649095, now seen corresponding path program 1 times [2022-07-21 09:35:56,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:35:56,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670689542] [2022-07-21 09:35:56,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:35:56,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:35:57,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:57,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:35:57,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:57,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:35:57,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:58,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:35:58,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:58,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-21 09:35:58,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:58,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:35:58,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:58,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-21 09:35:58,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:58,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-21 09:35:58,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:58,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-07-21 09:35:58,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:58,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-21 09:35:58,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:58,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-07-21 09:35:58,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:58,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-07-21 09:35:58,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:58,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-07-21 09:35:58,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:58,426 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-07-21 09:35:58,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:35:58,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670689542] [2022-07-21 09:35:58,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670689542] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:35:58,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128509160] [2022-07-21 09:35:58,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:35:58,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:35:58,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:35:58,432 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:35:58,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-21 09:35:58,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:58,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 2684 conjuncts, 99 conjunts are in the unsatisfiable core [2022-07-21 09:35:58,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:35:58,975 INFO L390 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 [2022-07-21 09:36:01,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:36:01,480 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-07-21 09:36:01,480 INFO L390 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 29 treesize of output 35 [2022-07-21 09:36:01,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:36:01,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:36:01,585 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:36:01,586 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 41 [2022-07-21 09:36:08,599 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 48 proven. 18 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-21 09:36:08,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:36:09,510 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 30 proven. 14 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-07-21 09:36:09,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128509160] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:36:09,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:36:09,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 20, 11] total 53 [2022-07-21 09:36:09,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838989727] [2022-07-21 09:36:09,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:36:09,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-21 09:36:09,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:36:09,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-21 09:36:09,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=2566, Unknown=1, NotChecked=0, Total=2756 [2022-07-21 09:36:09,514 INFO L87 Difference]: Start difference. First operand 352 states and 454 transitions. Second operand has 53 states, 47 states have (on average 3.1702127659574466) internal successors, (149), 44 states have internal predecessors, (149), 20 states have call successors, (36), 6 states have call predecessors, (36), 8 states have return successors, (32), 15 states have call predecessors, (32), 19 states have call successors, (32) [2022-07-21 09:36:15,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:36:15,902 INFO L93 Difference]: Finished difference Result 541 states and 705 transitions. [2022-07-21 09:36:15,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-21 09:36:15,903 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 47 states have (on average 3.1702127659574466) internal successors, (149), 44 states have internal predecessors, (149), 20 states have call successors, (36), 6 states have call predecessors, (36), 8 states have return successors, (32), 15 states have call predecessors, (32), 19 states have call successors, (32) Word has length 118 [2022-07-21 09:36:15,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:36:15,905 INFO L225 Difference]: With dead ends: 541 [2022-07-21 09:36:15,905 INFO L226 Difference]: Without dead ends: 366 [2022-07-21 09:36:15,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 234 SyntacticMatches, 10 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2423 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=674, Invalid=8067, Unknown=1, NotChecked=0, Total=8742 [2022-07-21 09:36:15,909 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 267 mSDsluCounter, 1366 mSDsCounter, 0 mSdLazyCounter, 4857 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 1503 SdHoareTripleChecker+Invalid, 5524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 4857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 551 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-21 09:36:15,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 1503 Invalid, 5524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 4857 Invalid, 0 Unknown, 551 Unchecked, 4.3s Time] [2022-07-21 09:36:15,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-07-21 09:36:15,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 354. [2022-07-21 09:36:15,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 252 states have (on average 1.1388888888888888) internal successors, (287), 259 states have internal predecessors, (287), 72 states have call successors, (72), 24 states have call predecessors, (72), 29 states have return successors, (91), 70 states have call predecessors, (91), 70 states have call successors, (91) [2022-07-21 09:36:15,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 450 transitions. [2022-07-21 09:36:15,943 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 