./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 791161d1 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-?-791161d [2022-07-22 22:20:50,952 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 22:20:50,954 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 22:20:50,981 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 22:20:50,981 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 22:20:50,982 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 22:20:50,983 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 22:20:50,985 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 22:20:50,986 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 22:20:50,988 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 22:20:50,989 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 22:20:50,990 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 22:20:50,990 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 22:20:50,991 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 22:20:50,992 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 22:20:50,993 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 22:20:50,994 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 22:20:50,995 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 22:20:50,996 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 22:20:50,998 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 22:20:50,999 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 22:20:51,003 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 22:20:51,004 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 22:20:51,004 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 22:20:51,005 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 22:20:51,008 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 22:20:51,010 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 22:20:51,011 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 22:20:51,012 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 22:20:51,012 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 22:20:51,013 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 22:20:51,014 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 22:20:51,015 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 22:20:51,016 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 22:20:51,016 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 22:20:51,017 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 22:20:51,018 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 22:20:51,018 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 22:20:51,019 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 22:20:51,019 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 22:20:51,020 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 22:20:51,020 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 22:20:51,021 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-07-22 22:20:51,039 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 22:20:51,040 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 22:20:51,040 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 22:20:51,040 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 22:20:51,041 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 22:20:51,041 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 22:20:51,042 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 22:20:51,042 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 22:20:51,042 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 22:20:51,042 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 22:20:51,043 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 22:20:51,043 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 22:20:51,043 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 22:20:51,043 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 22:20:51,043 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 22:20:51,043 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 22:20:51,044 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 22:20:51,044 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 22:20:51,044 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 22:20:51,044 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 22:20:51,045 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 22:20:51,045 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 22:20:51,045 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 22:20:51,045 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 22:20:51,045 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 22:20:51,046 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 22:20:51,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 22:20:51,046 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 22:20:51,046 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 22:20:51,046 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 22:20:51,047 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f85fffa00ce152c2185c303de3856b218143afacade5a3da3d11c284e86ce457 [2022-07-22 22:20:51,249 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 22:20:51,276 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 22:20:51,279 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 22:20:51,280 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 22:20:51,280 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 22:20:51,282 INFO L432 ainManager$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 [2022-07-22 22:20:51,346 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/324d294b8/eba9e44f3c844bc3b95dc01b176c5dc9/FLAG49bc20b35 [2022-07-22 22:20:52,032 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 22:20:52,033 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_cursor_right_trim_pred_harness.i [2022-07-22 22:20:52,062 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/324d294b8/eba9e44f3c844bc3b95dc01b176c5dc9/FLAG49bc20b35 [2022-07-22 22:20:52,358 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/324d294b8/eba9e44f3c844bc3b95dc01b176c5dc9 [2022-07-22 22:20:52,360 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 22:20:52,361 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 22:20:52,364 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 22:20:52,365 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 22:20:52,368 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 22:20:52,368 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 10:20:52" (1/1) ... [2022-07-22 22:20:52,369 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3396383 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:20:52, skipping insertion in model container [2022-07-22 22:20:52,370 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 10:20:52" (1/1) ... [2022-07-22 22:20:52,375 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 22:20:52,465 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 22:20:52,662 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] [2022-07-22 22:20:52,668 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] [2022-07-22 22:20:53,191 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:20:53,192 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:20:53,193 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:20:53,193 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:20:53,194 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:20:53,204 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:20:53,204 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:20:53,206 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:20:53,206 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:20:53,425 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-07-22 22:20:53,426 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-07-22 22:20:53,427 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-07-22 22:20:53,428 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-07-22 22:20:53,429 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-07-22 22:20:53,430 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-07-22 22:20:53,430 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-07-22 22:20:53,431 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-07-22 22:20:53,432 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-07-22 22:20:53,432 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-07-22 22:20:53,596 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-07-22 22:20:53,717 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:20:53,719 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:20:53,789 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 22:20:53,840 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 22:20:53,868 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] [2022-07-22 22:20:53,870 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] [2022-07-22 22:20:53,899 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:20:53,900 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:20:53,901 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:20:53,901 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:20:53,901 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:20:53,908 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:20:53,909 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:20:53,911 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:20:53,912 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:20:53,971 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-07-22 22:20:53,972 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-07-22 22:20:53,972 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-07-22 22:20:53,973 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-07-22 22:20:53,973 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-07-22 22:20:53,974 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-07-22 22:20:53,974 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-07-22 22:20:53,975 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-07-22 22:20:53,975 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-07-22 22:20:53,977 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-07-22 22:20:53,996 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-07-22 22:20:54,051 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:20:54,051 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:20:54,077 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 22:20:54,291 INFO L208 MainTranslator]: Completed translation [2022-07-22 22:20:54,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:20:54 WrapperNode [2022-07-22 22:20:54,292 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 22:20:54,293 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 22:20:54,293 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 22:20:54,293 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 22:20:54,299 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:20:54" (1/1) ... [2022-07-22 22:20:54,410 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:20:54" (1/1) ... [2022-07-22 22:20:54,490 INFO L137 Inliner]: procedures = 690, calls = 2620, calls flagged for inlining = 60, calls inlined = 8, statements flattened = 800 [2022-07-22 22:20:54,491 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 22:20:54,492 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 22:20:54,492 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 22:20:54,493 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 22:20:54,500 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:20:54" (1/1) ... [2022-07-22 22:20:54,500 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:20:54" (1/1) ... [2022-07-22 22:20:54,518 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:20:54" (1/1) ... [2022-07-22 22:20:54,519 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:20:54" (1/1) ... [2022-07-22 22:20:54,557 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:20:54" (1/1) ... [2022-07-22 22:20:54,561 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:20:54" (1/1) ... [2022-07-22 22:20:54,566 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:20:54" (1/1) ... [2022-07-22 22:20:54,573 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 22:20:54,574 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 22:20:54,574 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 22:20:54,574 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 22:20:54,575 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:20:54" (1/1) ... [2022-07-22 22:20:54,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 22:20:54,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:20:54,601 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 22:20:54,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 22:20:54,638 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2022-07-22 22:20:54,638 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2022-07-22 22:20:54,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 22:20:54,639 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-07-22 22:20:54,639 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-07-22 22:20:54,639 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 22:20:54,639 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-22 22:20:54,640 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-22 22:20:54,640 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-22 22:20:54,640 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 22:20:54,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-22 22:20:54,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 22:20:54,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 22:20:54,642 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-07-22 22:20:54,642 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-07-22 22:20:54,642 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2022-07-22 22:20:54,642 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2022-07-22 22:20:54,643 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-22 22:20:54,643 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-22 22:20:54,643 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 22:20:54,643 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-22 22:20:54,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-22 22:20:54,643 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~~uint8_t~0~TO~int [2022-07-22 22:20:54,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~~uint8_t~0~TO~int [2022-07-22 22:20:54,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 22:20:54,644 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_right_trim_pred [2022-07-22 22:20:54,644 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_right_trim_pred [2022-07-22 22:20:54,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 22:20:54,918 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 22:20:54,919 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 22:20:55,752 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 22:20:55,760 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 22:20:55,761 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-22 22:20:55,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 10:20:55 BoogieIcfgContainer [2022-07-22 22:20:55,763 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 22:20:55,767 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 22:20:55,767 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 22:20:55,769 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 22:20:55,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 10:20:52" (1/3) ... [2022-07-22 22:20:55,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59ef547e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 10:20:55, skipping insertion in model container [2022-07-22 22:20:55,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:20:54" (2/3) ... [2022-07-22 22:20:55,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59ef547e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 10:20:55, skipping insertion in model container [2022-07-22 22:20:55,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 10:20:55" (3/3) ... [2022-07-22 22:20:55,772 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_cursor_right_trim_pred_harness.i [2022-07-22 22:20:55,786 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 22:20:55,786 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 22:20:55,847 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 22:20:55,858 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7c1a5cde, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@cf86024 [2022-07-22 22:20:55,858 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 22:20:55,861 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) [2022-07-22 22:20:55,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-22 22:20:55,870 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:20:55,872 INFO L195 NwaCegarLoop]: 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] [2022-07-22 22:20:55,873 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:20:55,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:20:55,879 INFO L85 PathProgramCache]: Analyzing trace with hash 990555707, now seen corresponding path program 1 times [2022-07-22 22:20:55,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:20:55,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643234734] [2022-07-22 22:20:55,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:20:55,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:20:56,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:20:56,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 22:20:56,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:20:56,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 22:20:56,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:20:56,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 22:20:56,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:20:56,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-22 22:20:56,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:20:56,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-22 22:20:56,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:20:56,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-22 22:20:56,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:20:56,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-22 22:20:56,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:20:56,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 22:20:56,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:20:56,532 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-22 22:20:56,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:20:56,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643234734] [2022-07-22 22:20:56,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643234734] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:20:56,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:20:56,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 22:20:56,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808072719] [2022-07-22 22:20:56,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:20:56,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 22:20:56,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:20:56,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 22:20:56,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 22:20:56,568 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) [2022-07-22 22:20:56,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:20:56,593 INFO L93 Difference]: Finished difference Result 186 states and 253 transitions. [2022-07-22 22:20:56,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 22:20:56,595 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 [2022-07-22 22:20:56,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:20:56,602 INFO L225 Difference]: With dead ends: 186 [2022-07-22 22:20:56,604 INFO L226 Difference]: Without dead ends: 86 [2022-07-22 22:20:56,608 INFO L412 NwaCegarLoop]: 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 [2022-07-22 22:20:56,615 INFO L413 NwaCegarLoop]: 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 [2022-07-22 22:20:56,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 22:20:56,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-22 22:20:56,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-07-22 22:20:56,650 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) [2022-07-22 22:20:56,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 108 transitions. [2022-07-22 22:20:56,657 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 108 transitions. Word has length 61 [2022-07-22 22:20:56,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:20:56,658 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 108 transitions. [2022-07-22 22:20:56,658 INFO L496 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) [2022-07-22 22:20:56,658 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 108 transitions. [2022-07-22 22:20:56,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-22 22:20:56,662 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:20:56,663 INFO L195 NwaCegarLoop]: 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] [2022-07-22 22:20:56,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 22:20:56,663 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:20:56,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:20:56,664 INFO L85 PathProgramCache]: Analyzing trace with hash -89389740, now seen corresponding path program 1 times [2022-07-22 22:20:56,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:20:56,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027556684] [2022-07-22 22:20:56,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:20:56,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:20:56,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:20:56,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 22:20:56,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:20:56,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 22:20:56,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:20:56,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 22:20:56,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:20:56,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-22 22:20:56,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:20:56,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-22 22:20:56,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:20:56,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-22 22:20:56,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:20:56,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-22 22:20:56,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:20:56,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-22 22:20:56,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:20:56,994 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-22 22:20:56,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:20:56,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027556684] [2022-07-22 22:20:56,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027556684] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:20:56,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787815248] [2022-07-22 22:20:56,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:20:56,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:20:56,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:20:57,003 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 22:20:57,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 22:20:57,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:20:57,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 2488 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 22:20:57,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:20:57,636 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-22 22:20:57,637 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 22:20:57,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787815248] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:20:57,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 22:20:57,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2022-07-22 22:20:57,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184098945] [2022-07-22 22:20:57,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:20:57,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 22:20:57,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:20:57,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 22:20:57,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-07-22 22:20:57,640 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) [2022-07-22 22:20:57,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:20:57,771 INFO L93 Difference]: Finished difference Result 155 states and 200 transitions. [2022-07-22 22:20:57,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 22:20:57,771 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 63 [2022-07-22 22:20:57,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:20:57,774 INFO L225 Difference]: With dead ends: 155 [2022-07-22 22:20:57,774 INFO L226 Difference]: Without dead ends: 89 [2022-07-22 22:20:57,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-07-22 22:20:57,776 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 124 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 22:20:57,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 227 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 22:20:57,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-22 22:20:57,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-07-22 22:20:57,789 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) [2022-07-22 22:20:57,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 114 transitions. [2022-07-22 22:20:57,791 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 114 transitions. Word has length 63 [2022-07-22 22:20:57,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:20:57,791 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 114 transitions. [2022-07-22 22:20:57,791 INFO L496 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) [2022-07-22 22:20:57,792 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 114 transitions. [2022-07-22 22:20:57,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-22 22:20:57,794 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:20:57,794 INFO L195 NwaCegarLoop]: 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] [2022-07-22 22:20:57,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 22:20:58,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:20:58,008 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:20:58,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:20:58,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1896344881, now seen corresponding path program 1 times [2022-07-22 22:20:58,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:20:58,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682381133] [2022-07-22 22:20:58,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:20:58,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:20:58,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:20:58,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 22:20:58,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:20:58,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 22:20:58,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:20:58,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 22:20:58,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:20:58,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 22:20:58,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:20:58,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-22 22:20:58,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:20:58,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-22 22:20:58,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:20:58,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-22 22:20:58,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:20:58,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-22 22:20:58,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:20:58,310 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-22 22:20:58,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:20:58,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682381133] [2022-07-22 22:20:58,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682381133] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:20:58,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510396752] [2022-07-22 22:20:58,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:20:58,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:20:58,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:20:58,315 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 22:20:58,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 22:20:58,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:20:58,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 2493 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 22:20:58,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:20:58,849 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 22:20:58,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 22:20:58,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510396752] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:20:58,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 22:20:58,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2022-07-22 22:20:58,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806601349] [2022-07-22 22:20:58,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:20:58,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 22:20:58,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:20:58,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 22:20:58,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-07-22 22:20:58,853 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) [2022-07-22 22:20:59,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:20:59,028 INFO L93 Difference]: Finished difference Result 148 states and 189 transitions. [2022-07-22 22:20:59,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 22:20:59,028 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 [2022-07-22 22:20:59,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:20:59,030 INFO L225 Difference]: With dead ends: 148 [2022-07-22 22:20:59,030 INFO L226 Difference]: Without dead ends: 89 [2022-07-22 22:20:59,031 INFO L412 NwaCegarLoop]: 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 [2022-07-22 22:20:59,031 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 135 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 22:20:59,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 333 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 22:20:59,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-22 22:20:59,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-07-22 