./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_byte_cursor_satisfies_pred_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/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_cursor_satisfies_pred_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 21e14c4abf3c8c626ff1e4d64bac7246a96ab8c19ab8b6f263006a7e1f8fc191 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 17:04:15,644 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 17:04:15,645 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 17:04:15,663 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 17:04:15,663 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 17:04:15,664 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 17:04:15,665 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 17:04:15,666 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 17:04:15,668 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 17:04:15,668 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 17:04:15,669 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 17:04:15,670 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 17:04:15,670 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 17:04:15,671 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 17:04:15,672 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 17:04:15,673 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 17:04:15,674 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 17:04:15,674 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 17:04:15,675 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 17:04:15,677 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 17:04:15,677 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 17:04:15,678 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 17:04:15,679 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 17:04:15,680 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 17:04:15,681 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 17:04:15,682 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 17:04:15,682 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 17:04:15,683 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 17:04:15,683 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 17:04:15,684 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 17:04:15,684 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 17:04:15,684 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 17:04:15,685 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 17:04:15,686 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 17:04:15,686 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 17:04:15,686 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 17:04:15,687 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 17:04:15,687 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 17:04:15,687 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 17:04:15,688 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 17:04:15,688 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 17:04:15,689 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-14 17:04:15,702 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 17:04:15,703 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 17:04:15,703 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 17:04:15,703 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 17:04:15,704 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 17:04:15,704 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 17:04:15,704 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 17:04:15,709 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 17:04:15,709 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 17:04:15,709 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 17:04:15,709 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 17:04:15,710 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 17:04:15,710 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 17:04:15,710 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 17:04:15,710 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 17:04:15,710 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 17:04:15,710 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 17:04:15,710 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 17:04:15,711 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 17:04:15,711 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 17:04:15,711 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 17:04:15,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 17:04:15,712 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 17:04:15,712 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 17:04:15,712 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 17:04:15,712 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 17:04:15,712 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 17:04:15,712 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 17:04:15,713 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 17:04:15,713 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 17:04:15,713 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 17:04:15,713 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 21e14c4abf3c8c626ff1e4d64bac7246a96ab8c19ab8b6f263006a7e1f8fc191 [2021-12-14 17:04:15,875 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 17:04:15,889 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 17:04:15,892 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 17:04:15,893 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 17:04:15,893 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 17:04:15,894 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_byte_cursor_satisfies_pred_harness.i [2021-12-14 17:04:15,934 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cab2c6ac/4af60a82c5e34ac0b36052b656bf9962/FLAG64525befd [2021-12-14 17:04:16,512 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 17:04:16,513 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_cursor_satisfies_pred_harness.i [2021-12-14 17:04:16,544 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cab2c6ac/4af60a82c5e34ac0b36052b656bf9962/FLAG64525befd [2021-12-14 17:04:16,966 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cab2c6ac/4af60a82c5e34ac0b36052b656bf9962 [2021-12-14 17:04:16,968 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 17:04:16,970 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 17:04:16,971 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 17:04:16,971 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 17:04:16,973 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 17:04:16,973 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:04:16" (1/1) ... [2021-12-14 17:04:16,974 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f972d4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:04:16, skipping insertion in model container [2021-12-14 17:04:16,974 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:04:16" (1/1) ... [2021-12-14 17:04:16,979 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 17:04:17,055 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 17:04:17,217 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_cursor_satisfies_pred_harness.i[4504,4517] [2021-12-14 17:04:17,222 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_cursor_satisfies_pred_harness.i[4564,4577] [2021-12-14 17:04:17,704 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:04:17,710 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:04:17,710 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:04:17,711 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:04:17,712 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:04:17,722 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:04:17,723 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:04:17,725 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:04:17,725 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:04:17,925 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-14 17:04:17,926 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-14 17:04:17,926 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-14 17:04:17,927 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-14 17:04:17,928 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-14 17:04:17,928 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-14 17:04:17,929 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-14 17:04:17,929 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-14 17:04:17,930 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-14 17:04:17,930 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-14 17:04:18,044 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-14 17:04:18,150 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:04:18,151 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:04:18,212 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 17:04:18,261 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 17:04:18,283 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_cursor_satisfies_pred_harness.i[4504,4517] [2021-12-14 17:04:18,284 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_cursor_satisfies_pred_harness.i[4564,4577] [2021-12-14 17:04:18,312 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:04:18,315 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:04:18,315 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:04:18,316 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:04:18,316 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:04:18,320 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:04:18,321 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:04:18,321 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:04:18,322 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:04:18,368 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-14 17:04:18,369 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-14 17:04:18,370 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-14 17:04:18,370 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-14 17:04:18,371 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-14 17:04:18,371 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-14 17:04:18,371 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-14 17:04:18,372 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-14 17:04:18,372 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-14 17:04:18,372 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-14 17:04:18,392 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-14 17:04:18,436 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:04:18,437 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:04:18,458 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 17:04:18,619 INFO L208 MainTranslator]: Completed translation [2021-12-14 17:04:18,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:04:18 WrapperNode [2021-12-14 17:04:18,619 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 17:04:18,620 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 17:04:18,620 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 17:04:18,620 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 17:04:18,625 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:04:18" (1/1) ... [2021-12-14 17:04:18,699 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:04:18" (1/1) ... [2021-12-14 17:04:18,762 INFO L137 Inliner]: procedures = 690, calls = 2614, calls flagged for inlining = 62, calls inlined = 9, statements flattened = 811 [2021-12-14 17:04:18,764 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 17:04:18,764 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 17:04:18,765 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 17:04:18,765 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 17:04:18,770 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:04:18" (1/1) ... [2021-12-14 17:04:18,771 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:04:18" (1/1) ... [2021-12-14 17:04:18,779 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:04:18" (1/1) ... [2021-12-14 17:04:18,779 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:04:18" (1/1) ... [2021-12-14 17:04:18,817 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:04:18" (1/1) ... [2021-12-14 17:04:18,827 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:04:18" (1/1) ... [2021-12-14 17:04:18,836 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:04:18" (1/1) ... [2021-12-14 17:04:18,842 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 17:04:18,845 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 17:04:18,846 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 17:04:18,846 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 17:04:18,846 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:04:18" (1/1) ... [2021-12-14 17:04:18,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 17:04:18,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:04:18,880 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) [2021-12-14 17:04:18,895 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 [2021-12-14 17:04:18,921 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2021-12-14 17:04:18,921 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2021-12-14 17:04:18,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 17:04:18,921 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-14 17:04:18,922 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-14 17:04:18,922 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 17:04:18,922 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-14 17:04:18,922 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-14 17:04:18,922 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_left_trim_pred [2021-12-14 17:04:18,922 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_left_trim_pred [2021-12-14 17:04:18,923 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-14 17:04:18,923 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 17:04:18,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-14 17:04:18,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 17:04:18,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 17:04:18,924 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-14 17:04:18,924 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-14 17:04:18,924 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-12-14 17:04:18,924 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-12-14 17:04:18,925 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-14 17:04:18,925 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-14 17:04:18,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 17:04:18,925 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-14 17:04:18,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-14 17:04:18,925 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~~uint8_t~0~TO~int [2021-12-14 17:04:18,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~~uint8_t~0~TO~int [2021-12-14 17:04:18,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 17:04:18,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 17:04:19,172 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 17:04:19,174 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 17:04:19,845 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 17:04:19,852 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 17:04:19,852 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-14 17:04:19,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:04:19 BoogieIcfgContainer [2021-12-14 17:04:19,854 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 17:04:19,856 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 17:04:19,856 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 17:04:19,858 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 17:04:19,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 05:04:16" (1/3) ... [2021-12-14 17:04:19,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e24f783 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:04:19, skipping insertion in model container [2021-12-14 17:04:19,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:04:18" (2/3) ... [2021-12-14 17:04:19,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e24f783 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:04:19, skipping insertion in model container [2021-12-14 17:04:19,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:04:19" (3/3) ... [2021-12-14 17:04:19,861 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_cursor_satisfies_pred_harness.i [2021-12-14 17:04:19,864 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 17:04:19,864 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 17:04:19,902 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 17:04:19,916 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 17:04:19,916 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 17:04:19,932 INFO L276 IsEmpty]: Start isEmpty. Operand has 96 states, 64 states have (on average 1.234375) internal successors, (79), 65 states have internal predecessors, (79), 22 states have call successors, (22), 8 states have call predecessors, (22), 8 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-14 17:04:19,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-14 17:04:19,937 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:04:19,938 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:04:19,938 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:04:19,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:04:19,942 INFO L85 PathProgramCache]: Analyzing trace with hash 843534149, now seen corresponding path program 1 times [2021-12-14 17:04:19,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:04:19,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966418798] [2021-12-14 17:04:19,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:19,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:04:20,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:20,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:04:20,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:20,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:20,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:20,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:04:20,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:20,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-14 17:04:20,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:20,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:04:20,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:20,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:04:20,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:20,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-14 17:04:20,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:20,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 17:04:20,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:20,488 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-14 17:04:20,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:04:20,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966418798] [2021-12-14 17:04:20,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966418798] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:04:20,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:04:20,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 17:04:20,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308754708] [2021-12-14 17:04:20,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:04:20,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-14 17:04:20,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:04:20,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-14 17:04:20,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 17:04:20,537 INFO L87 Difference]: Start difference. First operand has 96 states, 64 states have (on average 1.234375) internal successors, (79), 65 states have internal predecessors, (79), 22 states have call successors, (22), 8 states have call predecessors, (22), 8 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 17:04:20,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:04:20,569 INFO L93 Difference]: Finished difference Result 188 states and 255 transitions. [2021-12-14 17:04:20,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-14 17:04:20,584 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2021-12-14 17:04:20,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:04:20,590 INFO L225 Difference]: With dead ends: 188 [2021-12-14 17:04:20,590 INFO L226 Difference]: Without dead ends: 87 [2021-12-14 17:04:20,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 17:04:20,606 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:04:20,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:04:20,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-12-14 17:04:20,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-12-14 17:04:20,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 57 states have (on average 1.1754385964912282) internal successors, (67), 58 states have internal predecessors, (67), 22 states have call successors, (22), 8 states have call predecessors, (22), 7 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-14 17:04:20,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 109 transitions. [2021-12-14 17:04:20,663 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 109 transitions. Word has length 61 [2021-12-14 17:04:20,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:04:20,663 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 109 transitions. [2021-12-14 17:04:20,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 17:04:20,664 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 109 transitions. [2021-12-14 17:04:20,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-14 17:04:20,666 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:04:20,666 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:04:20,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 