./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_byte_cursor_right_trim_pred_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/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_right_trim_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 f85fffa00ce152c2185c303de3856b218143afacade5a3da3d11c284e86ce457 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 17:04:13,681 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 17:04:13,682 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 17:04:13,716 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 17:04:13,716 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 17:04:13,717 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 17:04:13,718 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 17:04:13,725 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 17:04:13,727 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 17:04:13,727 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 17:04:13,728 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 17:04:13,729 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 17:04:13,729 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 17:04:13,729 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 17:04:13,730 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 17:04:13,736 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 17:04:13,737 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 17:04:13,737 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 17:04:13,738 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 17:04:13,740 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 17:04:13,740 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 17:04:13,748 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 17:04:13,748 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 17:04:13,749 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 17:04:13,751 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 17:04:13,751 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 17:04:13,751 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 17:04:13,751 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 17:04:13,752 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 17:04:13,752 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 17:04:13,753 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 17:04:13,753 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 17:04:13,753 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 17:04:13,754 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 17:04:13,755 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 17:04:13,755 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 17:04:13,755 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 17:04:13,755 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 17:04:13,756 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 17:04:13,756 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 17:04:13,757 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 17:04:13,760 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-14 17:04:13,777 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 17:04:13,778 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 17:04:13,778 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 17:04:13,778 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 17:04:13,779 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 17:04:13,779 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 17:04:13,779 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 17:04:13,780 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 17:04:13,780 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 17:04:13,780 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 17:04:13,780 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 17:04:13,780 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 17:04:13,780 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 17:04:13,781 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 17:04:13,781 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 17:04:13,781 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 17:04:13,781 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 17:04:13,781 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 17:04:13,782 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 17:04:13,782 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 17:04:13,782 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 17:04:13,782 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 17:04:13,782 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 17:04:13,782 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 17:04:13,783 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 17:04:13,783 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 17:04:13,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 17:04:13,783 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 17:04:13,783 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 17:04:13,783 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 17:04:13,783 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 17:04:13,783 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f85fffa00ce152c2185c303de3856b218143afacade5a3da3d11c284e86ce457 [2021-12-14 17:04:13,967 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 17:04:13,987 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 17:04:13,990 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 17:04:13,991 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 17:04:13,992 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 17:04:13,992 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_byte_cursor_right_trim_pred_harness.i [2021-12-14 17:04:14,035 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0658eb59/a4b83f96fee44d318e50ae9452d820c4/FLAGe66bc2b72 [2021-12-14 17:04:14,656 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 17:04:14,657 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_cursor_right_trim_pred_harness.i [2021-12-14 17:04:14,690 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0658eb59/a4b83f96fee44d318e50ae9452d820c4/FLAGe66bc2b72 [2021-12-14 17:04:14,817 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0658eb59/a4b83f96fee44d318e50ae9452d820c4 [2021-12-14 17:04:14,819 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 17:04:14,820 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 17:04:14,821 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 17:04:14,821 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 17:04:14,823 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 17:04:14,824 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:04:14" (1/1) ... [2021-12-14 17:04:14,825 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d7ec4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:04:14, skipping insertion in model container [2021-12-14 17:04:14,826 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:04:14" (1/1) ... [2021-12-14 17:04:14,831 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 17:04:14,897 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 17:04:15,138 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_right_trim_pred_harness.i[4505,4518] [2021-12-14 17:04:15,144 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_right_trim_pred_harness.i[4565,4578] [2021-12-14 17:04:15,926 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:04:15,927 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:04:15,928 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:04:15,929 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:04:15,931 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:04:15,945 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:04:15,951 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:04:15,952 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:04:15,952 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:04:16,175 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-14 17:04:16,176 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-14 17:04:16,177 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-14 17:04:16,178 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-14 17:04:16,178 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-14 17:04:16,179 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-14 17:04:16,179 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-14 17:04:16,180 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-14 17:04:16,180 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-14 17:04:16,180 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-14 17:04:16,263 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-14 17:04:16,357 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:04:16,358 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:04:16,419 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 17:04:16,466 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 17:04:16,483 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_right_trim_pred_harness.i[4505,4518] [2021-12-14 17:04:16,484 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_right_trim_pred_harness.i[4565,4578] [2021-12-14 17:04:16,529 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:04:16,530 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:04:16,531 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:04:16,531 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:04:16,532 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:04:16,536 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:04:16,537 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:04:16,537 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:04:16,538 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:04:16,563 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-14 17:04:16,563 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-14 17:04:16,563 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-14 17:04:16,564 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-14 17:04:16,564 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-14 17:04:16,565 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-14 17:04:16,565 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-14 17:04:16,565 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-14 17:04:16,565 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-14 17:04:16,566 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-14 17:04:16,586 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-14 17:04:16,625 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:04:16,626 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:04:16,648 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 17:04:16,810 INFO L208 MainTranslator]: Completed translation [2021-12-14 17:04:16,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:04:16 WrapperNode [2021-12-14 17:04:16,811 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 17:04:16,812 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 17:04:16,812 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 17:04:16,812 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 17:04:16,817 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:04:16" (1/1) ... [2021-12-14 17:04:16,912 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:04:16" (1/1) ... [2021-12-14 17:04:16,965 INFO L137 Inliner]: procedures = 690, calls = 2620, calls flagged for inlining = 60, calls inlined = 8, statements flattened = 800 [2021-12-14 17:04:16,966 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 17:04:16,966 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 17:04:16,966 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 17:04:16,967 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 17:04:16,973 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:04:16" (1/1) ... [2021-12-14 17:04:16,973 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:04:16" (1/1) ... [2021-12-14 17:04:16,984 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:04:16" (1/1) ... [2021-12-14 17:04:16,984 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:04:16" (1/1) ... [2021-12-14 17:04:17,010 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:04:16" (1/1) ... [2021-12-14 17:04:17,024 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:04:16" (1/1) ... [2021-12-14 17:04:17,034 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:04:16" (1/1) ... [2021-12-14 17:04:17,045 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 17:04:17,046 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 17:04:17,047 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 17:04:17,047 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 17:04:17,048 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:04:16" (1/1) ... [2021-12-14 17:04:17,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 17:04:17,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:04:17,071 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 17:04:17,089 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 17:04:17,099 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2021-12-14 17:04:17,100 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2021-12-14 17:04:17,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 17:04:17,100 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-14 17:04:17,100 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-14 17:04:17,101 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 17:04:17,101 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-14 17:04:17,101 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-14 17:04:17,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-14 17:04:17,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 17:04:17,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-14 17:04:17,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 17:04:17,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 17:04:17,103 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-14 17:04:17,103 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-14 17:04:17,103 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-12-14 17:04:17,103 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-12-14 17:04:17,103 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-14 17:04:17,103 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-14 17:04:17,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 17:04:17,103 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-14 17:04:17,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-14 17:04:17,104 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~~uint8_t~0~TO~int [2021-12-14 17:04:17,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~~uint8_t~0~TO~int [2021-12-14 17:04:17,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 17:04:17,105 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_right_trim_pred [2021-12-14 17:04:17,105 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_right_trim_pred [2021-12-14 17:04:17,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 17:04:17,267 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 17:04:17,268 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 17:04:17,901 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 17:04:17,907 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 17:04:17,907 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-14 17:04:17,909 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:04:17 BoogieIcfgContainer [2021-12-14 17:04:17,909 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 17:04:17,910 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 17:04:17,910 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 17:04:17,913 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 17:04:17,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 05:04:14" (1/3) ... [2021-12-14 17:04:17,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28d8349a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:04:17, skipping insertion in model container [2021-12-14 17:04:17,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:04:16" (2/3) ... [2021-12-14 17:04:17,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28d8349a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:04:17, skipping insertion in model container [2021-12-14 17:04:17,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:04:17" (3/3) ... [2021-12-14 17:04:17,916 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_cursor_right_trim_pred_harness.i [2021-12-14 17:04:17,920 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 17:04:17,920 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 17:04:17,954 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 17:04:17,959 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 17:04:17,959 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 17:04:17,971 INFO L276 IsEmpty]: Start isEmpty. Operand has 95 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 64 states have internal predecessors, (78), 22 states have call successors, (22), 8 states have call predecessors, (22), 8 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-14 17:04:17,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-14 17:04:17,976 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:04:17,976 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 17:04:17,977 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:04:17,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:04:17,983 INFO L85 PathProgramCache]: Analyzing trace with hash 990555707, now seen corresponding path program 1 times [2021-12-14 17:04:17,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:04:17,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100269281] [2021-12-14 17:04:17,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:17,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:04:18,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:18,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:04:18,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:18,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:18,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:18,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:04:18,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:18,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-14 17:04:18,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:18,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:04:18,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:18,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:04:18,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:18,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-14 17:04:18,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:18,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 17:04:18,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:18,480 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 17:04:18,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:04:18,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100269281] [2021-12-14 17:04:18,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100269281] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:04:18,481 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:04:18,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 17:04:18,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371091903] [2021-12-14 17:04:18,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:04:18,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-14 17:04:18,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:04:18,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-14 17:04:18,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 17:04:18,508 INFO L87 Difference]: Start difference. First operand has 95 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 64 states have internal predecessors, (78), 22 states have call successors, (22), 8 states have call predecessors, (22), 8 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 17:04:18,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:04:18,529 INFO L93 Difference]: Finished difference Result 186 states and 253 transitions. [2021-12-14 17:04:18,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-14 17:04:18,531 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 17:04:18,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:04:18,536 INFO L225 Difference]: With dead ends: 186 [2021-12-14 17:04:18,537 INFO L226 Difference]: Without dead ends: 86 [2021-12-14 17:04:18,539 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 17:04:18,542 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:04:18,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:04:18,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-14 17:04:18,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-12-14 17:04:18,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 57 states have internal predecessors, (66), 22 states have call successors, (22), 8 states have call predecessors, (22), 7 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-14 17:04:18,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 108 transitions. [2021-12-14 17:04:18,573 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 108 transitions. Word has length 61 [2021-12-14 17:04:18,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:04:18,573 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 108 transitions. [2021-12-14 17:04:18,573 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 17:04:18,574 