22:20:59,040 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) [2022-07-22 22:20:59,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 112 transitions. [2022-07-22 22:20:59,041 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 112 transitions. Word has length 65 [2022-07-22 22:20:59,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:20:59,041 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 112 transitions. [2022-07-22 22:20:59,042 INFO L496 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) [2022-07-22 22:20:59,042 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 112 transitions. [2022-07-22 22:20:59,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-22 22:20:59,044 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:20:59,044 INFO L195 NwaCegarLoop]: 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] [2022-07-22 22:20:59,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 22:20:59,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-22 22:20:59,272 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:20:59,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:20:59,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1793788399, now seen corresponding path program 1 times [2022-07-22 22:20:59,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:20:59,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290053803] [2022-07-22 22:20:59,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:20:59,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:20:59,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:20:59,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 22:20:59,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:20:59,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 22:20:59,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:20:59,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 22:20:59,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:20:59,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 22:20:59,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:20:59,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-22 22:20:59,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:20:59,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-22 22:20:59,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:20:59,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-22 22:20:59,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:20:59,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-07-22 22:20:59,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:20:59,605 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-22 22:20:59,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:20:59,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290053803] [2022-07-22 22:20:59,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290053803] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:20:59,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:20:59,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 22:20:59,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741538805] [2022-07-22 22:20:59,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:20:59,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 22:20:59,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:20:59,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 22:20:59,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 22:20:59,607 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) [2022-07-22 22:20:59,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:20:59,675 INFO L93 Difference]: Finished difference Result 101 states and 129 transitions. [2022-07-22 22:20:59,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 22:20:59,676 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 [2022-07-22 22:20:59,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:20:59,678 INFO L225 Difference]: With dead ends: 101 [2022-07-22 22:20:59,678 INFO L226 Difference]: Without dead ends: 99 [2022-07-22 22:20:59,678 INFO L412 NwaCegarLoop]: 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 [2022-07-22 22:20:59,680 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 16 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 22:20:59,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 717 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 22:20:59,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-22 22:20:59,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2022-07-22 22:20:59,693 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) [2022-07-22 22:20:59,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 126 transitions. [2022-07-22 22:20:59,694 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 126 transitions. Word has length 69 [2022-07-22 22:20:59,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:20:59,695 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 126 transitions. [2022-07-22 22:20:59,695 INFO L496 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) [2022-07-22 22:20:59,695 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 126 transitions. [2022-07-22 22:20:59,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-22 22:20:59,697 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:20:59,697 INFO L195 NwaCegarLoop]: 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] [2022-07-22 22:20:59,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 22:20:59,698 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:20:59,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:20:59,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1240513463, now seen corresponding path program 1 times [2022-07-22 22:20:59,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:20:59,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570656920] [2022-07-22 22:20:59,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:20:59,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:20:59,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:20:59,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 22:20:59,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:20:59,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 22:20:59,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:20:59,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 22:20:59,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:20:59,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 22:20:59,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:00,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-22 22:21:00,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:00,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-22 22:21:00,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:00,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-22 22:21:00,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:00,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-07-22 22:21:00,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:00,172 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-22 22:21:00,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:21:00,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570656920] [2022-07-22 22:21:00,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570656920] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:21:00,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582492619] [2022-07-22 22:21:00,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:21:00,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:21:00,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:21:00,176 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 22:21:00,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 22:21:00,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:00,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 2515 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-22 22:21:00,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:21:01,552 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-22 22:21:01,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:21:01,827 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-07-22 22:21:01,872 INFO L356 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-07-22 22:21:01,873 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-07-22 22:21:01,885 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-22 22:21:01,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582492619] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 22:21:01,885 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 22:21:01,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 11] total 23 [2022-07-22 22:21:01,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814604688] [2022-07-22 22:21:01,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 22:21:01,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-22 22:21:01,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:21:01,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-22 22:21:01,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-07-22 22:21:01,887 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) [2022-07-22 22:21:02,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:21:02,733 INFO L93 Difference]: Finished difference Result 233 states and 314 transitions. [2022-07-22 22:21:02,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-22 22:21:02,734 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 [2022-07-22 22:21:02,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:21:02,736 INFO L225 Difference]: With dead ends: 233 [2022-07-22 22:21:02,736 INFO L226 Difference]: Without dead ends: 152 [2022-07-22 22:21:02,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 140 SyntacticMatches, 13 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2022-07-22 22:21:02,738 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 121 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 22:21:02,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 784 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 632 Invalid, 0 Unknown, 169 Unchecked, 0.6s Time] [2022-07-22 22:21:02,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-07-22 22:21:02,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 137. [2022-07-22 22:21:02,754 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) [2022-07-22 22:21:02,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 177 transitions. [2022-07-22 22:21:02,755 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 177 transitions. Word has length 73 [2022-07-22 22:21:02,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:21:02,755 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 177 transitions. [2022-07-22 22:21:02,756 INFO L496 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) [2022-07-22 22:21:02,756 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 177 transitions. [2022-07-22 22:21:02,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-22 22:21:02,757 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:21:02,757 INFO L195 NwaCegarLoop]: 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] [2022-07-22 22:21:02,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 22:21:02,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:21:02,984 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:21:02,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:21:02,984 INFO L85 PathProgramCache]: Analyzing trace with hash 295115559, now seen corresponding path program 1 times [2022-07-22 22:21:02,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:21:02,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815374245] [2022-07-22 22:21:02,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:21:02,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:21:03,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:03,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 22:21:03,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:03,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 22:21:03,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:03,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 22:21:03,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:03,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 22:21:03,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:03,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-22 22:21:03,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:03,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-22 22:21:03,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:03,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-22 22:21:03,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:03,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-22 22:21:03,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:03,158 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-22 22:21:03,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:21:03,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815374245] [2022-07-22 22:21:03,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815374245] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:21:03,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:21:03,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 22:21:03,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016774189] [2022-07-22 22:21:03,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:21:03,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 22:21:03,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:21:03,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 22:21:03,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 22:21:03,160 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) [2022-07-22 22:21:03,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:21:03,175 INFO L93 Difference]: Finished difference Result 199 states and 259 transitions. [2022-07-22 22:21:03,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 22:21:03,176 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 [2022-07-22 22:21:03,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:21:03,177 INFO L225 Difference]: With dead ends: 199 [2022-07-22 22:21:03,177 INFO L226 Difference]: Without dead ends: 139 [2022-07-22 22:21:03,177 INFO L412 NwaCegarLoop]: 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 [2022-07-22 22:21:03,178 INFO L413 NwaCegarLoop]: 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 [2022-07-22 22:21:03,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 209 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 22:21:03,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-07-22 22:21:03,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2022-07-22 22:21:03,190 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) [2022-07-22 22:21:03,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 178 transitions. [2022-07-22 22:21:03,191 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 178 transitions. Word has length 76 [2022-07-22 22:21:03,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:21:03,191 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 178 transitions. [2022-07-22 22:21:03,192 INFO L496 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) [2022-07-22 22:21:03,192 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 178 transitions. [2022-07-22 22:21:03,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-22 22:21:03,193 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:21:03,193 INFO L195 NwaCegarLoop]: 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] [2022-07-22 22:21:03,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 22:21:03,193 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:21:03,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:21:03,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1625051706, now seen corresponding path program 1 times [2022-07-22 22:21:03,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:21:03,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382090669] [2022-07-22 22:21:03,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:21:03,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:21:03,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:03,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 22:21:03,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:03,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 22:21:03,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:03,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 22:21:03,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:03,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 22:21:03,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:03,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-22 22:21:03,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:03,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-22 22:21:03,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:03,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-22 22:21:03,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:03,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-07-22 22:21:03,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:03,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-22 22:21:03,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:03,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-22 22:21:03,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:03,378 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-22 22:21:03,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:21:03,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382090669] [2022-07-22 22:21:03,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382090669] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:21:03,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:21:03,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 22:21:03,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054996247] [2022-07-22 22:21:03,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:21:03,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 22:21:03,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:21:03,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 22:21:03,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 22:21:03,380 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) [2022-07-22 22:21:03,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:21:03,410 INFO L93 Difference]: Finished difference Result 181 states and 230 transitions. [2022-07-22 22:21:03,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 22:21:03,410 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 [2022-07-22 22:21:03,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:21:03,411 INFO L225 Difference]: With dead ends: 181 [2022-07-22 22:21:03,412 INFO L226 Difference]: Without dead ends: 139 [2022-07-22 22:21:03,412 INFO L412 NwaCegarLoop]: 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 [2022-07-22 22:21:03,412 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 18 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 22:21:03,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 283 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 22:21:03,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-07-22 22:21:03,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2022-07-22 22:21:03,423 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) [2022-07-22 22:21:03,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 177 transitions. [2022-07-22 22:21:03,425 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 177 transitions. Word has length 81 [2022-07-22 22:21:03,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:21:03,425 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 177 transitions. [2022-07-22 22:21:03,425 INFO L496 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) [2022-07-22 22:21:03,425 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 177 transitions. [2022-07-22 22:21:03,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-22 22:21:03,426 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:21:03,427 INFO L195 NwaCegarLoop]: 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] [2022-07-22 22:21:03,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 22:21:03,427 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:21:03,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:21:03,427 INFO L85 PathProgramCache]: Analyzing trace with hash -2069482329, now seen corresponding path program 1 times [2022-07-22 22:21:03,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:21:03,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858917825] [2022-07-22 22:21:03,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:21:03,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:21:03,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:03,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 22:21:03,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:03,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 22:21:03,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:03,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 22:21:03,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:03,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-22 22:21:03,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:03,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-22 22:21:03,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:03,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-22 22:21:03,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:03,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-07-22 22:21:03,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:03,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-22 22:21:03,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:03,723 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-22 22:21:03,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:21:03,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858917825] [2022-07-22 22:21:03,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858917825] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:21:03,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964141406] [2022-07-22 22:21:03,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:21:03,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:21:03,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:21:03,728 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 22:21:03,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 22:21:04,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:04,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 2539 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-22 22:21:04,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:21:04,210 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 22:21:04,210 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 22:21:04,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964141406] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:21:04,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 22:21:04,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 10 [2022-07-22 22:21:04,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970266368] [2022-07-22 22:21:04,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:21:04,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 22:21:04,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:21:04,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 22:21:04,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-22 22:21:04,212 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) [2022-07-22 22:21:04,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:21:04,337 INFO L93 Difference]: Finished difference Result 237 states and 308 transitions. [2022-07-22 22:21:04,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 22:21:04,337 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 [2022-07-22 22:21:04,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:21:04,339 INFO L225 Difference]: With dead ends: 237 [2022-07-22 22:21:04,340 INFO L226 Difference]: Without dead ends: 144 [2022-07-22 22:21:04,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-07-22 22:21:04,341 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 12 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 22:21:04,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 787 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 22:21:04,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-07-22 22:21:04,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2022-07-22 22:21:04,352 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) [2022-07-22 22:21:04,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 186 transitions. [2022-07-22 22:21:04,353 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 186 transitions. Word has length 81 [2022-07-22 22:21:04,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:21:04,354 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 186 transitions. [2022-07-22 22:21:04,354 INFO L496 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) [2022-07-22 22:21:04,354 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 186 transitions. [2022-07-22 22:21:04,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-22 22:21:04,355 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:21:04,355 INFO L195 NwaCegarLoop]: 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] [2022-07-22 22:21:04,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 22:21:04,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:21:04,575 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:21:04,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:21:04,576 INFO L85 PathProgramCache]: Analyzing trace with hash -442406659, now seen corresponding path program 1 times [2022-07-22 22:21:04,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:21:04,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914538814] [2022-07-22 22:21:04,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:21:04,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:21:04,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:04,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 22:21:04,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:04,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 22:21:04,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:04,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 22:21:04,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:04,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 22:21:04,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:04,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-22 22:21:04,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:04,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-22 22:21:04,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:04,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-22 22:21:04,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:04,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-07-22 22:21:04,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:04,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-22 22:21:04,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:04,969 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-22 22:21:04,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:21:04,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914538814] [2022-07-22 22:21:04,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914538814] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:21:04,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078174311] [2022-07-22 22:21:04,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:21:04,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:21:04,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:21:04,972 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 22:21:04,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 22:21:05,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:05,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 2566 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-22 22:21:05,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:21:05,438 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 22:21:05,990 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-22 22:21:05,991 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 32 [2022-07-22 22:21:06,004 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-22 22:21:06,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:21:06,221 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-22 22:21:06,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078174311] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 22:21:06,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 22:21:06,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 10] total 20 [2022-07-22 22:21:06,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314452368] [2022-07-22 22:21:06,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 22:21:06,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-22 22:21:06,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:21:06,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-22 22:21:06,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-07-22 22:21:06,223 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) [2022-07-22 22:21:07,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:21:07,196 INFO L93 Difference]: Finished difference Result 250 states and 337 transitions. [2022-07-22 22:21:07,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-22 22:21:07,197 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 [2022-07-22 22:21:07,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:21:07,198 INFO L225 Difference]: With dead ends: 250 [2022-07-22 22:21:07,198 INFO L226 Difference]: Without dead ends: 177 [2022-07-22 22:21:07,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 163 SyntacticMatches, 11 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2022-07-22 22:21:07,200 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 102 mSDsluCounter, 1005 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 1115 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 22:21:07,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 1115 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 759 Invalid, 0 Unknown, 173 Unchecked, 0.7s Time] [2022-07-22 22:21:07,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-07-22 22:21:07,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 154. [2022-07-22 22:21:07,211 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) [2022-07-22 22:21:07,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 195 transitions. [2022-07-22 22:21:07,212 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 195 transitions. Word has length 82 [2022-07-22 22:21:07,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:21:07,213 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 195 transitions. [2022-07-22 22:21:07,213 INFO L496 