17:04:20,666 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:04:20,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:04:20,667 INFO L85 PathProgramCache]: Analyzing trace with hash -2126644258, now seen corresponding path program 1 times [2021-12-14 17:04:20,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:04:20,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784372345] [2021-12-14 17:04:20,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:20,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:04:20,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:20,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:04:20,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:20,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:20,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:20,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:04:20,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:20,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-14 17:04:20,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:20,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:04:20,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:20,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:04:20,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:21,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-14 17:04:21,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:21,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 17:04:21,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:21,030 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-14 17:04:21,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:04:21,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784372345] [2021-12-14 17:04:21,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784372345] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:04:21,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557411562] [2021-12-14 17:04:21,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:21,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:04:21,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:04:21,054 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) [2021-12-14 17:04:21,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 17:04:21,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:21,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 2504 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 17:04:21,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:04:21,668 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-14 17:04:21,668 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:04:21,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557411562] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:04:21,668 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:04:21,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2021-12-14 17:04:21,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797841000] [2021-12-14 17:04:21,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:04:21,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 17:04:21,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:04:21,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 17:04:21,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-14 17:04:21,671 INFO L87 Difference]: Start difference. First operand 87 states and 109 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 17:04:21,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:04:21,770 INFO L93 Difference]: Finished difference Result 157 states and 202 transitions. [2021-12-14 17:04:21,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 17:04:21,771 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 63 [2021-12-14 17:04:21,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:04:21,773 INFO L225 Difference]: With dead ends: 157 [2021-12-14 17:04:21,773 INFO L226 Difference]: Without dead ends: 90 [2021-12-14 17:04:21,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-12-14 17:04:21,775 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 126 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:04:21,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 300 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 17:04:21,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-14 17:04:21,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-12-14 17:04:21,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 59 states have (on average 1.1694915254237288) internal successors, (69), 61 states have internal predecessors, (69), 22 states have call successors, (22), 8 states have call predecessors, (22), 8 states have return successors, (24), 20 states have call predecessors, (24), 20 states have call successors, (24) [2021-12-14 17:04:21,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 115 transitions. [2021-12-14 17:04:21,784 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 115 transitions. Word has length 63 [2021-12-14 17:04:21,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:04:21,785 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 115 transitions. [2021-12-14 17:04:21,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 17:04:21,785 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 115 transitions. [2021-12-14 17:04:21,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 17:04:21,787 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:04:21,787 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:04:21,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 17:04:22,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:04:22,007 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:04:22,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:04:22,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1088384551, now seen corresponding path program 1 times [2021-12-14 17:04:22,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:04:22,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889007602] [2021-12-14 17:04:22,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:22,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:04:22,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:22,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:04:22,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:22,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:22,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:22,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:04:22,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:22,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:04:22,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:22,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-14 17:04:22,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:22,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 17:04:22,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:22,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-14 17:04:22,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:22,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-14 17:04:22,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:22,208 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-14 17:04:22,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:04:22,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889007602] [2021-12-14 17:04:22,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889007602] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:04:22,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570936350] [2021-12-14 17:04:22,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:22,209 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:04:22,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:04:22,224 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) [2021-12-14 17:04:22,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 17:04:22,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:22,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 2509 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-14 17:04:22,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:04:22,733 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-14 17:04:22,734 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:04:22,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570936350] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:04:22,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:04:22,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 15 [2021-12-14 17:04:22,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987492148] [2021-12-14 17:04:22,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:04:22,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 17:04:22,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:04:22,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 17:04:22,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-12-14 17:04:22,736 INFO L87 Difference]: Start difference. First operand 90 states and 115 transitions. Second operand has 9 states, 7 states have (on average 5.857142857142857) internal successors, (41), 8 states have internal predecessors, (41), 4 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-14 17:04:22,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:04:22,906 INFO L93 Difference]: Finished difference Result 150 states and 191 transitions. [2021-12-14 17:04:22,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 17:04:22,907 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 5.857142857142857) internal successors, (41), 8 states have internal predecessors, (41), 4 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 65 [2021-12-14 17:04:22,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:04:22,908 INFO L225 Difference]: With dead ends: 150 [2021-12-14 17:04:22,908 INFO L226 Difference]: Without dead ends: 90 [2021-12-14 17:04:22,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-12-14 17:04:22,909 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 143 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:04:22,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 489 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 17:04:22,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-14 17:04:22,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-12-14 17:04:22,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 59 states have (on average 1.1694915254237288) internal successors, (69), 61 states have internal predecessors, (69), 22 states have call successors, (22), 8 states have call predecessors, (22), 8 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2021-12-14 17:04:22,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 112 transitions. [2021-12-14 17:04:22,916 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 112 transitions. Word has length 65 [2021-12-14 17:04:22,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:04:22,916 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 112 transitions. [2021-12-14 17:04:22,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 5.857142857142857) internal successors, (41), 8 states have internal predecessors, (41), 4 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-14 17:04:22,916 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 112 transitions. [2021-12-14 17:04:22,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-14 17:04:22,918 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:04:22,918 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:04:22,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 17:04:23,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-14 17:04:23,132 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:04:23,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:04:23,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1116444153, now seen corresponding path program 1 times [2021-12-14 17:04:23,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:04:23,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297843755] [2021-12-14 17:04:23,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:23,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:04:23,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:23,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:04:23,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:23,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:23,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:23,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:04:23,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:23,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:04:23,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:23,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-14 17:04:23,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:23,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 17:04:23,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:23,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 17:04:23,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:23,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-14 17:04:23,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:23,539 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-14 17:04:23,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:04:23,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297843755] [2021-12-14 17:04:23,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297843755] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:04:23,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:04:23,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 17:04:23,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435452579] [2021-12-14 17:04:23,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:04:23,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 17:04:23,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:04:23,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 17:04:23,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 17:04:23,541 INFO L87 Difference]: Start difference. First operand 90 states and 112 transitions. Second operand has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-12-14 17:04:23,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:04:23,586 INFO L93 Difference]: Finished difference Result 102 states and 129 transitions. [2021-12-14 17:04:23,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 17:04:23,587 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 69 [2021-12-14 17:04:23,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:04:23,588 INFO L225 Difference]: With dead ends: 102 [2021-12-14 17:04:23,588 INFO L226 Difference]: Without dead ends: 100 [2021-12-14 17:04:23,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-14 17:04:23,589 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 16 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:04:23,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 728 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:04:23,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-14 17:04:23,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2021-12-14 17:04:23,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 68 states have internal predecessors, (75), 23 states have call successors, (23), 9 states have call predecessors, (23), 10 states have return successors, (28), 21 states have call predecessors, (28), 21 states have call successors, (28) [2021-12-14 17:04:23,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 126 transitions. [2021-12-14 17:04:23,595 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 126 transitions. Word has length 69 [2021-12-14 17:04:23,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:04:23,595 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 126 transitions. [2021-12-14 17:04:23,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-12-14 17:04:23,597 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 126 transitions. [2021-12-14 17:04:23,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-14 17:04:23,600 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:04:23,600 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:04:23,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 17:04:23,600 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:04:23,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:04:23,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1585986623, now seen corresponding path program 1 times [2021-12-14 17:04:23,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:04:23,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611276476] [2021-12-14 17:04:23,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:23,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:04:23,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:23,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:04:23,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:23,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:23,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:23,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:04:23,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:23,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:04:23,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:23,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-14 17:04:23,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:23,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 17:04:23,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:23,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 17:04:23,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:23,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-14 17:04:23,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:24,047 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-14 17:04:24,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:04:24,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611276476] [2021-12-14 17:04:24,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611276476] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:04:24,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14749366] [2021-12-14 17:04:24,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:24,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:04:24,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:04:24,072 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) [2021-12-14 17:04:24,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 17:04:24,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:24,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 2531 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-14 17:04:24,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:04:25,402 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-14 17:04:25,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:04:25,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-12-14 17:04:25,723 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-12-14 17:04:25,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2021-12-14 17:04:25,747 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-14 17:04:25,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14749366] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 17:04:25,747 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 17:04:25,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 12] total 25 [2021-12-14 17:04:25,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826079944] [2021-12-14 17:04:25,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 17:04:25,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-14 17:04:25,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:04:25,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-14 17:04:25,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-12-14 17:04:25,751 INFO L87 Difference]: Start difference. First operand 99 states and 126 transitions. Second operand has 25 states, 23 states have (on average 3.782608695652174) internal successors, (87), 23 states have internal predecessors, (87), 9 states have call successors, (19), 5 states have call predecessors, (19), 5 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2021-12-14 17:04:26,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:04:26,921 INFO L93 Difference]: Finished difference Result 248 states and 330 transitions. [2021-12-14 17:04:26,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-14 17:04:26,922 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 3.782608695652174) internal successors, (87), 23 states have internal predecessors, (87), 9 states have call successors, (19), 5 states have call predecessors, (19), 5 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) Word has length 73 [2021-12-14 17:04:26,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:04:26,930 INFO L225 Difference]: With dead ends: 248 [2021-12-14 17:04:26,930 INFO L226 Difference]: Without dead ends: 169 [2021-12-14 17:04:26,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 140 SyntacticMatches, 12 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=230, Invalid=1330, Unknown=0, NotChecked=0, Total=1560 [2021-12-14 17:04:26,947 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 121 mSDsluCounter, 1226 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 1349 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 247 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 17:04:26,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 1349 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 828 Invalid, 0 Unknown, 247 Unchecked, 0.7s Time] [2021-12-14 17:04:26,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-12-14 17:04:26,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 145. [2021-12-14 17:04:26,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 97 states have (on average 1.175257731958763) internal successors, (114), 101 states have internal predecessors, (114), 34 states have call successors, (34), 12 states have call predecessors, (34), 13 states have return successors, (41), 31 