450 transitions. Word has length 118 [2022-07-21 09:36:15,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:36:15,943 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 450 transitions. [2022-07-21 09:36:15,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 47 states have (on average 3.1702127659574466) internal successors, (149), 44 states have internal predecessors, (149), 20 states have call successors, (36), 6 states have call predecessors, (36), 8 states have return successors, (32), 15 states have call predecessors, (32), 19 states have call successors, (32) [2022-07-21 09:36:15,943 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 450 transitions. [2022-07-21 09:36:15,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-07-21 09:36:15,945 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:36:15,945 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 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, 1, 1, 1, 1] [2022-07-21 09:36:15,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-21 09:36:16,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:36:16,159 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:36:16,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:36:16,160 INFO L85 PathProgramCache]: Analyzing trace with hash -980927395, now seen corresponding path program 1 times [2022-07-21 09:36:16,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:36:16,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946014247] [2022-07-21 09:36:16,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:36:16,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:36:16,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:16,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:36:16,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:16,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:36:16,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:16,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:36:16,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:16,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-21 09:36:16,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:16,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:36:16,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:16,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-21 09:36:16,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:16,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-21 09:36:16,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:16,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-07-21 09:36:16,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:16,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-21 09:36:16,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:16,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-07-21 09:36:16,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:16,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-07-21 09:36:16,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:16,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-07-21 09:36:16,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:16,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-07-21 09:36:16,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:17,096 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-21 09:36:17,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:36:17,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946014247] [2022-07-21 09:36:17,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946014247] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:36:17,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:36:17,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-07-21 09:36:17,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663047148] [2022-07-21 09:36:17,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:36:17,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-21 09:36:17,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:36:17,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-21 09:36:17,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2022-07-21 09:36:17,098 INFO L87 Difference]: Start difference. First operand 354 states and 450 transitions. Second operand has 28 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 21 states have internal predecessors, (63), 10 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 10 states have call predecessors, (12), 8 states have call successors, (12) [2022-07-21 09:36:20,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:36:20,940 INFO L93 Difference]: Finished difference Result 590 states and 798 transitions. [2022-07-21 09:36:20,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-21 09:36:20,940 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 21 states have internal predecessors, (63), 10 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 10 states have call predecessors, (12), 8 states have call successors, (12) Word has length 125 [2022-07-21 09:36:20,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:36:20,944 INFO L225 Difference]: With dead ends: 590 [2022-07-21 09:36:20,944 INFO L226 Difference]: Without dead ends: 433 [2022-07-21 09:36:20,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=244, Invalid=1736, Unknown=0, NotChecked=0, Total=1980 [2022-07-21 09:36:20,946 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 542 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 4128 mSolverCounterSat, 481 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 833 SdHoareTripleChecker+Invalid, 4609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 481 IncrementalHoareTripleChecker+Valid, 4128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-07-21 09:36:20,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [562 Valid, 833 Invalid, 4609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [481 Valid, 4128 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-07-21 09:36:20,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2022-07-21 09:36:20,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 363. [2022-07-21 09:36:20,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 257 states have (on average 1.140077821011673) internal successors, (293), 265 states have internal predecessors, (293), 75 states have call successors, (75), 24 states have call predecessors, (75), 30 states have return successors, (98), 73 states have call predecessors, (98), 73 states have call successors, (98) [2022-07-21 09:36:20,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 466 transitions. [2022-07-21 09:36:20,984 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 466 transitions. Word has length 125 [2022-07-21 09:36:20,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:36:20,984 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 466 transitions. [2022-07-21 09:36:20,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 21 states have internal predecessors, (63), 10 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 10 states have call predecessors, (12), 8 states have call successors, (12) [2022-07-21 09:36:20,985 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 466 transitions. [2022-07-21 09:36:20,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-07-21 09:36:20,986 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:36:20,986 