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) [2022-07-22 22:21:07,213 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 195 transitions. [2022-07-22 22:21:07,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-22 22:21:07,214 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:21:07,214 INFO L195 NwaCegarLoop]: 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] [2022-07-22 22:21:07,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 22:21:07,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:21:07,431 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:21:07,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:21:07,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1702906197, now seen corresponding path program 1 times [2022-07-22 22:21:07,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:21:07,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389866588] [2022-07-22 22:21:07,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:21:07,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:21:07,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:07,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 22:21:07,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:07,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 22:21:07,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:07,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 22:21:07,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:07,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 22:21:07,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:07,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-22 22:21:07,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:07,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-22 22:21:07,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:07,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-22 22:21:07,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:07,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-07-22 22:21:07,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:07,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-22 22:21:07,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:07,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-22 22:21:07,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:07,688 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-22 22:21:07,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:21:07,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389866588] [2022-07-22 22:21:07,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389866588] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:21:07,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:21:07,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 22:21:07,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935453956] [2022-07-22 22:21:07,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:21:07,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 22:21:07,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:21:07,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 22:21:07,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 22:21:07,691 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) [2022-07-22 22:21:07,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:21:07,762 INFO L93 Difference]: Finished difference Result 164 states and 206 transitions. [2022-07-22 22:21:07,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 22:21:07,762 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 [2022-07-22 22:21:07,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:21:07,763 INFO L225 Difference]: With dead ends: 164 [2022-07-22 22:21:07,763 INFO L226 Difference]: Without dead ends: 162 [2022-07-22 22:21:07,764 INFO L412 NwaCegarLoop]: 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 [2022-07-22 22:21:07,765 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 16 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 22:21:07,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 725 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 22:21:07,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-07-22 22:21:07,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2022-07-22 22:21:07,781 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) [2022-07-22 22:21:07,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 202 transitions. [2022-07-22 22:21:07,783 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 202 transitions. Word has length 83 [2022-07-22 22:21:07,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:21:07,784 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 202 transitions. [2022-07-22 22:21:07,784 INFO L496 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) [2022-07-22 22:21:07,784 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 202 transitions. [2022-07-22 22:21:07,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-22 22:21:07,785 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:21:07,785 INFO L195 NwaCegarLoop]: 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] [2022-07-22 22:21:07,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 22:21:07,786 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:21:07,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:21:07,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1271029248, now seen corresponding path program 1 times [2022-07-22 22:21:07,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:21:07,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781550146] [2022-07-22 22:21:07,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:21:07,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:21:07,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:07,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 22:21:07,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:07,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 22:21:07,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:07,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 22:21:07,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:07,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-22 22:21:07,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:07,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-22 22:21:07,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:08,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-22 22:21:08,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:08,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-22 22:21:08,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:08,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-22 22:21:08,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:08,046 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-22 22:21:08,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:21:08,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781550146] [2022-07-22 22:21:08,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781550146] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:21:08,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189559554] [2022-07-22 22:21:08,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:21:08,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:21:08,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:21:08,050 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 22:21:08,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 22:21:08,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:08,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 2549 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-22 22:21:08,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:21:08,520 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 22:21:08,521 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 22:21:08,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189559554] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:21:08,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 22:21:08,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 10 [2022-07-22 22:21:08,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364509456] [2022-07-22 22:21:08,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:21:08,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 22:21:08,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:21:08,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 22:21:08,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-22 22:21:08,525 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) [2022-07-22 22:21:08,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:21:08,630 INFO L93 Difference]: Finished difference Result 246 states and 313 transitions. [2022-07-22 22:21:08,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 22:21:08,631 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 [2022-07-22 22:21:08,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:21:08,633 INFO L225 Difference]: With dead ends: 246 [2022-07-22 22:21:08,633 INFO L226 Difference]: Without dead ends: 160 [2022-07-22 22:21:08,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-07-22 22:21:08,634 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 12 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 22:21:08,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 781 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 22:21:08,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-07-22 22:21:08,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2022-07-22 22:21:08,644 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) [2022-07-22 22:21:08,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 201 transitions. [2022-07-22 22:21:08,646 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 201 transitions. Word has length 83 [2022-07-22 22:21:08,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:21:08,647 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 201 transitions. [2022-07-22 22:21:08,647 INFO L496 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) [2022-07-22 22:21:08,647 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 201 transitions. [2022-07-22 22:21:08,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-22 22:21:08,650 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:21:08,650 INFO L195 NwaCegarLoop]: 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] [2022-07-22 22:21:08,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 22:21:08,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:21:08,863 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:21:08,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:21:08,864 INFO L85 PathProgramCache]: Analyzing trace with hash 558656115, now seen corresponding path program 1 times [2022-07-22 22:21:08,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:21:08,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236677030] [2022-07-22 22:21:08,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:21:08,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:21:08,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:09,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 22:21:09,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:09,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 22:21:09,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:09,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 22:21:09,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:09,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 22:21:09,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:09,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-22 22:21:09,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:09,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-22 22:21:09,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:09,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-22 22:21:09,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:09,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-07-22 22:21:09,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:09,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-22 22:21:09,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:09,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-22 22:21:09,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:09,279 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-22 22:21:09,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:21:09,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236677030] [2022-07-22 22:21:09,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236677030] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:21:09,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653720103] [2022-07-22 22:21:09,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:21:09,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:21:09,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:21:09,282 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 22:21:09,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 22:21:09,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:09,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 2547 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-22 22:21:09,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:21:09,799 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 22:21:10,755 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 31 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-22 22:21:10,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:21:10,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653720103] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:21:10,983 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 22:21:10,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 24 [2022-07-22 22:21:10,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824319372] [2022-07-22 22:21:10,983 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 22:21:10,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-22 22:21:10,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:21:10,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-22 22:21:10,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2022-07-22 22:21:10,985 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) [2022-07-22 22:21:12,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:21:12,343 INFO L93 Difference]: Finished difference Result 270 states and 352 transitions. [2022-07-22 22:21:12,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-22 22:21:12,343 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 [2022-07-22 22:21:12,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:21:12,345 INFO L225 Difference]: With dead ends: 270 [2022-07-22 22:21:12,345 INFO L226 Difference]: Without dead ends: 209 [2022-07-22 22:21:12,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 117 SyntacticMatches, 15 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=235, Invalid=1487, Unknown=0, NotChecked=0, Total=1722 [2022-07-22 22:21:12,346 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 138 mSDsluCounter, 1211 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 1344 SdHoareTripleChecker+Invalid, 1536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 435 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 22:21:12,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 1344 Invalid, 1536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1056 Invalid, 0 Unknown, 435 Unchecked, 0.8s Time] [2022-07-22 22:21:12,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-07-22 22:21:12,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 174. [2022-07-22 22:21:12,359 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) [2022-07-22 22:21:12,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 212 transitions. [2022-07-22 22:21:12,360 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 212 transitions. Word has length 87 [2022-07-22 22:21:12,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:21:12,361 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 212 transitions. [2022-07-22 22:21:12,361 INFO L496 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) [2022-07-22 22:21:12,361 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 212 transitions. [2022-07-22 22:21:12,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-22 22:21:12,362 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:21:12,362 INFO L195 NwaCegarLoop]: 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] [2022-07-22 22:21:12,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 22:21:12,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:21:12,576 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:21:12,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:21:12,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1900291175, now seen corresponding path program 2 times [2022-07-22 22:21:12,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:21:12,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138958170] [2022-07-22 22:21:12,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:21:12,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:21:12,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:12,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 22:21:12,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:12,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 22:21:12,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:12,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 22:21:12,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:12,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-22 22:21:12,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:12,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-22 22:21:12,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:12,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-22 22:21:12,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:12,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-22 22:21:12,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:12,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-22 22:21:12,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:12,945 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-22 22:21:12,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:21:12,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138958170] [2022-07-22 22:21:12,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138958170] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:21:12,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852650759] [2022-07-22 22:21:12,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 22:21:12,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:21:12,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:21:12,948 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 22:21:12,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 22:21:13,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-22 22:21:13,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 22:21:13,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 2326 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-22 22:21:13,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:21:13,693 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-22 22:21:13,693 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 22:21:13,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852650759] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:21:13,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 22:21:13,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 17 [2022-07-22 22:21:13,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13193740] [2022-07-22 22:21:13,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:21:13,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 22:21:13,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:21:13,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 22:21:13,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-07-22 22:21:13,696 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) [2022-07-22 22:21:13,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:21:13,835 INFO L93 Difference]: Finished difference Result 254 states and 311 transitions. [2022-07-22 22:21:13,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 22:21:13,836 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 [2022-07-22 22:21:13,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:21:13,837 INFO L225 Difference]: With dead ends: 254 [2022-07-22 22:21:13,837 INFO L226 Difference]: Without dead ends: 191 [2022-07-22 22:21:13,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-07-22 22:21:13,838 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 21 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 22:21:13,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 598 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 122 Unchecked, 0.1s Time] [2022-07-22 22:21:13,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-07-22 22:21:13,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2022-07-22 22:21:13,850 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) [2022-07-22 22:21:13,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 233 transitions. [2022-07-22 22:21:13,852 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 233 transitions. Word has length 85 [2022-07-22 22:21:13,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:21:13,852 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 233 transitions. [2022-07-22 22:21:13,852 INFO L496 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) [2022-07-22 22:21:13,852 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 233 transitions. [2022-07-22 22:21:13,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-22 22:21:13,854 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:21:13,854 INFO L195 NwaCegarLoop]: 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] [2022-07-22 22:21:13,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 22:21:14,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-22 22:21:14,067 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:21:14,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:21:14,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1432579808, now seen corresponding path program 1 times [2022-07-22 22:21:14,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:21:14,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492495451] [2022-07-22 22:21:14,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:21:14,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:21:14,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:14,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 22:21:14,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:14,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 22:21:14,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:14,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 22:21:14,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:14,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-22 22:21:14,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:14,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-22 22:21:14,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:14,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-22 22:21:14,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:14,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-22 22:21:14,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:14,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-22 22:21:14,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:14,385 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-22 22:21:14,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:21:14,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492495451] [2022-07-22 22:21:14,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492495451] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:21:14,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:21:14,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-22 22:21:14,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313057743] [2022-07-22 22:21:14,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:21:14,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-22 22:21:14,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:21:14,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-22 22:21:14,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-07-22 22:21:14,387 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) [2022-07-22 22:21:14,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:21:14,676 INFO L93 Difference]: Finished difference Result 199 states and 241 transitions. [2022-07-22 22:21:14,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 22:21:14,676 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 [2022-07-22 22:21:14,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:21:14,677 INFO L225 Difference]: With dead ends: 199 [2022-07-22 22:21:14,677 INFO L226 Difference]: Without dead ends: 197 [2022-07-22 22:21:14,677 INFO L412 NwaCegarLoop]: 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 [2022-07-22 22:21:14,678 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 38 mSDsluCounter, 993 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 1103 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 22:21:14,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 1103 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 22:21:14,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-07-22 22:21:14,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2022-07-22 22:21:14,689 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) [2022-07-22 22:21:14,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 238 transitions. [2022-07-22 22:21:14,690 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 238 transitions. Word has length 87 [2022-07-22 22:21:14,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:21:14,691 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 238 transitions. [2022-07-22 22:21:14,691 INFO L496 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) [2022-07-22 22:21:14,691 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 238 transitions. [2022-07-22 22:21:14,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-22 22:21:14,692 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:21:14,692 INFO L195 NwaCegarLoop]: 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] [2022-07-22 22:21:14,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 22:21:14,693 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:21:14,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:21:14,693 INFO L85 PathProgramCache]: Analyzing trace with hash 904354819, now seen corresponding path program 1 times [2022-07-22 22:21:14,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:21:14,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150902216] [2022-07-22 22:21:14,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:21:14,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:21:14,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:15,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 22:21:15,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:15,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 22:21:15,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:15,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 22:21:15,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:15,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-22 22:21:15,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:15,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-22 22:21:15,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:15,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-22 22:21:15,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:15,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-22 22:21:15,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:15,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-07-22 22:21:15,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:15,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-22 22:21:15,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:15,290 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-22 22:21:15,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:21:15,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150902216] [2022-07-22 22:21:15,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150902216] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:21:15,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88865203] [2022-07-22 22:21:15,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:21:15,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:21:15,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:21:15,296 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 22:21:15,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 22:21:15,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:15,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 2589 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-22 22:21:15,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:21:16,321 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-07-22 22:21:16,328 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-07-22 22:21:16,332 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2022-07-22 22:21:16,369 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 22:21:16,369 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 22:21:16,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88865203] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:21:16,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 22:21:16,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [11] total 23 [2022-07-22 22:21:16,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961969885] [2022-07-22 22:21:16,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:21:16,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 22:21:16,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:21:16,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 22:21:16,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2022-07-22 22:21:16,372 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) [2022-07-22 22:21:17,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:21:17,520 INFO L93 Difference]: Finished difference Result 364 states and 473 transitions. [2022-07-22 22:21:17,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-22 22:21:17,520 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 [2022-07-22 22:21:17,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:21:17,522 INFO L225 Difference]: With dead ends: 364 [2022-07-22 22:21:17,522 INFO L226 Difference]: Without dead ends: 245 [2022-07-22 22:21:17,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=196, Invalid=796, Unknown=0, NotChecked=0, Total=992 [2022-07-22 22:21:17,523 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 192 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 22:21:17,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 488 Invalid, 