states have call predecessors, (41), 32 states have call successors, (41) [2021-12-14 17:04:26,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 189 transitions. [2021-12-14 17:04:26,961 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 189 transitions. Word has length 73 [2021-12-14 17:04:26,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:04:26,961 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 189 transitions. [2021-12-14 17:04:26,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 3.782608695652174) internal successors, (87), 23 states have internal predecessors, (87), 9 states have call successors, (19), 5 states have call predecessors, (19), 5 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2021-12-14 17:04:26,962 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 189 transitions. [2021-12-14 17:04:26,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-14 17:04:26,963 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:04:26,963 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:04:26,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 17:04:27,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:04:27,178 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:04:27,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:04:27,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1490150051, now seen corresponding path program 1 times [2021-12-14 17:04:27,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:04:27,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134575934] [2021-12-14 17:04:27,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:27,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:04:27,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:27,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:04:27,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:27,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:27,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:27,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:04:27,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:27,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:04:27,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:27,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-14 17:04:27,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:27,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 17:04:27,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:27,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 17:04:27,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:27,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 17:04:27,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:27,466 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-14 17:04:27,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:04:27,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134575934] [2021-12-14 17:04:27,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134575934] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:04:27,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:04:27,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 17:04:27,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248996033] [2021-12-14 17:04:27,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:04:27,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 17:04:27,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:04:27,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 17:04:27,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 17:04:27,468 INFO L87 Difference]: Start difference. First operand 145 states and 189 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 17:04:27,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:04:27,479 INFO L93 Difference]: Finished difference Result 209 states and 273 transitions. [2021-12-14 17:04:27,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 17:04:27,480 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 76 [2021-12-14 17:04:27,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:04:27,481 INFO L225 Difference]: With dead ends: 209 [2021-12-14 17:04:27,481 INFO L226 Difference]: Without dead ends: 148 [2021-12-14 17:04:27,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 17:04:27,482 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 0 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:04:27,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 211 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:04:27,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-12-14 17:04:27,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2021-12-14 17:04:27,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 100 states have (on average 1.17) internal successors, (117), 104 states have internal predecessors, (117), 34 states have call successors, (34), 12 states have call predecessors, (34), 13 states have return successors, (41), 31 states have call predecessors, (41), 32 states have call successors, (41) [2021-12-14 17:04:27,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 192 transitions. [2021-12-14 17:04:27,526 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 192 transitions. Word has length 76 [2021-12-14 17:04:27,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:04:27,526 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 192 transitions. [2021-12-14 17:04:27,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 17:04:27,526 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 192 transitions. [2021-12-14 17:04:27,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-14 17:04:27,527 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:04:27,527 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:04:27,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 17:04:27,527 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:04:27,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:04:27,528 INFO L85 PathProgramCache]: Analyzing trace with hash -142358706, now seen corresponding path program 1 times [2021-12-14 17:04:27,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:04:27,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545328573] [2021-12-14 17:04:27,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:27,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:04:27,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:27,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:04:27,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:27,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:27,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:27,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:04:27,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:27,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:04:27,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:27,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-14 17:04:27,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:27,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 17:04:27,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:27,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 17:04:27,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:27,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-14 17:04:27,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:27,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 17:04:27,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:27,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-14 17:04:27,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:27,676 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-14 17:04:27,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:04:27,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545328573] [2021-12-14 17:04:27,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545328573] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:04:27,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:04:27,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 17:04:27,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24663347] [2021-12-14 17:04:27,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:04:27,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 17:04:27,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:04:27,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 17:04:27,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:04:27,678 INFO L87 Difference]: Start difference. First operand 148 states and 192 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-14 17:04:27,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:04:27,706 INFO L93 Difference]: Finished difference Result 191 states and 244 transitions. [2021-12-14 17:04:27,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:04:27,707 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 81 [2021-12-14 17:04:27,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:04:27,708 INFO L225 Difference]: With dead ends: 191 [2021-12-14 17:04:27,708 INFO L226 Difference]: Without dead ends: 145 [2021-12-14 17:04:27,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:04:27,709 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 18 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:04:27,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 375 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:04:27,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-12-14 17:04:27,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-12-14 17:04:27,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 98 states have (on average 1.163265306122449) internal successors, (114), 101 states have internal predecessors, (114), 34 states have call successors, (34), 12 states have call predecessors, (34), 12 states have return successors, (40), 31 states have call predecessors, (40), 32 states have call successors, (40) [2021-12-14 17:04:27,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 188 transitions. [2021-12-14 17:04:27,717 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 188 transitions. Word has length 81 [2021-12-14 17:04:27,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:04:27,717 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 188 transitions. [2021-12-14 17:04:27,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-14 17:04:27,718 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 188 transitions. [2021-12-14 17:04:27,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-14 17:04:27,719 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:04:27,719 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:04:27,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 17:04:27,719 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:04:27,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:04:27,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1299041201, now seen corresponding path program 1 times [2021-12-14 17:04:27,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:04:27,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507896669] [2021-12-14 17:04:27,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:27,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:04:27,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:27,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:04:27,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:27,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:27,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:27,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:04:27,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:27,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-14 17:04:27,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:27,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:04:27,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:27,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-14 17:04:27,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:27,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-14 17:04:27,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:27,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 17:04:27,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:27,899 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-14 17:04:27,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:04:27,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507896669] [2021-12-14 17:04:27,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507896669] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:04:27,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441215040] [2021-12-14 17:04:27,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:27,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:04:27,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:04:27,900 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) [2021-12-14 17:04:27,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 17:04:28,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:28,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 2555 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-14 17:04:28,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:04:28,379 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-14 17:04:28,380 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:04:28,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441215040] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:04:28,380 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:04:28,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 10 [2021-12-14 17:04:28,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612274781] [2021-12-14 17:04:28,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:04:28,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 17:04:28,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:04:28,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 17:04:28,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-14 17:04:28,408 INFO L87 Difference]: Start difference. First operand 145 states and 188 transitions. Second operand has 9 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-14 17:04:28,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:04:28,489 INFO L93 Difference]: Finished difference Result 238 states and 313 transitions. [2021-12-14 17:04:28,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 17:04:28,490 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 81 [2021-12-14 17:04:28,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:04:28,491 INFO L225 Difference]: With dead ends: 238 [2021-12-14 17:04:28,492 INFO L226 Difference]: Without dead ends: 150 [2021-12-14 17:04:28,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-12-14 17:04:28,493 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 12 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 819 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:04:28,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 819 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 17:04:28,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-12-14 17:04:28,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2021-12-14 17:04:28,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 102 states have (on average 1.1568627450980393) internal successors, (118), 106 states have internal predecessors, (118), 34 states have call successors, (34), 12 states have call predecessors, (34), 13 states have return successors, (45), 31 states have call predecessors, (45), 32 states have call successors, (45) [2021-12-14 17:04:28,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 197 transitions. [2021-12-14 17:04:28,507 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 197 transitions. Word has length 81 [2021-12-14 17:04:28,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:04:28,508 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 197 transitions. [2021-12-14 17:04:28,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-14 17:04:28,508 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 197 transitions. [2021-12-14 17:04:28,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-14 17:04:28,509 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:04:28,509 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:04:28,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 17:04:28,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:04:28,731 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:04:28,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:04:28,731 INFO L85 PathProgramCache]: Analyzing trace with hash -176228817, now seen corresponding path program 1 times [2021-12-14 17:04:28,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:04:28,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232962943] [2021-12-14 17:04:28,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:28,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:04:28,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:28,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:04:28,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:28,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:28,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:28,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:04:28,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:29,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:04:29,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:29,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-14 17:04:29,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:29,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 17:04:29,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:29,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 17:04:29,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:29,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-14 17:04:29,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:29,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-14 17:04:29,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:29,068 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-14 17:04:29,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:04:29,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232962943] [2021-12-14 17:04:29,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232962943] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:04:29,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208247121] [2021-12-14 17:04:29,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:29,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:04:29,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:04:29,084 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) [2021-12-14 17:04:29,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 17:04:29,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:29,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 2594 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-14 17:04:29,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:04:29,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 17:04:30,312 INFO L354 Elim1Store]: treesize reduction 25, result has 10.7 percent of original size [2021-12-14 17:04:30,313 INFO L388 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 55 treesize of output 34 [2021-12-14 17:04:30,402 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-14 17:04:30,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:04:30,718 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-14 17:04:30,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208247121] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 17:04:30,718 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 17:04:30,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 11] total 23 [2021-12-14 17:04:30,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688323700] [2021-12-14 17:04:30,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 17:04:30,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-14 17:04:30,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:04:30,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-14 17:04:30,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-12-14 17:04:30,720 INFO L87 Difference]: Start difference. First operand 150 states and 197 transitions. Second operand has 23 states, 21 states have (on average 4.285714285714286) internal successors, (90), 21 states have internal predecessors, (90), 10 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2021-12-14 17:04:31,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:04:31,692 INFO L93 Difference]: Finished difference Result 298 states and 395 transitions. [2021-12-14 17:04:31,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-14 17:04:31,693 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 4.285714285714286) internal successors, (90), 21 states have internal predecessors, (90), 10 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) Word has length 82 [2021-12-14 17:04:31,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:04:31,694 INFO L225 Difference]: With dead ends: 298 [2021-12-14 17:04:31,694 INFO L226 Difference]: Without dead ends: 211 [2021-12-14 17:04:31,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 161 SyntacticMatches, 12 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=214, Invalid=1592, Unknown=0, NotChecked=0, Total=1806 [2021-12-14 17:04:31,695 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 125 mSDsluCounter, 1210 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 1323 SdHoareTripleChecker+Invalid, 1167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 209 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 17:04:31,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 1323 Invalid, 1167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 917 Invalid, 0 Unknown, 209 Unchecked, 0.6s Time] [2021-12-14 17:04:31,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-12-14 17:04:31,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 164. [2021-12-14 17:04:31,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 111 states have (on