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 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] [2022-07-21 09:36:20,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-21 09:36:20,987 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:36:20,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:36:20,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1748490812, now seen corresponding path program 1 times [2022-07-21 09:36:20,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:36:20,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603204011] [2022-07-21 09:36:20,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:36:20,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:36:21,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:21,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:36:21,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:21,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:36:21,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:21,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:36:21,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:21,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-21 09:36:21,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:21,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:36:21,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:21,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-21 09:36:21,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:21,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-21 09:36:21,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:21,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-21 09:36:21,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:21,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-07-21 09:36:21,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:21,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-21 09:36:21,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:21,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-07-21 09:36:21,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:21,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-07-21 09:36:21,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:21,903 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 30 proven. 13 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-21 09:36:21,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:36:21,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603204011] [2022-07-21 09:36:21,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603204011] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:36:21,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541788816] [2022-07-21 09:36:21,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:36:21,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:36:21,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:36:21,908 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:36:21,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-21 09:36:22,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:22,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 2691 conjuncts, 58 conjunts are in the unsatisfiable core [2022-07-21 09:36:22,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:36:22,442 INFO L390 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 [2022-07-21 09:36:22,969 INFO L390 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 31 treesize of output 26 [2022-07-21 09:36:23,253 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 41 proven. 29 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-21 09:36:23,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:36:23,704 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 14 proven. 30 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-21 09:36:23,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541788816] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:36:23,705 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:36:23,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 12] total 37 [2022-07-21 09:36:23,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788517189] [2022-07-21 09:36:23,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:36:23,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-21 09:36:23,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:36:23,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-21 09:36:23,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1199, Unknown=0, NotChecked=0, Total=1332 [2022-07-21 09:36:23,707 INFO L87 Difference]: Start difference. First operand 363 states and 466 transitions. Second operand has 37 states, 35 states have (on average 5.0) internal successors, (175), 32 states have internal predecessors, (175), 10 states have call successors, (34), 10 states have call predecessors, (34), 9 states have return successors, (29), 8 states have call predecessors, (29), 9 states have call successors, (29) [2022-07-21 09:36:26,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:36:26,361 INFO L93 Difference]: Finished difference Result 573 states and 734 transitions. [2022-07-21 09:36:26,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-21 09:36:26,362 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 5.0) internal successors, (175), 32 states have internal predecessors, (175), 10 states have call successors, (34), 10 states have call predecessors, (34), 9 states have return successors, (29), 8 states have call predecessors, (29), 9 states have call successors, (29) Word has length 118 [2022-07-21 09:36:26,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:36:26,364 INFO L225 Difference]: With dead ends: 573 [2022-07-21 09:36:26,364 INFO L226 Difference]: Without dead ends: 395 [2022-07-21 09:36:26,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 242 SyntacticMatches, 12 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 986 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=460, Invalid=2846, Unknown=0, NotChecked=0, Total=3306 [2022-07-21 09:36:26,367 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 365 mSDsluCounter, 926 mSDsCounter, 0 mSdLazyCounter, 2155 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 1085 SdHoareTripleChecker+Invalid, 2870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 2155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 573 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-21 09:36:26,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 1085 Invalid, 2870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 2155 Invalid, 0 Unknown, 573 Unchecked, 1.9s Time] [2022-07-21 09:36:26,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-07-21 09:36:26,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 382. [2022-07-21 09:36:26,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 274 states have (on average 1.1386861313868613) internal successors, (312), 282 states have internal predecessors, (312), 76 states have call successors, (76), 25 states have call predecessors, (76), 31 states have return successors, (99), 74 states have call predecessors, (99), 74 states have call successors, (99) [2022-07-21 09:36:26,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 487 transitions. [2022-07-21 09:36:26,406 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 