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 108 transitions. [2021-12-14 17:04:18,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-14 17:04:18,591 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:04:18,591 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 17:04:18,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 17:04:18,592 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:04:18,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:04:18,592 INFO L85 PathProgramCache]: Analyzing trace with hash -89389740, now seen corresponding path program 1 times [2021-12-14 17:04:18,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:04:18,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558632976] [2021-12-14 17:04:18,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:18,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:04:18,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:18,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:04:18,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:18,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:18,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:18,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:04:18,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:18,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-14 17:04:18,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:18,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:04:18,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:18,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:04:18,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:18,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-14 17:04:18,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:18,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 17:04:18,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:18,882 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 17:04:18,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:04:18,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558632976] [2021-12-14 17:04:18,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558632976] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:04:18,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949004477] [2021-12-14 17:04:18,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:18,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:04:18,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:04:18,884 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 17:04:18,885 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 17:04:19,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:19,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 2488 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 17:04:19,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:04:19,451 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 17:04:19,451 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:04:19,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949004477] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:04:19,451 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:04:19,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2021-12-14 17:04:19,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653115889] [2021-12-14 17:04:19,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:04:19,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 17:04:19,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:04:19,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 17:04:19,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-14 17:04:19,454 INFO L87 Difference]: Start difference. First operand 86 states and 108 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 17:04:19,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:04:19,542 INFO L93 Difference]: Finished difference Result 155 states and 200 transitions. [2021-12-14 17:04:19,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 17:04:19,542 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 17:04:19,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:04:19,545 INFO L225 Difference]: With dead ends: 155 [2021-12-14 17:04:19,545 INFO L226 Difference]: Without dead ends: 89 [2021-12-14 17:04:19,546 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 17:04:19,546 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 124 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:04:19,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 231 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 17:04:19,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-14 17:04:19,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-12-14 17:04:19,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 60 states have internal predecessors, (68), 22 states have call successors, (22), 8 states have call predecessors, (22), 8 states have return successors, (24), 20 states have call predecessors, (24), 20 states have call successors, (24) [2021-12-14 17:04:19,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 114 transitions. [2021-12-14 17:04:19,556 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 114 transitions. Word has length 63 [2021-12-14 17:04:19,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:04:19,557 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 114 transitions. [2021-12-14 17:04:19,557 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 17:04:19,557 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 114 transitions. [2021-12-14 17:04:19,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 17:04:19,558 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:04:19,558 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 17:04:19,586 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 17:04:19,772 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 17:04:19,773 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:04:19,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:04:19,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1896344881, now seen corresponding path program 1 times [2021-12-14 17:04:19,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:04:19,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143409822] [2021-12-14 17:04:19,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:19,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:04:19,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:19,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:04:19,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:19,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:19,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:19,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:04:19,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:19,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:04:19,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:19,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-14 17:04:19,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:19,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 17:04:19,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:19,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-14 17:04:19,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:19,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-14 17:04:19,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:19,969 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 17:04:19,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:04:19,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143409822] [2021-12-14 17:04:19,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143409822] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:04:19,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884560567] [2021-12-14 17:04:19,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:19,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:04:19,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:04:19,971 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 17:04:19,972 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 17:04:20,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:20,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 2493 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 17:04:20,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:04:20,487 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 17:04:20,487 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:04:20,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884560567] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:04:20,488 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:04:20,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2021-12-14 17:04:20,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358580056] [2021-12-14 17:04:20,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:04:20,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 17:04:20,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:04:20,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 17:04:20,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-12-14 17:04:20,489 INFO L87 Difference]: Start difference. First operand 89 states and 114 transitions. Second operand has 8 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-14 17:04:20,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:04:20,626 INFO L93 Difference]: Finished difference Result 148 states and 189 transitions. [2021-12-14 17:04:20,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 17:04:20,627 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 65 [2021-12-14 17:04:20,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:04:20,631 INFO L225 Difference]: With dead ends: 148 [2021-12-14 17:04:20,631 INFO L226 Difference]: Without dead ends: 89 [2021-12-14 17:04:20,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-12-14 17:04:20,635 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 135 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:04:20,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 348 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 17:04:20,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-14 17:04:20,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-12-14 17:04:20,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 60 states have internal predecessors, (68), 22 states have call successors, (22), 8 states have call predecessors, (22), 8 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2021-12-14 17:04:20,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 112 transitions. [2021-12-14 17:04:20,653 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 112 transitions. Word has length 65 [2021-12-14 17:04:20,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:04:20,654 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 112 transitions. [2021-12-14 17:04:20,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-14 17:04:20,654 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 112 transitions. [2021-12-14 17:04:20,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-14 17:04:20,658 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:04:20,658 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 17:04:20,691 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 17:04:20,867 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 17:04:20,868 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:04:20,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:04:20,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1793788399, now seen corresponding path program 1 times [2021-12-14 17:04:20,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:04:20,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529823019] [2021-12-14 17:04:20,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:20,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:04:20,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:21,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:04:21,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:21,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:21,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:21,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:04:21,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:21,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:04:21,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:21,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-14 17:04:21,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:21,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 17:04:21,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:21,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 17:04:21,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:21,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-14 17:04:21,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:21,081 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 17:04:21,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:04:21,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529823019] [2021-12-14 17:04:21,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529823019] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:04:21,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:04:21,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 17:04:21,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781311449] [2021-12-14 17:04:21,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:04:21,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 17:04:21,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:04:21,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 17:04:21,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 17:04:21,083 INFO L87 Difference]: Start difference. First operand 89 states and 112 transitions. Second operand has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-12-14 17:04:21,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:04:21,126 INFO L93 Difference]: Finished difference Result 101 states and 129 transitions. [2021-12-14 17:04:21,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 17:04:21,127 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 17:04:21,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:04:21,128 INFO L225 Difference]: With dead ends: 101 [2021-12-14 17:04:21,128 INFO L226 Difference]: Without dead ends: 99 [2021-12-14 17:04:21,128 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 17:04:21,129 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 17:04:21,129 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 17:04:21,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-14 17:04:21,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2021-12-14 17:04:21,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 64 states have (on average 1.15625) internal successors, (74), 67 states have internal predecessors, (74), 23 states have call successors, (23), 9 states have call predecessors, (23), 10 states have return successors, (29), 21 states have call predecessors, (29), 21 states have call successors, (29) [2021-12-14 17:04:21,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 126 transitions. [2021-12-14 17:04:21,136 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 126 transitions. Word has length 69 [2021-12-14 17:04:21,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:04:21,136 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 126 transitions. [2021-12-14 17:04:21,136 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 17:04:21,136 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 126 transitions. [2021-12-14 17:04:21,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-14 17:04:21,137 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:04:21,137 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 17:04:21,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 17:04:21,137 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:04:21,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:04:21,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1240513463, now seen corresponding path program 1 times [2021-12-14 17:04:21,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:04:21,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762273056] [2021-12-14 17:04:21,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:21,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:04:21,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:21,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:04:21,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:21,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:21,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:21,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:04:21,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:21,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:04:21,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:21,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-14 17:04:21,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:21,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 17:04:21,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:21,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 17:04:21,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:21,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-14 17:04:21,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:21,507 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 17:04:21,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:04:21,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762273056] [2021-12-14 17:04:21,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762273056] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:04:21,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890277106] [2021-12-14 17:04:21,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:21,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:04:21,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:04:21,521 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 17:04:21,522 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 17:04:21,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:21,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 2515 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-14 17:04:21,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:04:22,672 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 17:04:22,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:04:22,952 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 17:04:22,988 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-12-14 17:04:22,988 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 17:04:23,010 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 17:04:23,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890277106] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 17:04:23,011 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 17:04:23,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 11] total 23 [2021-12-14 17:04:23,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104696488] [2021-12-14 17:04:23,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 17:04:23,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-14 17:04:23,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:04:23,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-14 17:04:23,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-12-14 17:04:23,013 INFO L87 Difference]: Start difference. First operand 98 states and 126 transitions. Second operand has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 21 states have internal predecessors, (87), 7 states have call successors, (19), 5 states have call predecessors, (19), 5 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2021-12-14 17:04:23,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:04:23,761 INFO L93 Difference]: Finished difference Result 233 states and 314 transitions. [2021-12-14 17:04:23,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-14 17:04:23,761 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 21 states have internal predecessors, (87), 7 states have call successors, (19), 5 states have call predecessors, (19), 5 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) Word has length 73 [2021-12-14 17:04:23,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:04:23,763 INFO L225 Difference]: With dead ends: 233 [2021-12-14 17:04:23,764 INFO L226 Difference]: Without dead ends: 152 [2021-12-14 17:04:23,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 140 SyntacticMatches, 13 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2021-12-14 17:04:23,765 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 121 mSDsluCounter, 693 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 798 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 17:04:23,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 798 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 621 Invalid, 0 Unknown, 166 Unchecked, 0.5s Time] [2021-12-14 17:04:23,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-12-14 17:04:23,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 137. [2021-12-14 17:04:23,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 91 states have (on average 1.1538461538461537) internal successors, (105), 93 states have internal predecessors, (105), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (39), 30 states have call predecessors, (39), 31 states have call successors, (39) [2021-12-14 17:04:23,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 177 transitions. [2021-12-14 