average 1.117117117117117) internal successors, (124), 115 states have internal predecessors, (124), 36 states have call successors, (36), 14 states have call predecessors, (36), 16 states have return successors, (50), 34 states have call predecessors, (50), 34 states have call successors, (50) [2021-12-14 17:04:31,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 210 transitions. [2021-12-14 17:04:31,715 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 210 transitions. Word has length 82 [2021-12-14 17:04:31,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:04:31,715 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 210 transitions. [2021-12-14 17:04:31,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 4.285714285714286) internal successors, (90), 21 states have internal predecessors, (90), 10 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2021-12-14 17:04:31,716 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 210 transitions. [2021-12-14 17:04:31,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-14 17:04:31,717 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:04:31,717 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:04:31,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 17:04:31,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:04:31,931 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:04:31,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:04:31,932 INFO L85 PathProgramCache]: Analyzing trace with hash -980978556, now seen corresponding path program 1 times [2021-12-14 17:04:31,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:04:31,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333911149] [2021-12-14 17:04:31,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:31,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:04:31,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:32,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:04:32,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:32,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:32,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:32,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:04:32,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:32,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 17:04:32,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:32,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 17:04:32,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:32,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 17:04:32,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:32,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 17:04:32,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:32,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-14 17:04:32,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:32,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-14 17:04:32,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:32,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-14 17:04:32,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:32,204 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-14 17:04:32,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:04:32,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333911149] [2021-12-14 17:04:32,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333911149] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:04:32,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:04:32,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 17:04:32,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346446384] [2021-12-14 17:04:32,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:04:32,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 17:04:32,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:04:32,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 17:04:32,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 17:04:32,206 INFO L87 Difference]: Start difference. First operand 164 states and 210 transitions. Second operand has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-14 17:04:32,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:04:32,247 INFO L93 Difference]: Finished difference Result 174 states and 221 transitions. [2021-12-14 17:04:32,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 17:04:32,248 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 89 [2021-12-14 17:04:32,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:04:32,279 INFO L225 Difference]: With dead ends: 174 [2021-12-14 17:04:32,280 INFO L226 Difference]: Without dead ends: 172 [2021-12-14 17:04:32,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-14 17:04:32,281 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 16 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:04:32,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 720 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:04:32,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-12-14 17:04:32,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 170. [2021-12-14 17:04:32,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 114 states have (on average 1.1140350877192982) internal successors, (127), 118 states have internal predecessors, (127), 38 states have call successors, (38), 15 states have call predecessors, (38), 17 states have return successors, (52), 36 states have call predecessors, (52), 36 states have call successors, (52) [2021-12-14 17:04:32,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 217 transitions. [2021-12-14 17:04:32,299 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 217 transitions. Word has length 89 [2021-12-14 17:04:32,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:04:32,299 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 217 transitions. [2021-12-14 17:04:32,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-14 17:04:32,299 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 217 transitions. [2021-12-14 17:04:32,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-14 17:04:32,300 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:04:32,300 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:04:32,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 17:04:32,301 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:04:32,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:04:32,301 INFO L85 PathProgramCache]: Analyzing trace with hash 499080586, now seen corresponding path program 1 times [2021-12-14 17:04:32,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:04:32,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437284000] [2021-12-14 17:04:32,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:32,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:04:32,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:32,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:04:32,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:32,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:32,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:32,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:04:32,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:32,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 17:04:32,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:32,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 17:04:32,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:32,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-14 17:04:32,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:32,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-14 17:04:32,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:32,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 17:04:32,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:32,637 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-14 17:04:32,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:04:32,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437284000] [2021-12-14 17:04:32,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437284000] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:04:32,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449719686] [2021-12-14 17:04:32,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:32,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:04:32,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:04:32,664 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) [2021-12-14 17:04:32,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 17:04:33,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:33,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 2565 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-14 17:04:33,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:04:33,187 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 17:04:33,187 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:04:33,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449719686] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:04:33,188 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:04:33,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 10 [2021-12-14 17:04:33,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945943510] [2021-12-14 17:04:33,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:04:33,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 17:04:33,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:04:33,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 17:04:33,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-14 17:04:33,191 INFO L87 Difference]: Start difference. First operand 170 states and 217 transitions. Second operand has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-14 17:04:33,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:04:33,293 INFO L93 Difference]: Finished difference Result 278 states and 351 transitions. [2021-12-14 17:04:33,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 17:04:33,300 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 83 [2021-12-14 17:04:33,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:04:33,301 INFO L225 Difference]: With dead ends: 278 [2021-12-14 17:04:33,301 INFO L226 Difference]: Without dead ends: 158 [2021-12-14 17:04:33,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-12-14 17:04:33,302 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 12 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:04:33,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 812 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 17:04:33,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-12-14 17:04:33,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2021-12-14 17:04:33,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 106 states have (on average 1.1132075471698113) internal successors, (118), 109 states have internal predecessors, (118), 36 states have call successors, (36), 14 states have call predecessors, (36), 15 states have return successors, (48), 34 states have call predecessors, (48), 34 states have call successors, (48) [2021-12-14 17:04:33,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 202 transitions. [2021-12-14 17:04:33,321 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 202 transitions. Word has length 83 [2021-12-14 17:04:33,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:04:33,322 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 202 transitions. [2021-12-14 17:04:33,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-14 17:04:33,322 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 202 transitions. [2021-12-14 17:04:33,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-14 17:04:33,325 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:04:33,325 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:04:33,344 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-14 17:04:33,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:04:33,525 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:04:33,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:04:33,526 INFO L85 PathProgramCache]: Analyzing trace with hash -747739269, now seen corresponding path program 1 times [2021-12-14 17:04:33,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:04:33,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874323145] [2021-12-14 17:04:33,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:33,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:04:33,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:33,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:04:33,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:33,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:33,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:33,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:04:33,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:33,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:04:33,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:33,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-14 17:04:33,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:33,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 17:04:33,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:33,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 17:04:33,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:33,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-14 17:04:33,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:33,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 17:04:33,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:33,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-14 17:04:34,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:34,139 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-14 17:04:34,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:04:34,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874323145] [2021-12-14 17:04:34,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874323145] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:04:34,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591809990] [2021-12-14 17:04:34,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:34,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:04:34,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:04:34,141 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) [2021-12-14 17:04:34,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 17:04:34,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:34,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 2563 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-14 17:04:34,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:04:35,555 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 31 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-14 17:04:35,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:04:35,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591809990] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:04:35,808 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 17:04:35,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 26 [2021-12-14 17:04:35,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390329930] [2021-12-14 17:04:35,808 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 17:04:35,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-14 17:04:35,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:04:35,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-14 17:04:35,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-12-14 17:04:35,809 INFO L87 Difference]: Start difference. First operand 158 states and 202 transitions. Second operand has 26 states, 24 states have (on average 3.7083333333333335) internal successors, (89), 24 states have internal predecessors, (89), 12 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (20), 9 states have call predecessors, (20), 9 states have call successors, (20) [2021-12-14 17:04:37,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:04:37,032 INFO L93 Difference]: Finished difference Result 280 states and 356 transitions. [2021-12-14 17:04:37,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-14 17:04:37,033 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 3.7083333333333335) internal successors, (89), 24 states have internal predecessors, (89), 12 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (20), 9 states have call predecessors, (20), 9 states have call successors, (20) Word has length 87 [2021-12-14 17:04:37,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:04:37,049 INFO L225 Difference]: With dead ends: 280 [2021-12-14 17:04:37,049 INFO L226 Difference]: Without dead ends: 197 [2021-12-14 17:04:37,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 117 SyntacticMatches, 15 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=261, Invalid=1809, Unknown=0, NotChecked=0, Total=2070 [2021-12-14 17:04:37,064 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 134 mSDsluCounter, 1057 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 1175 SdHoareTripleChecker+Invalid, 1127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 281 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 17:04:37,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 1175 Invalid, 1127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 806 Invalid, 0 Unknown, 281 Unchecked, 0.6s Time] [2021-12-14 17:04:37,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-12-14 17:04:37,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 172. [2021-12-14 17:04:37,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 116 states have (on average 1.0775862068965518) internal successors, (125), 118 states have internal predecessors, (125), 38 states have call successors, (38), 17 states have call predecessors, (38), 17 states have return successors, (46), 36 states have call predecessors, (46), 36 states have call successors, (46) [2021-12-14 17:04:37,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 209 transitions. [2021-12-14 17:04:37,072 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 209 transitions. Word has length 87 [2021-12-14 17:04:37,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:04:37,072 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 209 transitions. [2021-12-14 17:04:37,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 3.7083333333333335) internal successors, (89), 24 states have internal predecessors, (89), 12 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (20), 9 states have call predecessors, (20), 9 states have call successors, (20) [2021-12-14 17:04:37,072 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 209 transitions. [2021-12-14 17:04:37,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-14 17:04:37,073 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:04:37,073 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:04:37,113 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-14 17:04:37,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:04:37,294 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:04:37,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:04:37,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1592554973, now seen corresponding path program 2 times [2021-12-14 17:04:37,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:04:37,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653487030] [2021-12-14 17:04:37,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:37,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:04:37,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:37,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:04:37,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:37,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:37,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:37,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:04:37,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:37,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 17:04:37,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:37,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 17:04:37,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:37,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 17:04:37,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:37,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 17:04:37,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:37,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 17:04:37,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:37,544 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-14 17:04:37,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:04:37,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653487030] [2021-12-14 17:04:37,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653487030] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:04:37,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407834332] [2021-12-14 17:04:37,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 17:04:37,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:04:37,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:04:37,546 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) [2021-12-14 17:04:37,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-14 17:04:37,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-14 17:04:37,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 17:04:37,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 2326 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-14 17:04:37,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:04:38,275 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-14 17:04:38,275 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:04:38,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407834332] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:04:38,276 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:04:38,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 17 [2021-12-14 17:04:38,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016383425] [2021-12-14 