487 transitions. Word has length 118 [2022-07-21 09:36:26,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:36:26,406 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 487 transitions. [2022-07-21 09:36:26,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 5.0) internal successors, (175), 32 states have internal predecessors, (175), 10 states have call successors, (34), 10 states have call predecessors, (34), 9 states have return successors, (29), 8 states have call predecessors, (29), 9 states have call successors, (29) [2022-07-21 09:36:26,407 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 487 transitions. [2022-07-21 09:36:26,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-07-21 09:36:26,408 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:36:26,408 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-21 09:36:26,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-21 09:36:26,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-21 09:36:26,623 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:36:26,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:36:26,624 INFO L85 PathProgramCache]: Analyzing trace with hash -579900534, now seen corresponding path program 1 times [2022-07-21 09:36:26,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:36:26,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083352743] [2022-07-21 09:36:26,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:36:26,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:36:26,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:26,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:36:26,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:27,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:36:27,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:27,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:36:27,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:27,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-21 09:36:27,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:27,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:36:27,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:27,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-21 09:36:27,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:27,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-21 09:36:27,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:27,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-21 09:36:27,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:27,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-07-21 09:36:27,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:27,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-21 09:36:27,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:27,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-07-21 09:36:27,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:27,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-07-21 09:36:27,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:27,274 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-07-21 09:36:27,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:36:27,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083352743] [2022-07-21 09:36:27,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083352743] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:36:27,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:36:27,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-21 09:36:27,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466315392] [2022-07-21 09:36:27,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:36:27,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 09:36:27,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:36:27,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 09:36:27,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:36:27,277 INFO L87 Difference]: Start difference. First operand 382 states and 487 transitions. Second operand has 20 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 15 states have internal predecessors, (63), 7 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2022-07-21 09:36:29,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:36:29,897 INFO L93 Difference]: Finished difference Result 569 states and 749 transitions. [2022-07-21 09:36:29,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 09:36:29,898 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 15 states have internal predecessors, (63), 7 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) Word has length 118 [2022-07-21 09:36:29,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:36:29,900 INFO L225 Difference]: With dead ends: 569 [2022-07-21 09:36:29,900 INFO L226 Difference]: Without dead ends: 464 [2022-07-21 09:36:29,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=158, Invalid=1102, Unknown=0, NotChecked=0, Total=1260 [2022-07-21 09:36:29,902 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 379 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 2538 mSolverCounterSat, 275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 2813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Valid, 2538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-21 09:36:29,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [398 Valid, 608 Invalid, 2813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [275 Valid, 2538 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-21 09:36:29,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2022-07-21 09:36:29,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 426. [2022-07-21 09:36:29,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 302 states have (on average 1.1456953642384107) internal successors, (346), 311 states have internal predecessors, (346), 90 states have call successors, (90), 25 states have call predecessors, (90), 33 states have return successors, (122), 89 states have call predecessors, (122), 88 states have call successors, (122) [2022-07-21 09:36:29,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 558 transitions. [2022-07-21 09:36:29,947 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 558 transitions. Word has length 118 [2022-07-21 09:36:29,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:36:29,947 INFO L495 AbstractCegarLoop]: Abstraction has 426 states and 558 transitions. [2022-07-21 09:36:29,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 15 states have internal predecessors, (63), 7 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2022-07-21 09:36:29,948 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 558 transitions. [2022-07-21 09:36:29,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-21 09:36:29,949 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:36:29,949 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 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, 1] [2022-07-21 09:36:29,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-21 09:36:29,950 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:36:29,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:36:29,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1929884852, now seen corresponding path program 1 times [2022-07-21 09:36:29,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:36:29,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429571450] [2022-07-21 