978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 812 Invalid, 0 Unknown, 123 Unchecked, 0.7s Time] [2022-07-22 22:21:17,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-07-22 22:21:17,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 214. [2022-07-22 22:21:17,538 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) [2022-07-22 22:21:17,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 264 transitions. [2022-07-22 22:21:17,539 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 264 transitions. Word has length 91 [2022-07-22 22:21:17,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:21:17,540 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 264 transitions. [2022-07-22 22:21:17,540 INFO L496 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) [2022-07-22 22:21:17,540 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 264 transitions. [2022-07-22 22:21:17,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-22 22:21:17,541 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:21:17,542 INFO L195 NwaCegarLoop]: 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] [2022-07-22 22:21:17,570 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-22 22:21:17,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-22 22:21:17,763 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:21:17,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:21:17,764 INFO L85 PathProgramCache]: Analyzing trace with hash -62995835, now seen corresponding path program 1 times [2022-07-22 22:21:17,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:21:17,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342749930] [2022-07-22 22:21:17,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:21:17,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:21:17,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:17,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 22:21:17,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:17,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 22:21:17,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:17,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 22:21:17,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:17,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-22 22:21:17,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:17,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-22 22:21:17,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:17,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-22 22:21:17,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:17,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-22 22:21:17,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:17,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-07-22 22:21:17,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:17,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-22 22:21:17,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:17,921 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-22 22:21:17,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:21:17,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342749930] [2022-07-22 22:21:17,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342749930] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:21:17,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169938584] [2022-07-22 22:21:17,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:21:17,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:21:17,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:21:17,923 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 22:21:17,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 22:21:18,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:18,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 2584 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 22:21:18,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:21:18,317 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-22 22:21:18,318 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 22:21:18,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169938584] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:21:18,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 22:21:18,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2022-07-22 22:21:18,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281114351] [2022-07-22 22:21:18,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:21:18,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 22:21:18,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:21:18,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 22:21:18,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 22:21:18,320 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) [2022-07-22 22:21:18,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:21:18,354 INFO L93 Difference]: Finished difference Result 343 states and 433 transitions. [2022-07-22 22:21:18,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 22:21:18,354 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 [2022-07-22 22:21:18,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:21:18,356 INFO L225 Difference]: With dead ends: 343 [2022-07-22 22:21:18,356 INFO L226 Difference]: Without dead ends: 205 [2022-07-22 22:21:18,357 INFO L412 NwaCegarLoop]: 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 [2022-07-22 22:21:18,357 INFO L413 NwaCegarLoop]: 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 [2022-07-22 22:21:18,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 316 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 22:21:18,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-07-22 22:21:18,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 202. [2022-07-22 22:21:18,371 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) [2022-07-22 22:21:18,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 241 transitions. [2022-07-22 22:21:18,373 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 241 transitions. Word has length 91 [2022-07-22 22:21:18,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:21:18,373 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 241 transitions. [2022-07-22 22:21:18,374 INFO L496 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) [2022-07-22 22:21:18,374 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 241 transitions. [2022-07-22 22:21:18,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-07-22 22:21:18,375 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:21:18,375 INFO L195 NwaCegarLoop]: 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] [2022-07-22 22:21:18,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-22 22:21:18,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-22 22:21:18,599 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:21:18,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:21:18,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1386307521, now seen corresponding path program 1 times [2022-07-22 22:21:18,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:21:18,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545592301] [2022-07-22 22:21:18,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:21:18,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:21:18,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:18,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 22:21:18,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:18,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 22:21:18,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:18,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 22:21:18,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:18,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 22:21:18,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:18,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-22 22:21:18,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:18,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 22:21:18,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:18,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 22:21:18,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:18,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 22:21:18,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:18,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 22:21:18,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:18,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-22 22:21:18,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:18,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-22 22:21:18,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:18,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-22 22:21:18,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:18,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-22 22:21:18,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:18,872 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-22 22:21:18,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:21:18,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545592301] [2022-07-22 22:21:18,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545592301] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:21:18,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:21:18,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-22 22:21:18,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849345834] [2022-07-22 22:21:18,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:21:18,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 22:21:18,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:21:18,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 22:21:18,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-22 22:21:18,875 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) [2022-07-22 22:21:19,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:21:19,316 INFO L93 Difference]: Finished difference Result 210 states and 249 transitions. [2022-07-22 22:21:19,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 22:21:19,316 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 [2022-07-22 22:21:19,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:21:19,318 INFO L225 Difference]: With dead ends: 210 [2022-07-22 22:21:19,318 INFO L226 Difference]: Without dead ends: 208 [2022-07-22 22:21:19,319 INFO L412 NwaCegarLoop]: 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 [2022-07-22 22:21:19,319 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 51 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 22:21:19,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 420 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 22:21:19,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-07-22 22:21:19,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2022-07-22 22:21:19,334 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) [2022-07-22 22:21:19,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 246 transitions. [2022-07-22 22:21:19,335 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 246 transitions. Word has length 100 [2022-07-22 22:21:19,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:21:19,335 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 246 transitions. [2022-07-22 22:21:19,336 INFO L496 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) [2022-07-22 22:21:19,336 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 246 transitions. [2022-07-22 22:21:19,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-07-22 22:21:19,337 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:21:19,337 INFO L195 NwaCegarLoop]: 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] [2022-07-22 22:21:19,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-22 22:21:19,338 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:21:19,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:21:19,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1718798494, now seen corresponding path program 1 times [2022-07-22 22:21:19,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:21:19,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643324230] [2022-07-22 22:21:19,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:21:19,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:21:19,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:19,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 22:21:19,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:19,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 22:21:19,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:19,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 22:21:19,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:19,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-22 22:21:19,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:19,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-22 22:21:19,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:19,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 22:21:19,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:19,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-07-22 22:21:19,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:19,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-22 22:21:19,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:19,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-22 22:21:19,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:19,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-07-22 22:21:19,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:19,909 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-07-22 22:21:19,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:21:19,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643324230] [2022-07-22 22:21:19,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643324230] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:21:19,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99799238] [2022-07-22 22:21:19,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:21:19,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:21:19,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:21:19,911 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 22:21:19,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 22:21:20,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:20,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 2634 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-22 22:21:20,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:21:20,327 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-22 22:21:20,331 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-22 22:21:20,465 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-22 22:21:20,467 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-22 22:21:20,482 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-22 22:21:20,482 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 22:21:20,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99799238] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:21:20,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 22:21:20,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 13 [2022-07-22 22:21:20,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63199247] [2022-07-22 22:21:20,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:21:20,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 22:21:20,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:21:20,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 22:21:20,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-07-22 22:21:20,484 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) [2022-07-22 22:21:20,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:21:20,672 INFO L93 Difference]: Finished difference Result 392 states and 476 transitions. [2022-07-22 22:21:20,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 22:21:20,673 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 [2022-07-22 22:21:20,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:21:20,677 INFO L225 Difference]: With dead ends: 392 [2022-07-22 22:21:20,677 INFO L226 Difference]: Without dead ends: 236 [2022-07-22 22:21:20,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 113 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-07-22 22:21:20,678 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 36 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 22:21:20,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 666 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 118 Invalid, 0 Unknown, 27 Unchecked, 0.1s Time] [2022-07-22 22:21:20,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-07-22 22:21:20,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 222. [2022-07-22 22:21:20,695 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) [2022-07-22 22:21:20,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 261 transitions. [2022-07-22 22:21:20,698 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 261 transitions. Word has length 98 [2022-07-22 22:21:20,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:21:20,699 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 261 transitions. [2022-07-22 22:21:20,699 INFO L496 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) [2022-07-22 22:21:20,699 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 261 transitions. [2022-07-22 22:21:20,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-22 22:21:20,700 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:21:20,701 INFO L195 NwaCegarLoop]: 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] [2022-07-22 22:21:20,731 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-22 22:21:20,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-22 22:21:20,923 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:21:20,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:21:20,924 INFO L85 PathProgramCache]: Analyzing trace with hash 2111461513, now seen corresponding path program 1 times [2022-07-22 22:21:20,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:21:20,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761110716] [2022-07-22 22:21:20,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:21:20,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:21:21,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:21,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 22:21:21,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:21,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 22:21:21,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:21,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 22:21:21,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:21,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 22:21:21,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:21,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-22 22:21:21,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:21,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 22:21:21,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:21,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 22:21:21,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:21,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 22:21:21,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:21,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 22:21:21,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:21,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-22 22:21:21,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:21,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-22 22:21:21,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:21,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-22 22:21:21,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:21,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-22 22:21:21,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:21,475 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 22 proven. 23 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-07-22 22:21:21,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:21:21,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761110716] [2022-07-22 22:21:21,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761110716] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:21:21,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400202152] [2022-07-22 22:21:21,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:21:21,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:21:21,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:21:21,477 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 22:21:21,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-22 22:21:21,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:21,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 2600 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-22 22:21:21,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:21:22,363 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 32 proven. 30 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-22 22:21:22,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:21:22,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400202152] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:21:22,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 22:21:22,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2022-07-22 22:21:22,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951448482] [2022-07-22 22:21:22,622 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 22:21:22,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-22 22:21:22,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:21:22,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-22 22:21:22,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2022-07-22 22:21:22,626 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) [2022-07-22 22:21:23,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:21:23,998 INFO L93 Difference]: Finished difference Result 353 states and 455 transitions. [2022-07-22 22:21:23,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-22 22:21:23,998 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 [2022-07-22 22:21:23,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:21:24,000 INFO L225 Difference]: With dead ends: 353 [2022-07-22 22:21:24,000 INFO L226 Difference]: Without dead ends: 284 [2022-07-22 22:21:24,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 142 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=286, Invalid=1875, Unknown=1, NotChecked=0, Total=2162 [2022-07-22 22:21:24,001 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 154 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 1726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 643 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 22:21:24,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 376 Invalid, 1726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 949 Invalid, 0 Unknown, 643 Unchecked, 0.8s Time] [2022-07-22 22:21:24,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-07-22 22:21:24,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 250. [2022-07-22 22:21:24,022 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) [2022-07-22 22:21:24,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 317 transitions. [2022-07-22 22:21:24,024 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 317 transitions. Word has length 104 [2022-07-22 22:21:24,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:21:24,024 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 317 transitions. [2022-07-22 22:21:24,025 INFO L496 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) [2022-07-22 22:21:24,025 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 317 transitions. [2022-07-22 22:21:24,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-22 22:21:24,026 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:21:24,026 INFO L195 NwaCegarLoop]: 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] [2022-07-22 22:21:24,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-22 22:21:24,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:21:24,252 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:21:24,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:21:24,252 INFO L85 PathProgramCache]: Analyzing trace with hash -643190832, now seen corresponding path program 1 times [2022-07-22 22:21:24,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:21:24,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406166093] [2022-07-22 22:21:24,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:21:24,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:21:24,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:24,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 22:21:24,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:24,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 22:21:24,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:24,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 22:21:24,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:24,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 22:21:24,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:24,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-22 22:21:24,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:24,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 22:21:24,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:24,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 22:21:24,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:24,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 22:21:24,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:24,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 22:21:24,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:24,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-22 22:21:24,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:24,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-22 22:21:24,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:24,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-22 22:21:24,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:24,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-22 22:21:24,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:24,564 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-22 22:21:24,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:21:24,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406166093] [2022-07-22 22:21:24,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406166093] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:21:24,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:21:24,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-22 22:21:24,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124068864] [2022-07-22 22:21:24,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:21:24,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 22:21:24,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:21:24,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 22:21:24,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-07-22 22:21:24,566 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) [2022-07-22 22:21:25,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:21:25,324 INFO L93 Difference]: Finished difference Result 258 states and 325 transitions. [2022-07-22 22:21:25,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 22:21:25,325 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 [2022-07-22 22:21:25,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:21:25,326 INFO L225 Difference]: With dead ends: 258 [2022-07-22 22:21:25,327 INFO L226 Difference]: Without dead ends: 256 [2022-07-22 22:21:25,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2022-07-22 22:21:25,328 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 73 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 22:21:25,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 604 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 22:21:25,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-07-22 22:21:25,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 250. [2022-07-22 22:21:25,347 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) [2022-07-22 22:21:25,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 317 transitions. [2022-07-22 22:21:25,349 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 317 transitions. Word has length 106 [2022-07-22 22:21:25,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:21:25,349 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 317 transitions. [2022-07-22 22:21:25,350 INFO L496 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) [2022-07-22 22:21:25,350 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 317 transitions. [2022-07-22 22:21:25,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-22 22:21:25,351 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:21:25,351 INFO L195 NwaCegarLoop]: 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] [2022-07-22 22:21:25,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-22 22:21:25,352 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:21:25,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:21:25,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1690843138, now seen corresponding path program 1 times [2022-07-22 22:21:25,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:21:25,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352710945] [2022-07-22 22:21:25,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:21:25,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:21:25,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:25,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 22:21:25,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:25,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 22:21:25,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:25,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-22 22:21:25,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:25,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 22:21:25,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:25,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 22:21:25,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:25,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-22 22:21:25,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:25,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-22 22:21:25,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:25,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-22 22:21:25,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:25,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-07-22 22:21:25,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:25,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-22 22:21:25,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:25,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-07-22 22:21:25,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:25,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-07-22 