17:04:38,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:04:38,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 17:04:38,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:04:38,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 17:04:38,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-12-14 17:04:38,277 INFO L87 Difference]: Start difference. First operand 172 states and 209 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 17:04:38,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:04:38,335 INFO L93 Difference]: Finished difference Result 247 states and 310 transitions. [2021-12-14 17:04:38,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 17:04:38,336 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 85 [2021-12-14 17:04:38,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:04:38,337 INFO L225 Difference]: With dead ends: 247 [2021-12-14 17:04:38,337 INFO L226 Difference]: Without dead ends: 189 [2021-12-14 17:04:38,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-12-14 17:04:38,338 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 13 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:04:38,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 513 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 106 Unchecked, 0.0s Time] [2021-12-14 17:04:38,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-12-14 17:04:38,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 182. [2021-12-14 17:04:38,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 125 states have (on average 1.096) internal successors, (137), 127 states have internal predecessors, (137), 39 states have call successors, (39), 18 states have call predecessors, (39), 17 states have return successors, (48), 36 states have call predecessors, (48), 37 states have call successors, (48) [2021-12-14 17:04:38,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 224 transitions. [2021-12-14 17:04:38,345 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 224 transitions. Word has length 85 [2021-12-14 17:04:38,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:04:38,346 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 224 transitions. [2021-12-14 17:04:38,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 17:04:38,346 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 224 transitions. [2021-12-14 17:04:38,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-14 17:04:38,347 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:04:38,347 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:04:38,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-14 17:04:38,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-14 17:04:38,567 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:04:38,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:04:38,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1017939094, now seen corresponding path program 1 times [2021-12-14 17:04:38,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:04:38,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003855600] [2021-12-14 17:04:38,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:38,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:04:38,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:38,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:04:38,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:38,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:38,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:38,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:04:38,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:38,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 17:04:38,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:38,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 17:04:38,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:38,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 17:04:38,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:38,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 17:04:38,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:38,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 17:04:38,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:38,807 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-14 17:04:38,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:04:38,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003855600] [2021-12-14 17:04:38,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003855600] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:04:38,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:04:38,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-14 17:04:38,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012914872] [2021-12-14 17:04:38,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:04:38,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-14 17:04:38,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:04:38,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-14 17:04:38,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-12-14 17:04:38,809 INFO L87 Difference]: Start difference. First operand 182 states and 224 transitions. Second operand has 13 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-12-14 17:04:39,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:04:39,049 INFO L93 Difference]: Finished difference Result 190 states and 232 transitions. [2021-12-14 17:04:39,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 17:04:39,049 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 87 [2021-12-14 17:04:39,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:04:39,050 INFO L225 Difference]: With dead ends: 190 [2021-12-14 17:04:39,050 INFO L226 Difference]: Without dead ends: 188 [2021-12-14 17:04:39,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-12-14 17:04:39,051 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 38 mSDsluCounter, 993 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 1100 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:04:39,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 1100 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 17:04:39,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-12-14 17:04:39,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2021-12-14 17:04:39,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 128 states have (on average 1.09375) internal successors, (140), 130 states have internal predecessors, (140), 40 states have call successors, (40), 19 states have call predecessors, (40), 18 states have return successors, (49), 37 states have call predecessors, (49), 38 states have call successors, (49) [2021-12-14 17:04:39,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 229 transitions. [2021-12-14 17:04:39,061 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 229 transitions. Word has length 87 [2021-12-14 17:04:39,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:04:39,061 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 229 transitions. [2021-12-14 17:04:39,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-12-14 17:04:39,062 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 229 transitions. [2021-12-14 17:04:39,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-14 17:04:39,062 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:04:39,063 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:04:39,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 17:04:39,063 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:04:39,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:04:39,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1557782801, now seen corresponding path program 1 times [2021-12-14 17:04:39,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:04:39,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812369751] [2021-12-14 17:04:39,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:39,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:04:39,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:39,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:04:39,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:39,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:39,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:39,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:04:39,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:39,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 17:04:39,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:39,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 17:04:39,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:39,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 17:04:39,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:39,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 17:04:39,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:39,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-14 17:04:39,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:39,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-14 17:04:39,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:39,449 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-14 17:04:39,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:04:39,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812369751] [2021-12-14 17:04:39,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812369751] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:04:39,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373273806] [2021-12-14 17:04:39,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:39,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:04:39,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:04:39,451 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) [2021-12-14 17:04:39,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-14 17:04:39,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:39,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 2603 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-14 17:04:39,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:04:40,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-12-14 17:04:40,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-12-14 17:04:40,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-12-14 17:04:40,486 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-14 17:04:40,486 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:04:40,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373273806] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:04:40,487 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:04:40,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [11] total 23 [2021-12-14 17:04:40,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249393106] [2021-12-14 17:04:40,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:04:40,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 17:04:40,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:04:40,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 17:04:40,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-12-14 17:04:40,488 INFO L87 Difference]: Start difference. First operand 187 states and 229 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 12 states have internal predecessors, (59), 3 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-14 17:04:41,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:04:41,109 INFO L93 Difference]: Finished difference Result 357 states and 443 transitions. [2021-12-14 17:04:41,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-14 17:04:41,110 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 12 states have internal predecessors, (59), 3 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 91 [2021-12-14 17:04:41,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:04:41,111 INFO L225 Difference]: With dead ends: 357 [2021-12-14 17:04:41,111 INFO L226 Difference]: Without dead ends: 239 [2021-12-14 17:04:41,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=196, Invalid=796, Unknown=0, NotChecked=0, Total=992 [2021-12-14 17:04:41,112 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 103 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 17:04:41,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 606 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 354 Invalid, 0 Unknown, 80 Unchecked, 0.3s Time] [2021-12-14 17:04:41,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-12-14 17:04:41,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 224. [2021-12-14 17:04:41,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 159 states have (on average 1.10062893081761) internal successors, (175), 162 states have internal predecessors, (175), 41 states have call successors, (41), 22 states have call predecessors, (41), 23 states have return successors, (51), 39 states have call predecessors, (51), 39 states have call successors, (51) [2021-12-14 17:04:41,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 267 transitions. [2021-12-14 17:04:41,120 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 267 transitions. Word has length 91 [2021-12-14 17:04:41,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:04:41,121 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 267 transitions. [2021-12-14 17:04:41,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 12 states have internal predecessors, (59), 3 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-14 17:04:41,121 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 267 transitions. [2021-12-14 17:04:41,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-14 17:04:41,122 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:04:41,122 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:04:41,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-14 17:04:41,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-14 17:04:41,341 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:04:41,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:04:41,342 INFO L85 PathProgramCache]: Analyzing trace with hash 590432147, now seen corresponding path program 1 times [2021-12-14 17:04:41,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:04:41,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429345935] [2021-12-14 17:04:41,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:41,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:04:41,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:41,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:04:41,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:41,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:41,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:41,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:04:41,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:41,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 17:04:41,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:41,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 17:04:41,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:41,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 17:04:41,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:41,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 17:04:41,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:41,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-14 17:04:41,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:41,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-14 17:04:41,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:41,458 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-14 17:04:41,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:04:41,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429345935] [2021-12-14 17:04:41,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429345935] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:04:41,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428484147] [2021-12-14 17:04:41,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:41,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:04:41,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:04:41,459 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) [2021-12-14 17:04:41,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-14 17:04:41,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:41,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 2598 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 17:04:41,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:04:41,941 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-14 17:04:41,941 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:04:41,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428484147] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:04:41,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:04:41,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-12-14 17:04:41,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972001370] [2021-12-14 17:04:41,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:04:41,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:04:41,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:04:41,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:04:41,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 17:04:41,943 INFO L87 Difference]: Start difference. First operand 224 states and 267 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-14 17:04:41,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:04:41,964 INFO L93 Difference]: Finished difference Result 344 states and 427 transitions. [2021-12-14 17:04:41,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:04:41,965 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 91 [2021-12-14 17:04:41,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:04:41,966 INFO L225 Difference]: With dead ends: 344 [2021-12-14 17:04:41,966 INFO L226 Difference]: Without dead ends: 217 [2021-12-14 17:04:41,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:04:41,967 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 6 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:04:41,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 318 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:04:41,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-12-14 17:04:41,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 214. [2021-12-14 17:04:41,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 151 states have (on average 1.0794701986754967) internal successors, (163), 154 states have internal predecessors, (163), 40 states have call successors, (40), 22 states have call predecessors, (40), 22 states have return successors, (49), 37 states have call predecessors, (49), 38 states have call successors, (49) [2021-12-14 17:04:41,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 252 transitions. [2021-12-14 17:04:41,974 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 252 transitions. Word has length 91 [2021-12-14 17:04:41,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:04:41,975 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 252 transitions. [2021-12-14 17:04:41,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-14 17:04:41,975 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 252 transitions. [2021-12-14 17:04:41,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-14 17:04:41,976 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:04:41,976 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:04:41,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-14 17:04:42,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-14 17:04:42,195 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:04:42,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:04:42,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1187805753, now seen corresponding path program 1 times [2021-12-14 17:04:42,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:04:42,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066438281] [2021-12-14 17:04:42,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:42,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:04:42,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:42,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:04:42,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:42,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:42,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:42,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:04:42,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:42,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:04:42,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:42,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:04:42,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:42,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:04:42,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:42,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:42,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:42,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:04:42,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:42,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:04:42,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:42,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:04:42,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:42,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:04:42,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:42,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-14 17:04:42,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:42,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-14 17:04:42,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:42,373 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-14 17:04:42,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:04:42,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066438281] [2021-12-14 17:04:42,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066438281] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:04:42,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:04:42,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 