09:36:29,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:36:29,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:36:30,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:30,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:36:30,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:30,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:36:30,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:30,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:36:30,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:30,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-21 09:36:30,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:30,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:36:30,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:30,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-21 09:36:30,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:30,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-21 09:36:30,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:30,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-21 09:36:30,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:30,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-07-21 09:36:30,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:30,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-21 09:36:30,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:30,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-07-21 09:36:30,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:30,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-07-21 09:36:30,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:30,234 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-07-21 09:36:30,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:36:30,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429571450] [2022-07-21 09:36:30,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429571450] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:36:30,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:36:30,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 09:36:30,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457024612] [2022-07-21 09:36:30,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:36:30,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 09:36:30,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:36:30,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 09:36:30,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 09:36:30,236 INFO L87 Difference]: Start difference. First operand 426 states and 558 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-07-21 09:36:30,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:36:30,866 INFO L93 Difference]: Finished difference Result 592 states and 781 transitions. [2022-07-21 09:36:30,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 09:36:30,872 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 119 [2022-07-21 09:36:30,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:36:30,874 INFO L225 Difference]: With dead ends: 592 [2022-07-21 09:36:30,874 INFO L226 Difference]: Without dead ends: 431 [2022-07-21 09:36:30,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-07-21 09:36:30,876 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 121 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 09:36:30,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 322 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-21 09:36:30,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-07-21 09:36:30,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 427. [2022-07-21 09:36:30,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 303 states have (on average 1.1452145214521452) internal successors, (347), 312 states have internal predecessors, (347), 90 states have call successors, (90), 25 states have call predecessors, (90), 33 states have return successors, (122), 89 states have call predecessors, (122), 88 states have call successors, (122) [2022-07-21 09:36:30,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 559 transitions. [2022-07-21 09:36:30,926 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 559 transitions. Word has length 119 [2022-07-21 09:36:30,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:36:30,926 INFO L495 AbstractCegarLoop]: Abstraction has 427 states and 559 transitions. [2022-07-21 09:36:30,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-07-21 09:36:30,927 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 559 transitions. [2022-07-21 09:36:30,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-21 09:36:30,929 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:36:30,929 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:36:30,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-21 09:36:30,929 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:36:30,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:36:30,930 INFO L85 PathProgramCache]: Analyzing trace with hash -2035699476, now seen corresponding path program 1 times [2022-07-21 09:36:30,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:36:30,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367463202] [2022-07-21 09:36:30,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:36:30,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:36:31,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:31,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:36:31,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:31,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:36:31,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:31,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:36:31,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:31,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-21 09:36:31,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:31,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:36:31,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:31,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-21 09:36:31,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:31,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-21 09:36:31,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:31,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-07-21 09:36:31,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:31,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-21 09:36:31,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:31,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-07-21 09:36:31,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:31,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-07-21 09:36:31,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:31,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-07-21 09:36:31,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:31,849 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 44 proven. 