22:21:25,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:26,056 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-22 22:21:26,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:21:26,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352710945] [2022-07-22 22:21:26,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352710945] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:21:26,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:21:26,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-07-22 22:21:26,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753638844] [2022-07-22 22:21:26,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:21:26,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 22:21:26,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:21:26,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 22:21:26,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-07-22 22:21:26,058 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) [2022-07-22 22:21:27,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:21:27,074 INFO L93 Difference]: Finished difference Result 371 states and 482 transitions. [2022-07-22 22:21:27,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-22 22:21:27,075 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 [2022-07-22 22:21:27,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:21:27,077 INFO L225 Difference]: With dead ends: 371 [2022-07-22 22:21:27,077 INFO L226 Difference]: Without dead ends: 293 [2022-07-22 22:21:27,078 INFO L412 NwaCegarLoop]: 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 [2022-07-22 22:21:27,078 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 110 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 1482 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 1552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 22:21:27,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 571 Invalid, 1552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1482 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-22 22:21:27,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-07-22 22:21:27,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 256. [2022-07-22 22:21:27,099 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) [2022-07-22 22:21:27,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 326 transitions. [2022-07-22 22:21:27,101 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 326 transitions. Word has length 109 [2022-07-22 22:21:27,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:21:27,101 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 326 transitions. [2022-07-22 22:21:27,102 INFO L496 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) [2022-07-22 22:21:27,102 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 326 transitions. [2022-07-22 22:21:27,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-22 22:21:27,103 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:21:27,104 INFO L195 NwaCegarLoop]: 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] [2022-07-22 22:21:27,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-22 22:21:27,104 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:21:27,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:21:27,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1949008576, now seen corresponding path program 1 times [2022-07-22 22:21:27,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:21:27,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610848844] [2022-07-22 22:21:27,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:21:27,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:21:27,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:27,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 22:21:27,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:27,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 22:21:27,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:27,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-22 22:21:27,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:27,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 22:21:27,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:27,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 22:21:27,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:27,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-22 22:21:27,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:27,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-22 22:21:27,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:27,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-22 22:21:27,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:27,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-07-22 22:21:27,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:27,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-22 22:21:27,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:27,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-07-22 22:21:27,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:27,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-07-22 22:21:27,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:27,320 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-07-22 22:21:27,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:21:27,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610848844] [2022-07-22 22:21:27,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610848844] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:21:27,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:21:27,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 22:21:27,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598315315] [2022-07-22 22:21:27,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:21:27,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 22:21:27,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:21:27,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 22:21:27,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 22:21:27,323 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) [2022-07-22 22:21:27,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:21:27,543 INFO L93 Difference]: Finished difference Result 337 states and 437 transitions. [2022-07-22 22:21:27,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 22:21:27,544 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 [2022-07-22 22:21:27,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:21:27,546 INFO L225 Difference]: With dead ends: 337 [2022-07-22 22:21:27,546 INFO L226 Difference]: Without dead ends: 248 [2022-07-22 22:21:27,547 INFO L412 NwaCegarLoop]: 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 [2022-07-22 22:21:27,547 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 44 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 22:21:27,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 218 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 22:21:27,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-07-22 22:21:27,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 248. [2022-07-22 22:21:27,571 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) [2022-07-22 22:21:27,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 308 transitions. [2022-07-22 22:21:27,573 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 308 transitions. Word has length 109 [2022-07-22 22:21:27,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:21:27,573 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 308 transitions. [2022-07-22 22:21:27,573 INFO L496 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) [2022-07-22 22:21:27,573 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 308 transitions. [2022-07-22 22:21:27,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-22 22:21:27,575 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:21:27,575 INFO L195 NwaCegarLoop]: 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] [2022-07-22 22:21:27,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-22 22:21:27,576 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:21:27,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:21:27,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1466498319, now seen corresponding path program 1 times [2022-07-22 22:21:27,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:21:27,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709135872] [2022-07-22 22:21:27,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:21:27,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:21:27,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:27,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 22:21:27,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:27,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 22:21:27,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:27,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 22:21:27,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:27,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 22:21:27,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:27,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-22 22:21:27,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:27,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 22:21:27,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:27,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 22:21:27,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:27,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 22:21:27,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:27,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 22:21:27,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:27,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-22 22:21:27,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:27,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-22 22:21:27,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:27,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-22 22:21:27,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:27,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-22 22:21:27,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:27,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-22 22:21:27,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:27,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-07-22 22:21:27,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:27,778 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-07-22 22:21:27,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:21:27,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709135872] [2022-07-22 22:21:27,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709135872] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:21:27,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:21:27,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 22:21:27,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238256372] [2022-07-22 22:21:27,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:21:27,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 22:21:27,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:21:27,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 22:21:27,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 22:21:27,781 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) [2022-07-22 22:21:28,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:21:28,005 INFO L93 Difference]: Finished difference Result 261 states and 321 transitions. [2022-07-22 22:21:28,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 22:21:28,006 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 [2022-07-22 22:21:28,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:21:28,007 INFO L225 Difference]: With dead ends: 261 [2022-07-22 22:21:28,007 INFO L226 Difference]: Without dead ends: 245 [2022-07-22 22:21:28,008 INFO L412 NwaCegarLoop]: 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 [2022-07-22 22:21:28,008 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 50 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 22:21:28,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 247 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 22:21:28,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-07-22 22:21:28,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2022-07-22 22:21:28,028 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) [2022-07-22 22:21:28,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 304 transitions. [2022-07-22 22:21:28,029 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 304 transitions. Word has length 112 [2022-07-22 22:21:28,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:21:28,030 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 304 transitions. [2022-07-22 22:21:28,030 INFO L496 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) [2022-07-22 22:21:28,030 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 304 transitions. [2022-07-22 22:21:28,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-07-22 22:21:28,031 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:21:28,032 INFO L195 NwaCegarLoop]: 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] [2022-07-22 22:21:28,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-22 22:21:28,032 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:21:28,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:21:28,032 INFO L85 PathProgramCache]: Analyzing trace with hash 964794292, now seen corresponding path program 1 times [2022-07-22 22:21:28,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:21:28,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542507382] [2022-07-22 22:21:28,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:21:28,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:21:28,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:28,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 22:21:28,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:28,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 22:21:28,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:28,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 22:21:28,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:28,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 22:21:28,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:28,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-22 22:21:28,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:28,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 22:21:28,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:28,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 22:21:28,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:28,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 22:21:28,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:28,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 22:21:28,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:28,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-22 22:21:28,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:28,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-22 22:21:28,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:28,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-22 22:21:28,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:28,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-22 22:21:28,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:28,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-22 22:21:28,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:28,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-07-22 22:21:28,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:28,250 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-07-22 22:21:28,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:21:28,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542507382] [2022-07-22 22:21:28,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542507382] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:21:28,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:21:28,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-22 22:21:28,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819590223] [2022-07-22 22:21:28,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:21:28,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 22:21:28,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:21:28,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 22:21:28,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-22 22:21:28,252 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) [2022-07-22 22:21:28,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:21:28,620 INFO L93 Difference]: Finished difference Result 253 states and 312 transitions. [2022-07-22 22:21:28,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 22:21:28,621 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 [2022-07-22 22:21:28,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:21:28,622 INFO L225 Difference]: With dead ends: 253 [2022-07-22 22:21:28,622 INFO L226 Difference]: Without dead ends: 251 [2022-07-22 22:21:28,623 INFO L412 NwaCegarLoop]: 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 [2022-07-22 22:21:28,623 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 49 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 22:21:28,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 415 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 22:21:28,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-07-22 22:21:28,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 250. [2022-07-22 22:21:28,643 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) [2022-07-22 22:21:28,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 309 transitions. [2022-07-22 22:21:28,644 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 309 transitions. Word has length 114 [2022-07-22 22:21:28,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:21:28,645 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 309 transitions. [2022-07-22 22:21:28,645 INFO L496 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) [2022-07-22 22:21:28,645 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 309 transitions. [2022-07-22 22:21:28,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-22 22:21:28,646 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:21:28,646 INFO L195 NwaCegarLoop]: 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] [2022-07-22 22:21:28,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-22 22:21:28,647 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:21:28,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:21:28,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1411369220, now seen corresponding path program 1 times [2022-07-22 22:21:28,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:21:28,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730781553] [2022-07-22 22:21:28,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:21:28,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:21:28,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:29,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 22:21:29,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:29,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 22:21:29,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:29,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-22 22:21:29,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:29,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 22:21:29,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:29,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 22:21:29,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:29,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-22 22:21:29,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:29,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-22 22:21:29,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:29,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-22 22:21:29,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:29,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-07-22 22:21:29,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:29,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-22 22:21:29,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:29,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-07-22 22:21:29,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:29,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-22 22:21:29,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:29,375 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-07-22 22:21:29,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:21:29,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730781553] [2022-07-22 22:21:29,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730781553] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:21:29,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299425059] [2022-07-22 22:21:29,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:21:29,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:21:29,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:21:29,380 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 22:21:29,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-22 22:21:29,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:21:29,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 2692 conjuncts, 81 conjunts are in the unsatisfiable core [2022-07-22 22:21:29,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:21:29,797 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 22:21:29,920 INFO L356 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2022-07-22 22:21:29,921 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2022-07-22 22:21:29,978 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-22 22:21:30,242 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-22 22:21:30,242 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-22 22:21:30,274 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-22 22:21:38,578 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-22 22:22:09,734 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-22 22:22:09,744 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-22 22:22:09,744 INFO L390 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 23 treesize of output 27 [2022-07-22 22:22:09,750 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-22 22:22:14,425 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 20 proven. 66 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 22:22:14,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:22:14,909 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-22 22:22:14,931 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((|aws_byte_cursor_right_trim_pred_~#trimmed~0.base| Int) (v_ArrVal_792 (Array Int Int))) (or (not (= (select (select (store |c_#memory_$Pointer$.base| |aws_byte_cursor_right_trim_pred_~#trimmed~0.base| v_ArrVal_792) c_aws_byte_cursor_right_trim_pred_~source.base) (+ c_aws_byte_cursor_right_trim_pred_~source.offset 8)) 0)) (= |aws_byte_cursor_right_trim_pred_~#trimmed~0.base| c_aws_byte_cursor_right_trim_pred_~source.base))) (or (= |c_aws_byte_cursor_right_trim_pred_~#trimmed~0.offset| c_aws_byte_cursor_right_trim_pred_~source.offset) (forall ((|aws_byte_cursor_right_trim_pred_~#trimmed~0.base| Int) (v_ArrVal_792 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| |aws_byte_cursor_right_trim_pred_~#trimmed~0.base| v_ArrVal_792) c_aws_byte_cursor_right_trim_pred_~source.base) (+ c_aws_byte_cursor_right_trim_pred_~source.offset 8)) 0))))) is different from false [2022-07-22 22:22:14,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299425059] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:22:14,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 22:22:14,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 27] total 40 [2022-07-22 22:22:14,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613669777] [2022-07-22 22:22:14,948 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 22:22:14,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-22 22:22:14,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:22:14,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-22 22:22:14,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=2140, Unknown=6, NotChecked=94, Total=2450 [2022-07-22 22:22:14,949 INFO L87 Difference]: Start difference. First operand 250 states and 309 transitions. Second operand has 40 states, 40 states have (on average 3.15) internal successors, (126), 34 states have internal predecessors, (126), 15 states have call successors, (26), 10 states have call predecessors, (26), 7 states have return successors, (23), 14 states have call predecessors, (23), 12 states have call successors, (23) [2022-07-22 22:22:20,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:22:20,008 INFO L93 Difference]: Finished difference Result 412 states and 506 transitions. [2022-07-22 22:22:20,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-22 22:22:20,008 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.15) internal successors, (126), 34 states have internal predecessors, (126), 15 states have call successors, (26), 10 states have call predecessors, (26), 7 states have return successors, (23), 14 states have call predecessors, (23), 12 states have call successors, (23) Word has length 112 [2022-07-22 22:22:20,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:22:20,010 INFO L225 Difference]: With dead ends: 412 [2022-07-22 22:22:20,010 INFO L226 Difference]: Without dead ends: 345 [2022-07-22 22:22:20,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 117 SyntacticMatches, 18 SemanticMatches, 72 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1796 ImplicationChecksByTransitivity, 48.9s TimeCoverageRelationStatistics Valid=423, Invalid=4830, Unknown=7, NotChecked=142, Total=5402 [2022-07-22 22:22:20,013 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 105 mSDsluCounter, 844 mSDsCounter, 0 mSdLazyCounter, 1098 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 953 SdHoareTripleChecker+Invalid, 2054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 892 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 22:22:20,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 953 Invalid, 2054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1098 Invalid, 0 Unknown, 892 Unchecked, 0.7s Time] [2022-07-22 22:22:20,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-07-22 22:22:20,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 288. [2022-07-22 22:22:20,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 200 states have (on average 1.085) internal successors, (217), 205 states have internal predecessors, (217), 56 states have call successors, (56), 30 states have call predecessors, (56), 31 states have return successors, (75), 52 states have call predecessors, (75), 54 states have call successors, (75) [2022-07-22 22:22:20,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 348 transitions. [2022-07-22 22:22:20,037 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 348 transitions. Word has length 112 [2022-07-22 22:22:20,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:22:20,037 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 348 transitions. [2022-07-22 22:22:20,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.15) internal successors, (126), 34 states have internal predecessors, (126), 15 states have call successors, (26), 10 states have call predecessors, (26), 7 states have return successors, (23), 14 states have call predecessors, (23), 12 states have call successors, (23) [2022-07-22 22:22:20,038 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 348 transitions. [2022-07-22 22:22:20,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-07-22 22:22:20,039 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:22:20,039 INFO L195 NwaCegarLoop]: 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] [2022-07-22 22:22:20,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-07-22 22:22:20,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-07-22 22:22:20,255 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:22:20,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:22:20,256 INFO L85 PathProgramCache]: Analyzing trace with hash 415964924, now seen corresponding path program 1 times [2022-07-22 22:22:20,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:22:20,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577982954] [2022-07-22 22:22:20,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:22:20,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:22:20,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:20,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 22:22:20,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:20,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 22:22:20,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:20,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 22:22:20,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:20,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 22:22:20,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:20,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-22 22:22:20,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:20,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 22:22:20,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:20,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 22:22:20,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:20,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 22:22:20,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:20,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 22:22:20,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:20,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-22 22:22:20,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:20,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-22 22:22:20,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:20,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-22 22:22:20,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:20,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-22 22:22:20,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:20,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-22 22:22:20,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:20,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-07-22 22:22:20,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:20,679 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 30 proven. 29 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-07-22 22:22:20,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:22:20,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577982954] [2022-07-22 22:22:20,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577982954] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:22:20,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963851745] [2022-07-22 22:22:20,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:22:20,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:22:20,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:22:20,681 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 22:22:20,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-22 22:22:21,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:21,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 2632 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-22 22:22:21,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:22:22,680 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 70 proven. 36 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-07-22 22:22:22,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:22:23,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963851745] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:22:23,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 22:22:23,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 30 [2022-07-22 22:22:23,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844503520] [2022-07-22 22:22:23,065 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 22:22:23,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-22 22:22:23,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:22:23,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-22 22:22:23,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1008, Unknown=1, NotChecked=0, Total=1122 [2022-07-22 22:22:23,067 INFO L87 Difference]: Start difference. First operand 288 states and 348 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) [2022-07-22 22:22:24,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:22:24,600 INFO L93 Difference]: Finished difference Result 439 states and 539 transitions. [2022-07-22 22:22:24,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-22 22:22:24,601 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 [2022-07-22 22:22:24,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:22:24,603 INFO L225 Difference]: With dead ends: 439 [2022-07-22 22:22:24,603 INFO L226 Difference]: Without dead ends: 356 [2022-07-22 22:22:24,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 151 SyntacticMatches, 13 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=280, Invalid=2577, Unknown=5, NotChecked=0, Total=2862 [2022-07-22 22:22:24,605 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 211 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 1431 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 2245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 661 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-22 22:22:24,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 626 Invalid, 2245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1431 Invalid, 0 Unknown, 661 Unchecked, 0.9s Time] [2022-07-22 22:22:24,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-07-22 22:22:24,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 311. [2022-07-22 22:22:24,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 217 states have (on average 1.0829493087557605) internal successors, (235), 223 states have internal predecessors, (235), 59 states have call successors, (59), 31 states have call predecessors, (59), 34 states have return successors, (78), 56 states have call predecessors, (78), 57 states have call successors, (78) [2022-07-22 22:22:24,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 372 transitions. [2022-07-22 22:22:24,634 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 372 transitions. Word has length 118 [2022-07-22 22:22:24,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:22:24,634 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 372 transitions. [2022-07-22 22:22:24,634 INFO L496 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) [2022-07-22 22:22:24,634 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 372 transitions. [2022-07-22 22:22:24,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-22 22:22:24,636 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:22:24,636 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:22:24,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-22 22:22:24,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:22:24,847 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:22:24,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:22:24,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1588558461, now seen corresponding path program 1 times [2022-07-22 22:22:24,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:22:24,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320844834] [2022-07-22 22:22:24,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:22:24,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:22:24,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:24,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 22:22:24,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:24,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 22:22:24,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:24,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 22:22:24,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:24,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 22:22:24,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:24,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-22 22:22:25,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:25,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 22:22:25,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:25,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 22:22:25,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:25,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 22:22:25,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:25,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 22:22:25,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:25,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-22 22:22:25,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:25,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-22 22:22:25,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:25,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-22 22:22:25,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:25,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-22 22:22:25,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:25,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-22 22:22:25,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:25,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-07-22 22:22:25,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:25,148 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-07-22 22:22:25,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:22:25,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320844834] [2022-07-22 22:22:25,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320844834] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:22:25,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:22:25,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-22 22:22:25,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950934952] [2022-07-22 22:22:25,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:22:25,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 22:22:25,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:22:25,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 22:22:25,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-07-22 22:22:25,150 INFO L87 Difference]: Start difference. First operand 311 states and 372 transitions. Second operand has 14 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 11 states have internal predecessors, (48), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2022-07-22 22:22:25,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:22:25,794 INFO L93 Difference]: Finished difference Result 319 states and 380 transitions. [2022-07-22 22:22:25,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 22:22:25,794 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 11 states have internal predecessors, (48), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 120 [2022-07-22 22:22:25,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:22:25,796 INFO L225 Difference]: With dead ends: 319 [2022-07-22 22:22:25,796 INFO L226 Difference]: Without dead ends: 317 [2022-07-22 22:22:25,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2022-07-22 22:22:25,797 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 70 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 22:22:25,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 601 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 22:22:25,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-07-22 22:22:25,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 311. [2022-07-22 22:22:25,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 217 states have (on average 1.0829493087557605) internal successors, (235), 223 states have internal predecessors, (235), 59 states have call successors, (59), 31 states have call predecessors, (59), 34 states have return successors, (78), 56 states have call predecessors, (78), 57 states have call successors, (78) [2022-07-22 22:22:25,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 372 transitions. [2022-07-22 22:22:25,824 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 372 transitions. Word has length 120 [2022-07-22 22:22:25,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:22:25,824 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 372 transitions. [2022-07-22 22:22:25,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 11 states have internal predecessors, (48), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2022-07-22 22:22:25,824 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 372 transitions. [2022-07-22 22:22:25,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-22 22:22:25,826 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:22:25,826 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:22:25,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-22 22:22:25,826 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:22:25,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:22:25,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1324049691, now seen corresponding path program 1 times [2022-07-22 22:22:25,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:22:25,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358323795] [2022-07-22 22:22:25,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:22:25,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:22:25,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:26,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 22:22:26,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:26,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 22:22:26,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:26,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 22:22:26,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:26,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 22:22:26,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:26,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-22 22:22:26,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:26,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 22:22:26,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:26,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 22:22:26,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:26,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 22:22:26,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:26,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 22:22:26,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:26,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-22 22:22:26,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:26,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-22 22:22:26,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:26,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-22 22:22:26,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:26,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-22 22:22:26,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:26,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-22 22:22:26,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:26,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-07-22 22:22:26,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:26,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-07-22 22:22:26,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:26,331 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-07-22 22:22:26,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:22:26,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358323795] [2022-07-22 22:22:26,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358323795] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:22:26,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:22:26,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-22 22:22:26,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63944587] [2022-07-22 22:22:26,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:22:26,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 22:22:26,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:22:26,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 22:22:26,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-07-22 22:22:26,333 INFO L87 Difference]: Start difference. First operand 311 states and 372 transitions. Second operand has 14 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 7 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2022-07-22 22:22:27,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:22:27,282 INFO L93 Difference]: Finished difference Result 342 states and 416 transitions. [2022-07-22 22:22:27,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-22 22:22:27,282 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 7 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 124 [2022-07-22 22:22:27,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:22:27,284 INFO L225 Difference]: With dead ends: 342 [2022-07-22 22:22:27,284 INFO L226 Difference]: Without dead ends: 231 [2022-07-22 22:22:27,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2022-07-22 22:22:27,285 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 71 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 22:22:27,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 328 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 22:22:27,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-07-22 22:22:27,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 226. [2022-07-22 22:22:27,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 151 states have (on average 1.0927152317880795) internal successors, (165), 154 states have internal predecessors, (165), 51 states have call successors, (51), 21 states have call predecessors, (51), 23 states have return successors, (68), 50 states have call predecessors, (68), 48 states have call successors, (68) [2022-07-22 22:22:27,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 284 transitions. [2022-07-22 22:22:27,305 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 284 transitions. Word has length 124 [2022-07-22 22:22:27,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:22:27,305 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 284 transitions. [2022-07-22 22:22:27,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 7 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2022-07-22 22:22:27,306 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 284 transitions. [2022-07-22 22:22:27,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-07-22 22:22:27,307 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:22:27,307 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:22:27,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-22 22:22:27,307 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:22:27,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:22:27,308 INFO L85 PathProgramCache]: Analyzing trace with hash 73196301, now seen corresponding path program 1 times [2022-07-22 22:22:27,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:22:27,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144252867] [2022-07-22 22:22:27,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:22:27,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:22:27,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:27,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 22:22:27,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:27,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 22:22:27,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:27,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-22 22:22:27,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:28,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 22:22:28,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:28,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 22:22:28,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:28,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-22 22:22:28,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:28,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-22 22:22:28,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:28,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-22 22:22:28,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:28,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-07-22 22:22:28,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:28,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-22 22:22:28,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:28,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-07-22 22:22:28,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:28,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-07-22 22:22:28,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:28,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-07-22 22:22:28,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:28,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-07-22 22:22:28,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:28,204 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-22 22:22:28,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:22:28,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144252867] [2022-07-22 22:22:28,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144252867] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:22:28,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:22:28,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-22 22:22:28,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008332702] [2022-07-22 22:22:28,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:22:28,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-22 22:22:28,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:22:28,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-22 22:22:28,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2022-07-22 22:22:28,206 INFO L87 Difference]: Start difference. First operand 226 states and 284 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 17 states have internal predecessors, (60), 10 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (14), 10 states have call predecessors, (14), 8 states have call successors, (14) [2022-07-22 22:22:29,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:22:29,013 INFO L93 Difference]: Finished difference Result 297 states and 369 transitions. [2022-07-22 22:22:29,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-22 22:22:29,014 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 17 states have internal predecessors, (60), 10 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (14), 10 states have call predecessors, (14), 8 states have call successors, (14) Word has length 129 [2022-07-22 22:22:29,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:22:29,015 INFO L225 Difference]: With dead ends: 297 [2022-07-22 22:22:29,016 INFO L226 Difference]: Without dead ends: 225 [2022-07-22 22:22:29,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2022-07-22 22:22:29,017 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 114 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 22:22:29,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 231 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 915 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 22:22:29,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-07-22 22:22:29,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 219. [2022-07-22 22:22:29,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 148 states have (on average 1.0945945945945945) internal successors, (162), 151 states have internal predecessors, (162), 48 states have call successors, (48), 21 states have call predecessors, (48), 22 states have return successors, (59), 46 states have call predecessors, (59), 45 states have call successors, (59) [2022-07-22 22:22:29,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 269 transitions. [2022-07-22 22:22:29,048 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 269 transitions. Word has length 129 [2022-07-22 22:22:29,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:22:29,048 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 269 transitions. [2022-07-22 22:22:29,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 17 states have internal predecessors, (60), 10 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (14), 10 states have call predecessors, (14), 8 states have call successors, (14) [2022-07-22 22:22:29,048 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 269 transitions. [2022-07-22 22:22:29,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-07-22 22:22:29,049 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:22:29,050 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:22:29,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-22 22:22:29,050 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:22:29,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:22:29,050 INFO L85 PathProgramCache]: Analyzing trace with hash 212748628, now seen corresponding path program 1 times [2022-07-22 22:22:29,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:22:29,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669501228] [2022-07-22 22:22:29,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:22:29,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:22:29,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:29,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 22:22:29,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:29,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 22:22:29,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:29,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-22 22:22:29,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:29,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 22:22:29,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:29,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 22:22:29,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:29,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-22 22:22:29,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:29,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-22 22:22:29,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:29,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-22 22:22:29,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:29,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-07-22 22:22:29,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:29,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-22 22:22:29,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:29,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-07-22 22:22:29,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:29,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-07-22 22:22:29,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:29,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-07-22 22:22:29,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:29,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-07-22 22:22:29,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:29,345 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-07-22 22:22:29,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:22:29,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669501228] [2022-07-22 22:22:29,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669501228] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:22:29,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:22:29,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-22 22:22:29,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800929342] [2022-07-22 22:22:29,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:22:29,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 22:22:29,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:22:29,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 22:22:29,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-07-22 22:22:29,347 INFO L87 Difference]: Start difference. First operand 219 states and 269 transitions. Second operand has 14 states, 13 states have (on average 4.538461538461538) internal successors, (59), 11 states have internal predecessors, (59), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2022-07-22 22:22:29,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:22:29,899 INFO L93 Difference]: Finished difference Result 225 states and 274 transitions. [2022-07-22 22:22:29,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 22:22:29,900 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.538461538461538) internal successors, (59), 11 states have internal predecessors, (59), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) Word has length 131 [2022-07-22 22:22:29,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:22:29,901 INFO L225 Difference]: With dead ends: 225 [2022-07-22 22:22:29,901 INFO L226 Difference]: Without dead ends: 223 [2022-07-22 22:22:29,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2022-07-22 22:22:29,902 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 69 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 22:22:29,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 618 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 22:22:29,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-07-22 22:22:29,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2022-07-22 22:22:29,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 151 states have (on average 1.0927152317880795) internal successors, (165), 154 states have internal predecessors, (165), 48 states have call successors, (48), 22 states have call predecessors, (48), 23 states have return successors, (59), 46 states have call predecessors, (59), 45 states have call successors, (59) [2022-07-22 22:22:29,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 272 transitions. [2022-07-22 22:22:29,923 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 272 transitions. Word has length 131 [2022-07-22 22:22:29,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:22:29,924 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 272 transitions. [2022-07-22 22:22:29,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.538461538461538) internal successors, (59), 11 states have internal predecessors, (59), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2022-07-22 22:22:29,924 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 272 transitions. [2022-07-22 22:22:29,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-22 22:22:29,926 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:22:29,926 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:22:29,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-22 22:22:29,926 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:22:29,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:22:29,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1763688684, now seen corresponding path program 1 times [2022-07-22 22:22:29,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:22:29,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893196751] [2022-07-22 22:22:29,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:22:29,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:22:30,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:30,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 22:22:30,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:30,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 22:22:30,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:30,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-22 22:22:30,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:30,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 22:22:30,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:30,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 22:22:30,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:30,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-22 22:22:30,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:30,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-22 22:22:30,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:30,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-07-22 22:22:30,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:30,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 22:22:30,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:30,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 22:22:30,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:30,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 22:22:30,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:30,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 22:22:30,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:30,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-22 22:22:30,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:30,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-22 22:22:30,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:30,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-22 22:22:30,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:30,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-07-22 22:22:30,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:30,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-07-22 22:22:30,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:30,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-07-22 22:22:30,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:30,312 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-22 22:22:30,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:22:30,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893196751] [2022-07-22 