17:04:42,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506625295] [2021-12-14 17:04:42,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:04:42,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 17:04:42,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:04:42,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 17:04:42,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-14 17:04:42,376 INFO L87 Difference]: Start difference. First operand 214 states and 252 transitions. Second operand has 9 states, 8 states have (on average 5.125) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-12-14 17:04:42,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:04:42,644 INFO L93 Difference]: Finished difference Result 222 states and 260 transitions. [2021-12-14 17:04:42,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 17:04:42,644 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.125) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 100 [2021-12-14 17:04:42,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:04:42,645 INFO L225 Difference]: With dead ends: 222 [2021-12-14 17:04:42,645 INFO L226 Difference]: Without dead ends: 220 [2021-12-14 17:04:42,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-12-14 17:04:42,646 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 51 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 17:04:42,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 523 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 17:04:42,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-12-14 17:04:42,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 219. [2021-12-14 17:04:42,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 154 states have (on average 1.077922077922078) internal successors, (166), 157 states have internal predecessors, (166), 41 states have call successors, (41), 23 states have call predecessors, (41), 23 states have return successors, (50), 38 states have call predecessors, (50), 39 states have call successors, (50) [2021-12-14 17:04:42,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 257 transitions. [2021-12-14 17:04:42,656 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 257 transitions. Word has length 100 [2021-12-14 17:04:42,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:04:42,656 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 257 transitions. [2021-12-14 17:04:42,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.125) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-12-14 17:04:42,656 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 257 transitions. [2021-12-14 17:04:42,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-14 17:04:42,657 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:04:42,657 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:04:42,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-14 17:04:42,658 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:04:42,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:04:42,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1853194988, now seen corresponding path program 1 times [2021-12-14 17:04:42,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:04:42,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960411068] [2021-12-14 17:04:42,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:42,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:04:42,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:42,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:04:42,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:42,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:42,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:42,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:04:42,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:43,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 17:04:43,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:43,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:04:43,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:43,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 17:04:43,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:43,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-14 17:04:43,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:43,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 17:04:43,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:43,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-14 17:04:43,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:43,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-14 17:04:43,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:43,068 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-12-14 17:04:43,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:04:43,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960411068] [2021-12-14 17:04:43,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960411068] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:04:43,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171391603] [2021-12-14 17:04:43,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:43,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:04:43,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:04:43,070 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) [2021-12-14 17:04:43,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-14 17:04:43,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:43,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 2648 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-14 17:04:43,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:04:43,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 17:04:43,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 17:04:43,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-14 17:04:43,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-14 17:04:43,774 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-14 17:04:43,774 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:04:43,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171391603] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:04:43,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:04:43,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 13 [2021-12-14 17:04:43,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304319275] [2021-12-14 17:04:43,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:04:43,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 17:04:43,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:04:43,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 17:04:43,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-12-14 17:04:43,775 INFO L87 Difference]: Start difference. First operand 219 states and 257 transitions. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 4 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-14 17:04:43,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:04:43,877 INFO L93 Difference]: Finished difference Result 386 states and 467 transitions. [2021-12-14 17:04:43,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 17:04:43,877 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 4 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 98 [2021-12-14 17:04:43,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:04:43,878 INFO L225 Difference]: With dead ends: 386 [2021-12-14 17:04:43,878 INFO L226 Difference]: Without dead ends: 249 [2021-12-14 17:04:43,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 113 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-12-14 17:04:43,879 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 39 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:04:43,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 610 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 94 Invalid, 0 Unknown, 24 Unchecked, 0.1s Time] [2021-12-14 17:04:43,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-12-14 17:04:43,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 234. [2021-12-14 17:04:43,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 165 states have (on average 1.0727272727272728) internal successors, (177), 169 states have internal predecessors, (177), 43 states have call successors, (43), 25 states have call predecessors, (43), 25 states have return successors, (52), 39 states have call predecessors, (52), 41 states have call successors, (52) [2021-12-14 17:04:43,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 272 transitions. [2021-12-14 17:04:43,889 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 272 transitions. Word has length 98 [2021-12-14 17:04:43,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:04:43,889 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 272 transitions. [2021-12-14 17:04:43,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 4 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-14 17:04:43,889 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 272 transitions. [2021-12-14 17:04:43,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-14 17:04:43,890 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:04:43,890 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:04:43,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-14 17:04:44,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-14 17:04:44,105 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:04:44,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:04:44,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1946355713, now seen corresponding path program 1 times [2021-12-14 17:04:44,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:04:44,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513383685] [2021-12-14 17:04:44,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:44,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:04:44,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:44,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:04:44,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:44,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:44,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:44,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:04:44,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:44,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:04:44,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:44,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:04:44,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:44,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:04:44,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:44,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:44,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:44,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:04:44,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:44,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:04:44,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:44,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:04:44,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:44,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:04:44,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:44,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-14 17:04:44,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:44,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-14 17:04:44,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:44,542 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 22 proven. 23 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-14 17:04:44,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:04:44,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513383685] [2021-12-14 17:04:44,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513383685] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:04:44,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204058081] [2021-12-14 17:04:44,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:44,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:04:44,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:04:44,544 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) [2021-12-14 17:04:44,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-14 17:04:44,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:44,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 2618 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-14 17:04:44,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:04:45,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 17:04:45,489 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 32 proven. 30 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-14 17:04:45,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:04:45,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204058081] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:04:45,711 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 17:04:45,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 27 [2021-12-14 17:04:45,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600013775] [2021-12-14 17:04:45,712 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 17:04:45,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-14 17:04:45,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:04:45,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-14 17:04:45,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-12-14 17:04:45,713 INFO L87 Difference]: Start difference. First operand 234 states and 272 transitions. Second operand has 27 states, 27 states have (on average 3.185185185185185) internal successors, (86), 26 states have internal predecessors, (86), 12 states have call successors, (27), 5 states have call predecessors, (27), 7 states have return successors, (26), 11 states have call predecessors, (26), 11 states have call successors, (26) [2021-12-14 17:04:47,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:04:47,398 INFO L93 Difference]: Finished difference Result 386 states and 476 transitions. [2021-12-14 17:04:47,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-14 17:04:47,399 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.185185185185185) internal successors, (86), 26 states have internal predecessors, (86), 12 states have call successors, (27), 5 states have call predecessors, (27), 7 states have return successors, (26), 11 states have call predecessors, (26), 11 states have call successors, (26) Word has length 104 [2021-12-14 17:04:47,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:04:47,400 INFO L225 Difference]: With dead ends: 386 [2021-12-14 17:04:47,400 INFO L226 Difference]: Without dead ends: 302 [2021-12-14 17:04:47,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 139 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=381, Invalid=2699, Unknown=0, NotChecked=0, Total=3080 [2021-12-14 17:04:47,402 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 267 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 1570 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 2090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 359 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:04:47,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 481 Invalid, 2090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1570 Invalid, 0 Unknown, 359 Unchecked, 1.0s Time] [2021-12-14 17:04:47,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-12-14 17:04:47,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 251. [2021-12-14 17:04:47,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 172 states have (on average 1.069767441860465) internal successors, (184), 177 states have internal predecessors, (184), 51 states have call successors, (51), 25 states have call predecessors, (51), 27 states have return successors, (66), 48 states have call predecessors, (66), 49 states have call successors, (66) [2021-12-14 17:04:47,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 301 transitions. [2021-12-14 17:04:47,413 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 301 transitions. Word has length 104 [2021-12-14 17:04:47,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:04:47,414 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 301 transitions. [2021-12-14 17:04:47,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.185185185185185) internal successors, (86), 26 states have internal predecessors, (86), 12 states have call successors, (27), 5 states have call predecessors, (27), 7 states have return successors, (26), 11 states have call predecessors, (26), 11 states have call successors, (26) [2021-12-14 17:04:47,414 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 301 transitions. [2021-12-14 17:04:47,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-14 17:04:47,415 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:04:47,415 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:04:47,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-14 17:04:47,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:04:47,632 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:04:47,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:04:47,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1261447352, now seen corresponding path program 1 times [2021-12-14 17:04:47,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:04:47,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485551279] [2021-12-14 17:04:47,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:47,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:04:48,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:48,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:04:48,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:48,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:48,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:48,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:04:48,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:48,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:04:48,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:48,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:04:48,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:48,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 17:04:48,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:48,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 17:04:48,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:48,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-14 17:04:48,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:48,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-14 17:04:48,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:48,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-14 17:04:48,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:48,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 17:04:48,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:48,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-14 17:04:48,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:48,738 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-14 17:04:48,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:04:48,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485551279] [2021-12-14 17:04:48,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485551279] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:04:48,739 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:04:48,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-14 17:04:48,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129201788] [2021-12-14 17:04:48,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:04:48,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-14 17:04:48,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:04:48,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-14 17:04:48,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-12-14 17:04:48,740 INFO L87 Difference]: Start difference. First operand 251 states and 301 transitions. Second operand has 19 states, 18 states have (on average 3.111111111111111) internal successors, (56), 16 states have internal predecessors, (56), 8 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-14 17:04:49,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:04:49,605 INFO L93 Difference]: Finished difference Result 369 states and 462 transitions. [2021-12-14 17:04:49,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-14 17:04:49,606 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.111111111111111) internal successors, (56), 16 states have internal predecessors, (56), 8 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) Word has length 109 [2021-12-14 17:04:49,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:04:49,607 INFO L225 Difference]: With dead ends: 369 [2021-12-14 17:04:49,607 INFO L226 Difference]: Without dead ends: 301 [2021-12-14 17:04:49,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2021-12-14 17:04:49,608 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 107 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 1431 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 1498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 17:04:49,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 660 Invalid, 1498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1431 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 17:04:49,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-12-14 17:04:49,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 262. [2021-12-14 17:04:49,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 179 states have (on average 1.0670391061452513) internal successors, (191), 185 states have internal predecessors, (191), 53 states have call successors, (53), 25 states have call predecessors, (53), 29 states have return successors, (77), 51 states have call predecessors, (77), 51 states have call successors, (77) [2021-12-14 17:04:49,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 321 transitions. [2021-12-14 17:04:49,624 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 321 transitions. Word has length 109 [2021-12-14 17:04:49,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:04:49,625 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 321 transitions. [2021-12-14 17:04:49,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.111111111111111) internal successors, (56), 16 states have internal predecessors, (56), 8 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-14 17:04:49,625 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 321 transitions. [2021-12-14 17:04:49,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-14 17:04:49,626 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:04:49,626 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:04:49,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-14 17:04:49,626 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:04:49,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:04:49,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1003281914, now seen corresponding path program 1 times [2021-12-14 17:04:49,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:04:49,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629096594] [2021-12-14 17:04:49,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:49,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:04:49,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:49,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:04:49,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:49,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:49,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:49,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:04:49,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:49,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:04:49,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:49,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:04:49,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:49,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 17:04:49,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:49,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 17:04:49,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:49,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-14 17:04:49,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:49,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-14 17:04:49,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:49,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-14 17:04:49,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:49,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 17:04:49,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:49,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-14 17:04:49,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:49,803 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-12-14 17:04:49,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:04:49,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629096594] [2021-12-14 17:04:49,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629096594] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:04:49,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:04:49,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 17:04:49,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008308055] [2021-12-14 17:04:49,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:04:49,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 17:04:49,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:04:49,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 17:04:49,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:04:49,804 INFO L87 Difference]: Start difference. First operand 262 states and 321 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2021-12-14 17:04:49,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:04:49,936 INFO L93 Difference]: Finished difference Result 338 states and 424 transitions. [2021-12-14 17:04:49,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:04:49,936 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) Word has length 109 [2021-12-14 17:04:49,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:04:49,938 INFO L225 Difference]: With dead ends: 338 [2021-12-14 17:04:49,938 INFO L226 Difference]: Without dead ends: 254 [2021-12-14 17:04:49,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 17:04:49,938 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 43 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:04:49,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 250 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 17:04:49,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-12-14 17:04:49,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2021-12-14 17:04:49,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 173 states have (on average 1.0635838150289016) internal successors, (184), 178 states have internal predecessors, (184), 52 states have call successors, (52), 25 states have call predecessors, (52), 28 states have return successors, (68), 50 states have call predecessors, (68), 50 states have call successors, (68) [2021-12-14 17:04:49,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 304 transitions. [2021-12-14 17:04:49,955 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 304 transitions. Word has length 109 [2021-12-14 17:04:49,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:04:49,955 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 304 transitions. [2021-12-14 17:04:49,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2021-12-14 17:04:49,955 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 304 transitions. [2021-12-14 17:04:49,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-14 17:04:49,956 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:04:49,956 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:04:49,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-14 17:04:49,956 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:04:49,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:04:49,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1112110986, now seen corresponding path program 1 times [2021-12-14 17:04:49,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:04:49,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542170335] [2021-12-14 17:04:49,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:49,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:04:50,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:50,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:04:50,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:50,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:50,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:50,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:04:50,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:50,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:04:50,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:50,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:04:50,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:50,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 17:04:50,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:50,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 17:04:50,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:50,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-14 17:04:50,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:50,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-14 17:04:50,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:50,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-14 17:04:50,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:50,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 17:04:50,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:50,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 17:04:50,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:50,636 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-14 17:04:50,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:04:50,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542170335] [2021-12-14 17:04:50,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542170335] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:04:50,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729245841] [2021-12-14 17:04:50,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:50,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:04:50,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:04:50,652 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) [2021-12-14 17:04:50,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-14 17:04:51,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:51,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 2720 conjuncts, 86 conjunts are in the unsatisfiable core [2021-12-14 17:04:51,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:04:51,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 17:04:51,278 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-12-14 17:04:51,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 9 [2021-12-14 17:04:51,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 17:04:51,643 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-12-14 17:04:51,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2021-12-14 17:04:51,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-14 17:04:53,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-14 17:05:02,211 INFO L354 Elim1Store]: treesize reduction 21, result has 46.2 percent of original size [2021-12-14 17:05:02,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-12-14 17:05:02,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-14 17:05:02,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2021-12-14 17:05:04,571 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 30 proven. 55 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-14 17:05:04,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:05:05,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729245841] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:05:05,573 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 17:05:05,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 36 [2021-12-14 17:05:05,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036085093] [2021-12-14 17:05:05,573 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 17:05:05,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-14 17:05:05,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:05:05,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-14 17:05:05,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1549, Unknown=2, NotChecked=0, Total=1722 [2021-12-14 17:05:05,574 INFO L87 Difference]: Start difference. First operand 254 states and 304 transitions. Second operand has 36 states, 34 states have (on average 3.6176470588235294) internal successors, (123), 31 states have internal predecessors, (123), 14 states have call successors, (26), 9 states have call predecessors, (26), 7 states have return successors, (23), 14 states have call predecessors, (23), 11 states have call successors, (23) [2021-12-14 17:05:06,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:05:06,765 INFO L93 Difference]: Finished difference Result 343 states and 404 transitions. [2021-12-14 17:05:06,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-14 17:05:06,765 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 3.6176470588235294) internal successors, (123), 31 states have internal predecessors, (123), 14 states have call successors, (26), 9 states have call predecessors, (26), 7 states have return successors, (23), 14 states have call predecessors, (23), 11 states have call successors, (23) Word has length 112 [2021-12-14 17:05:06,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:05:06,766 INFO L225 Difference]: With dead ends: 343 [2021-12-14 17:05:06,766 INFO L226 Difference]: Without dead ends: 280 [2021-12-14 17:05:06,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 126 SyntacticMatches, 18 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=317, Invalid=3103, Unknown=2, NotChecked=0, Total=3422 [2021-12-14 17:05:06,768 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 131 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 1217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 383 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 17:05:06,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 1017 Invalid, 1217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 773 Invalid, 0 Unknown, 383 Unchecked, 0.4s Time] [2021-12-14 17:05:06,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-12-14 17:05:06,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 277. [2021-12-14 17:05:06,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 194 states have (on average 1.0670103092783505) internal successors, (207), 199 states have internal predecessors, (207), 51 states have call successors, (51), 28 states have call predecessors, (51), 31 states have return successors, (66), 49 states have call predecessors, (66), 49 states have call successors, (66) [2021-12-14 17:05:06,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 324 transitions. [2021-12-14 17:05:06,780 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 324 transitions. Word has length 112 [2021-12-14 17:05:06,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:05:06,780 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 324 transitions. [2021-12-14 17:05:06,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 3.6176470588235294) internal successors, (123), 31 states have internal predecessors, (123), 14 states have call successors, (26), 9 states have call predecessors, (26), 7 states have return successors, (23), 14 states have call predecessors, (23), 11 states have call successors, (23) [2021-12-14 17:05:06,780 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 324 transitions. [2021-12-14 17:05:06,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-14 17:05:06,781 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:05:06,781 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:05:06,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-14 17:05:07,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-14 17:05:07,001 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:05:07,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:05:07,002 INFO L85 PathProgramCache]: Analyzing trace with hash 634770534, now seen corresponding path program 1 times [2021-12-14 17:05:07,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:05:07,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633046955] [2021-12-14 17:05:07,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:05:07,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:05:07,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:07,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:05:07,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:07,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:05:07,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:07,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:05:07,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:07,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:05:07,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:07,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:05:07,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:07,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:05:07,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:07,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:05:07,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:07,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:05:07,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:07,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:05:07,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:07,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:05:07,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:07,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:05:07,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:07,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-14 17:05:07,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:07,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-14 17:05:07,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:07,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 17:05:07,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:07,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-14 17:05:07,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:07,187 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-12-14 17:05:07,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:05:07,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633046955] [2021-12-14 17:05:07,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633046955] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:05:07,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:05:07,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 17:05:07,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442194855] [2021-12-14 17:05:07,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:05:07,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 17:05:07,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:05:07,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 17:05:07,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-14 17:05:07,188 INFO L87 Difference]: Start difference. First operand 277 states and 324 transitions. Second operand has 9 states, 8 states have (on average 5.375) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-12-14 17:05:07,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:05:07,447 INFO L93 Difference]: Finished difference Result 285 states and 332 transitions. [2021-12-14 17:05:07,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 17:05:07,448 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.375) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 115 [2021-12-14 17:05:07,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:05:07,449 INFO L225 Difference]: With dead ends: 285 [2021-12-14 17:05:07,449 INFO L226 Difference]: Without dead ends: 283 [2021-12-14 17:05:07,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-12-14 17:05:07,450 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 49 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 17:05:07,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 522 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 17:05:07,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-12-14 17:05:07,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 282. [2021-12-14 17:05:07,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 197 states have (on average 1.0659898477157361) internal successors, (210), 202 states have internal predecessors, (210), 52 states have call successors, (52), 29 states have call predecessors, (52), 32 states have return successors, (67), 50 states have call predecessors, (67), 50 states have call successors, (67) [2021-12-14 17:05:07,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 329 transitions. [2021-12-14 17:05:07,461 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 329 transitions. Word has length 115 [2021-12-14 17:05:07,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:05:07,462 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 329 transitions. [2021-12-14 17:05:07,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.375) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-12-14 17:05:07,462 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 329 transitions. [2021-12-14 17:05:07,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-14 17:05:07,463 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:05:07,463 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:05:07,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-14 17:05:07,463 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:05:07,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:05:07,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1393736786, now seen corresponding path program 1 times [2021-12-14 17:05:07,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:05:07,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293118568] [2021-12-14 17:05:07,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:05:07,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:05:07,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:07,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:05:07,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:07,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:05:07,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:07,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:05:07,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:07,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:05:07,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:07,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:05:07,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:07,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:05:07,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:07,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:05:07,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:07,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:05:07,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:07,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:05:07,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:07,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:05:07,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:07,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:05:07,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:07,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-14 17:05:07,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:07,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-14 17:05:07,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:07,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 17:05:07,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:07,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-14 17:05:07,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:07,760 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 30 proven. 29 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-12-14 17:05:07,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:05:07,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293118568] [2021-12-14 17:05:07,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293118568] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:05:07,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130817430] [2021-12-14 17:05:07,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:05:07,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:05:07,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:05:07,772 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) [2021-12-14 17:05:07,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-14 17:05:08,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:08,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 2655 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-14 17:05:08,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:05:08,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 17:05:08,762 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 70 proven. 36 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-14 17:05:08,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:05:09,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130817430] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:05:09,006 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 17:05:09,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-12-14 17:05:09,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487547697] [2021-12-14 17:05:09,006 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 17:05:09,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-14 17:05:09,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:05:09,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-14 17:05:09,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-12-14 17:05:09,007 INFO L87 Difference]: Start difference. First operand 282 states and 329 transitions. Second operand has 20 states, 20 states have (on average 4.55) internal successors, (91), 19 states have internal predecessors, (91), 7 states have call successors, (24), 5 states have call predecessors, (24), 6 states have return successors, (23), 7 states have call predecessors, (23), 6 states have call successors, (23) [2021-12-14 17:05:10,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:05:10,140 INFO L93 Difference]: Finished difference Result 336 states and 388 transitions. [2021-12-14 17:05:10,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-14 17:05:10,141 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.55) internal successors, (91), 19 states have internal predecessors, (91), 7 states have call successors, (24), 5 states have call predecessors, (24), 6 states have return successors, (23), 7 states have call predecessors, (23), 6 states have call successors, (23) Word has length 119 [2021-12-14 17:05:10,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:05:10,143 INFO L225 Difference]: With dead ends: 336 [2021-12-14 17:05:10,143 INFO L226 Difference]: Without dead ends: 308 [2021-12-14 17:05:10,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 173 SyntacticMatches, 9 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=289, Invalid=1193, Unknown=0, NotChecked=0, Total=1482 [2021-12-14 17:05:10,144 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 198 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 1340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 385 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 17:05:10,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 434 Invalid, 1340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 869 Invalid, 0 Unknown, 385 Unchecked, 0.6s Time] [2021-12-14 17:05:10,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-12-14 17:05:10,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 297. [2021-12-14 17:05:10,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 208 states have (on average 1.0625) internal successors, (221), 213 states have internal predecessors, (221), 54 states have call successors, (54), 31 states have call predecessors, (54), 34 states have return successors, (69), 52 states have call predecessors, (69), 52 states have call successors, (69) [2021-12-14 17:05:10,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 344 transitions. [2021-12-14 17:05:10,157 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 344 transitions. Word has length 119 [2021-12-14 17:05:10,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:05:10,158 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 344 transitions. [2021-12-14 17:05:10,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.55) internal successors, (91), 19 states have internal predecessors, (91), 7 states have call successors, (24), 5 states have call predecessors, (24), 6 states have return successors, (23), 7 states have call predecessors, (23), 6 states have call successors, (23) [2021-12-14 17:05:10,158 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 344 transitions. [2021-12-14 17:05:10,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-14 17:05:10,159 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:05:10,159 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:05:10,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-14 17:05:10,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:05:10,377 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:05:10,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:05:10,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1305766989, now seen corresponding path program 1 times [2021-12-14 17:05:10,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:05:10,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119524745] [2021-12-14 17:05:10,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:05:10,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:05:10,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:10,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:05:10,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:10,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:05:10,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:10,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:05:10,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:10,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:05:10,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:10,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:05:10,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:10,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:05:10,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:10,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:05:10,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:10,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:05:10,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:10,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:05:10,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:10,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:05:10,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:10,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:05:10,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:10,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-14 17:05:10,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:10,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-14 17:05:10,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:10,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 17:05:10,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:10,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-14 17:05:10,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:10,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-14 17:05:10,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:10,729 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-14 17:05:10,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:05:10,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119524745] [2021-12-14 17:05:10,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119524745] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:05:10,730 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:05:10,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 17:05:10,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198592851] [2021-12-14 17:05:10,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:05:10,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 17:05:10,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:05:10,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 17:05:10,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-14 17:05:10,734 INFO L87 Difference]: Start difference. First operand 297 states and 344 transitions. Second operand has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 5 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-12-14 17:05:11,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:05:11,309 INFO L93 Difference]: Finished difference Result 314 states and 362 transitions. [2021-12-14 17:05:11,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 17:05:11,309 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 5 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 125 [2021-12-14 17:05:11,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:05:11,311 INFO L225 Difference]: With dead ends: 314 [2021-12-14 17:05:11,311 INFO L226 Difference]: Without dead ends: 208 [2021-12-14 17:05:11,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-12-14 17:05:11,312 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 46 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 17:05:11,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 335 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 17:05:11,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-12-14 17:05:11,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 204. [2021-12-14 17:05:11,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 140 states have (on average 1.0785714285714285) internal successors, (151), 143 states have internal predecessors, (151), 41 states have call successors, (41), 20 states have call predecessors, (41), 22 states have return successors, (55), 40 states have call predecessors, (55), 39 states have call successors, (55) [2021-12-14 17:05:11,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 247 transitions. [2021-12-14 17:05:11,322 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 247 transitions. Word has length 125 [2021-12-14 17:05:11,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:05:11,322 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 247 transitions. [2021-12-14 17:05:11,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 5 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-12-14 17:05:11,322 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 247 transitions. [2021-12-14 17:05:11,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-14 17:05:11,323 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:05:11,323 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:05:11,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-14 17:05:11,323 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:05:11,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:05:11,324 INFO L85 PathProgramCache]: Analyzing trace with hash 816335728, now seen corresponding path program 1 times [2021-12-14 17:05:11,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:05:11,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566392978] [2021-12-14 17:05:11,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:05:11,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:05:11,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:11,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:05:11,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:11,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:05:11,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:11,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:05:11,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:11,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:05:11,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:11,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:05:11,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:11,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 17:05:11,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:11,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 17:05:11,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:11,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-14 17:05:11,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:11,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-14 17:05:11,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:11,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-14 17:05:11,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:11,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 17:05:11,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:11,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 17:05:11,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:11,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-14 17:05:11,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:11,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-14 17:05:11,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:11,696 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 30 proven. 11 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-14 17:05:11,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:05:11,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566392978] [2021-12-14 17:05:11,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566392978] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:05:11,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683252104] [2021-12-14 17:05:11,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:05:11,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:05:11,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:05:11,698 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) [2021-12-14 17:05:11,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-14 17:05:12,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:12,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 2752 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-14 17:05:12,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:05:12,596 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-14 17:05:12,596 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:05:12,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683252104] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:05:12,596 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:05:12,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 19 [2021-12-14 17:05:12,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161703190] [2021-12-14 17:05:12,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:05:12,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 17:05:12,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:05:12,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 17:05:12,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-12-14 17:05:12,598 INFO L87 Difference]: Start difference. First operand 204 states and 247 transitions. Second operand has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-14 17:05:12,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:05:12,714 INFO L93 Difference]: Finished difference Result 332 states and 397 transitions. [2021-12-14 17:05:12,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 17:05:12,714 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) Word has length 126 [2021-12-14 17:05:12,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:05:12,716 INFO L225 Difference]: With dead ends: 332 [2021-12-14 17:05:12,717 INFO L226 Difference]: Without dead ends: 253 [2021-12-14 17:05:12,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 142 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-12-14 17:05:12,718 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 16 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:05:12,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 581 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 117 Unchecked, 0.1s Time] [2021-12-14 17:05:12,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-12-14 17:05:12,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 243. [2021-12-14 17:05:12,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 169 states have (on average 1.0769230769230769) internal successors, (182), 174 states have internal predecessors, (182), 46 states have call successors, (46), 24 states have call predecessors, (46), 27 states have return successors, (61), 44 states have call predecessors, (61), 44 states have call successors, (61) [2021-12-14 17:05:12,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 289 transitions. [2021-12-14 17:05:12,730 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 289 transitions. Word has length 126 [2021-12-14 17:05:12,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:05:12,731 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 289 transitions. [2021-12-14 17:05:12,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-14 17:05:12,731 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 289 transitions. [2021-12-14 17:05:12,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-14 17:05:12,732 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:05:12,732 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:05:12,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-14 17:05:12,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-14 17:05:12,951 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:05:12,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:05:12,952 INFO L85 PathProgramCache]: Analyzing trace with hash 868973393, now seen corresponding path program 1 times [2021-12-14 17:05:12,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:05:12,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521851715] [2021-12-14 17:05:12,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:05:12,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:05:13,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:13,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:05:13,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:13,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:05:13,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:13,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:05:13,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:13,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:05:13,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:13,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:05:13,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:13,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 17:05:13,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:13,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 17:05:13,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:13,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-14 17:05:13,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:13,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-14 17:05:13,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:13,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-14 17:05:13,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:13,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 17:05:13,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:13,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-14 17:05:13,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:13,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-14 17:05:13,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:13,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-14 17:05:13,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:13,697 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 46 proven. 10 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-14 17:05:13,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:05:13,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521851715] [2021-12-14 17:05:13,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521851715] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:05:13,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590435261] [2021-12-14 17:05:13,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:05:13,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:05:13,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:05:13,704 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) [2021-12-14 17:05:13,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-14 17:05:14,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:14,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 2739 conjuncts, 84 conjunts are in the unsatisfiable core [2021-12-14 17:05:14,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:05:14,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 17:05:14,708 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-14 17:05:14,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-14 17:05:14,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-14 17:05:15,125 INFO L354 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2021-12-14 17:05:15,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 24 [2021-12-14 17:05:15,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2021-12-14 17:05:17,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27