17:04:23,793 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 177 transitions. Word has length 73 [2021-12-14 17:04:23,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:04:23,793 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 177 transitions. [2021-12-14 17:04:23,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 21 states have internal predecessors, (87), 7 states have call successors, (19), 5 states have call predecessors, (19), 5 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2021-12-14 17:04:23,794 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 177 transitions. [2021-12-14 17:04:23,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-14 17:04:23,797 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:04:23,797 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 17:04:23,816 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 17:04:23,998 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 17:04:23,998 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:04:23,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:04:23,999 INFO L85 PathProgramCache]: Analyzing trace with hash 295115559, now seen corresponding path program 1 times [2021-12-14 17:04:23,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:04:23,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652789497] [2021-12-14 17:04:23,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:24,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:04:24,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:24,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:04:24,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:24,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:24,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:24,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:04:24,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:24,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:04:24,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:24,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-14 17:04:24,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:24,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 17:04:24,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:24,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 17:04:24,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:24,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 17:04:24,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:24,182 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 17:04:24,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:04:24,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652789497] [2021-12-14 17:04:24,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652789497] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:04:24,182 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:04:24,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 17:04:24,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208594097] [2021-12-14 17:04:24,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:04:24,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 17:04:24,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:04:24,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 17:04:24,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 17:04:24,184 INFO L87 Difference]: Start difference. First operand 137 states and 177 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 17:04:24,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:04:24,199 INFO L93 Difference]: Finished difference Result 199 states and 259 transitions. [2021-12-14 17:04:24,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 17:04:24,200 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 17:04:24,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:04:24,204 INFO L225 Difference]: With dead ends: 199 [2021-12-14 17:04:24,204 INFO L226 Difference]: Without dead ends: 139 [2021-12-14 17:04:24,205 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 17:04:24,206 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 0 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:04:24,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 209 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:04:24,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-12-14 17:04:24,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-12-14 17:04:24,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 93 states have (on average 1.1397849462365592) internal successors, (106), 95 states have internal predecessors, (106), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (39), 30 states have call predecessors, (39), 31 states have call successors, (39) [2021-12-14 17:04:24,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 178 transitions. [2021-12-14 17:04:24,220 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 178 transitions. Word has length 76 [2021-12-14 17:04:24,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:04:24,220 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 178 transitions. [2021-12-14 17:04:24,221 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 17:04:24,221 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 178 transitions. [2021-12-14 17:04:24,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-14 17:04:24,224 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:04:24,224 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 17:04:24,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 17:04:24,224 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:04:24,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:04:24,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1625051706, now seen corresponding path program 1 times [2021-12-14 17:04:24,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:04:24,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086076080] [2021-12-14 17:04:24,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:24,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:04:24,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:24,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:04:24,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:24,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:24,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:24,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:04:24,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:24,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:04:24,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:24,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-14 17:04:24,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:24,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 17:04:24,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:24,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 17:04:24,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:24,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-14 17:04:24,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:24,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 17:04:24,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:24,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-14 17:04:24,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:24,413 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 17:04:24,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:04:24,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086076080] [2021-12-14 17:04:24,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086076080] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:04:24,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:04:24,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 17:04:24,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713612504] [2021-12-14 17:04:24,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:04:24,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 17:04:24,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:04:24,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 17:04:24,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:04:24,416 INFO L87 Difference]: Start difference. First operand 139 states and 178 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-14 17:04:24,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:04:24,442 INFO L93 Difference]: Finished difference Result 181 states and 230 transitions. [2021-12-14 17:04:24,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:04:24,443 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 17:04:24,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:04:24,445 INFO L225 Difference]: With dead ends: 181 [2021-12-14 17:04:24,445 INFO L226 Difference]: Without dead ends: 139 [2021-12-14 17:04:24,445 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 17:04:24,446 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 18 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:04:24,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 284 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:04:24,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-12-14 17:04:24,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-12-14 17:04:24,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 93 states have (on average 1.1397849462365592) internal successors, (106), 95 states have internal predecessors, (106), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (38), 30 states have call predecessors, (38), 31 states have call successors, (38) [2021-12-14 17:04:24,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 177 transitions. [2021-12-14 17:04:24,459 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 177 transitions. Word has length 81 [2021-12-14 17:04:24,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:04:24,460 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 177 transitions. [2021-12-14 17:04:24,460 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 17:04:24,460 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 177 transitions. [2021-12-14 17:04:24,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-14 17:04:24,462 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:04:24,462 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 17:04:24,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 17:04:24,463 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:04:24,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:04:24,463 INFO L85 PathProgramCache]: Analyzing trace with hash -2069482329, now seen corresponding path program 1 times [2021-12-14 17:04:24,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:04:24,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494312000] [2021-12-14 17:04:24,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:24,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:04:24,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:24,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:04:24,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:24,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:24,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:24,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:04:24,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:24,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-14 17:04:24,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:24,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:04:24,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:24,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-14 17:04:24,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:24,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-14 17:04:24,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:24,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 17:04:24,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:24,683 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 17:04:24,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:04:24,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494312000] [2021-12-14 17:04:24,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494312000] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:04:24,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079463242] [2021-12-14 17:04:24,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:24,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:04:24,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:04:24,686 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 17:04:24,715 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 17:04:25,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:25,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 2539 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-14 17:04:25,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:04:25,157 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 17:04:25,157 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:04:25,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079463242] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:04:25,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:04:25,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 10 [2021-12-14 17:04:25,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072321174] [2021-12-14 17:04:25,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:04:25,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 17:04:25,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:04:25,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 17:04:25,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-14 17:04:25,160 INFO L87 Difference]: Start difference. First operand 139 states and 177 transitions. Second operand has 9 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-14 17:04:25,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:04:25,236 INFO L93 Difference]: Finished difference Result 237 states and 308 transitions. [2021-12-14 17:04:25,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 17:04:25,237 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 17:04:25,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:04:25,238 INFO L225 Difference]: With dead ends: 237 [2021-12-14 17:04:25,238 INFO L226 Difference]: Without dead ends: 144 [2021-12-14 17:04:25,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-12-14 17:04:25,240 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 12 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:04:25,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 799 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 17:04:25,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-12-14 17:04:25,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2021-12-14 17:04:25,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 97 states have (on average 1.134020618556701) internal successors, (110), 100 states have internal predecessors, (110), 33 states have call successors, (33), 13 states have call predecessors, (33), 13 states have return successors, (43), 30 states have call predecessors, (43), 31 states have call successors, (43) [2021-12-14 17:04:25,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 186 transitions. [2021-12-14 17:04:25,249 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 186 transitions. Word has length 81 [2021-12-14 17:04:25,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:04:25,250 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 186 transitions. [2021-12-14 17:04:25,250 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 17:04:25,250 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 186 transitions. [2021-12-14 17:04:25,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-14 17:04:25,251 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:04:25,251 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 17:04:25,272 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 17:04:25,471 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 17:04:25,471 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:04:25,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:04:25,472 INFO L85 PathProgramCache]: Analyzing trace with hash -442406659, now seen corresponding path program 1 times [2021-12-14 17:04:25,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:04:25,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254113065] [2021-12-14 17:04:25,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:25,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:04:25,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:25,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:04:25,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:25,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:25,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:25,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:04:25,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:25,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:04:25,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:25,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-14 17:04:25,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:25,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 17:04:25,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:25,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 17:04:25,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:25,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-14 17:04:25,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:25,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-14 17:04:25,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:25,737 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 17:04:25,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:04:25,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254113065] [2021-12-14 17:04:25,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254113065] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:04:25,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139552283] [2021-12-14 17:04:25,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:25,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:04:25,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:04:25,739 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 17:04:25,755 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 17:04:26,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:26,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 2566 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-14 17:04:26,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:04:26,158 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 17:04:26,622 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-14 17:04:26,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 31 [2021-12-14 17:04:26,665 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 17:04:26,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:04:26,882 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 17:04:26,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139552283] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 17:04:26,883 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 17:04:26,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 10] total 20 [2021-12-14 17:04:26,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663221466] [2021-12-14 17:04:26,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 17:04:26,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-14 17:04:26,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:04:26,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-14 17:04:26,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-12-14 17:04:26,884 INFO L87 Difference]: Start difference. First operand 144 states and 186 transitions. Second operand has 20 states, 20 states have (on average 4.45) internal successors, (89), 18 states have internal predecessors, (89), 8 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2021-12-14 17:04:27,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:04:27,588 INFO L93 Difference]: Finished difference Result 250 states and 337 transitions. [2021-12-14 17:04:27,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-14 17:04:27,589 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.45) internal successors, (89), 18 states have internal predecessors, (89), 8 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) Word has length 82 [2021-12-14 17:04:27,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:04:27,590 INFO L225 Difference]: With dead ends: 250 [2021-12-14 17:04:27,590 INFO L226 Difference]: Without dead ends: 177 [2021-12-14 17:04:27,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 163 SyntacticMatches, 11 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2021-12-14 17:04:27,591 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 102 mSDsluCounter, 1063 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 1173 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 17:04:27,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 1173 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 715 Invalid, 0 Unknown, 166 Unchecked, 0.5s Time] [2021-12-14 17:04:27,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-12-14 17:04:27,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 154. [2021-12-14 17:04:27,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 104 states have (on average 1.0961538461538463) internal successors, (114), 107 states have internal predecessors, (114), 34 states have call successors, (34), 14 states have call predecessors, (34), 15 states have return successors, (47), 32 states