9 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-07-21 09:36:31,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:36:31,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367463202] [2022-07-21 09:36:31,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367463202] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:36:31,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060370380] [2022-07-21 09:36:31,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:36:31,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:36:31,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:36:31,851 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:36:31,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-21 09:36:32,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:36:32,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 2699 conjuncts, 99 conjunts are in the unsatisfiable core [2022-07-21 09:36:32,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:36:32,366 INFO L390 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 [2022-07-21 09:36:32,488 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-21 09:36:32,488 INFO L390 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 17 treesize of output 21 [2022-07-21 09:36:32,708 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 09:36:32,708 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 09:36:32,757 INFO L390 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 13 treesize of output 9 [2022-07-21 09:36:33,148 INFO L356 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-07-21 09:36:33,149 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 28 [2022-07-21 09:36:33,215 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-07-21 09:36:37,371 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-07-21 09:36:54,430 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 54 proven. 48 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-21 09:36:54,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:36:55,228 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1585 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_save_byte_from_array_~storage#1.base| v_ArrVal_1585) |c_ULTIMATE.start_aws_byte_buf_write_harness_~#buf~3#1.base|) (+ |c_ULTIMATE.start_aws_byte_buf_write_harness_~#buf~3#1.offset| 8)) 0))) is different from false [2022-07-21 09:36:55,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060370380] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:36:55,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:36:55,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 29] total 49 [2022-07-21 09:36:55,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019404311] [2022-07-21 09:36:55,235 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 09:36:55,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-21 09:36:55,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:36:55,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-21 09:36:55,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=3472, Unknown=3, NotChecked=118, Total=3782 [2022-07-21 09:36:55,237 INFO L87 Difference]: Start difference. First operand 427 states and 559 transitions. Second operand has 49 states, 45 states have (on average 3.3555555555555556) internal successors, (151), 41 states have internal predecessors, (151), 14 states have call successors, (25), 9 states have call predecessors, (25), 11 states have return successors, (22), 13 states have call predecessors, (22), 12 states have call successors, (22) [2022-07-21 09:37:01,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:37:01,956 INFO L93 Difference]: Finished difference Result 472 states and 602 transitions. [2022-07-21 09:37:01,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-07-21 09:37:01,957 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 45 states have (on average 3.3555555555555556) internal successors, (151), 41 states have internal predecessors, (151), 14 states have call successors, (25), 9 states have call predecessors, (25), 11 states have return successors, (22), 13 states have call predecessors, (22), 12 states have call successors, (22) Word has length 120 [2022-07-21 09:37:01,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:37:01,958 INFO L225 Difference]: With dead ends: 472 [2022-07-21 09:37:01,958 INFO L226 Difference]: Without dead ends: 465 [2022-07-21 09:37:01,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 162 SyntacticMatches, 12 SemanticMatches, 116 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3364 ImplicationChecksByTransitivity, 26.6s TimeCoverageRelationStatistics Valid=750, Invalid=12822, Unknown=4, NotChecked=230, Total=13806 [2022-07-21 09:37:01,961 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 225 mSDsluCounter, 1683 mSDsCounter, 0 mSdLazyCounter, 3452 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 1822 SdHoareTripleChecker+Invalid, 4784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 3452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1199 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-21 09:37:01,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 1822 Invalid, 4784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 3452 Invalid, 0 Unknown, 1199 Unchecked, 2.3s Time] [2022-07-21 09:37:01,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-07-21 09:37:02,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 446. [2022-07-21 09:37:02,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 319 states have (on average 1.1442006269592477) internal successors, (365), 328 states have internal predecessors, (365), 90 states have call successors, (90), 28 states have call predecessors, (90), 36 states have return successors, (117), 89 states have call predecessors, (117), 88 states have call successors, (117) [2022-07-21 09:37:02,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 572 transitions. [2022-07-21 09:37:02,008 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 572 transitions. Word has length 120 [2022-07-21 09:37:02,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:37:02,009 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 572 transitions. [2022-07-21 09:37:02,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 45 states have (on average 3.3555555555555556) internal successors, (151), 41 states have internal predecessors, (151), 14 states have call successors, (25), 9 states have call predecessors, (25), 11 states have return successors, (22), 13 states have call predecessors, (22), 12 states have call successors, (22) [2022-07-21 09:37:02,009 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 572 transitions. [2022-07-21 09:37:02,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-07-21 09:37:02,011 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:37:02,011 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 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, 1, 1, 1, 1, 1, 1] [2022-07-21 09:37:02,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-07-21 09:37:02,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-21 09:37:02,227 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:37:02,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:37:02,228 INFO L85 PathProgramCache]: Analyzing trace with hash -767380897, now seen corresponding path program 1 times [2022-07-21 09:37:02,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:37:02,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075556516] [2022-07-21 