22:22:30,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893196751] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:22:30,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:22:30,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-22 22:22:30,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006008536] [2022-07-22 22:22:30,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:22:30,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-22 22:22:30,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:22:30,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-22 22:22:30,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-07-22 22:22:30,314 INFO L87 Difference]: Start difference. First operand 223 states and 272 transitions. Second operand has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 10 states have internal predecessors, (61), 4 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 3 states have call successors, (18) [2022-07-22 22:22:30,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:22:30,789 INFO L93 Difference]: Finished difference Result 263 states and 325 transitions. [2022-07-22 22:22:30,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 22:22:30,789 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 10 states have internal predecessors, (61), 4 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 3 states have call successors, (18) Word has length 142 [2022-07-22 22:22:30,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:22:30,792 INFO L225 Difference]: With dead ends: 263 [2022-07-22 22:22:30,792 INFO L226 Difference]: Without dead ends: 217 [2022-07-22 22:22:30,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-07-22 22:22:30,793 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 124 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 22:22:30,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 320 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 22:22:30,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-07-22 22:22:30,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 213. [2022-07-22 22:22:30,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 143 states have (on average 1.0909090909090908) internal successors, (156), 146 states have internal predecessors, (156), 46 states have call successors, (46), 21 states have call predecessors, (46), 23 states have return successors, (59), 45 states have call predecessors, (59), 44 states have call successors, (59) [2022-07-22 22:22:30,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 261 transitions. [2022-07-22 22:22:30,813 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 261 transitions. Word has length 142 [2022-07-22 22:22:30,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:22:30,813 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 261 transitions. [2022-07-22 22:22:30,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 10 states have internal predecessors, (61), 4 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 3 states have call successors, (18) [2022-07-22 22:22:30,814 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 261 transitions. [2022-07-22 22:22:30,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-07-22 22:22:30,815 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:22:30,815 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:22:30,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-22 22:22:30,816 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:22:30,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:22:30,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1844682897, now seen corresponding path program 1 times [2022-07-22 22:22:30,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:22:30,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778707933] [2022-07-22 22:22:30,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:22:30,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:22:30,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:30,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 22:22:30,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:30,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 22:22:30,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:30,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-22 22:22:30,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:30,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 22:22:30,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:30,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 22:22:31,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:31,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-22 22:22:31,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:31,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-22 22:22:31,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:31,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-07-22 22:22:31,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:31,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 22:22:31,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:31,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 22:22:31,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:31,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 22:22:31,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:31,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-22 22:22:31,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:31,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-22 22:22:31,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:31,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-22 22:22:31,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:31,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-22 22:22:31,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:31,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-22 22:22:31,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:31,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-07-22 22:22:31,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:31,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-22 22:22:31,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:31,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-07-22 22:22:31,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:31,233 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-07-22 22:22:31,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:22:31,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778707933] [2022-07-22 22:22:31,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778707933] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:22:31,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509293020] [2022-07-22 22:22:31,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:22:31,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:22:31,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:22:31,236 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 22:22:31,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-22 22:22:31,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:31,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 2788 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-22 22:22:31,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:22:32,179 INFO L356 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-07-22 22:22:32,180 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2022-07-22 22:22:32,183 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-07-22 22:22:32,183 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 22:22:32,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509293020] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:22:32,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 22:22:32,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 20 [2022-07-22 22:22:32,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178154889] [2022-07-22 22:22:32,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:22:32,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 22:22:32,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:22:32,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 22:22:32,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-07-22 22:22:32,185 INFO L87 Difference]: Start difference. First operand 213 states and 261 transitions. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 5 states have call successors, (20), 3 states have call predecessors, (20), 4 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-07-22 22:22:32,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:22:32,271 INFO L93 Difference]: Finished difference Result 294 states and 346 transitions. [2022-07-22 22:22:32,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 22:22:32,271 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 5 states have call successors, (20), 3 states have call predecessors, (20), 4 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 154 [2022-07-22 22:22:32,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:22:32,272 INFO L225 Difference]: With dead ends: 294 [2022-07-22 22:22:32,273 INFO L226 Difference]: Without dead ends: 217 [2022-07-22 22:22:32,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 180 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-07-22 22:22:32,276 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 12 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 22:22:32,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 573 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 124 Unchecked, 0.0s Time] [2022-07-22 22:22:32,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-07-22 22:22:32,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2022-07-22 22:22:32,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 148 states have (on average 1.087837837837838) internal successors, (161), 150 states have internal predecessors, (161), 44 states have call successors, (44), 23 states have call predecessors, (44), 24 states have return successors, (56), 43 states have call predecessors, (56), 42 states have call successors, (56) [2022-07-22 22:22:32,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 261 transitions. [2022-07-22 22:22:32,296 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 261 transitions. Word has length 154 [2022-07-22 22:22:32,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:22:32,296 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 261 transitions. [2022-07-22 22:22:32,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 5 states have call successors, (20), 3 states have call predecessors, (20), 4 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-07-22 22:22:32,297 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 261 transitions. [2022-07-22 22:22:32,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-07-22 22:22:32,298 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:22:32,298 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:22:32,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-22 22:22:32,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:22:32,523 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:22:32,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:22:32,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1588728610, now seen corresponding path program 2 times [2022-07-22 22:22:32,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:22:32,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447695098] [2022-07-22 22:22:32,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:22:32,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:22:32,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:32,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 22:22:32,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:32,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 22:22:32,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:32,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-22 22:22:32,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:32,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 22:22:32,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:32,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 22:22:32,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:32,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-22 22:22:32,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:32,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-22 22:22:32,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:32,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-07-22 22:22:32,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:32,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 22:22:32,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:32,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 22:22:32,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:32,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 22:22:32,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:32,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-22 22:22:32,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:32,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-22 22:22:32,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:32,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-22 22:22:32,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:32,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-07-22 22:22:32,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:32,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-22 22:22:32,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:32,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-07-22 22:22:32,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:32,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-07-22 22:22:32,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:32,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-07-22 22:22:32,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:32,925 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 30 proven. 45 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-07-22 22:22:32,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:22:32,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447695098] [2022-07-22 22:22:32,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447695098] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:22:32,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419567002] [2022-07-22 22:22:32,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 22:22:32,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:22:32,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:22:32,928 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 22:22:32,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-22 22:22:33,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 22:22:33,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 22:22:33,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 2810 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-22 22:22:33,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:22:40,671 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-07-22 22:22:40,671 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 22:22:40,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419567002] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:22:40,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 22:22:40,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [12] total 24 [2022-07-22 22:22:40,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002544829] [2022-07-22 22:22:40,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:22:40,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 22:22:40,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:22:40,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 22:22:40,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=474, Unknown=3, NotChecked=0, Total=552 [2022-07-22 22:22:40,673 INFO L87 Difference]: Start difference. First operand 217 states and 261 transitions. Second operand has 14 states, 14 states have (on average 6.071428571428571) internal successors, (85), 13 states have internal predecessors, (85), 6 states have call successors, (20), 4 states have call predecessors, (20), 5 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-07-22 22:22:42,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:22:42,467 INFO L93 Difference]: Finished difference Result 323 states and 374 transitions. [2022-07-22 22:22:42,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 22:22:42,468 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.071428571428571) internal successors, (85), 13 states have internal predecessors, (85), 6 states have call successors, (20), 4 states have call predecessors, (20), 5 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 160 [2022-07-22 22:22:42,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:22:42,469 INFO L225 Difference]: With dead ends: 323 [2022-07-22 22:22:42,469 INFO L226 Difference]: Without dead ends: 267 [2022-07-22 22:22:42,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 176 SyntacticMatches, 9 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=97, Invalid=601, Unknown=4, NotChecked=0, Total=702 [2022-07-22 22:22:42,470 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 17 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 906 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 22:22:42,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 906 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 149 Unchecked, 0.1s Time] [2022-07-22 22:22:42,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-07-22 22:22:42,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 248. [2022-07-22 22:22:42,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 172 states have (on average 1.0872093023255813) internal successors, (187), 175 states have internal predecessors, (187), 46 states have call successors, (46), 26 states have call predecessors, (46), 29 states have return successors, (59), 46 states have call predecessors, (59), 44 states have call successors, (59) [2022-07-22 22:22:42,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 292 transitions. [2022-07-22 22:22:42,490 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 292 transitions. Word has length 160 [2022-07-22 22:22:42,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:22:42,491 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 292 transitions. [2022-07-22 22:22:42,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.071428571428571) internal successors, (85), 13 states have internal predecessors, (85), 6 states have call successors, (20), 4 states have call predecessors, (20), 5 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-07-22 22:22:42,491 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 292 transitions. [2022-07-22 22:22:42,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-07-22 22:22:42,492 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:22:42,492 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:22:42,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-22 22:22:42,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-07-22 22:22:42,707 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:22:42,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:22:42,708 INFO L85 PathProgramCache]: Analyzing trace with hash -634804810, now seen corresponding path program 1 times [2022-07-22 22:22:42,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:22:42,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649974367] [2022-07-22 22:22:42,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:22:42,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:22:42,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:42,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 22:22:42,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:42,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 22:22:42,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:42,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-22 22:22:42,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:42,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 22:22:42,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:42,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 22:22:42,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:42,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-22 22:22:42,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:42,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-22 22:22:42,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:42,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-07-22 22:22:42,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:42,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 22:22:42,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:42,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 22:22:42,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:42,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 22:22:42,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:42,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-22 22:22:42,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:42,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 22:22:42,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:43,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 22:22:43,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:43,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-22 22:22:43,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:43,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-07-22 22:22:43,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:43,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-22 22:22:43,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:43,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-07-22 22:22:43,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:43,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2022-07-22 22:22:43,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:43,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2022-07-22 22:22:43,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:43,049 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 20 proven. 18 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-07-22 22:22:43,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:22:43,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649974367] [2022-07-22 22:22:43,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649974367] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:22:43,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061353171] [2022-07-22 22:22:43,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:22:43,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:22:43,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:22:43,051 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 22:22:43,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-22 22:22:43,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:22:43,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 2839 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-22 22:22:43,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:22:43,532 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 22:22:43,694 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-22 22:22:43,694 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-22 22:22:44,001 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-22 22:22:44,001 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-22 22:22:44,034 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-22 22:22:46,125 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-22 22:22:56,229 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-22 22:23:00,558 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-22 22:23:00,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-22 22:23:04,788 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-22 22:23:04,862 INFO L356 Elim1Store]: treesize reduction 21, result has 12.5 percent of original size [2022-07-22 22:23:04,863 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 17 [2022-07-22 22:23:05,238 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-07-22 22:23:05,246 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 48 proven. 98 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-22 22:23:05,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:23:09,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061353171] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:23:09,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 22:23:09,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 28] total 36 [2022-07-22 22:23:09,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362056369] [2022-07-22 22:23:09,901 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 22:23:09,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-22 22:23:09,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:23:09,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-22 22:23:09,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1462, Unknown=9, NotChecked=0, Total=1640 [2022-07-22 22:23:09,902 INFO L87 Difference]: Start difference. First operand 248 states and 292 transitions. Second operand has 36 states, 36 states have (on average 3.7777777777777777) internal successors, (136), 32 states have internal predecessors, (136), 16 states have call successors, (42), 10 states have call predecessors, (42), 11 states have return successors, (40), 13 states have call predecessors, (40), 15 states have call successors, (40) [2022-07-22 22:23:12,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:23:12,969 INFO L93 Difference]: Finished difference Result 339 states and 402 transitions. [2022-07-22 22:23:12,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-22 22:23:12,971 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.7777777777777777) internal successors, (136), 32 states have internal predecessors, (136), 16 states have call successors, (42), 10 states have call predecessors, (42), 11 states have return successors, (40), 13 states have call predecessors, (40), 15 states have call successors, (40) Word has length 163 [2022-07-22 22:23:12,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:23:12,973 INFO L225 Difference]: With dead ends: 339 [2022-07-22 22:23:12,973 INFO L226 Difference]: Without dead ends: 266 [2022-07-22 22:23:12,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 226 SyntacticMatches, 22 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1287 ImplicationChecksByTransitivity, 28.0s TimeCoverageRelationStatistics Valid=337, Invalid=2959, Unknown=10, NotChecked=0, Total=3306 [2022-07-22 22:23:12,975 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 99 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 2423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1483 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 22:23:12,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 717 Invalid, 2423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 841 Invalid, 0 Unknown, 1483 Unchecked, 0.6s Time] [2022-07-22 22:23:12,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-07-22 22:23:12,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 254. [2022-07-22 22:23:12,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 178 states have (on average 1.0842696629213484) internal successors, (193), 181 states have internal predecessors, (193), 46 states have call successors, (46), 28 states have call predecessors, (46), 29 states have return successors, (54), 44 states have call predecessors, (54), 43 states have call successors, (54) [2022-07-22 22:23:12,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 293 transitions. [2022-07-22 22:23:12,998 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 293 transitions. Word has length 163 [2022-07-22 22:23:12,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:23:12,998 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 293 transitions. [2022-07-22 22:23:12,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.7777777777777777) internal successors, (136), 32 states have internal predecessors, (136), 16 states have call successors, (42), 10 states have call predecessors, (42), 11 states have return successors, (40), 13 states have call predecessors, (40), 15 states have call successors, (40) [2022-07-22 22:23:12,999 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 293 transitions. [2022-07-22 22:23:13,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-07-22 22:23:13,000 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:23:13,000 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:23:13,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-22 22:23:13,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:23:13,227 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:23:13,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:23:13,228 INFO L85 PathProgramCache]: Analyzing trace with hash 513147373, now seen corresponding path program 1 times [2022-07-22 22:23:13,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:23:13,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890619190] [2022-07-22 22:23:13,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:23:13,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:23:13,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:13,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 22:23:13,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:13,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 22:23:13,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:13,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-22 22:23:13,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:13,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 22:23:13,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:13,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 22:23:13,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:13,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-22 22:23:13,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:13,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-22 22:23:13,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:13,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-07-22 22:23:13,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:13,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 22:23:13,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:13,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 22:23:13,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:13,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 22:23:13,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:13,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-22 22:23:13,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:13,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-22 22:23:13,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:13,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-22 22:23:13,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:13,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-22 22:23:13,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:13,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-22 22:23:13,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:13,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-22 22:23:13,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:13,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-07-22 22:23:13,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:13,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2022-07-22 22:23:13,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:13,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2022-07-22 22:23:13,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:13,584 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 28 proven. 12 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-07-22 22:23:13,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:23:13,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890619190] [2022-07-22 22:23:13,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890619190] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:23:13,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835025303] [2022-07-22 22:23:13,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:23:13,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:23:13,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:23:13,586 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 22:23:13,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-22 22:23:14,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:14,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 2839 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-22 22:23:14,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:23:14,032 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-22 22:23:14,357 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-07-22 22:23:14,357 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 22:23:14,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835025303] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:23:14,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 22:23:14,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2022-07-22 22:23:14,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196535936] [2022-07-22 22:23:14,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:23:14,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 22:23:14,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:23:14,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 22:23:14,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-07-22 22:23:14,358 INFO L87 Difference]: Start difference. First operand 254 states and 293 transitions. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 4 states have call successors, (21), 3 states have call predecessors, (21), 4 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2022-07-22 22:23:14,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:23:14,436 INFO L93 Difference]: Finished difference Result 362 states and 410 transitions. [2022-07-22 22:23:14,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 22:23:14,436 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 4 states have call successors, (21), 3 states have call predecessors, (21), 4 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) Word has length 163 [2022-07-22 22:23:14,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:23:14,438 INFO L225 Difference]: With dead ends: 362 [2022-07-22 22:23:14,438 INFO L226 Difference]: Without dead ends: 262 [2022-07-22 22:23:14,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 189 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-07-22 22:23:14,439 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 9 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 22:23:14,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 493 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 118 Unchecked, 0.0s Time] [2022-07-22 22:23:14,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-07-22 22:23:14,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 256. [2022-07-22 22:23:14,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 181 states have (on average 1.0828729281767955) internal successors, (196), 184 states have internal predecessors, (196), 44 states have call successors, (44), 29 states have call predecessors, (44), 30 states have return successors, (49), 42 states have call predecessors, (49), 41 states have call successors, (49) [2022-07-22 22:23:14,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 289 transitions. [2022-07-22 22:23:14,459 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 289 transitions. Word has length 163 [2022-07-22 22:23:14,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:23:14,459 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 289 transitions. [2022-07-22 22:23:14,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 4 states have call successors, (21), 3 states have call predecessors, (21), 4 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2022-07-22 22:23:14,460 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 289 transitions. [2022-07-22 22:23:14,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-07-22 22:23:14,461 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:23:14,461 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:23:14,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-22 22:23:14,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:23:14,687 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:23:14,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:23:14,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1527377470, now seen corresponding path program 2 times [2022-07-22 22:23:14,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:23:14,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5321945] [2022-07-22 22:23:14,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:23:14,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:23:14,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:15,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 22:23:15,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:15,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 22:23:15,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:15,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-22 22:23:15,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:15,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 22:23:15,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:15,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 22:23:15,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:15,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-22 22:23:15,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:15,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-22 22:23:15,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:15,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-07-22 22:23:15,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:16,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 22:23:16,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:16,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 22:23:16,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:16,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 22:23:16,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:16,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-22 22:23:16,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:16,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-22 22:23:16,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:16,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-22 22:23:16,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:16,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-22 22:23:16,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:16,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-22 22:23:16,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:16,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-22 22:23:16,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:16,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-07-22 22:23:16,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:16,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2022-07-22 22:23:16,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:16,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-07-22 22:23:16,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:16,386 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 15 proven. 99 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-22 22:23:16,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:23:16,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5321945] [2022-07-22 22:23:16,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5321945] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:23:16,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48722465] [2022-07-22 22:23:16,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 22:23:16,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:23:16,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:23:16,392 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 22:23:16,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-22 22:23:16,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 22:23:16,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 22:23:16,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 2861 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-22 22:23:16,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:23:16,894 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 22:23:16,897 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 22:23:25,994 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 105 proven. 13 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-07-22 22:23:25,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:23:26,529 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 49 [2022-07-22 22:23:26,539 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 49 [2022-07-22 22:23:26,547 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-22 22:23:26,548 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 1 [2022-07-22 22:23:28,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48722465] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:23:28,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 22:23:28,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 18] total 45 [2022-07-22 22:23:28,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034752568] [2022-07-22 22:23:28,124 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 22:23:28,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-22 22:23:28,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:23:28,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-22 22:23:28,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=2586, Unknown=2, NotChecked=0, Total=2756 [2022-07-22 22:23:28,125 INFO L87 Difference]: Start difference. First operand 256 states and 289 transitions. Second operand has 45 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 39 states have internal predecessors, (138), 20 states have call successors, (40), 5 states have call predecessors, (40), 10 states have return successors, (39), 17 states have call predecessors, (39), 20 states have call successors, (39) [2022-07-22 22:23:33,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:23:33,746 INFO L93 Difference]: Finished difference Result 326 states and 361 transitions. [2022-07-22 22:23:33,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-22 22:23:33,747 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 39 states have internal predecessors, (138), 20 states have call successors, (40), 5 states have call predecessors, (40), 10 states have return successors, (39), 17 states have call predecessors, (39), 20 states have call successors, (39) Word has length 169 [2022-07-22 22:23:33,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:23:33,748 INFO L225 Difference]: With dead ends: 326 [2022-07-22 22:23:33,748 INFO L226 Difference]: Without dead ends: 274 [2022-07-22 22:23:33,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 221 SyntacticMatches, 10 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2445 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=700, Invalid=8040, Unknown=2, NotChecked=0, Total=8742 [2022-07-22 22:23:33,751 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 173 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 1998 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 2726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 599 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-22 22:23:33,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 739 Invalid, 2726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1998 Invalid, 0 Unknown, 599 Unchecked, 1.7s Time] [2022-07-22 22:23:33,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-07-22 22:23:33,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 256. [2022-07-22 22:23:33,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 181 states have (on average 1.0828729281767955) internal successors, (196), 184 states have internal predecessors, (196), 44 states have call successors, (44), 29 states have call predecessors, (44), 30 states have return successors, (47), 42 states have call predecessors, (47), 41 states have call successors, (47) [2022-07-22 22:23:33,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 287 transitions. [2022-07-22 22:23:33,775 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 287 transitions. Word has length 169 [2022-07-22 22:23:33,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:23:33,776 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 287 transitions. [2022-07-22 22:23:33,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 39 states have internal predecessors, (138), 20 states have call successors, (40), 5 states have call predecessors, (40), 10 states have return successors, (39), 17 states have call predecessors, (39), 20 states have call successors, (39) [2022-07-22 22:23:33,776 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 287 transitions. [2022-07-22 22:23:33,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-07-22 22:23:33,777 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:23:33,777 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:23:33,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-22 22:23:33,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:23:33,991 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:23:33,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:23:33,991 INFO L85 PathProgramCache]: Analyzing trace with hash 755558594, now seen corresponding path program 1 times [2022-07-22 22:23:33,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:23:33,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121609540] [2022-07-22 22:23:33,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:23:33,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:23:34,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:34,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 22:23:34,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:34,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 22:23:34,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:34,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-22 22:23:34,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:34,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 22:23:34,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:34,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 22:23:34,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:34,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-22 22:23:34,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:34,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-22 22:23:34,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:34,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-07-22 22:23:34,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:35,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 22:23:35,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:35,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 22:23:35,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:35,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 22:23:35,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:35,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-22 22:23:35,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:35,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-22 22:23:35,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:35,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-22 22:23:35,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:35,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-07-22 22:23:35,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:35,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-22 22:23:35,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:35,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-07-22 22:23:35,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:35,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-07-22 22:23:35,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:35,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-07-22 22:23:35,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:35,345 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-07-22 22:23:35,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:23:35,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121609540] [2022-07-22 22:23:35,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121609540] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:23:35,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:23:35,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-07-22 22:23:35,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142957406] [2022-07-22 22:23:35,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:23:35,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-22 22:23:35,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:23:35,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-22 22:23:35,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2022-07-22 22:23:35,347 INFO L87 Difference]: Start difference. First operand 256 states and 287 transitions. Second operand has 25 states, 23 states have (on average 2.782608695652174) internal successors, (64), 21 states have internal predecessors, (64), 12 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (19), 12 states have call predecessors, (19), 11 states have call successors, (19) [2022-07-22 22:23:36,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:23:36,659 INFO L93 Difference]: Finished difference Result 276 states and 312 transitions. [2022-07-22 22:23:36,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-22 22:23:36,660 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.782608695652174) internal successors, (64), 21 states have internal predecessors, (64), 12 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (19), 12 states have call predecessors, (19), 11 states have call successors, (19) Word has length 172 [2022-07-22 22:23:36,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:23:36,661 INFO L225 Difference]: With dead ends: 276 [2022-07-22 22:23:36,661 INFO L226 Difference]: Without dead ends: 263 [2022-07-22 22:23:36,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=160, Invalid=1246, Unknown=0, NotChecked=0, Total=1406 [2022-07-22 22:23:36,662 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 134 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 1762 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 1882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-22 22:23:36,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 452 Invalid, 1882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1762 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-22 22:23:36,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-07-22 22:23:36,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 259. [2022-07-22 22:23:36,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 182 states have (on average 1.0824175824175823) internal successors, (197), 185 states have internal predecessors, (197), 46 states have call successors, (46), 29 states have call predecessors, (46), 30 states have return successors, (50), 44 states have call predecessors, (50), 43 states have call successors, (50) [2022-07-22 22:23:36,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 293 transitions. [2022-07-22 22:23:36,687 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 293 transitions. Word has length 172 [2022-07-22 22:23:36,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:23:36,687 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 293 transitions. [2022-07-22 22:23:36,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.782608695652174) internal successors, (64), 21 states have internal predecessors, (64), 12 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (19), 12 states have call predecessors, (19), 11 states have call successors, (19) [2022-07-22 22:23:36,688 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 293 transitions. [2022-07-22 22:23:36,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-07-22 22:23:36,689 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:23:36,689 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:23:36,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-07-22 22:23:36,690 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:23:36,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:23:36,690 INFO L85 PathProgramCache]: Analyzing trace with hash -637391594, now seen corresponding path program 2 times [2022-07-22 22:23:36,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:23:36,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893744064] [2022-07-22 22:23:36,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:23:36,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:23:38,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:39,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 22:23:39,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:39,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 22:23:39,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:39,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-22 22:23:39,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:39,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 22:23:39,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:39,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 22:23:39,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:39,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-22 22:23:39,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:39,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-22 22:23:39,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:39,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-07-22 22:23:39,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:42,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 22:23:42,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:42,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 22:23:42,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:42,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 22:23:42,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:42,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-22 22:23:42,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:42,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 22:23:42,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:42,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-22 22:23:42,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:42,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-22 22:23:42,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:42,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-22 22:23:42,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:42,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-07-22 22:23:42,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:42,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2022-07-22 22:23:42,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:42,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-07-22 22:23:42,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:42,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2022-07-22 22:23:42,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:23:42,640 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 29 proven. 54 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-07-22 22:23:42,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:23:42,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893744064] [2022-07-22 22:23:42,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893744064] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:23:42,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461582797] [2022-07-22 22:23:42,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 22:23:42,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:23:42,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:23:42,644 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 22:23:42,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-22 22:23:43,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 22:23:43,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 22:23:43,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 2883 conjuncts, 232 conjunts are in the unsatisfiable core [2022-07-22 22:23:43,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:23:43,400 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 22:23:43,969 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-22 22:23:43,969 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-22 22:23:44,222 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-22 22:23:44,228 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-22 22:23:44,234 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-22 22:23:48,696 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-22 22:23:48,696 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-22 22:23:48,838 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-22 22:23:48,848 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2022-07-22 22:23:48,859 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2022-07-22 22:23:49,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 22:23:49,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 22:23:49,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 22:23:49,652 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-22 22:23:49,653 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 2 case distinctions, treesize of input 115 treesize of output 109 [2022-07-22 22:23:49,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 22:23:49,659 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 101 [2022-07-22 22:23:49,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 22:23:49,666 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 107 [2022-07-22 22:23:49,850 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-07-22 22:23:49,854 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2022-07-22 22:23:49,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 22:23:49,864 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-22 22:23:49,864 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 25 [2022-07-22 22:23:56,463 INFO L356 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2022-07-22 22:23:56,464 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 26 [2022-07-22 22:23:56,469 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 22:23:56,489 INFO L356 Elim1Store]: treesize reduction 35, result has 35.2 percent of original size [2022-07-22 22:23:56,489 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 37 [2022-07-22 22:24:00,876 INFO L356 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2022-07-22 22:24:00,876 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 26 [2022-07-22 22:24:00,882 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 22:24:00,902 INFO L356 Elim1Store]: treesize reduction 35, result has 35.2 percent of original size [2022-07-22 22:24:00,902 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 37 [2022-07-22 22:24:01,125 INFO L356 Elim1Store]: treesize reduction 35, result has 35.2 percent of original size [2022-07-22 22:24:01,125 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 37 [2022-07-22 22:24:01,130 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 22:24:01,149 INFO L356 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2022-07-22 22:24:01,149 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 26 [2022-07-22 22:24:05,834 INFO L356 Elim1Store]: treesize reduction 35, result has 35.2 percent of original size [2022-07-22 22:24:05,834 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 37 [2022-07-22 22:24:05,855 INFO L356 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2022-07-22 22:24:05,856 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 26 [2022-07-22 22:24:05,874 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 22:24:06,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 22:24:06,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 22:24:06,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 22:24:06,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 22:24:06,583 INFO L356 Elim1Store]: treesize reduction 48, result has 32.4 percent of original size [2022-07-22 22:24:06,583 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 83 [2022-07-22 22:24:06,617 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-22 22:24:06,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 51 [2022-07-22 22:24:06,632 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 22:24:06,636 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-22 22:24:06,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 82 treesize of output 66 [2022-07-22 22:24:06,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 22:24:06,655 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-07-22 22:24:28,669 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2022-07-22 22:24:28,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 22:24:28,683 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 42 [2022-07-22 22:24:29,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 22:24:29,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 22:24:29,900 INFO L356 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-07-22 22:24:29,901 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 135 treesize of output 83 [2022-07-22 22:24:30,236 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 44 proven. 178 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-22 22:24:30,236 INFO L328 TraceCheckSpWp]: Computing backward predicates...