have call predecessors, (47), 32 states have call successors, (47) [2021-12-14 17:04:27,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 195 transitions. [2021-12-14 17:04:27,599 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 195 transitions. Word has length 82 [2021-12-14 17:04:27,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:04:27,600 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 195 transitions. [2021-12-14 17:04:27,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.45) internal successors, (89), 18 states have internal predecessors, (89), 8 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2021-12-14 17:04:27,600 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 195 transitions. [2021-12-14 17:04:27,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-14 17:04:27,601 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:04:27,601 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:04:27,623 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-14 17:04:27,815 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 17:04:27,815 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:04:27,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:04:27,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1702906197, now seen corresponding path program 1 times [2021-12-14 17:04:27,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:04:27,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346891106] [2021-12-14 17:04:27,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:27,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:04:27,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:27,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:04:27,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:27,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:27,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:27,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:04:27,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:27,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:04:27,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:27,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-14 17:04:27,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:27,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 17:04:27,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:27,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 17:04:27,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:27,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-14 17:04:27,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:27,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 17:04:27,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:28,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-14 17:04:28,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:28,033 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 17:04:28,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:04:28,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346891106] [2021-12-14 17:04:28,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346891106] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:04:28,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:04:28,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 17:04:28,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216328500] [2021-12-14 17:04:28,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:04:28,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 17:04:28,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:04:28,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 17:04:28,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 17:04:28,035 INFO L87 Difference]: Start difference. First operand 154 states and 195 transitions. Second operand has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-14 17:04:28,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:04:28,076 INFO L93 Difference]: Finished difference Result 164 states and 206 transitions. [2021-12-14 17:04:28,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 17:04:28,076 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 83 [2021-12-14 17:04:28,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:04:28,077 INFO L225 Difference]: With dead ends: 164 [2021-12-14 17:04:28,077 INFO L226 Difference]: Without dead ends: 162 [2021-12-14 17:04:28,078 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 17:04:28,078 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 16 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:04:28,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 736 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:04:28,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-12-14 17:04:28,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2021-12-14 17:04:28,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 107 states have (on average 1.0934579439252337) internal successors, (117), 110 states have internal predecessors, (117), 36 states have call successors, (36), 15 states have call predecessors, (36), 16 states have return successors, (49), 34 states have call predecessors, (49), 34 states have call successors, (49) [2021-12-14 17:04:28,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 202 transitions. [2021-12-14 17:04:28,092 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 202 transitions. Word has length 83 [2021-12-14 17:04:28,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:04:28,092 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 202 transitions. [2021-12-14 17:04:28,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-14 17:04:28,092 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 202 transitions. [2021-12-14 17:04:28,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-14 17:04:28,093 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:04:28,093 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 17:04:28,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 17:04:28,094 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:04:28,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:04:28,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1271029248, now seen corresponding path program 1 times [2021-12-14 17:04:28,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:04:28,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330596191] [2021-12-14 17:04:28,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:28,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:04:28,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:28,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:04:28,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:28,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:28,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:28,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:04:28,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:28,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 17:04:28,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:28,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 17:04:28,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:28,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-14 17:04:28,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:28,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-14 17:04:28,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:28,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 17:04:28,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:28,284 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 17:04:28,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:04:28,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330596191] [2021-12-14 17:04:28,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330596191] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:04:28,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255654097] [2021-12-14 17:04:28,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:28,285 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:04:28,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:04:28,286 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 17:04:28,288 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 17:04:28,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:28,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 2549 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-14 17:04:28,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:04:28,792 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 17:04:28,792 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:04:28,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255654097] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:04:28,792 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:04:28,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 10 [2021-12-14 17:04:28,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890882718] [2021-12-14 17:04:28,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:04:28,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 17:04:28,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:04:28,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 17:04:28,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-14 17:04:28,795 INFO L87 Difference]: Start difference. First operand 160 states and 202 transitions. Second operand has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-14 17:04:28,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:04:28,874 INFO L93 Difference]: Finished difference Result 246 states and 313 transitions. [2021-12-14 17:04:28,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 17:04:28,875 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 17:04:28,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:04:28,876 INFO L225 Difference]: With dead ends: 246 [2021-12-14 17:04:28,876 INFO L226 Difference]: Without dead ends: 160 [2021-12-14 17:04:28,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-12-14 17:04:28,877 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 12 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:04:28,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 792 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 17:04:28,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-12-14 17:04:28,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2021-12-14 17:04:28,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 107 states have (on average 1.0934579439252337) internal successors, (117), 110 states have internal predecessors, (117), 36 states have call successors, (36), 15 states have call predecessors, (36), 16 states have return successors, (48), 34 states have call predecessors, (48), 34 states have call successors, (48) [2021-12-14 17:04:28,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 201 transitions. [2021-12-14 17:04:28,884 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 201 transitions. Word has length 83 [2021-12-14 17:04:28,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:04:28,885 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 201 transitions. [2021-12-14 17:04:28,885 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 17:04:28,885 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 201 transitions. [2021-12-14 17:04:28,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-14 17:04:28,886 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:04:28,886 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 17:04:28,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-14 17:04:29,103 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 17:04:29,103 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:04:29,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:04:29,104 INFO L85 PathProgramCache]: Analyzing trace with hash 558656115, now seen corresponding path program 1 times [2021-12-14 17:04:29,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:04:29,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055369082] [2021-12-14 17:04:29,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:29,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:04:29,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:29,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:04:29,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:29,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:29,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:29,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:04:29,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:29,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:04:29,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:29,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-14 17:04:29,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:29,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 17:04:29,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:29,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 17:04:29,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:29,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-14 17:04:29,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:29,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 17:04:29,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:29,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-14 17:04:29,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:29,456 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 17:04:29,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:04:29,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055369082] [2021-12-14 17:04:29,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055369082] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:04:29,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606187359] [2021-12-14 17:04:29,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:29,457 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:04:29,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:04:29,458 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 17:04:29,459 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 17:04:29,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:29,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 2547 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-14 17:04:29,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:04:29,915 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 17:04:30,788 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 17:04:30,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:04:30,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606187359] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:04:30,989 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 17:04:30,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 24 [2021-12-14 17:04:30,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176064636] [2021-12-14 17:04:30,989 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 17:04:30,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-14 17:04:30,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:04:30,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-14 17:04:30,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-12-14 17:04:30,990 INFO L87 Difference]: Start difference. First operand 160 states and 201 transitions. Second operand has 24 states, 24 states have (on average 3.7083333333333335) internal successors, (89), 22 states have internal predecessors, (89), 10 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (20), 10 states have call predecessors, (20), 9 states have call successors, (20) [2021-12-14 17:04:32,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:04:32,092 INFO L93 Difference]: Finished difference Result 270 states and 352 transitions. [2021-12-14 17:04:32,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-14 17:04:32,093 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.7083333333333335) internal successors, (89), 22 states have internal predecessors, (89), 10 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (20), 10 states have call predecessors, (20), 9 states have call successors, (20) Word has length 87 [2021-12-14 17:04:32,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:04:32,094 INFO L225 Difference]: With dead ends: 270 [2021-12-14 17:04:32,094 INFO L226 Difference]: Without dead ends: 209 [2021-12-14 17:04:32,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 117 SyntacticMatches, 15 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=235, Invalid=1487, Unknown=0, NotChecked=0, Total=1722 [2021-12-14 17:04:32,095 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 138 mSDsluCounter, 1255 mSDsCounter, 0 mSdLazyCounter, 1024 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 1388 SdHoareTripleChecker+Invalid, 1495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 426 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 17:04:32,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 1388 Invalid, 1495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1024 Invalid, 0 Unknown, 426 Unchecked, 0.7s Time] [2021-12-14 17:04:32,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-12-14 17:04:32,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 174. [2021-12-14 17:04:32,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 117 states have (on average 1.0854700854700854) internal successors, (127), 120 states have internal predecessors, (127), 38 states have call successors, (38), 17 states have call predecessors, (38), 18 states have return successors, (47), 36 states have call predecessors, (47), 36 states have call successors, (47) [2021-12-14 17:04:32,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 212 transitions. [2021-12-14 17:04:32,103 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 212 transitions. Word has length 87 [2021-12-14 17:04:32,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:04:32,103 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 212 transitions. [2021-12-14 17:04:32,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.7083333333333335) internal successors, (89), 22 states have internal predecessors, (89), 10 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (20), 10 states have call predecessors, (20), 9 states have call successors, (20) [2021-12-14 17:04:32,104 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 212 transitions. [2021-12-14 17:04:32,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-14 17:04:32,104 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:04:32,105 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 17:04:32,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-14 17:04:32,325 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 17:04:32,326 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:04:32,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:04:32,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1900291175, now seen corresponding path program 2 times [2021-12-14 17:04:32,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:04:32,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956741382] [2021-12-14 17:04:32,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:32,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:04:32,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:32,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:04:32,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:32,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:32,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:32,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:04:32,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:32,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 17:04:32,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:32,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 17:04:32,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:32,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 17:04:32,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:32,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 17:04:32,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:32,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 17:04:32,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:32,603 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 17:04:32,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:04:32,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956741382] [2021-12-14 17:04:32,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956741382] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:04:32,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087277204] [2021-12-14 17:04:32,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 17:04:32,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:04:32,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:04:32,605 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 17:04:32,607 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 17:04:32,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-14 17:04:32,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 17:04:32,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 2326 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-14 17:04:32,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:04:33,329 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 17:04:33,329 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:04:33,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087277204] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:04:33,330 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:04:33,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 17 [2021-12-14 17:04:33,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428377288] [2021-12-14 17:04:33,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:04:33,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 17:04:33,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:04:33,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 17:04:33,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-12-14 17:04:33,331 INFO L87 Difference]: Start difference. First operand 174 states and 212 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 17:04:33,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:04:33,421 INFO L93 Difference]: Finished difference Result 254 states and 311 transitions. [2021-12-14 17:04:33,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 17:04:33,421 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 17:04:33,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:04:33,422 INFO L225 Difference]: With dead ends: 254 [2021-12-14 17:04:33,422 INFO L226 Difference]: Without dead ends: 191 [2021-12-14 17:04:33,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-12-14 17:04:33,423 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 21 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:04:33,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 601 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 121 Unchecked, 0.0s Time] [2021-12-14 17:04:33,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-12-14 17:04:33,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2021-12-14 17:04:33,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 132 states have (on average 1.0984848484848484) internal successors, (145), 135 states have internal predecessors, (145), 39 states have call successors, (39), 19 states have call predecessors, (39), 19 states have return successors, (49), 36 states have call predecessors, (49), 37 states have call successors, (49) [2021-12-14 17:04:33,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 233 transitions. [2021-12-14 17:04:33,431 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 233 transitions. Word has length 85 [2021-12-14 17:04:33,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:04:33,432 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 233 transitions. [2021-12-14 17:04:33,432 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 17:04:33,432 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 233 transitions. [2021-12-14 17:04:33,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-14 17:04:33,433 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:04:33,433 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 17:04:33,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-14 17:04:33,652 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 17:04:33,653 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:04:33,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:04:33,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1432579808, now seen corresponding path program 1 times [2021-12-14 17:04:33,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:04:33,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230525804] [2021-12-14 17:04:33,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:33,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:04:33,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:33,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:04:33,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:33,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:33,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:33,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:04:33,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:33,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 17:04:33,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:33,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 17:04:33,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:33,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 17:04:33,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:33,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 17:04:33,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:33,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 17:04:33,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:33,919 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 17:04:33,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:04:33,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230525804] [2021-12-14 17:04:33,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230525804] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:04:33,920 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:04:33,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-14 17:04:33,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21307284] [2021-12-14 17:04:33,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:04:33,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-14 17:04:33,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:04:33,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-14 17:04:33,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-12-14 17:04:33,922 INFO L87 Difference]: Start difference. First operand 191 states and 233 transitions. Second operand has 13 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-12-14 17:04:34,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:04:34,164 INFO L93 Difference]: Finished difference Result 199 states and 241 transitions. [2021-12-14 17:04:34,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 17:04:34,165 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 17:04:34,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:04:34,166 INFO L225 Difference]: With dead ends: 199 [2021-12-14 17:04:34,166 INFO L226 Difference]: Without dead ends: 197 [2021-12-14 17:04:34,166 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 17:04:34,167 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 38 mSDsluCounter, 1014 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:04:34,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 1124 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 17:04:34,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-12-14 17:04:34,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2021-12-14 17:04:34,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 135 states have (on average 1.0962962962962963) internal successors, (148), 138 states have internal predecessors, (148), 40 states have call successors, (40), 20 states have call predecessors, (40), 20 states have return successors, (50), 37 states have call predecessors, (50), 38 states have call successors, (50) [2021-12-14 17:04:34,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 238 transitions. [2021-12-14 17:04:34,173 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 238 transitions. Word has length 87 [2021-12-14 17:04:34,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:04:34,174 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 238 transitions. [2021-12-14 17:04:34,174 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 17:04:34,174 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 238 transitions. [2021-12-14 17:04:34,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-14 17:04:34,186 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:04:34,186 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 17:04:34,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 17:04:34,186 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:04:34,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:04:34,187 INFO L85 PathProgramCache]: Analyzing trace with hash 904354819, now seen corresponding path program 1 times [2021-12-14 17:04:34,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:04:34,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653292062] [2021-12-14 17:04:34,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:34,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:04:34,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:34,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:04:34,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:34,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:34,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:34,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:04:34,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:34,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 17:04:34,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:34,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 17:04:34,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:34,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 17:04:34,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:34,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 17:04:34,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:34,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-14 17:04:34,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:34,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-14 17:04:34,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:34,651 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 17:04:34,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:04:34,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653292062] [2021-12-14 17:04:34,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653292062] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:04:34,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469802507] [2021-12-14 17:04:34,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:34,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:04:34,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:04:34,653 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 17:04:34,654 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 17:04:35,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:35,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 2589 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-14 17:04:35,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:04:37,797 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 17:04:37,800 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 17:04:37,802 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 17:04:37,888 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 17:04:37,888 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:04:37,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469802507] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:04:37,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:04:37,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [11] total 23 [2021-12-14 17:04:37,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233251131] [2021-12-14 17:04:37,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:04:37,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 17:04:37,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:04:37,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 17:04:37,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=416, Unknown=1, NotChecked=0, Total=506 [2021-12-14 17:04:37,890 INFO L87 Difference]: Start difference. First operand 196 states and 238 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 12 states have internal predecessors, (59), 3 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-14 17:04:38,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:04:38,874 INFO L93 Difference]: Finished difference Result 364 states and 473 transitions. [2021-12-14 17:04:38,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-14 17:04:38,875 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 17:04:38,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:04:38,876 INFO L225 Difference]: With dead ends: 364 [2021-12-14 17:04:38,876 INFO L226 Difference]: Without dead ends: 245 [2021-12-14 17:04:38,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=196, Invalid=795, Unknown=1, NotChecked=0, Total=992 [2021-12-14 17:04:38,877 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 192 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 17:04:38,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 494 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 806 Invalid, 0 Unknown, 123 Unchecked, 0.6s Time] [2021-12-14 17:04:38,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-12-14 17:04:38,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 214. [2021-12-14 17:04:38,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 150 states have (on average 1.1) internal successors, (165), 153 states have internal predecessors, (165), 41 states have call successors, (41), 21 states have call predecessors, (41), 22 states have return successors, (58), 39 states have call predecessors, (58), 39 states have call successors, (58) [2021-12-14 17:04:38,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 264 transitions. [2021-12-14 17:04:38,886 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 264 transitions. Word has length 91 [2021-12-14 17:04:38,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:04:38,886 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 264 transitions. [2021-12-14 17:04:38,886 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 17:04:38,887 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 264 transitions. [2021-12-14 17:04:38,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-14 17:04:38,888 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:04:38,888 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 17:04:38,910 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 17:04:39,104 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 17:04:39,104 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:04:39,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:04:39,104 INFO L85 PathProgramCache]: Analyzing trace with hash -62995835, now seen corresponding path program 1 times [2021-12-14 17:04:39,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:04:39,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882963472] [2021-12-14 17:04:39,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:39,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:04:39,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:39,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:04:39,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:39,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:39,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:39,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:04:39,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:39,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 17:04:39,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:39,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 17:04:39,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:39,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 17:04:39,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:39,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 17:04:39,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:39,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-14 17:04:39,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:39,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-14 17:04:39,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:39,236 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 17:04:39,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:04:39,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882963472] [2021-12-14 17:04:39,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882963472] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:04:39,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345698526] [2021-12-14 17:04:39,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:39,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:04:39,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:04:39,238 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 17:04:39,264 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 17:04:39,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:39,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 2584 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 17:04:39,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:04:39,738 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 17:04:39,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:04:39,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345698526] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:04:39,739 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:04:39,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-12-14 17:04:39,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260257967] [2021-12-14 17:04:39,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:04:39,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:04:39,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:04:39,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:04:39,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 17:04:39,741 INFO L87 Difference]: Start difference. First operand 214 states and 264 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-14 17:04:39,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:04:39,763 INFO L93 Difference]: Finished difference Result 343 states and 433 transitions. [2021-12-14 17:04:39,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:04:39,763 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 17:04:39,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:04:39,764 INFO L225 Difference]: With dead ends: 343 [2021-12-14 17:04:39,765 INFO L226 Difference]: Without dead ends: 205 [2021-12-14 17:04:39,765 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 17:04:39,766 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 6 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:04:39,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 316 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:04:39,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-12-14 17:04:39,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 202. [2021-12-14 17:04:39,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 140 states have (on average 1.0785714285714285) internal successors, (151), 143 states have internal predecessors, (151), 40 states have call successors, (40), 21 states have call predecessors, (40), 21 states have return successors, (50), 37 states have call predecessors, (50), 38 states have call successors, (50) [2021-12-14 17:04:39,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 241 transitions. [2021-12-14 17:04:39,775 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 241 transitions. Word has length 91 [2021-12-14 17:04:39,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:04:39,776 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 241 transitions. [2021-12-14 17:04:39,776 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 17:04:39,776 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 241 transitions. [2021-12-14 17:04:39,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-14 17:04:39,777 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:04:39,777 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 17:04:39,798 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 17:04:39,998 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 17:04:39,998 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:04:39,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:04:39,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1386307521, now seen corresponding path program 1 times [2021-12-14 17:04:39,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:04:39,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418178372] [2021-12-14 17:04:39,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:39,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:04:40,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:40,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:04:40,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:40,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:40,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:40,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:04:40,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:40,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:04:40,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:40,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:04:40,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:40,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:04:40,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:40,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:40,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:40,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:04:40,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:40,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:04:40,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:40,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:04:40,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:40,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:04:40,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:40,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-14 17:04:40,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:40,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-14 17:04:40,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:40,207 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 17:04:40,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:04:40,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418178372] [2021-12-14 17:04:40,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418178372] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:04:40,207 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:04:40,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 17:04:40,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974082819] [2021-12-14 17:04:40,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:04:40,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 17:04:40,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:04:40,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 17:04:40,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-14 17:04:40,209 INFO L87 Difference]: Start difference. First operand 202 states and 241 transitions. Second operand has 9 states, 8 states have (on average 5.125) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-12-14 17:04:40,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:04:40,481 INFO L93 Difference]: Finished difference Result 210 states and 249 transitions. [2021-12-14 17:04:40,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 17:04:40,483 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 17:04:40,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:04:40,484 INFO L225 Difference]: With dead ends: 210 [2021-12-14 17:04:40,484 INFO L226 Difference]: Without dead ends: 208 [2021-12-14 17:04:40,485 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 17:04:40,485 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 51 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 17:04:40,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 526 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 17:04:40,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-12-14 17:04:40,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2021-12-14 17:04:40,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 143 states have (on average 1.0769230769230769) internal successors, (154), 146 states have internal predecessors, (154), 41 states have call successors, (41), 22 states have call predecessors, (41), 22 states have return successors, (51), 38 states have call predecessors, (51), 39 states have call successors, (51) [2021-12-14 17:04:40,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 246 transitions. [2021-12-14 17:04:40,495 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 246 transitions. Word has length 100 [2021-12-14 17:04:40,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:04:40,496 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 246 transitions. [2021-12-14 17:04:40,496 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 17:04:40,496 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 246 transitions. [2021-12-14 17:04:40,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-14 17:04:40,497 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:04:40,497 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 17:04:40,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-14 17:04:40,498 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:04:40,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:04:40,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1718798494, now seen corresponding path program 1 times [2021-12-14 17:04:40,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:04:40,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048910937] [2021-12-14 17:04:40,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:40,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:04:40,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:40,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:04:40,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:40,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:40,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:40,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:04:40,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:40,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 17:04:40,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:40,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:04:40,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:40,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 17:04:40,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:40,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-14 17:04:40,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:40,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 17:04:40,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:40,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-14 17:04:40,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:40,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-14 17:04:40,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:40,920 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 17:04:40,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:04:40,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048910937] [2021-12-14 17:04:40,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048910937] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:04:40,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142416286] [2021-12-14 17:04:40,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:40,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:04:40,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:04:40,923 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 17:04:40,960 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 17:04:41,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:41,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 2634 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-14 17:04:41,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:04:41,347 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 17:04:41,351 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 17:04:41,494 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 17:04:41,496 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 17:04:41,572 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 17:04:41,572 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:04:41,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142416286] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:04:41,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:04:41,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 13 [2021-12-14 17:04:41,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289293331] [2021-12-14 17:04:41,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:04:41,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 17:04:41,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:04:41,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 17:04:41,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-12-14 17:04:41,574 INFO L87 Difference]: Start difference. First operand 207 states and 246 transitions. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 4 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-14 17:04:41,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:04:41,703 INFO L93 Difference]: Finished difference Result 392 states and 476 transitions. [2021-12-14 17:04:41,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 17:04:41,704 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 17:04:41,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:04:41,705 INFO L225 Difference]: With dead ends: 392 [2021-12-14 17:04:41,705 INFO L226 Difference]: Without dead ends: 236 [2021-12-14 17:04:41,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 113 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-12-14 17:04:41,706 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 36 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:04:41,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 693 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 95 Invalid, 0 Unknown, 23 Unchecked, 0.1s Time] [2021-12-14 17:04:41,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-12-14 17:04:41,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 222. [2021-12-14 17:04:41,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 154 states have (on average 1.0714285714285714) internal successors, (165), 158 states have internal predecessors, (165), 43 states have call successors, (43), 24 states have call predecessors, (43), 24 states have return successors, (53), 39 states have call predecessors, (53), 41 states have call successors, (53) [2021-12-14 17:04:41,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 261 transitions. [2021-12-14 17:04:41,717 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 261 transitions. Word has length 98 [2021-12-14 17:04:41,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:04:41,718 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 261 transitions. [2021-12-14 17:04:41,718 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 17:04:41,718 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 261 transitions. [2021-12-14 17:04:41,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-14 17:04:41,719 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:04:41,719 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 17:04:41,741 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 17:04:41,939 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 17:04:41,940 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:04:41,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:04:41,940 INFO L85 PathProgramCache]: Analyzing trace with hash 2111461513, now seen corresponding path program 1 times [2021-12-14 17:04:41,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:04:41,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165559056] [2021-12-14 17:04:41,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:41,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:04:41,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:42,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:04:42,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:42,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:42,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:42,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:04:42,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:42,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:04:42,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:42,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:04:42,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:42,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:04:42,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:42,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:42,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:42,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:04:42,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:42,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:04:42,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:42,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:04:42,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:42,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:04:42,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:42,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-14 17:04:42,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:42,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-14 17:04:42,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:42,364 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 17:04:42,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:04:42,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165559056] [2021-12-14 17:04:42,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165559056] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:04:42,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19617282] [2021-12-14 17:04:42,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:42,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:04:42,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:04:42,377 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 17:04:42,411 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 17:04:42,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:42,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 2600 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-14 17:04:42,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:04:43,212 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 17:04:43,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:04:43,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19617282] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:04:43,428 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 17:04:43,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-12-14 17:04:43,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309241485] [2021-12-14 17:04:43,428 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 17:04:43,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-14 17:04:43,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:04:43,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-14 17:04:43,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-12-14 17:04:43,430 INFO L87 Difference]: Start difference. First operand 222 states and 261 transitions. Second operand has 24 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 23 states have internal predecessors, (86), 9 states have call successors, (27), 5 states have call predecessors, (27), 7 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2021-12-14 17:04:44,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:04:44,577 INFO L93 Difference]: Finished difference Result 353 states and 455 transitions. [2021-12-14 17:04:44,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-14 17:04:44,578 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 23 states have internal predecessors, (86), 9 states have call successors, (27), 5 states have call predecessors, (27), 7 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 104 [2021-12-14 17:04:44,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:04:44,580 INFO L225 Difference]: With dead ends: 353 [2021-12-14 17:04:44,580 INFO L226 Difference]: Without dead ends: 284 [2021-12-14 17:04:44,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 142 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=278, Invalid=1792, Unknown=0, NotChecked=0, Total=2070 [2021-12-14 17:04:44,581 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 153 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 1690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 639 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 17:04:44,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 407 Invalid, 1690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 919 Invalid, 0 Unknown, 639 Unchecked, 0.7s Time] [2021-12-14 17:04:44,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-12-14 17:04:44,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 250. [2021-12-14 17:04:44,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 169 states have (on average 1.0769230769230769) internal successors, (182), 174 states have internal predecessors, (182), 54 states have call successors, (54), 25 states have call predecessors, (54), 26 states have return successors, (81), 50 states have call predecessors, (81), 52 states have call successors, (81) [2021-12-14 17:04:44,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 317 transitions. [2021-12-14 17:04:44,594 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 317 transitions. Word has length 104 [2021-12-14 17:04:44,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:04:44,595 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 317 transitions. [2021-12-14 17:04:44,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 23 states have internal predecessors, (86), 9 states have call successors, (27), 5 states have call predecessors, (27), 7 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2021-12-14 17:04:44,595 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 317 transitions. [2021-12-14 17:04:44,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-14 17:04:44,596 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:04:44,596 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:04:44,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-14 17:04:44,816 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 17:04:44,816 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:04:44,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:04:44,817 INFO L85 PathProgramCache]: Analyzing trace with hash -643190832, now seen corresponding path program 1 times [2021-12-14 17:04:44,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:04:44,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152223304] [2021-12-14 17:04:44,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:44,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:04:44,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:44,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:04:44,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:44,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:44,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:44,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:04:44,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:44,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:04:44,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:44,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:04:44,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:44,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:04:44,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:44,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:44,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:44,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:04:44,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:44,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:04:44,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:44,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:04:44,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:44,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:04:44,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:44,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-14 17:04:44,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:44,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-14 17:04:44,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:45,063 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 17:04:45,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:04:45,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152223304] [2021-12-14 17:04:45,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152223304] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:04:45,063 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:04:45,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-14 17:04:45,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465573674] [2021-12-14 17:04:45,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:04:45,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 17:04:45,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:04:45,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 17:04:45,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-12-14 17:04:45,065 INFO L87 Difference]: Start difference. First operand 250 states and 317 transitions. Second operand has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 11 states have internal predecessors, (47), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-12-14 17:04:45,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:04:45,644 INFO L93 Difference]: Finished difference Result 258 states and 325 transitions. [2021-12-14 17:04:45,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-14 17:04:45,644 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 11 states have internal predecessors, (47), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 106 [2021-12-14 17:04:45,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:04:45,646 INFO L225 Difference]: With dead ends: 258 [2021-12-14 17:04:45,646 INFO L226 Difference]: Without dead ends: 256 [2021-12-14 17:04:45,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2021-12-14 17:04:45,647 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 67 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 827 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 17:04:45,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 827 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 17:04:45,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-12-14 17:04:45,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 250. [2021-12-14 17:04:45,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 169 states have (on average 1.0769230769230769) internal successors, (182), 174 states have internal predecessors, (182), 54 states have call successors, (54), 25 states have call predecessors, (54), 26 states have return successors, (81), 50 states have call predecessors, (81), 52 states have call successors, (81) [2021-12-14 17:04:45,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 317 transitions. [2021-12-14 17:04:45,663 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 317 transitions. Word has length 106 [2021-12-14 17:04:45,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:04:45,665 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 317 transitions. [2021-12-14 17:04:45,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 11 states have internal predecessors, (47), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-12-14 17:04:45,665 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 317 transitions. [2021-12-14 17:04:45,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-14 17:04:45,666 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:04:45,666 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 17:04:45,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-14 17:04:45,667 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:04:45,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:04:45,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1690843138, now seen corresponding path program 1 times [2021-12-14 17:04:45,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:04:45,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437764283] [2021-12-14 17:04:45,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:45,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:04:45,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:46,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:04:46,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:46,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:46,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:46,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:04:46,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:46,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:04:46,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:46,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:04:46,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:46,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 17:04:46,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:46,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 17:04:46,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:46,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-14 17:04:46,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:46,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-14 17:04:46,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:46,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-14 17:04:46,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:46,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 17:04:46,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:46,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-14 17:04:46,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:46,292 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 17:04:46,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:04:46,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437764283] [2021-12-14 17:04:46,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437764283] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:04:46,293 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:04:46,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-14 17:04:46,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755977848] [2021-12-14 17:04:46,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:04:46,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-14 17:04:46,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:04:46,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-14 17:04:46,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-12-14 17:04:46,304 INFO L87 Difference]: Start difference. First operand 250 states and 317 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 15 states have internal predecessors, (56), 8 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-14 17:04:47,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:04:47,240 INFO L93 Difference]: Finished difference Result 371 states and 482 transitions. [2021-12-14 17:04:47,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-14 17:04:47,241 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 15 states have internal predecessors, (56), 8 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) Word has length 109 [2021-12-14 17:04:47,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:04:47,242 INFO L225 Difference]: With dead ends: 371 [2021-12-14 17:04:47,242 INFO L226 Difference]: Without dead ends: 293 [2021-12-14 17:04:47,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2021-12-14 17:04:47,243 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 147 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 1347 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 1445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 17:04:47,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 622 Invalid, 1445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1347 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 17:04:47,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-12-14 17:04:47,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 256. [2021-12-14 17:04:47,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 172 states have (on average 1.0755813953488371) internal successors, (185), 177 states have internal predecessors, (185), 56 states have call successors, (56), 25 states have call predecessors, (56), 27 states have return successors, (85), 53 states have call predecessors, (85), 54 states have call successors, (85) [2021-12-14 17:04:47,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 326 transitions. [2021-12-14 17:04:47,261 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 326 transitions. Word has length 109 [2021-12-14 17:04:47,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:04:47,262 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 326 transitions. [2021-12-14 17:04:47,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 15 states have internal predecessors, (56), 8 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-14 17:04:47,262 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 326 transitions. [2021-12-14 17:04:47,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-14 17:04:47,263 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:04:47,263 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 17:04:47,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-14 17:04:47,263 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:04:47,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:04:47,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1949008576, now seen corresponding path program 1 times [2021-12-14 17:04:47,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:04:47,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866979586] [2021-12-14 17:04:47,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:47,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:04:47,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:47,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:04:47,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:47,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:47,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:47,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:04:47,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:47,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:04:47,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:47,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:04:47,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:47,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 17:04:47,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:47,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 17:04:47,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:47,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-14 17:04:47,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:47,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-14 17:04:47,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:47,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-14 17:04:47,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:47,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 17:04:47,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:47,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-14 17:04:47,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:47,430 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 17:04:47,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:04:47,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866979586] [2021-12-14 17:04:47,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866979586] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:04:47,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:04:47,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 17:04:47,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658384217] [2021-12-14 17:04:47,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:04:47,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 17:04:47,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:04:47,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 17:04:47,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:04:47,432 INFO L87 Difference]: Start difference. First operand 256 states and 326 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2021-12-14 17:04:47,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:04:47,581 INFO L93 Difference]: Finished difference Result 337 states and 437 transitions. [2021-12-14 17:04:47,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:04:47,582 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 17:04:47,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:04:47,584 INFO L225 Difference]: With dead ends: 337 [2021-12-14 17:04:47,585 INFO L226 Difference]: Without dead ends: 248 [2021-12-14 17:04:47,588 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 17:04:47,589 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 44 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:04:47,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 248 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 17:04:47,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-12-14 17:04:47,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 248. [2021-12-14 17:04:47,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 166 states have (on average 1.072289156626506) internal successors, (178), 170 states have internal predecessors, (178), 55 states have call successors, (55), 25 states have call predecessors, (55), 26 states have return successors, (75), 52 states have call predecessors, (75), 53 states have call successors, (75) [2021-12-14 17:04:47,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 308 transitions. [2021-12-14 17:04:47,600 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 308 transitions. Word has length 109 [2021-12-14 17:04:47,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:04:47,601 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 308 transitions. [2021-12-14 17:04:47,601 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 17:04:47,601 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 308 transitions. [2021-12-14 17:04:47,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-14 17:04:47,602 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:04:47,603 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:04:47,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-14 17:04:47,603 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:04:47,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:04:47,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1466498319, now seen corresponding path program 1 times [2021-12-14 17:04:47,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:04:47,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300575522] [2021-12-14 17:04:47,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:47,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:04:47,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:47,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:04:47,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:47,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:47,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:47,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:04:47,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:47,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:04:47,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:47,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:04:47,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:47,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:04:47,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:47,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:47,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:47,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:04:47,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:47,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:04:47,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:47,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:04:47,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:47,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:04:47,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:47,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-14 17:04:47,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:47,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-14 17:04:47,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:47,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 17:04:47,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:47,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-14 17:04:47,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:47,792 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-12-14 17:04:47,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:04:47,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300575522] [2021-12-14 17:04:47,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300575522] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:04:47,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:04:47,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 17:04:47,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460683787] [2021-12-14 17:04:47,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:04:47,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 17:04:47,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:04:47,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 17:04:47,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 17:04:47,796 INFO L87 Difference]: Start difference. First operand 248 states and 308 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-14 17:04:47,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:04:47,972 INFO L93 Difference]: Finished difference Result 261 states and 321 transitions. [2021-12-14 17:04:47,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 17:04:47,973 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 112 [2021-12-14 17:04:47,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:04:47,975 INFO L225 Difference]: With dead ends: 261 [2021-12-14 17:04:47,975 INFO L226 Difference]: Without dead ends: 245 [2021-12-14 17:04:47,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-14 17:04:47,976 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 50 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:04:47,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 230 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 17:04:47,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-12-14 17:04:47,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2021-12-14 17:04:47,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 164 states have (on average 1.0670731707317074) internal successors, (175), 167 states have internal predecessors, (175), 55 states have call successors, (55), 25 states have call predecessors, (55), 25 states have return successors, (74), 52 states have call predecessors, (74), 53 states have call successors, (74) [2021-12-14 17:04:47,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 304 transitions. [2021-12-14 17:04:47,996 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 304 transitions. Word has length 112 [2021-12-14 17:04:47,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:04:47,997 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 304 transitions. [2021-12-14 17:04:47,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-14 17:04:47,997 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 304 transitions. [2021-12-14 17:04:47,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-14 17:04:47,998 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:04:47,998 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:04:47,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-14 17:04:47,999 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:04:47,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:04:47,999 INFO L85 PathProgramCache]: Analyzing trace with hash 964794292, now seen corresponding path program 1 times [2021-12-14 17:04:47,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:04:47,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278862499] [2021-12-14 17:04:47,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:47,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:04:48,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:48,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:04:48,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:48,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:48,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:48,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:04:48,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:48,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:04:48,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:48,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:04:48,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:48,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:04:48,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:48,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:48,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:48,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:04:48,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:48,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:04:48,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:48,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:04:48,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:48,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:04:48,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:48,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-14 17:04:48,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:48,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-14 17:04:48,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:48,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 17:04:48,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:48,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-14 17:04:48,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:48,207 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 17:04:48,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:04:48,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278862499] [2021-12-14 17:04:48,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278862499] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:04:48,209 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:04:48,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 17:04:48,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873164448] [2021-12-14 17:04:48,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:04:48,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 17:04:48,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:04:48,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 17:04:48,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-14 17:04:48,211 INFO L87 Difference]: Start difference. First operand 245 states and 304 transitions. Second operand has 9 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-12-14 17:04:48,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:04:48,467 INFO L93 Difference]: Finished difference Result 253 states and 312 transitions. [2021-12-14 17:04:48,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 17:04:48,468 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 114 [2021-12-14 17:04:48,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:04:48,469 INFO L225 Difference]: With dead ends: 253 [2021-12-14 17:04:48,469 INFO L226 Difference]: Without dead ends: 251 [2021-12-14 17:04:48,470 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 17:04:48,470 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 49 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 17:04:48,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 515 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 17:04:48,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-12-14 17:04:48,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 250. [2021-12-14 17:04:48,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 167 states have (on average 1.0658682634730539) internal successors, (178), 170 states have internal predecessors, (178), 56 states have call successors, (56), 26 states have call predecessors, (56), 26 states have return successors, (75), 53 states have call predecessors, (75), 54 states have call successors, (75) [2021-12-14 17:04:48,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 309 transitions. [2021-12-14 17:04:48,481 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 309 transitions. Word has length 114 [2021-12-14 17:04:48,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:04:48,481 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 309 transitions. [2021-12-14 17:04:48,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-12-14 17:04:48,482 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 309 transitions. [2021-12-14 17:04:48,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-14 17:04:48,483 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:04:48,483 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 17:04:48,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-14 17:04:48,483 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:04:48,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:04:48,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1411369220, now seen corresponding path program 1 times [2021-12-14 17:04:48,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:04:48,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772777507] [2021-12-14 17:04:48,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:48,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:04:48,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:48,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:04:48,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:48,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:04:48,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:48,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:04:48,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:48,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:04:48,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:48,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:04:48,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:48,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 17:04:48,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:48,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 17:04:48,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:48,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-14 17:04:48,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:48,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-14 17:04:48,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:48,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-14 17:04:48,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:48,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 17:04:48,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:48,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 17:04:48,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:49,067 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 17:04:49,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:04:49,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772777507] [2021-12-14 17:04:49,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772777507] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:04:49,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046925219] [2021-12-14 17:04:49,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:04:49,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:04:49,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:04:49,069 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 17:04:49,070 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 17:04:49,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:04:49,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 2692 conjuncts, 89 conjunts are in the unsatisfiable core [2021-12-14 17:04:49,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:04:49,549 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 17:04:53,732 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 17:04:53,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2021-12-14 17:04:53,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-12-14 17:04:53,791 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 17:04:53,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 27 [2021-12-14 17:04:53,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-12-14 17:05:00,501 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 17:05:00,511 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 17:05:00,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 34 [2021-12-14 17:05:00,520 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 17:05:00,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 32 [2021-12-14 17:05:00,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-12-14 17:05:01,224 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 46 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-14 17:05:01,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:05:01,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-14 17:05:01,857 WARN L838 $PredicateComparison]: unable to prove that (forall ((|aws_byte_cursor_right_trim_pred_~#trimmed~0.base| Int) (v_ArrVal_790 (Array Int Int)) (v_ArrVal_792 (Array Int Int))) (let ((.cse0 (+ c_aws_byte_cursor_right_trim_pred_~source.offset 8))) (or (not (= (select (select (store |c_#memory_$Pointer$.base| |aws_byte_cursor_right_trim_pred_~#trimmed~0.base| v_ArrVal_790) c_aws_byte_cursor_right_trim_pred_~source.base) .cse0) 0)) (not (= (select (select (store |c_#memory_$Pointer$.offset| |aws_byte_cursor_right_trim_pred_~#trimmed~0.base| v_ArrVal_792) c_aws_byte_cursor_right_trim_pred_~source.base) .cse0) 0)) (and (= c_aws_byte_cursor_right_trim_pred_~source.base |aws_byte_cursor_right_trim_pred_~#trimmed~0.base|) (= c_aws_byte_cursor_right_trim_pred_~source.offset |c_aws_byte_cursor_right_trim_pred_~#trimmed~0.offset|))))) is different from false [2021-12-14 17:05:01,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046925219] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:05:01,925 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 17:05:01,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 30] total 48 [2021-12-14 17:05:01,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851364034] [2021-12-14 17:05:01,925 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 17:05:01,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-14 17:05:01,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:05:01,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-14 17:05:01,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=2923, Unknown=3, NotChecked=110, Total=3306 [2021-12-14 17:05:01,927 INFO L87 Difference]: Start difference. First operand 250 states and 309 transitions. Second operand has 48 states, 47 states have (on average 2.702127659574468) internal successors, (127), 42 states have internal predecessors, (127), 19 states have call successors, (27), 8 states have call predecessors, (27), 8 states have return successors, (24), 17 states have call predecessors, (24), 17 states have call successors, (24) [2021-12-14 17:05:03,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:05:03,638 INFO L93 Difference]: Finished difference Result 440 states and 549 transitions. [2021-12-14 17:05:03,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-14 17:05:03,639 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 2.702127659574468) internal successors, (127), 42 states have internal predecessors, (127), 19 states have call successors, (27), 8 states have call predecessors, (27), 8 states have return successors, (24), 17 states have call predecessors, (24), 17 states have call successors, (24) Word has length 112 [2021-12-14 17:05:03,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:05:03,640 INFO L225 Difference]: With dead ends: 440 [2021-12-14 17:05:03,640 INFO L226 Difference]: Without dead ends: 373 [2021-12-14 17:05:03,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 128 SyntacticMatches, 9 SemanticMatches, 86 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2540 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=613, Invalid=6870, Unknown=3, NotChecked=170, Total=7656 [2021-12-14 17:05:03,643 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 200 mSDsluCounter, 1388 mSDsCounter, 0 mSdLazyCounter, 1633 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 1517 SdHoareTripleChecker+Invalid, 2937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1148 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 17:05:03,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 1517 Invalid, 2937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1633 Invalid, 0 Unknown, 1148 Unchecked, 0.9s Time] [2021-12-14 17:05:03,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-12-14 17:05:03,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 291. [2021-12-14 17:05:03,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 201 states have (on average 1.0895522388059702) internal successors, (219), 206 states have internal predecessors, (219), 58 states have call successors, (58), 30 states have call predecessors, (58), 31 states have return successors, (78), 54 states have call predecessors, (78), 56 states have call successors, (78) [2021-12-14 17:05:03,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 355 transitions. [2021-12-14 17:05:03,659 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 355 transitions. Word has length 112 [2021-12-14 17:05:03,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:05:03,659 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 355 transitions. [2021-12-14 17:05:03,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 2.702127659574468) internal successors, (127), 42 states have internal predecessors, (127), 19 states have call successors, (27), 8 states have call predecessors, (27), 8 states have return successors, (24), 17 states have call predecessors, (24), 17 states have call successors, (24) [2021-12-14 17:05:03,659 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 355 transitions. [2021-12-14 17:05:03,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-14 17:05:03,660 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:05:03,660 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:05:03,681 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 17:05:03,878 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,SelfDestructingSolverStorable24 [2021-12-14 17:05:03,879 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:05:03,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:05:03,879 INFO L85 PathProgramCache]: Analyzing trace with hash 415964924, now seen corresponding path program 1 times [2021-12-14 17:05:03,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:05:03,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122536242] [2021-12-14 17:05:03,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:05:03,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:05:03,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:03,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:05:03,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:03,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:05:03,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:03,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:05:03,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:04,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:05:04,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:04,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:05:04,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:04,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:05:04,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:04,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:05:04,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:04,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:05:04,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:04,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:05:04,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:04,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:05:04,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:04,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:05:04,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:04,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-14 17:05:04,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:04,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-14 17:05:04,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:04,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 17:05:04,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:04,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-14 17:05:04,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:04,236 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 17:05:04,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:05:04,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122536242] [2021-12-14 17:05:04,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122536242] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:05:04,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579071177] [2021-12-14 17:05:04,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:05:04,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:05:04,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:05:04,244 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 17:05:04,245 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 17:05:04,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:04,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 2632 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-14 17:05:04,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:05:05,942 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 17:05:05,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:05:07,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579071177] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:05:07,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 17:05:07,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 30 [2021-12-14 17:05:07,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479192665] [2021-12-14 17:05:07,272 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 17:05:07,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-14 17:05:07,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:05:07,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-14 17:05:07,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1008, Unknown=1, NotChecked=0, Total=1122 [2021-12-14 17:05:07,273 INFO L87 Difference]: Start difference. First operand 291 states and 355 transitions. Second operand has 30 states, 29 states have (on average 3.3448275862068964) internal successors, (97), 26 states have internal predecessors, (97), 11 states have call successors, (31), 5 states have call predecessors, (31), 7 states have return successors, (30), 12 states have call predecessors, (30), 10 states have call successors, (30) [2021-12-14 17:05:08,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:05:08,874 INFO L93 Difference]: Finished difference Result 447 states and 555 transitions. [2021-12-14 17:05:08,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-14 17:05:08,874 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 3.3448275862068964) internal successors, (97), 26 states have internal predecessors, (97), 11 states have call successors, (31), 5 states have call predecessors, (31), 7 states have return successors, (30), 12 states have call predecessors, (30), 10 states have call successors, (30) Word has length 118 [2021-12-14 17:05:08,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:05:08,875 INFO L225 Difference]: With dead ends: 447 [2021-12-14 17:05:08,875 INFO L226 Difference]: Without dead ends: 364 [2021-12-14 17:05:08,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 151 SyntacticMatches, 13 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=280, Invalid=2581, Unknown=1, NotChecked=0, Total=2862 [2021-12-14 17:05:08,877 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 174 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 1852 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 2693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 715 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:05:08,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 791 Invalid, 2693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1852 Invalid, 0 Unknown, 715 Unchecked, 1.0s Time] [2021-12-14 17:05:08,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-12-14 17:05:08,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 316. [2021-12-14 17:05:08,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 218 states have (on average 1.0871559633027523) internal successors, (237), 225 states have internal predecessors, (237), 63 states have call successors, (63), 31 states have call predecessors, (63), 34 states have return successors, (85), 59 states have call predecessors, (85), 61 states have call successors, (85) [2021-12-14 17:05:08,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 385 transitions. [2021-12-14 17:05:08,894 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 385 transitions. Word has length 118 [2021-12-14 17:05:08,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:05:08,895 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 385 transitions. [2021-12-14 17:05:08,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 3.3448275862068964) internal successors, (97), 26 states have internal predecessors, (97), 11 states have call successors, (31), 5 states have call predecessors, (31), 7 states have return successors, (30), 12 states have call predecessors, (30), 10 states have call successors, (30) [2021-12-14 17:05:08,895 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 385 transitions. [2021-12-14 17:05:08,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-14 17:05:08,896 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:05:08,896 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:05:08,917 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 17:05:09,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:05:09,117 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:05:09,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:05:09,117 INFO L85 PathProgramCache]: Analyzing trace with hash 874799398, now seen corresponding path program 1 times [2021-12-14 17:05:09,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:05:09,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693014489] [2021-12-14 17:05:09,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:05:09,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:05:09,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:09,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:05:09,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:09,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:05:09,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:09,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:05:09,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:09,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:05:09,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:09,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:05:09,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:09,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 17:05:09,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:09,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 17:05:09,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:09,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-14 17:05:09,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:09,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-14 17:05:09,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:09,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-14 17:05:09,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:09,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 17:05:09,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:09,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-14 17:05:09,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:09,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-14 17:05:09,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:09,850 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 29 proven. 11 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-14 17:05:09,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:05:09,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693014489] [2021-12-14 17:05:09,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693014489] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:05:09,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839440025] [2021-12-14 17:05:09,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:05:09,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:05:09,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:05:09,852 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 17:05:09,853 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 17:05:10,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:05:10,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 2722 conjuncts, 74 conjunts are in the unsatisfiable core [2021-12-14 17:05:10,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:05:10,247 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 17:05:10,395 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-14 17:05:10,397 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 17:05:10,496 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