09:37:02,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:37:02,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:37:02,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:37:05,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:37:05,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:37:05,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:37:05,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:37:05,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:37:05,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:37:05,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-21 09:37:05,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:37:05,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:37:05,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:37:05,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-21 09:37:05,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:37:05,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-21 09:37:05,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:37:05,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-07-21 09:37:05,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:37:05,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-21 09:37:05,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:37:05,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-07-21 09:37:05,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:37:05,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-07-21 09:37:05,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:37:05,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-07-21 09:37:05,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:37:06,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-07-21 09:37:06,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:37:06,296 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-21 09:37:06,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:37:06,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075556516] [2022-07-21 09:37:06,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075556516] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:37:06,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507474091] [2022-07-21 09:37:06,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:37:06,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:37:06,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:37:06,300 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:37:06,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-21 09:37:06,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:37:06,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 2900 conjuncts, 110 conjunts are in the unsatisfiable core [2022-07-21 09:37:06,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:37:06,813 INFO L390 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 [2022-07-21 09:37:06,853 INFO L390 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 [2022-07-21 09:37:06,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:37:06,931 INFO L390 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 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 09:37:07,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:37:07,371 INFO L390 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 11 treesize of output 7 [2022-07-21 09:37:07,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:37:07,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:37:07,459 INFO L356 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-07-21 09:37:07,460 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 21 [2022-07-21 09:37:07,545 INFO L390 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 [2022-07-21 09:37:07,551 INFO L390 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 [2022-07-21 09:37:08,667 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 09:37:08,667 INFO L390 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 15 treesize of output 15 [2022-07-21 09:37:08,770 INFO L390 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 29 treesize of output 29 [2022-07-21 09:37:08,779 INFO L390 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 19 treesize of output 21 [2022-07-21 09:37:29,389 INFO L390 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 19 treesize of output 21 [2022-07-21 09:37:29,392 INFO L390 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 29 treesize of output 29 [2022-07-21 09:37:31,599 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_aws_byte_buf_write_~buf.base_BEFORE_CALL_51 Int)) (and (< (+ (select (select |c_#memory_$Pointer$.base| v_aws_byte_buf_write_~buf.base_BEFORE_CALL_51) 8) 1) v_aws_byte_buf_write_~buf.base_BEFORE_CALL_51) (not (= (mod (select (select |c_#memory_int| v_aws_byte_buf_write_~buf.base_BEFORE_CALL_51) 16) 18446744073709551616) 0)))) is different from true [2022-07-21 09:38:12,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 09:38:12,876 INFO L390 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2022-07-21 09:38:12,943 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1904 (Array Int Int))) (= (store |c_old(#memory_int)| |c_#Ultimate.C_memcpy_dest.base| v_ArrVal_1904) |c_#memory_int|)) is different from true [2022-07-21 09:38:12,948 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1905 (Array Int Int))) (= (store |c_old(#memory_int)| |c_#Ultimate.C_memcpy_dest.base| v_ArrVal_1905) |c_#memory_int|)) is different from true [2022-07-21 09:38:12,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:38:12,955 INFO L390 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 [2022-07-21 09:38:13,021 INFO L390 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 22 treesize of output 21 [2022-07-21 09:38:19,848 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 32 proven. 29 refuted. 0 times theorem prover too weak. 19 trivial. 34 not checked. [2022-07-21 09:38:19,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:38:20,191 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1912 (Array Int Int))) (not (= 0 (mod (select (select (store |c_#memory_int| |c_aws_byte_buf_write_#t~mem1170.base| v_ArrVal_1912) c_aws_byte_buf_write_~buf.base) (+ c_aws_byte_buf_write_~buf.offset 16)) 18446744073709551616)))) is different from false [2022-07-21 09:38:20,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507474091] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:38:20,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:38:20,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 34] total 65 [2022-07-21 09:38:20,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372251335] [2022-07-21 09:38:20,193 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 09:38:20,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-07-21 09:38:20,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:38:20,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-07-21 09:38:20,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=4059, Unknown=15, NotChecked=524, Total=4830 [2022-07-21 09:38:20,194 INFO L87 Difference]: Start difference. First operand 446 states and 572 transitions. Second operand has 65 states, 57 states have (on average 2.6491228070175437) internal successors, (151), 50 states have internal predecessors, (151), 22 states have call successors, (27), 14 states have call predecessors, (27), 14 states have return successors, (24), 18 states have call predecessors, (24), 19 states have call successors, (24) [2022-07-21 09:38:46,796 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []