./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be16_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be16_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 e59944759baac4a78b3b5460ff6f3a8abaec03123fb9537d86aeca785269fb41 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 22:37:42,830 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 22:37:42,833 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 22:37:42,873 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 22:37:42,873 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 22:37:42,874 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 22:37:42,875 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 22:37:42,876 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 22:37:42,877 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 22:37:42,878 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 22:37:42,879 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 22:37:42,880 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 22:37:42,880 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 22:37:42,881 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 22:37:42,882 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 22:37:42,883 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 22:37:42,884 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 22:37:42,885 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 22:37:42,886 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 22:37:42,888 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 22:37:42,889 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 22:37:42,890 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 22:37:42,891 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 22:37:42,892 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 22:37:42,893 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 22:37:42,895 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 22:37:42,896 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 22:37:42,896 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 22:37:42,897 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 22:37:42,897 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 22:37:42,898 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 22:37:42,899 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 22:37:42,899 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 22:37:42,900 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 22:37:42,901 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 22:37:42,902 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 22:37:42,902 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 22:37:42,902 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 22:37:42,903 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 22:37:42,903 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 22:37:42,904 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 22:37:42,909 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 22:37:42,910 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-07-13 22:37:42,939 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 22:37:42,939 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 22:37:42,940 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 22:37:42,940 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 22:37:42,941 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 22:37:42,941 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 22:37:42,941 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 22:37:42,941 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 22:37:42,942 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 22:37:42,942 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 22:37:42,943 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 22:37:42,943 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 22:37:42,943 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 22:37:42,943 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 22:37:42,943 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 22:37:42,944 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 22:37:42,944 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 22:37:42,944 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 22:37:42,944 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 22:37:42,945 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 22:37:42,945 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 22:37:42,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 22:37:42,946 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 22:37:42,946 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 22:37:42,946 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 22:37:42,946 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 22:37:42,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 22:37:42,947 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 22:37:42,947 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 22:37:42,947 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 22:37:42,947 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e59944759baac4a78b3b5460ff6f3a8abaec03123fb9537d86aeca785269fb41 [2022-07-13 22:37:43,165 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 22:37:43,188 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 22:37:43,190 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 22:37:43,191 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 22:37:43,191 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 22:37:43,192 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be16_harness.i [2022-07-13 22:37:43,264 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e731f7519/55ace73f4ff84e4f9444045e35b59ee2/FLAGbc9284130 [2022-07-13 22:37:43,976 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 22:37:43,976 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be16_harness.i [2022-07-13 22:37:44,006 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e731f7519/55ace73f4ff84e4f9444045e35b59ee2/FLAGbc9284130 [2022-07-13 22:37:44,272 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e731f7519/55ace73f4ff84e4f9444045e35b59ee2 [2022-07-13 22:37:44,274 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 22:37:44,275 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 22:37:44,276 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 22:37:44,276 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 22:37:44,280 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 22:37:44,280 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:37:44" (1/1) ... [2022-07-13 22:37:44,281 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f13562b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:37:44, skipping insertion in model container [2022-07-13 22:37:44,281 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:37:44" (1/1) ... [2022-07-13 22:37:44,287 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 22:37:44,366 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 22:37:44,567 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be16_harness.i[4497,4510] [2022-07-13 22:37:44,575 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be16_harness.i[4557,4570] [2022-07-13 22:37:45,288 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-13 22:37:45,291 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-13 22:37:45,291 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-13 22:37:45,292 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-13 22:37:45,293 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-13 22:37:45,301 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-13 22:37:45,302 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-13 22:37:45,303 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-13 22:37:45,304 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-13 22:37:45,546 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-07-13 22:37:45,547 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-07-13 22:37:45,547 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-07-13 22:37:45,548 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-07-13 22:37:45,550 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-07-13 22:37:45,550 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-07-13 22:37:45,551 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-07-13 22:37:45,551 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-07-13 22:37:45,552 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-07-13 22:37:45,552 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-07-13 22:37:45,704 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-07-13 22:37:45,786 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-13 22:37:45,798 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-13 22:37:45,864 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 22:37:45,913 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 22:37:45,937 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be16_harness.i[4497,4510] [2022-07-13 22:37:45,937 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be16_harness.i[4557,4570] [2022-07-13 22:37:45,967 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-13 22:37:45,967 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-13 22:37:45,968 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-13 22:37:45,968 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-13 22:37:45,969 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-13 22:37:45,973 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-13 22:37:45,976 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-13 22:37:45,977 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-13 22:37:45,977 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-13 22:37:46,023 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-07-13 22:37:46,036 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-07-13 22:37:46,036 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-07-13 22:37:46,037 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-07-13 22:37:46,040 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-07-13 22:37:46,041 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-07-13 22:37:46,041 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-07-13 22:37:46,042 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-07-13 22:37:46,042 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-07-13 22:37:46,047 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-07-13 22:37:46,065 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-07-13 22:37:46,127 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-13 22:37:46,127 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-13 22:37:46,163 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 22:37:46,389 INFO L208 MainTranslator]: Completed translation [2022-07-13 22:37:46,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:37:46 WrapperNode [2022-07-13 22:37:46,390 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 22:37:46,391 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 22:37:46,391 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 22:37:46,391 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 22:37:46,414 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:37:46" (1/1) ... [2022-07-13 22:37:46,555 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:37:46" (1/1) ... [2022-07-13 22:37:46,660 INFO L137 Inliner]: procedures = 691, calls = 2619, calls flagged for inlining = 62, calls inlined = 10, statements flattened = 866 [2022-07-13 22:37:46,660 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 22:37:46,662 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 22:37:46,662 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 22:37:46,662 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 22:37:46,670 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:37:46" (1/1) ... [2022-07-13 22:37:46,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:37:46" (1/1) ... [2022-07-13 22:37:46,681 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:37:46" (1/1) ... [2022-07-13 22:37:46,682 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:37:46" (1/1) ... [2022-07-13 22:37:46,729 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:37:46" (1/1) ... [2022-07-13 22:37:46,744 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:37:46" (1/1) ... [2022-07-13 22:37:46,750 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:37:46" (1/1) ... [2022-07-13 22:37:46,771 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 22:37:46,774 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 22:37:46,775 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 22:37:46,775 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 22:37:46,776 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:37:46" (1/1) ... [2022-07-13 22:37:46,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 22:37:46,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:37:46,804 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) [2022-07-13 22:37:46,831 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 [2022-07-13 22:37:46,851 INFO L130 BoogieDeclarations]: Found specification of procedure htons [2022-07-13 22:37:46,852 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2022-07-13 22:37:46,852 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2022-07-13 22:37:46,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 22:37:46,853 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-07-13 22:37:46,853 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-07-13 22:37:46,853 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 22:37:46,853 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-13 22:37:46,853 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-13 22:37:46,854 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-13 22:37:46,854 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 22:37:46,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-13 22:37:46,855 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_impl [2022-07-13 22:37:46,855 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_impl [2022-07-13 22:37:46,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 22:37:46,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 22:37:46,856 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-07-13 22:37:46,856 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-07-13 22:37:46,856 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2022-07-13 22:37:46,857 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2022-07-13 22:37:46,857 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-13 22:37:46,857 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-13 22:37:46,857 INFO L130 BoogieDeclarations]: Found specification of procedure my_memcpy [2022-07-13 22:37:46,857 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memcpy [2022-07-13 22:37:46,857 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 22:37:46,858 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-13 22:37:46,858 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_write [2022-07-13 22:37:46,858 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_write [2022-07-13 22:37:46,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-13 22:37:46,859 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2022-07-13 22:37:46,859 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2022-07-13 22:37:46,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 22:37:46,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 22:37:47,153 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 22:37:47,155 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 22:37:48,130 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 22:37:48,137 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 22:37:48,137 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-13 22:37:48,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:37:48 BoogieIcfgContainer [2022-07-13 22:37:48,139 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 22:37:48,141 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 22:37:48,141 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 22:37:48,144 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 22:37:48,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 10:37:44" (1/3) ... [2022-07-13 22:37:48,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57d3c979 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:37:48, skipping insertion in model container [2022-07-13 22:37:48,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:37:46" (2/3) ... [2022-07-13 22:37:48,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57d3c979 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:37:48, skipping insertion in model container [2022-07-13 22:37:48,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:37:48" (3/3) ... [2022-07-13 22:37:48,146 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_write_be16_harness.i [2022-07-13 22:37:48,159 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 22:37:48,159 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 22:37:48,203 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 22:37:48,208 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@6036553, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5fde5d42 [2022-07-13 22:37:48,209 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 22:37:48,213 INFO L276 IsEmpty]: Start isEmpty. Operand has 132 states, 86 states have (on average 1.2325581395348837) internal successors, (106), 87 states have internal predecessors, (106), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-07-13 22:37:48,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-07-13 22:37:48,223 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 22:37:48,224 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2022-07-13 22:37:48,224 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 22:37:48,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:37:48,229 INFO L85 PathProgramCache]: Analyzing trace with hash 239952465, now seen corresponding path program 1 times [2022-07-13 22:37:48,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:37:48,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379052496] [2022-07-13 22:37:48,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:37:48,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:37:48,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:48,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 22:37:48,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:48,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 22:37:48,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:48,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 22:37:48,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:48,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 22:37:48,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:48,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 22:37:48,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:48,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-13 22:37:48,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:48,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-13 22:37:48,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:48,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-13 22:37:48,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:48,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-07-13 22:37:48,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:48,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-07-13 22:37:48,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:48,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-07-13 22:37:48,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:48,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-13 22:37:48,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:49,006 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-07-13 22:37:49,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:37:49,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379052496] [2022-07-13 22:37:49,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379052496] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:37:49,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:37:49,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 22:37:49,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866087232] [2022-07-13 22:37:49,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:37:49,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 22:37:49,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:37:49,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 22:37:49,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 22:37:49,048 INFO L87 Difference]: Start difference. First operand has 132 states, 86 states have (on average 1.2325581395348837) internal successors, (106), 87 states have internal predecessors, (106), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2022-07-13 22:37:49,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 22:37:49,328 INFO L93 Difference]: Finished difference Result 260 states and 369 transitions. [2022-07-13 22:37:49,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 22:37:49,330 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) Word has length 86 [2022-07-13 22:37:49,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 22:37:49,338 INFO L225 Difference]: With dead ends: 260 [2022-07-13 22:37:49,339 INFO L226 Difference]: Without dead ends: 127 [2022-07-13 22:37:49,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 22:37:49,346 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 62 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 22:37:49,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 191 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 22:37:49,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-13 22:37:49,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-07-13 22:37:49,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 82 states have (on average 1.2073170731707317) internal successors, (99), 83 states have internal predecessors, (99), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-07-13 22:37:49,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 166 transitions. [2022-07-13 22:37:49,389 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 166 transitions. Word has length 86 [2022-07-13 22:37:49,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 22:37:49,389 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 166 transitions. [2022-07-13 22:37:49,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2022-07-13 22:37:49,390 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 166 transitions. [2022-07-13 22:37:49,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-07-13 22:37:49,393 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 22:37:49,393 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2022-07-13 22:37:49,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 22:37:49,394 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 22:37:49,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:37:49,394 INFO L85 PathProgramCache]: Analyzing trace with hash 89659733, now seen corresponding path program 1 times [2022-07-13 22:37:49,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:37:49,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106684714] [2022-07-13 22:37:49,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:37:49,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:37:49,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:49,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 22:37:49,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:49,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 22:37:49,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:49,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 22:37:49,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:49,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 22:37:49,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:49,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 22:37:49,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:49,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-13 22:37:49,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:49,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-13 22:37:49,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:49,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-13 22:37:49,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:49,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-07-13 22:37:49,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:49,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-07-13 22:37:49,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:49,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-07-13 22:37:49,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:49,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-13 22:37:49,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:49,770 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-13 22:37:49,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:37:49,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106684714] [2022-07-13 22:37:49,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106684714] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:37:49,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174669909] [2022-07-13 22:37:49,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:37:49,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:37:49,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:37:49,776 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) [2022-07-13 22:37:49,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 22:37:50,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:50,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 2620 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 22:37:50,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:37:50,459 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-13 22:37:50,460 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 22:37:50,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174669909] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:37:50,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 22:37:50,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-07-13 22:37:50,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102614249] [2022-07-13 22:37:50,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:37:50,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:37:50,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:37:50,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:37:50,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-07-13 22:37:50,464 INFO L87 Difference]: Start difference. First operand 127 states and 166 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-07-13 22:37:50,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 22:37:50,644 INFO L93 Difference]: Finished difference Result 232 states and 311 transitions. [2022-07-13 22:37:50,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 22:37:50,645 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 86 [2022-07-13 22:37:50,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 22:37:50,648 INFO L225 Difference]: With dead ends: 232 [2022-07-13 22:37:50,648 INFO L226 Difference]: Without dead ends: 130 [2022-07-13 22:37:50,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-07-13 22:37:50,650 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 195 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 22:37:50,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 471 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 22:37:50,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-07-13 22:37:50,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-07-13 22:37:50,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 84 states have (on average 1.2023809523809523) internal successors, (101), 86 states have internal predecessors, (101), 34 states have call successors, (34), 10 states have call predecessors, (34), 11 states have return successors, (37), 33 states have call predecessors, (37), 33 states have call successors, (37) [2022-07-13 22:37:50,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 172 transitions. [2022-07-13 22:37:50,666 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 172 transitions. Word has length 86 [2022-07-13 22:37:50,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 22:37:50,667 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 172 transitions. [2022-07-13 22:37:50,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-07-13 22:37:50,667 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 172 transitions. [2022-07-13 22:37:50,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-13 22:37:50,670 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 22:37:50,670 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 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] [2022-07-13 22:37:50,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 22:37:50,895 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 [2022-07-13 22:37:50,896 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 22:37:50,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:37:50,896 INFO L85 PathProgramCache]: Analyzing trace with hash -171255798, now seen corresponding path program 1 times [2022-07-13 22:37:50,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:37:50,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891643900] [2022-07-13 22:37:50,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:37:50,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:37:51,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:51,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 22:37:51,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:51,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 22:37:51,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:51,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 22:37:51,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:51,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 22:37:51,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:51,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 22:37:51,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:51,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 22:37:51,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:51,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-13 22:37:51,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:51,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-13 22:37:51,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:51,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-07-13 22:37:51,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:51,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-07-13 22:37:51,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:51,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-07-13 22:37:51,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:51,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-07-13 22:37:51,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:51,293 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-13 22:37:51,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:37:51,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891643900] [2022-07-13 22:37:51,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891643900] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:37:51,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970313032] [2022-07-13 22:37:51,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:37:51,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:37:51,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:37:51,296 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) [2022-07-13 22:37:51,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 22:37:51,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:51,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 2637 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 22:37:51,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:37:51,912 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-13 22:37:51,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 22:37:51,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970313032] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:37:51,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 22:37:51,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2022-07-13 22:37:51,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664651406] [2022-07-13 22:37:51,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:37:51,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 22:37:51,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:37:51,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 22:37:51,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-07-13 22:37:51,914 INFO L87 Difference]: Start difference. First operand 130 states and 172 transitions. Second operand has 7 states, 6 states have (on average 8.333333333333334) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-13 22:37:52,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 22:37:52,115 INFO L93 Difference]: Finished difference Result 227 states and 302 transitions. [2022-07-13 22:37:52,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 22:37:52,116 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.333333333333334) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) Word has length 92 [2022-07-13 22:37:52,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 22:37:52,120 INFO L225 Difference]: With dead ends: 227 [2022-07-13 22:37:52,120 INFO L226 Difference]: Without dead ends: 130 [2022-07-13 22:37:52,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-07-13 22:37:52,126 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 212 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 22:37:52,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 581 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 22:37:52,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-07-13 22:37:52,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-07-13 22:37:52,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 84 states have (on average 1.2023809523809523) internal successors, (101), 86 states have internal predecessors, (101), 34 states have call successors, (34), 10 states have call predecessors, (34), 11 states have return successors, (36), 33 states have call predecessors, (36), 33 states have call successors, (36) [2022-07-13 22:37:52,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 171 transitions. [2022-07-13 22:37:52,152 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 171 transitions. Word has length 92 [2022-07-13 22:37:52,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 22:37:52,152 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 171 transitions. [2022-07-13 22:37:52,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.333333333333334) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-13 22:37:52,153 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 171 transitions. [2022-07-13 22:37:52,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-07-13 22:37:52,159 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 22:37:52,159 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2022-07-13 22:37:52,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 22:37:52,376 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 [2022-07-13 22:37:52,376 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 22:37:52,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:37:52,377 INFO L85 PathProgramCache]: Analyzing trace with hash -358018689, now seen corresponding path program 2 times [2022-07-13 22:37:52,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:37:52,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818010909] [2022-07-13 22:37:52,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:37:52,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:37:52,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:52,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 22:37:52,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:52,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 22:37:52,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:52,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 22:37:52,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:52,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 22:37:52,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:52,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 22:37:52,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:52,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 22:37:52,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:52,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-13 22:37:52,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:52,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-13 22:37:52,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:52,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-07-13 22:37:52,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:52,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-07-13 22:37:52,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:52,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-07-13 22:37:52,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:52,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-13 22:37:52,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:52,689 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-13 22:37:52,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:37:52,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818010909] [2022-07-13 22:37:52,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818010909] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:37:52,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302716304] [2022-07-13 22:37:52,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 22:37:52,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:37:52,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:37:52,696 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) [2022-07-13 22:37:52,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 22:37:53,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 22:37:53,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:37:53,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 2654 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-13 22:37:53,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:37:53,259 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-13 22:37:53,260 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 22:37:53,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302716304] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:37:53,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 22:37:53,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 9 [2022-07-13 22:37:53,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849463339] [2022-07-13 22:37:53,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:37:53,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 22:37:53,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:37:53,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 22:37:53,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-13 22:37:53,262 INFO L87 Difference]: Start difference. First operand 130 states and 171 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-13 22:37:53,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 22:37:53,432 INFO L93 Difference]: Finished difference Result 221 states and 292 transitions. [2022-07-13 22:37:53,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 22:37:53,433 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 98 [2022-07-13 22:37:53,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 22:37:53,436 INFO L225 Difference]: With dead ends: 221 [2022-07-13 22:37:53,437 INFO L226 Difference]: Without dead ends: 127 [2022-07-13 22:37:53,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-07-13 22:37:53,439 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 80 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 895 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 22:37:53,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 895 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 22:37:53,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-13 22:37:53,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-07-13 22:37:53,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 82 states have (on average 1.1951219512195121) internal successors, (98), 83 states have internal predecessors, (98), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-07-13 22:37:53,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 165 transitions. [2022-07-13 22:37:53,449 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 165 transitions. Word has length 98 [2022-07-13 22:37:53,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 22:37:53,450 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 165 transitions. [2022-07-13 22:37:53,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-13 22:37:53,450 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 165 transitions. [2022-07-13 22:37:53,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-07-13 22:37:53,451 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 22:37:53,451 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 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] [2022-07-13 22:37:53,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 22:37:53,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:37:53,672 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 22:37:53,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:37:53,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1323939499, now seen corresponding path program 1 times [2022-07-13 22:37:53,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:37:53,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170619724] [2022-07-13 22:37:53,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:37:53,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:37:53,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:53,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 22:37:53,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:53,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 22:37:53,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:53,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 22:37:53,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:53,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 22:37:53,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:53,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 22:37:53,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:53,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 22:37:53,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:53,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-13 22:37:53,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:53,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-13 22:37:53,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:53,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-07-13 22:37:53,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:54,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-07-13 22:37:54,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:54,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-07-13 22:37:54,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:54,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-07-13 22:37:54,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:54,065 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-07-13 22:37:54,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:37:54,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170619724] [2022-07-13 22:37:54,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170619724] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:37:54,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:37:54,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-13 22:37:54,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623281691] [2022-07-13 22:37:54,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:37:54,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 22:37:54,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:37:54,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 22:37:54,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-13 22:37:54,067 INFO L87 Difference]: Start difference. First operand 127 states and 165 transitions. Second operand has 9 states, 8 states have (on average 5.375) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (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) [2022-07-13 22:37:54,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 22:37:54,612 INFO L93 Difference]: Finished difference Result 139 states and 182 transitions. [2022-07-13 22:37:54,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 22:37:54,612 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.375) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (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 110 [2022-07-13 22:37:54,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 22:37:54,614 INFO L225 Difference]: With dead ends: 139 [2022-07-13 22:37:54,614 INFO L226 Difference]: Without dead ends: 137 [2022-07-13 22:37:54,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-07-13 22:37:54,615 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 88 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 22:37:54,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 524 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 22:37:54,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-07-13 22:37:54,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2022-07-13 22:37:54,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 88 states have (on average 1.1818181818181819) internal successors, (104), 90 states have internal predecessors, (104), 35 states have call successors, (35), 11 states have call predecessors, (35), 12 states have return successors, (40), 34 states have call predecessors, (40), 34 states have call successors, (40) [2022-07-13 22:37:54,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 179 transitions. [2022-07-13 22:37:54,625 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 179 transitions. Word has length 110 [2022-07-13 22:37:54,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 22:37:54,626 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 179 transitions. [2022-07-13 22:37:54,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.375) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (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) [2022-07-13 22:37:54,626 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 179 transitions. [2022-07-13 22:37:54,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-07-13 22:37:54,627 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 22:37:54,628 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-13 22:37:54,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 22:37:54,628 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 22:37:54,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:37:54,629 INFO L85 PathProgramCache]: Analyzing trace with hash 2136545501, now seen corresponding path program 1 times [2022-07-13 22:37:54,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:37:54,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585537097] [2022-07-13 22:37:54,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:37:54,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:37:54,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:54,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 22:37:54,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:54,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 22:37:54,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:54,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 22:37:54,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:54,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 22:37:54,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:54,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 22:37:54,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:54,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 22:37:54,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:54,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-13 22:37:54,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:55,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-13 22:37:55,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:55,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-07-13 22:37:55,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:55,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-07-13 22:37:55,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:55,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-07-13 22:37:55,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:55,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-07-13 22:37:55,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:55,206 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 42 proven. 6 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-13 22:37:55,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:37:55,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585537097] [2022-07-13 22:37:55,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585537097] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:37:55,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805548411] [2022-07-13 22:37:55,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:37:55,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:37:55,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:37:55,212 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) [2022-07-13 22:37:55,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 22:37:55,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:37:55,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 2700 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 22:37:55,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:37:59,792 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-07-13 22:37:59,792 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 22:37:59,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805548411] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:37:59,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 22:37:59,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2022-07-13 22:37:59,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516745790] [2022-07-13 22:37:59,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:37:59,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 22:37:59,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:37:59,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 22:37:59,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=126, Unknown=2, NotChecked=0, Total=156 [2022-07-13 22:37:59,794 INFO L87 Difference]: Start difference. First operand 136 states and 179 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2022-07-13 22:37:59,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 22:37:59,961 INFO L93 Difference]: Finished difference Result 263 states and 361 transitions. [2022-07-13 22:37:59,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 22:37:59,962 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (14), 2 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 114 [2022-07-13 22:37:59,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 22:37:59,964 INFO L225 Difference]: With dead ends: 263 [2022-07-13 22:37:59,964 INFO L226 Difference]: Without dead ends: 152 [2022-07-13 22:37:59,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=34, Invalid=146, Unknown=2, NotChecked=0, Total=182 [2022-07-13 22:37:59,965 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 23 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 22:37:59,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 571 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2022-07-13 22:37:59,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-07-13 22:37:59,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 141. [2022-07-13 22:37:59,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 93 states have (on average 1.1935483870967742) internal successors, (111), 95 states have internal predecessors, (111), 35 states have call successors, (35), 11 states have call predecessors, (35), 12 states have return successors, (40), 34 states have call predecessors, (40), 34 states have call successors, (40) [2022-07-13 22:37:59,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 186 transitions. [2022-07-13 22:37:59,975 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 186 transitions. Word has length 114 [2022-07-13 22:37:59,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 22:37:59,976 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 186 transitions. [2022-07-13 22:37:59,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2022-07-13 22:37:59,976 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 186 transitions. [2022-07-13 22:37:59,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-07-13 22:37:59,977 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 22:37:59,977 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-13 22:38:00,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 22:38:00,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:38:00,199 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 22:38:00,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:38:00,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1900256357, now seen corresponding path program 1 times [2022-07-13 22:38:00,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:38:00,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443582213] [2022-07-13 22:38:00,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:38:00,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:38:00,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:00,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 22:38:00,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:00,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 22:38:00,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:00,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 22:38:00,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:00,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 22:38:00,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:00,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 22:38:00,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:00,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 22:38:00,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:00,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-13 22:38:00,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:00,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-13 22:38:00,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:00,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-07-13 22:38:00,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:00,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-07-13 22:38:00,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:00,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-07-13 22:38:00,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:00,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-07-13 22:38:00,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:00,730 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-07-13 22:38:00,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:38:00,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443582213] [2022-07-13 22:38:00,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443582213] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:38:00,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138879928] [2022-07-13 22:38:00,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:38:00,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:38:00,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:38:00,732 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) [2022-07-13 22:38:00,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 22:38:01,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:01,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 2695 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-13 22:38:01,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:38:01,331 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-13 22:38:01,611 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-07-13 22:38:01,611 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 22:38:01,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138879928] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:38:01,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 22:38:01,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [11] total 21 [2022-07-13 22:38:01,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736475033] [2022-07-13 22:38:01,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:38:01,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-13 22:38:01,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:38:01,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-13 22:38:01,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-07-13 22:38:01,613 INFO L87 Difference]: Start difference. First operand 141 states and 186 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 10 states have internal predecessors, (57), 5 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-07-13 22:38:01,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 22:38:01,727 INFO L93 Difference]: Finished difference Result 280 states and 371 transitions. [2022-07-13 22:38:01,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 22:38:01,728 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 10 states have internal predecessors, (57), 5 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 114 [2022-07-13 22:38:01,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 22:38:01,729 INFO L225 Difference]: With dead ends: 280 [2022-07-13 22:38:01,729 INFO L226 Difference]: Without dead ends: 160 [2022-07-13 22:38:01,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2022-07-13 22:38:01,731 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 32 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1020 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 22:38:01,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 1020 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 50 Invalid, 0 Unknown, 88 Unchecked, 0.1s Time] [2022-07-13 22:38:01,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-07-13 22:38:01,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2022-07-13 22:38:01,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 111 states have (on average 1.2072072072072073) internal successors, (134), 113 states have internal predecessors, (134), 35 states have call successors, (35), 12 states have call predecessors, (35), 13 states have return successors, (40), 34 states have call predecessors, (40), 34 states have call successors, (40) [2022-07-13 22:38:01,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 209 transitions. [2022-07-13 22:38:01,741 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 209 transitions. Word has length 114 [2022-07-13 22:38:01,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 22:38:01,741 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 209 transitions. [2022-07-13 22:38:01,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 10 states have internal predecessors, (57), 5 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-07-13 22:38:01,742 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 209 transitions. [2022-07-13 22:38:01,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-07-13 22:38:01,743 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 22:38:01,743 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 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] [2022-07-13 22:38:01,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 22:38:01,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:38:01,960 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 22:38:01,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:38:01,960 INFO L85 PathProgramCache]: Analyzing trace with hash -333498407, now seen corresponding path program 1 times [2022-07-13 22:38:01,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:38:01,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752390390] [2022-07-13 22:38:01,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:38:01,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:38:02,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:02,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 22:38:02,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:02,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 22:38:02,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:02,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 22:38:02,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:02,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 22:38:02,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:02,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 22:38:02,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:02,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 22:38:02,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:02,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-13 22:38:02,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:02,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-13 22:38:02,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:02,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-07-13 22:38:02,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:02,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-07-13 22:38:02,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:02,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-07-13 22:38:02,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:02,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-07-13 22:38:02,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:02,199 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-13 22:38:02,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:38:02,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752390390] [2022-07-13 22:38:02,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752390390] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:38:02,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930790327] [2022-07-13 22:38:02,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:38:02,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:38:02,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:38:02,202 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) [2022-07-13 22:38:02,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 22:38:02,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:02,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 2690 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 22:38:02,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:38:02,656 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-07-13 22:38:02,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 22:38:02,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930790327] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:38:02,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 22:38:02,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-07-13 22:38:02,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343605352] [2022-07-13 22:38:02,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:38:02,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 22:38:02,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:38:02,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 22:38:02,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 22:38:02,659 INFO L87 Difference]: Start difference. First operand 160 states and 209 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-07-13 22:38:02,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 22:38:02,682 INFO L93 Difference]: Finished difference Result 289 states and 389 transitions. [2022-07-13 22:38:02,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 22:38:02,682 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 114 [2022-07-13 22:38:02,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 22:38:02,684 INFO L225 Difference]: With dead ends: 289 [2022-07-13 22:38:02,684 INFO L226 Difference]: Without dead ends: 169 [2022-07-13 22:38:02,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 22:38:02,685 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 20 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 22:38:02,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 487 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 22:38:02,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-07-13 22:38:02,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 152. [2022-07-13 22:38:02,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 104 states have (on average 1.2019230769230769) internal successors, (125), 105 states have internal predecessors, (125), 35 states have call successors, (35), 12 states have call predecessors, (35), 12 states have return successors, (39), 34 states have call predecessors, (39), 34 states have call successors, (39) [2022-07-13 22:38:02,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 199 transitions. [2022-07-13 22:38:02,695 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 199 transitions. Word has length 114 [2022-07-13 22:38:02,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 22:38:02,696 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 199 transitions. [2022-07-13 22:38:02,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-07-13 22:38:02,696 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 199 transitions. [2022-07-13 22:38:02,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-07-13 22:38:02,697 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 22:38:02,697 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:38:02,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-13 22:38:02,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:38:02,907 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 22:38:02,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:38:02,907 INFO L85 PathProgramCache]: Analyzing trace with hash -320167147, now seen corresponding path program 2 times [2022-07-13 22:38:02,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:38:02,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307123139] [2022-07-13 22:38:02,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:38:02,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:38:03,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:03,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 22:38:03,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:03,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 22:38:03,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:03,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 22:38:03,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:03,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 22:38:03,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:03,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 22:38:03,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:03,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-13 22:38:03,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:03,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 22:38:03,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:03,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-13 22:38:03,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:03,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-07-13 22:38:03,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:03,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-07-13 22:38:03,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:03,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-07-13 22:38:03,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:03,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-07-13 22:38:03,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:03,280 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-13 22:38:03,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:38:03,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307123139] [2022-07-13 22:38:03,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307123139] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:38:03,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464009939] [2022-07-13 22:38:03,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 22:38:03,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:38:03,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:38:03,283 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) [2022-07-13 22:38:03,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 22:38:03,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 22:38:03,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:38:03,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 2702 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-13 22:38:03,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:38:04,581 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 85 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-07-13 22:38:04,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:38:05,033 INFO L356 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2022-07-13 22:38:05,033 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 [2022-07-13 22:38:05,042 INFO L356 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2022-07-13 22:38:05,042 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 24 treesize of output 12 [2022-07-13 22:38:05,085 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 44 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-07-13 22:38:05,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464009939] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:38:05,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:38:05,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 11] total 26 [2022-07-13 22:38:05,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122211511] [2022-07-13 22:38:05,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:38:05,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-13 22:38:05,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:38:05,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-13 22:38:05,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2022-07-13 22:38:05,088 INFO L87 Difference]: Start difference. First operand 152 states and 199 transitions. Second operand has 26 states, 25 states have (on average 4.28) internal successors, (107), 24 states have internal predecessors, (107), 4 states have call successors, (26), 4 states have call predecessors, (26), 7 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2022-07-13 22:38:07,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 22:38:07,387 INFO L93 Difference]: Finished difference Result 346 states and 468 transitions. [2022-07-13 22:38:07,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-13 22:38:07,388 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 4.28) internal successors, (107), 24 states have internal predecessors, (107), 4 states have call successors, (26), 4 states have call predecessors, (26), 7 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) Word has length 118 [2022-07-13 22:38:07,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 22:38:07,391 INFO L225 Difference]: With dead ends: 346 [2022-07-13 22:38:07,391 INFO L226 Difference]: Without dead ends: 226 [2022-07-13 22:38:07,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 245 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=442, Invalid=2750, Unknown=0, NotChecked=0, Total=3192 [2022-07-13 22:38:07,393 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 271 mSDsluCounter, 786 mSDsCounter, 0 mSdLazyCounter, 2019 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 930 SdHoareTripleChecker+Invalid, 2448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 2019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 350 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-13 22:38:07,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 930 Invalid, 2448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 2019 Invalid, 0 Unknown, 350 Unchecked, 1.3s Time] [2022-07-13 22:38:07,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-07-13 22:38:07,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 192. [2022-07-13 22:38:07,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 138 states have (on average 1.210144927536232) internal successors, (167), 140 states have internal predecessors, (167), 38 states have call successors, (38), 14 states have call predecessors, (38), 15 states have return successors, (48), 37 states have call predecessors, (48), 37 states have call successors, (48) [2022-07-13 22:38:07,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 253 transitions. [2022-07-13 22:38:07,405 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 253 transitions. Word has length 118 [2022-07-13 22:38:07,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 22:38:07,406 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 253 transitions. [2022-07-13 22:38:07,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 4.28) internal successors, (107), 24 states have internal predecessors, (107), 4 states have call successors, (26), 4 states have call predecessors, (26), 7 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2022-07-13 22:38:07,406 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 253 transitions. [2022-07-13 22:38:07,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-13 22:38:07,407 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 22:38:07,408 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:38:07,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 22:38:07,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:38:07,623 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 22:38:07,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:38:07,623 INFO L85 PathProgramCache]: Analyzing trace with hash -916454254, now seen corresponding path program 1 times [2022-07-13 22:38:07,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:38:07,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896628963] [2022-07-13 22:38:07,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:38:07,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:38:07,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:07,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 22:38:07,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:07,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 22:38:07,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:07,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 22:38:07,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:07,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 22:38:07,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:07,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 22:38:07,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:07,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 22:38:07,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:07,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-13 22:38:07,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:07,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-13 22:38:07,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:07,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-07-13 22:38:07,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:07,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-07-13 22:38:07,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:07,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-07-13 22:38:07,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:07,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-07-13 22:38:07,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:07,859 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-07-13 22:38:07,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:38:07,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896628963] [2022-07-13 22:38:07,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896628963] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:38:07,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704225669] [2022-07-13 22:38:07,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:38:07,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:38:07,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:38:07,861 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) [2022-07-13 22:38:07,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 22:38:08,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:08,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 2702 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 22:38:08,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:38:08,355 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-07-13 22:38:08,355 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 22:38:08,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704225669] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:38:08,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 22:38:08,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-07-13 22:38:08,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290569704] [2022-07-13 22:38:08,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:38:08,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 22:38:08,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:38:08,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 22:38:08,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 22:38:08,358 INFO L87 Difference]: Start difference. First operand 192 states and 253 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-07-13 22:38:08,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 22:38:08,386 INFO L93 Difference]: Finished difference Result 365 states and 490 transitions. [2022-07-13 22:38:08,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 22:38:08,386 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 120 [2022-07-13 22:38:08,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 22:38:08,388 INFO L225 Difference]: With dead ends: 365 [2022-07-13 22:38:08,388 INFO L226 Difference]: Without dead ends: 203 [2022-07-13 22:38:08,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 22:38:08,390 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 9 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 22:38:08,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 480 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 22:38:08,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-07-13 22:38:08,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 194. [2022-07-13 22:38:08,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 140 states have (on average 1.1928571428571428) internal successors, (167), 142 states have internal predecessors, (167), 38 states have call successors, (38), 14 states have call predecessors, (38), 15 states have return successors, (48), 37 states have call predecessors, (48), 37 states have call successors, (48) [2022-07-13 22:38:08,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 253 transitions. [2022-07-13 22:38:08,406 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 253 transitions. Word has length 120 [2022-07-13 22:38:08,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 22:38:08,407 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 253 transitions. [2022-07-13 22:38:08,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-07-13 22:38:08,408 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 253 transitions. [2022-07-13 22:38:08,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-13 22:38:08,409 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 22:38:08,409 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 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] [2022-07-13 22:38:08,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-13 22:38:08,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-13 22:38:08,635 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 22:38:08,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:38:08,636 INFO L85 PathProgramCache]: Analyzing trace with hash -915873842, now seen corresponding path program 1 times [2022-07-13 22:38:08,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:38:08,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462545335] [2022-07-13 22:38:08,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:38:08,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:38:08,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:08,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 22:38:08,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:08,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 22:38:08,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:08,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 22:38:08,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:08,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 22:38:08,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:08,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 22:38:08,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:08,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 22:38:08,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:08,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-13 22:38:08,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:08,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-13 22:38:08,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:08,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-07-13 22:38:08,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:08,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-07-13 22:38:08,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:08,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-07-13 22:38:08,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:08,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-07-13 22:38:08,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:08,844 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-13 22:38:08,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:38:08,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462545335] [2022-07-13 22:38:08,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462545335] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:38:08,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410781638] [2022-07-13 22:38:08,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:38:08,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:38:08,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:38:08,846 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) [2022-07-13 22:38:08,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 22:38:09,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:09,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 2704 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 22:38:09,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:38:09,355 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-07-13 22:38:09,355 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 22:38:09,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410781638] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:38:09,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 22:38:09,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-07-13 22:38:09,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077015167] [2022-07-13 22:38:09,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:38:09,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 22:38:09,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:38:09,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 22:38:09,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 22:38:09,357 INFO L87 Difference]: Start difference. First operand 194 states and 253 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-07-13 22:38:09,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 22:38:09,381 INFO L93 Difference]: Finished difference Result 372 states and 502 transitions. [2022-07-13 22:38:09,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 22:38:09,382 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 120 [2022-07-13 22:38:09,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 22:38:09,383 INFO L225 Difference]: With dead ends: 372 [2022-07-13 22:38:09,384 INFO L226 Difference]: Without dead ends: 208 [2022-07-13 22:38:09,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 22:38:09,385 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 34 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 22:38:09,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 478 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 22:38:09,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-07-13 22:38:09,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 190. [2022-07-13 22:38:09,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 136 states have (on average 1.1691176470588236) internal successors, (159), 138 states have internal predecessors, (159), 38 states have call successors, (38), 14 states have call predecessors, (38), 15 states have return successors, (48), 37 states have call predecessors, (48), 37 states have call successors, (48) [2022-07-13 22:38:09,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 245 transitions. [2022-07-13 22:38:09,401 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 245 transitions. Word has length 120 [2022-07-13 22:38:09,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 22:38:09,401 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 245 transitions. [2022-07-13 22:38:09,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-07-13 22:38:09,401 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 245 transitions. [2022-07-13 22:38:09,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-13 22:38:09,402 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 22:38:09,403 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:38:09,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-13 22:38:09,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:38:09,627 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 22:38:09,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:38:09,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1910567540, now seen corresponding path program 2 times [2022-07-13 22:38:09,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:38:09,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630358741] [2022-07-13 22:38:09,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:38:09,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:38:09,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:09,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 22:38:09,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:09,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 22:38:09,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:09,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 22:38:09,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:09,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 22:38:09,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:09,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 22:38:09,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:09,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 22:38:09,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:09,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-13 22:38:09,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:09,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-13 22:38:09,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:09,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-07-13 22:38:09,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:10,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-07-13 22:38:10,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:10,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-07-13 22:38:10,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:10,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-07-13 22:38:10,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:10,149 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 44 proven. 8 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-13 22:38:10,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:38:10,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630358741] [2022-07-13 22:38:10,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630358741] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:38:10,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843244936] [2022-07-13 22:38:10,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 22:38:10,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:38:10,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:38:10,152 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) [2022-07-13 22:38:10,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-13 22:38:10,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 22:38:10,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:38:10,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 2699 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-13 22:38:10,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:38:11,456 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 83 proven. 6 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-07-13 22:38:11,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:38:11,722 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 [2022-07-13 22:38:11,816 INFO L356 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-07-13 22:38:11,816 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 [2022-07-13 22:38:11,848 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 44 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-07-13 22:38:11,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843244936] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:38:11,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:38:11,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 24 [2022-07-13 22:38:11,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728947666] [2022-07-13 22:38:11,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:38:11,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-13 22:38:11,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:38:11,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-13 22:38:11,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-07-13 22:38:11,850 INFO L87 Difference]: Start difference. First operand 190 states and 245 transitions. Second operand has 24 states, 24 states have (on average 4.208333333333333) internal successors, (101), 23 states have internal predecessors, (101), 3 states have call successors, (18), 4 states have call predecessors, (18), 5 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-07-13 22:38:13,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 22:38:13,538 INFO L93 Difference]: Finished difference Result 339 states and 433 transitions. [2022-07-13 22:38:13,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-13 22:38:13,539 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.208333333333333) internal successors, (101), 23 states have internal predecessors, (101), 3 states have call successors, (18), 4 states have call predecessors, (18), 5 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 120 [2022-07-13 22:38:13,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 22:38:13,541 INFO L225 Difference]: With dead ends: 339 [2022-07-13 22:38:13,541 INFO L226 Difference]: Without dead ends: 244 [2022-07-13 22:38:13,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 247 SyntacticMatches, 14 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=314, Invalid=1168, Unknown=0, NotChecked=0, Total=1482 [2022-07-13 22:38:13,543 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 322 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 1241 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 1533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-13 22:38:13,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 579 Invalid, 1533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1241 Invalid, 0 Unknown, 222 Unchecked, 1.0s Time] [2022-07-13 22:38:13,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-07-13 22:38:13,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 225. [2022-07-13 22:38:13,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 165 states have (on average 1.1696969696969697) internal successors, (193), 168 states have internal predecessors, (193), 41 states have call successors, (41), 16 states have call predecessors, (41), 18 states have return successors, (58), 40 states have call predecessors, (58), 40 states have call successors, (58) [2022-07-13 22:38:13,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 292 transitions. [2022-07-13 22:38:13,555 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 292 transitions. Word has length 120 [2022-07-13 22:38:13,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 22:38:13,555 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 292 transitions. [2022-07-13 22:38:13,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.208333333333333) internal successors, (101), 23 states have internal predecessors, (101), 3 states have call successors, (18), 4 states have call predecessors, (18), 5 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-07-13 22:38:13,556 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 292 transitions. [2022-07-13 22:38:13,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-13 22:38:13,557 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 22:38:13,557 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-13 22:38:13,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-13 22:38:13,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-13 22:38:13,771 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 22:38:13,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:38:13,772 INFO L85 PathProgramCache]: Analyzing trace with hash 537886416, now seen corresponding path program 1 times [2022-07-13 22:38:13,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:38:13,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313532723] [2022-07-13 22:38:13,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:38:13,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:38:13,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:13,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 22:38:13,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:14,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 22:38:14,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:14,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 22:38:14,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:14,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 22:38:14,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:14,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 22:38:14,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:14,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 22:38:14,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:14,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-13 22:38:14,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:14,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-13 22:38:14,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:14,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-07-13 22:38:14,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:14,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-07-13 22:38:14,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:14,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-07-13 22:38:14,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:14,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-07-13 22:38:14,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:14,252 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 44 proven. 8 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-13 22:38:14,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:38:14,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313532723] [2022-07-13 22:38:14,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313532723] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:38:14,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822047866] [2022-07-13 22:38:14,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:38:14,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:38:14,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:38:14,254 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) [2022-07-13 22:38:14,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-13 22:38:14,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:14,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 2701 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-13 22:38:14,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:38:14,846 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-13 22:38:15,034 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-13 22:38:15,035 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 17 treesize of output 23 [2022-07-13 22:38:15,039 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 8 treesize of output 4 [2022-07-13 22:38:15,101 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-13 22:38:15,102 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 21 treesize of output 27 [2022-07-13 22:38:15,115 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 8 treesize of output 4 [2022-07-13 22:38:15,423 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 9 treesize of output 3 [2022-07-13 22:38:15,937 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 55 proven. 58 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-13 22:38:15,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:38:16,472 INFO L356 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2022-07-13 22:38:16,473 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 24 treesize of output 19 [2022-07-13 22:38:16,539 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 44 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-07-13 22:38:16,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822047866] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:38:16,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:38:16,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 23, 12] total 41 [2022-07-13 22:38:16,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583560632] [2022-07-13 22:38:16,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:38:16,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-13 22:38:16,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:38:16,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-13 22:38:16,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1494, Unknown=0, NotChecked=0, Total=1640 [2022-07-13 22:38:16,541 INFO L87 Difference]: Start difference. First operand 225 states and 292 transitions. Second operand has 41 states, 39 states have (on average 4.17948717948718) internal successors, (163), 38 states have internal predecessors, (163), 11 states have call successors, (30), 6 states have call predecessors, (30), 10 states have return successors, (27), 10 states have call predecessors, (27), 9 states have call successors, (27) [2022-07-13 22:38:21,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 22:38:21,933 INFO L93 Difference]: Finished difference Result 564 states and 773 transitions. [2022-07-13 22:38:21,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-07-13 22:38:21,933 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 4.17948717948718) internal successors, (163), 38 states have internal predecessors, (163), 11 states have call successors, (30), 6 states have call predecessors, (30), 10 states have return successors, (27), 10 states have call predecessors, (27), 9 states have call successors, (27) Word has length 120 [2022-07-13 22:38:21,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 22:38:21,936 INFO L225 Difference]: With dead ends: 564 [2022-07-13 22:38:21,936 INFO L226 Difference]: Without dead ends: 385 [2022-07-13 22:38:21,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 248 SyntacticMatches, 8 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2652 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=959, Invalid=8941, Unknown=0, NotChecked=0, Total=9900 [2022-07-13 22:38:21,939 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 479 mSDsluCounter, 1309 mSDsCounter, 0 mSdLazyCounter, 4462 mSolverCounterSat, 382 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 1487 SdHoareTripleChecker+Invalid, 6158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 382 IncrementalHoareTripleChecker+Valid, 4462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1314 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-13 22:38:21,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [508 Valid, 1487 Invalid, 6158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [382 Valid, 4462 Invalid, 0 Unknown, 1314 Unchecked, 3.1s Time] [2022-07-13 22:38:21,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-07-13 22:38:21,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 295. [2022-07-13 22:38:21,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 204 states have (on average 1.1568627450980393) internal successors, (236), 206 states have internal predecessors, (236), 67 states have call successors, (67), 22 states have call predecessors, (67), 23 states have return successors, (100), 66 states have call predecessors, (100), 66 states have call successors, (100) [2022-07-13 22:38:21,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 403 transitions. [2022-07-13 22:38:21,960 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 403 transitions. Word has length 120 [2022-07-13 22:38:21,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 22:38:21,961 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 403 transitions. [2022-07-13 22:38:21,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 4.17948717948718) internal successors, (163), 38 states have internal predecessors, (163), 11 states have call successors, (30), 6 states have call predecessors, (30), 10 states have return successors, (27), 10 states have call predecessors, (27), 9 states have call successors, (27) [2022-07-13 22:38:21,961 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 403 transitions. [2022-07-13 22:38:21,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-13 22:38:21,963 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 22:38:21,963 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:38:21,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-13 22:38:22,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-13 22:38:22,175 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 22:38:22,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:38:22,176 INFO L85 PathProgramCache]: Analyzing trace with hash 190117968, now seen corresponding path program 3 times [2022-07-13 22:38:22,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:38:22,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332127027] [2022-07-13 22:38:22,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:38:22,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:38:22,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:22,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 22:38:22,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:22,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 22:38:22,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:22,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 22:38:22,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:22,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 22:38:22,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:22,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 22:38:22,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:22,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 22:38:22,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:22,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-13 22:38:22,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:22,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-13 22:38:22,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:22,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-07-13 22:38:22,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:22,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-07-13 22:38:22,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:22,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-13 22:38:22,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:22,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-07-13 22:38:22,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:22,496 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-07-13 22:38:22,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:38:22,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332127027] [2022-07-13 22:38:22,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332127027] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:38:22,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983757695] [2022-07-13 22:38:22,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 22:38:22,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:38:22,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:38:22,499 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) [2022-07-13 22:38:22,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-13 22:38:23,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-13 22:38:23,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:38:23,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 2425 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-13 22:38:23,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:38:23,671 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-07-13 22:38:23,671 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 22:38:23,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983757695] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:38:23,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 22:38:23,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [10] total 19 [2022-07-13 22:38:23,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245850009] [2022-07-13 22:38:23,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:38:23,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 22:38:23,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:38:23,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 22:38:23,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2022-07-13 22:38:23,675 INFO L87 Difference]: Start difference. First operand 295 states and 403 transitions. Second operand has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 9 states have internal predecessors, (64), 4 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-07-13 22:38:23,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 22:38:23,959 INFO L93 Difference]: Finished difference Result 481 states and 654 transitions. [2022-07-13 22:38:23,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 22:38:23,960 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 9 states have internal predecessors, (64), 4 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 124 [2022-07-13 22:38:23,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 22:38:23,962 INFO L225 Difference]: With dead ends: 481 [2022-07-13 22:38:23,962 INFO L226 Difference]: Without dead ends: 323 [2022-07-13 22:38:23,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2022-07-13 22:38:23,964 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 36 mSDsluCounter, 1139 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 1316 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 22:38:23,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 1316 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 90 Invalid, 0 Unknown, 167 Unchecked, 0.1s Time] [2022-07-13 22:38:23,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-07-13 22:38:23,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 311. [2022-07-13 22:38:23,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 216 states have (on average 1.1342592592592593) internal successors, (245), 220 states have internal predecessors, (245), 71 states have call successors, (71), 24 states have call predecessors, (71), 23 states have return successors, (106), 66 states have call predecessors, (106), 70 states have call successors, (106) [2022-07-13 22:38:23,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 422 transitions. [2022-07-13 22:38:23,984 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 422 transitions. Word has length 124 [2022-07-13 22:38:23,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 22:38:23,984 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 422 transitions. [2022-07-13 22:38:23,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 9 states have internal predecessors, (64), 4 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-07-13 22:38:23,984 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 422 transitions. [2022-07-13 22:38:23,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-13 22:38:23,986 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 22:38:23,987 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:38:24,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-13 22:38:24,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-13 22:38:24,199 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 22:38:24,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:38:24,200 INFO L85 PathProgramCache]: Analyzing trace with hash 408972686, now seen corresponding path program 1 times [2022-07-13 22:38:24,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:38:24,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364533984] [2022-07-13 22:38:24,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:38:24,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:38:24,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:24,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 22:38:24,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:24,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 22:38:24,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:24,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 22:38:24,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:24,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 22:38:24,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:24,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 22:38:24,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:24,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 22:38:24,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:24,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-13 22:38:24,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:24,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-13 22:38:24,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:24,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-07-13 22:38:24,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:24,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-07-13 22:38:24,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:24,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-13 22:38:24,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:24,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-07-13 22:38:24,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:24,497 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-07-13 22:38:24,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:38:24,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364533984] [2022-07-13 22:38:24,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364533984] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:38:24,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639131069] [2022-07-13 22:38:24,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:38:24,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:38:24,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:38:24,500 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) [2022-07-13 22:38:24,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-13 22:38:24,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:24,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 2716 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-13 22:38:24,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:38:25,041 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-13 22:38:25,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 22:38:25,206 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-07-13 22:38:25,430 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-13 22:38:25,430 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 22:38:25,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639131069] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:38:25,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 22:38:25,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [10] total 21 [2022-07-13 22:38:25,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582177920] [2022-07-13 22:38:25,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:38:25,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-13 22:38:25,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:38:25,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-13 22:38:25,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2022-07-13 22:38:25,432 INFO L87 Difference]: Start difference. First operand 311 states and 422 transitions. Second operand has 13 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 6 states have call successors, (14), 3 states have call predecessors, (14), 5 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-13 22:38:25,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 22:38:25,637 INFO L93 Difference]: Finished difference Result 573 states and 764 transitions. [2022-07-13 22:38:25,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 22:38:25,639 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 6 states have call successors, (14), 3 states have call predecessors, (14), 5 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 124 [2022-07-13 22:38:25,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 22:38:25,642 INFO L225 Difference]: With dead ends: 573 [2022-07-13 22:38:25,642 INFO L226 Difference]: Without dead ends: 382 [2022-07-13 22:38:25,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 133 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-07-13 22:38:25,645 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 47 mSDsluCounter, 1573 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 1771 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 176 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 22:38:25,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 1771 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 136 Invalid, 0 Unknown, 176 Unchecked, 0.1s Time] [2022-07-13 22:38:25,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-07-13 22:38:25,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 337. [2022-07-13 22:38:25,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 240 states have (on average 1.1416666666666666) internal successors, (274), 245 states have internal predecessors, (274), 72 states have call successors, (72), 25 states have call predecessors, (72), 24 states have return successors, (108), 66 states have call predecessors, (108), 71 states have call successors, (108) [2022-07-13 22:38:25,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 454 transitions. [2022-07-13 22:38:25,667 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 454 transitions. Word has length 124 [2022-07-13 22:38:25,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 22:38:25,667 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 454 transitions. [2022-07-13 22:38:25,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 6 states have call successors, (14), 3 states have call predecessors, (14), 5 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-13 22:38:25,667 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 454 transitions. [2022-07-13 22:38:25,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-13 22:38:25,669 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 22:38:25,670 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:38:25,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-13 22:38:25,895 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,SelfDestructingSolverStorable14 [2022-07-13 22:38:25,895 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 22:38:25,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:38:25,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1549602100, now seen corresponding path program 1 times [2022-07-13 22:38:25,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:38:25,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611776591] [2022-07-13 22:38:25,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:38:25,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:38:26,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:26,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 22:38:26,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:26,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 22:38:26,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:26,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 22:38:26,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:26,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 22:38:26,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:26,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 22:38:26,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:26,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 22:38:26,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:26,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-13 22:38:26,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:26,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-13 22:38:26,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:26,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-07-13 22:38:26,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:26,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-07-13 22:38:26,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:26,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-13 22:38:26,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:26,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-07-13 22:38:26,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:26,197 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-07-13 22:38:26,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:38:26,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611776591] [2022-07-13 22:38:26,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611776591] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:38:26,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159206962] [2022-07-13 22:38:26,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:38:26,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:38:26,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:38:26,204 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) [2022-07-13 22:38:26,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-13 22:38:26,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:26,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 2721 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-13 22:38:26,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:38:26,837 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-13 22:38:27,304 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-13 22:38:27,304 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 29 treesize of output 13 [2022-07-13 22:38:27,308 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-07-13 22:38:27,354 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-07-13 22:38:27,354 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 22:38:27,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159206962] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:38:27,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 22:38:27,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [10] total 23 [2022-07-13 22:38:27,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609639869] [2022-07-13 22:38:27,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:38:27,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-13 22:38:27,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:38:27,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-13 22:38:27,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-07-13 22:38:27,356 INFO L87 Difference]: Start difference. First operand 337 states and 454 transitions. Second operand has 15 states, 15 states have (on average 4.4) internal successors, (66), 11 states have internal predecessors, (66), 6 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-13 22:38:27,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 22:38:27,492 INFO L93 Difference]: Finished difference Result 587 states and 790 transitions. [2022-07-13 22:38:27,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-13 22:38:27,493 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 11 states have internal predecessors, (66), 6 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 124 [2022-07-13 22:38:27,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 22:38:27,495 INFO L225 Difference]: With dead ends: 587 [2022-07-13 22:38:27,495 INFO L226 Difference]: Without dead ends: 408 [2022-07-13 22:38:27,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-07-13 22:38:27,497 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 59 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1160 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 210 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 22:38:27,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 1160 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 210 Unchecked, 0.1s Time] [2022-07-13 22:38:27,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-07-13 22:38:27,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 375. [2022-07-13 22:38:27,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 270 states have (on average 1.1296296296296295) internal successors, (305), 275 states have internal predecessors, (305), 76 states have call successors, (76), 29 states have call predecessors, (76), 28 states have return successors, (113), 70 states have call predecessors, (113), 75 states have call successors, (113) [2022-07-13 22:38:27,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 494 transitions. [2022-07-13 22:38:27,522 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 494 transitions. Word has length 124 [2022-07-13 22:38:27,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 22:38:27,522 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 494 transitions. [2022-07-13 22:38:27,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 11 states have internal predecessors, (66), 6 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-13 22:38:27,523 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 494 transitions. [2022-07-13 22:38:27,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-07-13 22:38:27,525 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 22:38:27,525 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:38:27,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-13 22:38:27,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:38:27,739 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 22:38:27,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:38:27,740 INFO L85 PathProgramCache]: Analyzing trace with hash -120279672, now seen corresponding path program 1 times [2022-07-13 22:38:27,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:38:27,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628158760] [2022-07-13 22:38:27,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:38:27,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:38:27,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:27,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 22:38:27,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:27,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 22:38:27,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:27,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 22:38:27,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:27,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 22:38:27,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:27,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 22:38:27,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:27,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 22:38:27,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:27,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-13 22:38:27,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:28,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-13 22:38:28,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:28,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-13 22:38:28,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:28,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-07-13 22:38:28,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:28,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-07-13 22:38:28,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:28,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-07-13 22:38:28,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:28,057 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-07-13 22:38:28,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:38:28,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628158760] [2022-07-13 22:38:28,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628158760] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:38:28,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426578739] [2022-07-13 22:38:28,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:38:28,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:38:28,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:38:28,060 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) [2022-07-13 22:38:28,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-13 22:38:28,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:28,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 2723 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-13 22:38:28,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:38:28,535 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-13 22:38:28,535 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 22:38:28,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426578739] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:38:28,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 22:38:28,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 11 [2022-07-13 22:38:28,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309210697] [2022-07-13 22:38:28,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:38:28,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 22:38:28,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:38:28,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 22:38:28,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-07-13 22:38:28,537 INFO L87 Difference]: Start difference. First operand 375 states and 494 transitions. Second operand has 9 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-07-13 22:38:28,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 22:38:28,686 INFO L93 Difference]: Finished difference Result 628 states and 851 transitions. [2022-07-13 22:38:28,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 22:38:28,687 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 128 [2022-07-13 22:38:28,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 22:38:28,689 INFO L225 Difference]: With dead ends: 628 [2022-07-13 22:38:28,689 INFO L226 Difference]: Without dead ends: 373 [2022-07-13 22:38:28,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-07-13 22:38:28,691 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 12 mSDsluCounter, 1051 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1210 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 22:38:28,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 1210 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 22:38:28,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-07-13 22:38:28,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 373. [2022-07-13 22:38:28,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 267 states have (on average 1.1161048689138577) internal successors, (298), 273 states have internal predecessors, (298), 76 states have call successors, (76), 29 states have call predecessors, (76), 29 states have return successors, (118), 70 states have call predecessors, (118), 75 states have call successors, (118) [2022-07-13 22:38:28,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 492 transitions. [2022-07-13 22:38:28,714 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 492 transitions. Word has length 128 [2022-07-13 22:38:28,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 22:38:28,714 INFO L495 AbstractCegarLoop]: Abstraction has 373 states and 492 transitions. [2022-07-13 22:38:28,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-07-13 22:38:28,714 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 492 transitions. [2022-07-13 22:38:28,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-07-13 22:38:28,716 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 22:38:28,717 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:38:28,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-13 22:38:28,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-13 22:38:28,939 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 22:38:28,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:38:28,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1836872170, now seen corresponding path program 1 times [2022-07-13 22:38:28,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:38:28,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172557687] [2022-07-13 22:38:28,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:38:28,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:38:29,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:29,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 22:38:29,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:29,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 22:38:29,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:29,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-13 22:38:29,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:29,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-13 22:38:29,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:29,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 22:38:29,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:29,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-13 22:38:29,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:29,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-13 22:38:29,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:29,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-13 22:38:29,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:29,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-13 22:38:29,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:29,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-13 22:38:29,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:29,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-13 22:38:29,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:29,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-07-13 22:38:29,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:29,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-07-13 22:38:29,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:29,263 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-07-13 22:38:29,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:38:29,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172557687] [2022-07-13 22:38:29,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172557687] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:38:29,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942007781] [2022-07-13 22:38:29,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:38:29,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:38:29,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:38:29,266 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) [2022-07-13 22:38:29,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-13 22:38:29,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:29,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 2734 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-13 22:38:29,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:38:29,923 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 [2022-07-13 22:38:29,929 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-13 22:38:30,412 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-13 22:38:30,413 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 29 treesize of output 13 [2022-07-13 22:38:30,419 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-07-13 22:38:30,454 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-07-13 22:38:30,454 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 22:38:30,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942007781] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:38:30,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 22:38:30,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [10] total 23 [2022-07-13 22:38:30,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626395412] [2022-07-13 22:38:30,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:38:30,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-13 22:38:30,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:38:30,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-13 22:38:30,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-07-13 22:38:30,457 INFO L87 Difference]: Start difference. First operand 373 states and 492 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 11 states have internal predecessors, (69), 6 states have call successors, (15), 4 states have call predecessors, (15), 5 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2022-07-13 22:38:31,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 22:38:31,020 INFO L93 Difference]: Finished difference Result 588 states and 786 transitions. [2022-07-13 22:38:31,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-13 22:38:31,021 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 11 states have internal predecessors, (69), 6 states have call successors, (15), 4 states have call predecessors, (15), 5 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) Word has length 129 [2022-07-13 22:38:31,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 22:38:31,024 INFO L225 Difference]: With dead ends: 588 [2022-07-13 22:38:31,024 INFO L226 Difference]: Without dead ends: 404 [2022-07-13 22:38:31,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2022-07-13 22:38:31,026 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 273 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 1022 SdHoareTripleChecker+Invalid, 1236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 588 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 22:38:31,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 1022 Invalid, 1236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 544 Invalid, 0 Unknown, 588 Unchecked, 0.4s Time] [2022-07-13 22:38:31,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-07-13 22:38:31,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 350. [2022-07-13 22:38:31,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 247 states have (on average 1.1174089068825912) internal successors, (276), 254 states have internal predecessors, (276), 74 states have call successors, (74), 28 states have call predecessors, (74), 28 states have return successors, (115), 67 states have call predecessors, (115), 73 states have call successors, (115) [2022-07-13 22:38:31,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 465 transitions. [2022-07-13 22:38:31,052 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 465 transitions. Word has length 129 [2022-07-13 22:38:31,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 22:38:31,052 INFO L495 AbstractCegarLoop]: Abstraction has 350 states and 465 transitions. [2022-07-13 22:38:31,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 11 states have internal predecessors, (69), 6 states have call successors, (15), 4 states have call predecessors, (15), 5 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2022-07-13 22:38:31,053 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 465 transitions. [2022-07-13 22:38:31,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-07-13 22:38:31,055 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 22:38:31,055 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:38:31,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-13 22:38:31,271 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,SelfDestructingSolverStorable17 [2022-07-13 22:38:31,272 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 22:38:31,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:38:31,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1352348209, now seen corresponding path program 1 times [2022-07-13 22:38:31,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:38:31,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494090335] [2022-07-13 22:38:31,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:38:31,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:38:31,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:31,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 22:38:31,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:31,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 22:38:31,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:31,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 22:38:31,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:31,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 22:38:31,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:31,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 22:38:31,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:31,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 22:38:31,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:31,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-13 22:38:31,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:31,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-13 22:38:31,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:31,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-07-13 22:38:31,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:31,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-07-13 22:38:31,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:31,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-07-13 22:38:31,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:31,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-13 22:38:31,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:31,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-13 22:38:31,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:31,583 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 24 proven. 8 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-07-13 22:38:31,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:38:31,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494090335] [2022-07-13 22:38:31,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494090335] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:38:31,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111594089] [2022-07-13 22:38:31,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:38:31,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:38:31,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:38:31,588 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) [2022-07-13 22:38:31,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-13 22:38:32,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:32,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 2761 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-13 22:38:32,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:38:32,164 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 [2022-07-13 22:38:32,352 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-13 22:38:32,352 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 28 treesize of output 12 [2022-07-13 22:38:32,373 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-07-13 22:38:32,374 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 22:38:32,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111594089] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:38:32,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 22:38:32,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 18 [2022-07-13 22:38:32,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553809833] [2022-07-13 22:38:32,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:38:32,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 22:38:32,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:38:32,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 22:38:32,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2022-07-13 22:38:32,375 INFO L87 Difference]: Start difference. First operand 350 states and 465 transitions. Second operand has 10 states, 10 states have (on average 6.8) internal successors, (68), 9 states have internal predecessors, (68), 5 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-07-13 22:38:32,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 22:38:32,674 INFO L93 Difference]: Finished difference Result 572 states and 773 transitions. [2022-07-13 22:38:32,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 22:38:32,674 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.8) internal successors, (68), 9 states have internal predecessors, (68), 5 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 131 [2022-07-13 22:38:32,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 22:38:32,677 INFO L225 Difference]: With dead ends: 572 [2022-07-13 22:38:32,677 INFO L226 Difference]: Without dead ends: 375 [2022-07-13 22:38:32,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-07-13 22:38:32,678 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 52 mSDsluCounter, 814 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 971 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 22:38:32,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 971 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 197 Invalid, 0 Unknown, 43 Unchecked, 0.2s Time] [2022-07-13 22:38:32,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-07-13 22:38:32,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 351. [2022-07-13 22:38:32,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 249 states have (on average 1.1124497991967872) internal successors, (277), 256 states have internal predecessors, (277), 72 states have call successors, (72), 28 states have call predecessors, (72), 29 states have return successors, (122), 66 states have call predecessors, (122), 71 states have call successors, (122) [2022-07-13 22:38:32,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 471 transitions. [2022-07-13 22:38:32,701 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 471 transitions. Word has length 131 [2022-07-13 22:38:32,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 22:38:32,702 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 471 transitions. [2022-07-13 22:38:32,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.8) internal successors, (68), 9 states have internal predecessors, (68), 5 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-07-13 22:38:32,702 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 471 transitions. [2022-07-13 22:38:32,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-07-13 22:38:32,704 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 22:38:32,704 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:38:32,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-13 22:38:32,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:38:32,923 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 22:38:32,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:38:32,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1021256771, now seen corresponding path program 2 times [2022-07-13 22:38:32,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:38:32,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186828202] [2022-07-13 22:38:32,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:38:32,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:38:33,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:33,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 22:38:33,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:33,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 22:38:33,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:33,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 22:38:33,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:33,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 22:38:33,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:33,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 22:38:33,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:33,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 22:38:33,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:33,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-13 22:38:33,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:33,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-13 22:38:33,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:33,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-07-13 22:38:33,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:33,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-13 22:38:33,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:33,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-07-13 22:38:33,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:33,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-07-13 22:38:33,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:33,219 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-07-13 22:38:33,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:38:33,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186828202] [2022-07-13 22:38:33,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186828202] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:38:33,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915553237] [2022-07-13 22:38:33,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 22:38:33,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:38:33,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:38:33,221 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) [2022-07-13 22:38:33,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-13 22:38:33,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 22:38:33,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:38:33,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 2725 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-13 22:38:33,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:38:34,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 22:38:34,039 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 24 treesize of output 23 [2022-07-13 22:38:34,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 22:38:34,449 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 24 treesize of output 23 [2022-07-13 22:38:35,021 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 67 proven. 53 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-13 22:38:35,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:38:36,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915553237] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:38:36,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 22:38:36,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 18] total 26 [2022-07-13 22:38:36,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966844243] [2022-07-13 22:38:36,395 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 22:38:36,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-13 22:38:36,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:38:36,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-13 22:38:36,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=950, Unknown=1, NotChecked=0, Total=1056 [2022-07-13 22:38:36,396 INFO L87 Difference]: Start difference. First operand 351 states and 471 transitions. Second operand has 26 states, 24 states have (on average 5.708333333333333) internal successors, (137), 23 states have internal predecessors, (137), 8 states have call successors, (26), 5 states have call predecessors, (26), 7 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2022-07-13 22:38:38,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 22:38:38,691 INFO L93 Difference]: Finished difference Result 616 states and 816 transitions. [2022-07-13 22:38:38,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-13 22:38:38,692 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 5.708333333333333) internal successors, (137), 23 states have internal predecessors, (137), 8 states have call successors, (26), 5 states have call predecessors, (26), 7 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) Word has length 130 [2022-07-13 22:38:38,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 22:38:38,694 INFO L225 Difference]: With dead ends: 616 [2022-07-13 22:38:38,694 INFO L226 Difference]: Without dead ends: 363 [2022-07-13 22:38:38,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 179 SyntacticMatches, 14 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1100 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=489, Invalid=4066, Unknown=1, NotChecked=0, Total=4556 [2022-07-13 22:38:38,697 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 184 mSDsluCounter, 1505 mSDsCounter, 0 mSdLazyCounter, 2211 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1701 SdHoareTripleChecker+Invalid, 3477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 2211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1211 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-13 22:38:38,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1701 Invalid, 3477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 2211 Invalid, 0 Unknown, 1211 Unchecked, 1.2s Time] [2022-07-13 22:38:38,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-07-13 22:38:38,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 326. [2022-07-13 22:38:38,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 240 states have (on average 1.1041666666666667) internal successors, (265), 247 states have internal predecessors, (265), 56 states have call successors, (56), 25 states have call predecessors, (56), 29 states have return successors, (78), 53 states have call predecessors, (78), 55 states have call successors, (78) [2022-07-13 22:38:38,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 399 transitions. [2022-07-13 22:38:38,717 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 399 transitions. Word has length 130 [2022-07-13 22:38:38,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 22:38:38,718 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 399 transitions. [2022-07-13 22:38:38,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 5.708333333333333) internal successors, (137), 23 states have internal predecessors, (137), 8 states have call successors, (26), 5 states have call predecessors, (26), 7 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2022-07-13 22:38:38,718 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 399 transitions. [2022-07-13 22:38:38,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-07-13 22:38:38,720 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 22:38:38,720 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:38:38,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-13 22:38:38,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:38:38,935 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 22:38:38,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:38:38,936 INFO L85 PathProgramCache]: Analyzing trace with hash -78510352, now seen corresponding path program 1 times [2022-07-13 22:38:38,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:38:38,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597856174] [2022-07-13 22:38:38,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:38:38,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:38:39,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:39,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 22:38:39,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:39,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 22:38:39,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:39,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 22:38:39,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:39,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 22:38:39,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:39,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 22:38:39,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:39,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 22:38:39,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:39,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-13 22:38:39,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:39,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-13 22:38:39,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:39,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-07-13 22:38:39,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:39,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-07-13 22:38:39,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:39,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-07-13 22:38:39,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:39,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-07-13 22:38:39,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:39,344 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 32 proven. 14 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-07-13 22:38:39,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:38:39,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597856174] [2022-07-13 22:38:39,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597856174] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:38:39,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731576558] [2022-07-13 22:38:39,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:38:39,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:38:39,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:38:39,348 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) [2022-07-13 22:38:39,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-13 22:38:39,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:39,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 2719 conjuncts, 76 conjunts are in the unsatisfiable core [2022-07-13 22:38:39,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:38:40,097 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-13 22:38:40,097 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 26 treesize of output 30 [2022-07-13 22:38:40,104 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 15 treesize of output 11 [2022-07-13 22:38:40,172 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-07-13 22:38:40,172 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 35 treesize of output 34 [2022-07-13 22:38:40,942 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 79 proven. 34 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-13 22:38:40,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:38:41,705 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 60 proven. 14 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-13 22:38:41,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731576558] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:38:41,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:38:41,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 19, 12] total 35 [2022-07-13 22:38:41,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441810849] [2022-07-13 22:38:41,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:38:41,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-13 22:38:41,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:38:41,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-13 22:38:41,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1069, Unknown=0, NotChecked=0, Total=1190 [2022-07-13 22:38:41,708 INFO L87 Difference]: Start difference. First operand 326 states and 399 transitions. Second operand has 35 states, 32 states have (on average 4.1875) internal successors, (134), 32 states have internal predecessors, (134), 11 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (27), 8 states have call predecessors, (27), 10 states have call successors, (27) [2022-07-13 22:38:44,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 22:38:44,571 INFO L93 Difference]: Finished difference Result 598 states and 757 transitions. [2022-07-13 22:38:44,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-13 22:38:44,572 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 4.1875) internal successors, (134), 32 states have internal predecessors, (134), 11 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (27), 8 states have call predecessors, (27), 10 states have call successors, (27) Word has length 132 [2022-07-13 22:38:44,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 22:38:44,574 INFO L225 Difference]: With dead ends: 598 [2022-07-13 22:38:44,574 INFO L226 Difference]: Without dead ends: 462 [2022-07-13 22:38:44,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 265 SyntacticMatches, 11 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=502, Invalid=3530, Unknown=0, NotChecked=0, Total=4032 [2022-07-13 22:38:44,575 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 296 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 2437 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 863 SdHoareTripleChecker+Invalid, 3152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 2437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 536 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-13 22:38:44,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 863 Invalid, 3152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 2437 Invalid, 0 Unknown, 536 Unchecked, 1.6s Time] [2022-07-13 22:38:44,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-07-13 22:38:44,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 399. [2022-07-13 22:38:44,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 301 states have (on average 1.1096345514950166) internal successors, (334), 310 states have internal predecessors, (334), 62 states have call successors, (62), 29 states have call predecessors, (62), 35 states have return successors, (101), 59 states have call predecessors, (101), 61 states have call successors, (101) [2022-07-13 22:38:44,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 497 transitions. [2022-07-13 22:38:44,600 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 497 transitions. Word has length 132 [2022-07-13 22:38:44,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 22:38:44,601 INFO L495 AbstractCegarLoop]: Abstraction has 399 states and 497 transitions. [2022-07-13 22:38:44,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 4.1875) internal successors, (134), 32 states have internal predecessors, (134), 11 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (27), 8 states have call predecessors, (27), 10 states have call successors, (27) [2022-07-13 22:38:44,601 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 497 transitions. [2022-07-13 22:38:44,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-07-13 22:38:44,603 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 22:38:44,603 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:38:44,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-13 22:38:44,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:38:44,830 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 22:38:44,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:38:44,831 INFO L85 PathProgramCache]: Analyzing trace with hash 398509804, now seen corresponding path program 1 times [2022-07-13 22:38:44,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:38:44,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187106224] [2022-07-13 22:38:44,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:38:44,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:38:44,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:44,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 22:38:44,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:44,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 22:38:44,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:45,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 22:38:45,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:45,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 22:38:45,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:45,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 22:38:45,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:45,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 22:38:45,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:45,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-13 22:38:45,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:45,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-13 22:38:45,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:45,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-07-13 22:38:45,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:45,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-07-13 22:38:45,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:45,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-07-13 22:38:45,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:45,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-07-13 22:38:45,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:45,091 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-07-13 22:38:45,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:38:45,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187106224] [2022-07-13 22:38:45,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187106224] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:38:45,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:38:45,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 22:38:45,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059411795] [2022-07-13 22:38:45,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:38:45,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:38:45,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:38:45,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:38:45,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 22:38:45,094 INFO L87 Difference]: Start difference. First operand 399 states and 497 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 5 states have internal predecessors, (58), 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) [2022-07-13 22:38:45,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 22:38:45,466 INFO L93 Difference]: Finished difference Result 516 states and 641 transitions. [2022-07-13 22:38:45,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 22:38:45,467 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 5 states have internal predecessors, (58), 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 132 [2022-07-13 22:38:45,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 22:38:45,470 INFO L225 Difference]: With dead ends: 516 [2022-07-13 22:38:45,470 INFO L226 Difference]: Without dead ends: 391 [2022-07-13 22:38:45,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-13 22:38:45,472 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 95 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 22:38:45,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 280 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 22:38:45,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-07-13 22:38:45,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 391. [2022-07-13 22:38:45,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 293 states have (on average 1.098976109215017) internal successors, (322), 302 states have internal predecessors, (322), 62 states have call successors, (62), 29 states have call predecessors, (62), 35 states have return successors, (101), 59 states have call predecessors, (101), 61 states have call successors, (101) [2022-07-13 22:38:45,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 485 transitions. [2022-07-13 22:38:45,496 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 485 transitions. Word has length 132 [2022-07-13 22:38:45,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 22:38:45,496 INFO L495 AbstractCegarLoop]: Abstraction has 391 states and 485 transitions. [2022-07-13 22:38:45,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 5 states have internal predecessors, (58), 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) [2022-07-13 22:38:45,497 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 485 transitions. [2022-07-13 22:38:45,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-07-13 22:38:45,498 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 22:38:45,498 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-13 22:38:45,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-13 22:38:45,499 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 22:38:45,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:38:45,499 INFO L85 PathProgramCache]: Analyzing trace with hash 345136370, now seen corresponding path program 1 times [2022-07-13 22:38:45,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:38:45,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70202140] [2022-07-13 22:38:45,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:38:45,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:38:45,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:45,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 22:38:45,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:45,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 22:38:45,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:45,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 22:38:45,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:45,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 22:38:45,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:45,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 22:38:45,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:46,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 22:38:46,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:46,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-13 22:38:46,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:46,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-13 22:38:46,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:46,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-07-13 22:38:46,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:46,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-07-13 22:38:46,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:46,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-07-13 22:38:46,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:46,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-07-13 22:38:46,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:46,091 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-07-13 22:38:46,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:38:46,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70202140] [2022-07-13 22:38:46,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70202140] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:38:46,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76476495] [2022-07-13 22:38:46,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:38:46,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:38:46,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:38:46,093 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) [2022-07-13 22:38:46,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-13 22:38:46,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:38:46,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 2724 conjuncts, 83 conjunts are in the unsatisfiable core [2022-07-13 22:38:46,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:38:46,767 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-13 22:38:46,767 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 26 treesize of output 30 [2022-07-13 22:38:46,771 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 15 treesize of output 11 [2022-07-13 22:38:46,846 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-07-13 22:38:46,847 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 35 treesize of output 34 [2022-07-13 22:38:54,147 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 82 proven. 48 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-13 22:38:54,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:38:54,954 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 60 proven. 14 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-13 22:38:54,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76476495] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:38:54,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:38:54,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 22, 12] total 45 [2022-07-13 22:38:54,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251049392] [2022-07-13 22:38:54,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:38:54,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-13 22:38:54,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:38:54,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-13 22:38:54,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1826, Unknown=1, NotChecked=0, Total=1980 [2022-07-13 22:38:54,957 INFO L87 Difference]: Start difference. First operand 391 states and 485 transitions. Second operand has 45 states, 42 states have (on average 3.8333333333333335) internal successors, (161), 42 states have internal predecessors, (161), 16 states have call successors, (39), 7 states have call predecessors, (39), 9 states have return successors, (35), 13 states have call predecessors, (35), 14 states have call successors, (35) [2022-07-13 22:39:01,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 22:39:01,235 INFO L93 Difference]: Finished difference Result 710 states and 879 transitions. [2022-07-13 22:39:01,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-07-13 22:39:01,236 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 42 states have (on average 3.8333333333333335) internal successors, (161), 42 states have internal predecessors, (161), 16 states have call successors, (39), 7 states have call predecessors, (39), 9 states have return successors, (35), 13 states have call predecessors, (35), 14 states have call successors, (35) Word has length 132 [2022-07-13 22:39:01,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 22:39:01,238 INFO L225 Difference]: With dead ends: 710 [2022-07-13 22:39:01,238 INFO L226 Difference]: Without dead ends: 486 [2022-07-13 22:39:01,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 265 SyntacticMatches, 13 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2819 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=1037, Invalid=9264, Unknown=1, NotChecked=0, Total=10302 [2022-07-13 22:39:01,242 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 611 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 5260 mSolverCounterSat, 501 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 859 SdHoareTripleChecker+Invalid, 6830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 501 IncrementalHoareTripleChecker+Valid, 5260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1069 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-07-13 22:39:01,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [617 Valid, 859 Invalid, 6830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [501 Valid, 5260 Invalid, 0 Unknown, 1069 Unchecked, 3.6s Time] [2022-07-13 22:39:01,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2022-07-13 22:39:01,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 397. [2022-07-13 22:39:01,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 303 states have (on average 1.0858085808580857) internal successors, (329), 310 states have internal predecessors, (329), 58 states have call successors, (58), 30 states have call predecessors, (58), 35 states have return successors, (77), 56 states have call predecessors, (77), 57 states have call successors, (77) [2022-07-13 22:39:01,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 464 transitions. [2022-07-13 22:39:01,265 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 464 transitions. Word has length 132 [2022-07-13 22:39:01,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 22:39:01,266 INFO L495 AbstractCegarLoop]: Abstraction has 397 states and 464 transitions. [2022-07-13 22:39:01,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 42 states have (on average 3.8333333333333335) internal successors, (161), 42 states have internal predecessors, (161), 16 states have call successors, (39), 7 states have call predecessors, (39), 9 states have return successors, (35), 13 states have call predecessors, (35), 14 states have call successors, (35) [2022-07-13 22:39:01,266 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 464 transitions. [2022-07-13 22:39:01,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-07-13 22:39:01,268 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 22:39:01,268 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:39:01,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-13 22:39:01,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-13 22:39:01,491 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 22:39:01,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:39:01,492 INFO L85 PathProgramCache]: Analyzing trace with hash -619042068, now seen corresponding path program 1 times [2022-07-13 22:39:01,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:39:01,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029848996] [2022-07-13 22:39:01,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:39:01,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:39:01,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:01,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 22:39:01,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:01,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 22:39:01,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:01,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 22:39:01,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:01,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 22:39:01,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:01,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 22:39:01,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:01,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 22:39:01,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:01,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-13 22:39:01,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:01,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-13 22:39:01,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:01,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-07-13 22:39:01,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:01,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-13 22:39:01,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:01,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 22:39:01,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:01,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 22:39:01,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:01,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 22:39:01,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:01,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 22:39:01,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:01,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 22:39:01,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:01,718 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2022-07-13 22:39:01,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:39:01,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029848996] [2022-07-13 22:39:01,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029848996] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:39:01,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:39:01,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 22:39:01,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172946691] [2022-07-13 22:39:01,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:39:01,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 22:39:01,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:39:01,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 22:39:01,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 22:39:01,721 INFO L87 Difference]: Start difference. First operand 397 states and 464 transitions. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2022-07-13 22:39:02,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 22:39:02,247 INFO L93 Difference]: Finished difference Result 483 states and 571 transitions. [2022-07-13 22:39:02,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 22:39:02,248 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (16), 4 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 134 [2022-07-13 22:39:02,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 22:39:02,250 INFO L225 Difference]: With dead ends: 483 [2022-07-13 22:39:02,250 INFO L226 Difference]: Without dead ends: 428 [2022-07-13 22:39:02,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-07-13 22:39:02,251 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 136 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 22:39:02,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 387 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 22:39:02,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-07-13 22:39:02,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 404. [2022-07-13 22:39:02,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 308 states have (on average 1.0844155844155845) internal successors, (334), 316 states have internal predecessors, (334), 58 states have call successors, (58), 30 states have call predecessors, (58), 37 states have return successors, (79), 57 states have call predecessors, (79), 57 states have call successors, (79) [2022-07-13 22:39:02,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 471 transitions. [2022-07-13 22:39:02,277 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 471 transitions. Word has length 134 [2022-07-13 22:39:02,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 22:39:02,277 INFO L495 AbstractCegarLoop]: Abstraction has 404 states and 471 transitions. [2022-07-13 22:39:02,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2022-07-13 22:39:02,278 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 471 transitions. [2022-07-13 22:39:02,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-07-13 22:39:02,279 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 22:39:02,279 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:39:02,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-13 22:39:02,280 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 22:39:02,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:39:02,280 INFO L85 PathProgramCache]: Analyzing trace with hash 729890910, now seen corresponding path program 1 times [2022-07-13 22:39:02,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:39:02,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302795606] [2022-07-13 22:39:02,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:39:02,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:39:02,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:02,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 22:39:02,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:02,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 22:39:02,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:02,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 22:39:02,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:02,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 22:39:02,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:02,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 22:39:02,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:02,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 22:39:02,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:02,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-13 22:39:02,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:02,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-13 22:39:02,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:02,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-07-13 22:39:02,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:02,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-07-13 22:39:02,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:02,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-07-13 22:39:02,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:02,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-07-13 22:39:02,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:02,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-07-13 22:39:02,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:02,859 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 26 proven. 14 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-07-13 22:39:02,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:39:02,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302795606] [2022-07-13 22:39:02,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302795606] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:39:02,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368095547] [2022-07-13 22:39:02,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:39:02,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:39:02,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:39:02,862 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:39:02,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-13 22:39:03,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:03,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 2768 conjuncts, 122 conjunts are in the unsatisfiable core [2022-07-13 22:39:03,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:39:03,436 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-13 22:39:03,823 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-13 22:39:03,824 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 16 treesize of output 22 [2022-07-13 22:39:03,827 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 7 treesize of output 3 [2022-07-13 22:39:03,841 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-13 22:39:03,842 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 17 treesize of output 23 [2022-07-13 22:39:03,848 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 8 treesize of output 6 [2022-07-13 22:39:03,924 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-13 22:39:03,926 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 20 treesize of output 26 [2022-07-13 22:39:03,937 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-13 22:39:03,938 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 21 treesize of output 27 [2022-07-13 22:39:03,963 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 [2022-07-13 22:39:03,965 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 [2022-07-13 22:39:04,237 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 [2022-07-13 22:39:04,247 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-13 22:39:04,247 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 16 treesize of output 22 [2022-07-13 22:39:04,258 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-13 22:39:04,258 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 16 treesize of output 22 [2022-07-13 22:39:04,271 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 7 treesize of output 3 [2022-07-13 22:39:04,274 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 7 treesize of output 3 [2022-07-13 22:39:11,531 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 57 proven. 89 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 22:39:11,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:39:12,814 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 50 proven. 14 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-13 22:39:12,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368095547] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:39:12,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:39:12,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 35, 13] total 61 [2022-07-13 22:39:12,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698790127] [2022-07-13 22:39:12,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:39:12,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-07-13 22:39:12,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:39:12,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-07-13 22:39:12,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=3421, Unknown=1, NotChecked=0, Total=3660 [2022-07-13 22:39:12,821 INFO L87 Difference]: Start difference. First operand 404 states and 471 transitions. Second operand has 61 states, 57 states have (on average 3.543859649122807) internal successors, (202), 55 states have internal predecessors, (202), 19 states have call successors, (42), 9 states have call predecessors, (42), 13 states have return successors, (38), 15 states have call predecessors, (38), 18 states have call successors, (38) [2022-07-13 22:39:20,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 22:39:20,278 INFO L93 Difference]: Finished difference Result 694 states and 854 transitions. [2022-07-13 22:39:20,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-07-13 22:39:20,279 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 57 states have (on average 3.543859649122807) internal successors, (202), 55 states have internal predecessors, (202), 19 states have call successors, (42), 9 states have call predecessors, (42), 13 states have return successors, (38), 15 states have call predecessors, (38), 18 states have call successors, (38) Word has length 133 [2022-07-13 22:39:20,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 22:39:20,281 INFO L225 Difference]: With dead ends: 694 [2022-07-13 22:39:20,281 INFO L226 Difference]: Without dead ends: 463 [2022-07-13 22:39:20,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 257 SyntacticMatches, 11 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3644 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=764, Invalid=10576, Unknown=2, NotChecked=0, Total=11342 [2022-07-13 22:39:20,284 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 497 mSDsluCounter, 1548 mSDsCounter, 0 mSdLazyCounter, 4920 mSolverCounterSat, 362 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 1727 SdHoareTripleChecker+Invalid, 6104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 362 IncrementalHoareTripleChecker+Valid, 4920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 822 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-07-13 22:39:20,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [523 Valid, 1727 Invalid, 6104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [362 Valid, 4920 Invalid, 0 Unknown, 822 Unchecked, 3.4s Time] [2022-07-13 22:39:20,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-07-13 22:39:20,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 368. [2022-07-13 22:39:20,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 277 states have (on average 1.0794223826714802) internal successors, (299), 283 states have internal predecessors, (299), 56 states have call successors, (56), 29 states have call predecessors, (56), 34 states have return successors, (68), 55 states have call predecessors, (68), 55 states have call successors, (68) [2022-07-13 22:39:20,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 423 transitions. [2022-07-13 22:39:20,313 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 423 transitions. Word has length 133 [2022-07-13 22:39:20,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 22:39:20,314 INFO L495 AbstractCegarLoop]: Abstraction has 368 states and 423 transitions. [2022-07-13 22:39:20,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 57 states have (on average 3.543859649122807) internal successors, (202), 55 states have internal predecessors, (202), 19 states have call successors, (42), 9 states have call predecessors, (42), 13 states have return successors, (38), 15 states have call predecessors, (38), 18 states have call successors, (38) [2022-07-13 22:39:20,314 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 423 transitions. [2022-07-13 22:39:20,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-07-13 22:39:20,315 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 22:39:20,316 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:39:20,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-13 22:39:20,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-07-13 22:39:20,532 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 22:39:20,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:39:20,532 INFO L85 PathProgramCache]: Analyzing trace with hash -345180764, now seen corresponding path program 1 times [2022-07-13 22:39:20,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:39:20,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678697103] [2022-07-13 22:39:20,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:39:20,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:39:20,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:20,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 22:39:20,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:20,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 22:39:20,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:20,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 22:39:20,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:20,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 22:39:20,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:20,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 22:39:20,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:20,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 22:39:20,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:21,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-13 22:39:21,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:21,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-13 22:39:21,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:21,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-07-13 22:39:21,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:21,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-07-13 22:39:21,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:21,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-07-13 22:39:21,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:21,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-07-13 22:39:21,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:21,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-07-13 22:39:21,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:21,195 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-07-13 22:39:21,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:39:21,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678697103] [2022-07-13 22:39:21,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678697103] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:39:21,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677969775] [2022-07-13 22:39:21,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:39:21,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:39:21,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:39:21,200 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:39:21,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-13 22:39:21,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:21,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 2763 conjuncts, 92 conjunts are in the unsatisfiable core [2022-07-13 22:39:21,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:39:21,828 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-13 22:39:26,011 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-13 22:39:26,011 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-13 22:39:26,051 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-13 22:39:26,051 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 17 treesize of output 23 [2022-07-13 22:39:26,056 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 8 treesize of output 4 [2022-07-13 22:39:26,168 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-13 22:39:26,168 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 21 treesize of output 27 [2022-07-13 22:39:26,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 22:39:26,223 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 26 treesize of output 25 [2022-07-13 22:39:26,228 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-13 22:39:26,228 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 [2022-07-13 22:39:26,471 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-07-13 22:39:26,602 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 18 treesize of output 20 [2022-07-13 22:39:27,057 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 108 proven. 48 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-13 22:39:27,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:39:27,370 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2275 (Array Int Int))) (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_aws_byte_buf_write_be16_~#x#1.base| v_ArrVal_2275) |c_ULTIMATE.start_aws_byte_buf_write_be16_~buf#1.base|) (+ |c_ULTIMATE.start_aws_byte_buf_write_be16_~buf#1.offset| 16)) 18446744073709551616) 0)) is different from false [2022-07-13 22:39:27,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677969775] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:39:27,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 22:39:27,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 28] total 43 [2022-07-13 22:39:27,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833872004] [2022-07-13 22:39:27,377 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 22:39:27,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-13 22:39:27,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:39:27,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-13 22:39:27,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=2190, Unknown=2, NotChecked=94, Total=2450 [2022-07-13 22:39:27,379 INFO L87 Difference]: Start difference. First operand 368 states and 423 transitions. Second operand has 43 states, 38 states have (on average 3.8947368421052633) internal successors, (148), 39 states have internal predecessors, (148), 15 states have call successors, (29), 7 states have call predecessors, (29), 11 states have return successors, (26), 12 states have call predecessors, (26), 14 states have call successors, (26) [2022-07-13 22:39:32,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 22:39:32,282 INFO L93 Difference]: Finished difference Result 578 states and 675 transitions. [2022-07-13 22:39:32,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-13 22:39:32,283 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 38 states have (on average 3.8947368421052633) internal successors, (148), 39 states have internal predecessors, (148), 15 states have call successors, (29), 7 states have call predecessors, (29), 11 states have return successors, (26), 12 states have call predecessors, (26), 14 states have call successors, (26) Word has length 133 [2022-07-13 22:39:32,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 22:39:32,285 INFO L225 Difference]: With dead ends: 578 [2022-07-13 22:39:32,285 INFO L226 Difference]: Without dead ends: 392 [2022-07-13 22:39:32,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 185 SyntacticMatches, 8 SemanticMatches, 80 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=500, Invalid=5981, Unknown=3, NotChecked=158, Total=6642 [2022-07-13 22:39:32,289 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 277 mSDsluCounter, 1270 mSDsCounter, 0 mSdLazyCounter, 2979 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 1405 SdHoareTripleChecker+Invalid, 3853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 2979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 739 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-13 22:39:32,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 1405 Invalid, 3853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 2979 Invalid, 0 Unknown, 739 Unchecked, 1.7s Time] [2022-07-13 22:39:32,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-07-13 22:39:32,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 367. [2022-07-13 22:39:32,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 277 states have (on average 1.0794223826714802) internal successors, (299), 283 states have internal predecessors, (299), 55 states have call successors, (55), 29 states have call predecessors, (55), 34 states have return successors, (66), 54 states have call predecessors, (66), 54 states have call successors, (66) [2022-07-13 22:39:32,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 420 transitions. [2022-07-13 22:39:32,317 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 420 transitions. Word has length 133 [2022-07-13 22:39:32,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 22:39:32,318 INFO L495 AbstractCegarLoop]: Abstraction has 367 states and 420 transitions. [2022-07-13 22:39:32,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 38 states have (on average 3.8947368421052633) internal successors, (148), 39 states have internal predecessors, (148), 15 states have call successors, (29), 7 states have call predecessors, (29), 11 states have return successors, (26), 12 states have call predecessors, (26), 14 states have call successors, (26) [2022-07-13 22:39:32,318 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 420 transitions. [2022-07-13 22:39:32,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-07-13 22:39:32,319 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 22:39:32,320 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-13 22:39:32,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-13 22:39:32,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-13 22:39:32,543 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 22:39:32,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:39:32,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1640610541, now seen corresponding path program 1 times [2022-07-13 22:39:32,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:39:32,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423532117] [2022-07-13 22:39:32,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:39:32,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:39:32,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:32,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 22:39:32,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:32,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 22:39:32,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:32,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 22:39:32,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:32,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 22:39:32,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:32,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 22:39:32,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:32,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 22:39:32,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:32,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-13 22:39:32,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:32,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-13 22:39:32,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:32,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-07-13 22:39:32,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:32,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-07-13 22:39:32,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:32,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-07-13 22:39:32,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:32,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-07-13 22:39:32,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:32,834 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-07-13 22:39:32,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:39:32,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423532117] [2022-07-13 22:39:32,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423532117] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:39:32,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:39:32,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-13 22:39:32,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567704982] [2022-07-13 22:39:32,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:39:32,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 22:39:32,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:39:32,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 22:39:32,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-07-13 22:39:32,835 INFO L87 Difference]: Start difference. First operand 367 states and 420 transitions. Second operand has 11 states, 10 states have (on average 5.1) internal successors, (51), 8 states have internal predecessors, (51), 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) [2022-07-13 22:39:33,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 22:39:33,400 INFO L93 Difference]: Finished difference Result 379 states and 433 transitions. [2022-07-13 22:39:33,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 22:39:33,401 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.1) internal successors, (51), 8 states have internal predecessors, (51), 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 134 [2022-07-13 22:39:33,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 22:39:33,403 INFO L225 Difference]: With dead ends: 379 [2022-07-13 22:39:33,403 INFO L226 Difference]: Without dead ends: 377 [2022-07-13 22:39:33,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-07-13 22:39:33,404 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 94 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 22:39:33,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 640 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 22:39:33,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-07-13 22:39:33,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 371. [2022-07-13 22:39:33,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 280 states have (on average 1.0785714285714285) internal successors, (302), 286 states have internal predecessors, (302), 55 states have call successors, (55), 30 states have call predecessors, (55), 35 states have return successors, (66), 54 states have call predecessors, (66), 54 states have call successors, (66) [2022-07-13 22:39:33,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 423 transitions. [2022-07-13 22:39:33,431 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 423 transitions. Word has length 134 [2022-07-13 22:39:33,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 22:39:33,431 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 423 transitions. [2022-07-13 22:39:33,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.1) internal successors, (51), 8 states have internal predecessors, (51), 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) [2022-07-13 22:39:33,432 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 423 transitions. [2022-07-13 22:39:33,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-07-13 22:39:33,433 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 22:39:33,433 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:39:33,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-13 22:39:33,433 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 22:39:33,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:39:33,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1738674927, now seen corresponding path program 1 times [2022-07-13 22:39:33,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:39:33,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024302821] [2022-07-13 22:39:33,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:39:33,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:39:34,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:34,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 22:39:34,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:34,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 22:39:34,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:34,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 22:39:34,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:34,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 22:39:34,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:34,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 22:39:34,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:34,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 22:39:34,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:34,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-13 22:39:34,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:34,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-13 22:39:34,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:34,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-13 22:39:34,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:34,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-13 22:39:34,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:34,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-07-13 22:39:34,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:34,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-13 22:39:34,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:34,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-13 22:39:34,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:34,836 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 44 proven. 30 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-07-13 22:39:34,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:39:34,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024302821] [2022-07-13 22:39:34,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024302821] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:39:34,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171793226] [2022-07-13 22:39:34,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:39:34,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:39:34,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:39:34,840 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:39:34,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-13 22:39:35,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:35,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 2777 conjuncts, 96 conjunts are in the unsatisfiable core [2022-07-13 22:39:35,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:39:35,401 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-13 22:39:37,706 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-13 22:39:37,707 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 19 treesize of output 25 [2022-07-13 22:39:37,712 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 10 treesize of output 6 [2022-07-13 22:39:37,758 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-13 22:39:37,758 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 29 [2022-07-13 22:39:37,767 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 [2022-07-13 22:39:39,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 22:39:39,962 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 24 treesize of output 23 [2022-07-13 22:39:48,466 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 64 proven. 62 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-13 22:39:48,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:39:49,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171793226] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:39:49,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 22:39:49,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 36 [2022-07-13 22:39:49,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782658618] [2022-07-13 22:39:49,832 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 22:39:49,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-13 22:39:49,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:39:49,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-13 22:39:49,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1645, Unknown=2, NotChecked=0, Total=1806 [2022-07-13 22:39:49,833 INFO L87 Difference]: Start difference. First operand 371 states and 423 transitions. Second operand has 36 states, 32 states have (on average 4.46875) internal successors, (143), 34 states have internal predecessors, (143), 17 states have call successors, (28), 5 states have call predecessors, (28), 7 states have return successors, (26), 13 states have call predecessors, (26), 15 states have call successors, (26) [2022-07-13 22:39:51,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 22:39:51,435 INFO L93 Difference]: Finished difference Result 564 states and 647 transitions. [2022-07-13 22:39:51,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-13 22:39:51,435 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 32 states have (on average 4.46875) internal successors, (143), 34 states have internal predecessors, (143), 17 states have call successors, (28), 5 states have call predecessors, (28), 7 states have return successors, (26), 13 states have call predecessors, (26), 15 states have call successors, (26) Word has length 139 [2022-07-13 22:39:51,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 22:39:51,437 INFO L225 Difference]: With dead ends: 564 [2022-07-13 22:39:51,437 INFO L226 Difference]: Without dead ends: 379 [2022-07-13 22:39:51,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 200 SyntacticMatches, 12 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1421 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=449, Invalid=3971, Unknown=2, NotChecked=0, Total=4422 [2022-07-13 22:39:51,438 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 239 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 1648 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 2451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 695 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-13 22:39:51,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 712 Invalid, 2451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1648 Invalid, 0 Unknown, 695 Unchecked, 0.9s Time] [2022-07-13 22:39:51,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-07-13 22:39:51,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 364. [2022-07-13 22:39:51,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 279 states have (on average 1.064516129032258) internal successors, (297), 286 states have internal predecessors, (297), 50 states have call successors, (50), 29 states have call predecessors, (50), 34 states have return successors, (56), 48 states have call predecessors, (56), 49 states have call successors, (56) [2022-07-13 22:39:51,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 403 transitions. [2022-07-13 22:39:51,467 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 403 transitions. Word has length 139 [2022-07-13 22:39:51,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 22:39:51,467 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 403 transitions. [2022-07-13 22:39:51,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 32 states have (on average 4.46875) internal successors, (143), 34 states have internal predecessors, (143), 17 states have call successors, (28), 5 states have call predecessors, (28), 7 states have return successors, (26), 13 states have call predecessors, (26), 15 states have call successors, (26) [2022-07-13 22:39:51,468 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 403 transitions. [2022-07-13 22:39:51,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-07-13 22:39:51,469 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 22:39:51,469 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:39:51,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-13 22:39:51,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:39:51,695 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 22:39:51,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:39:51,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1519820209, now seen corresponding path program 1 times [2022-07-13 22:39:51,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:39:51,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046570850] [2022-07-13 22:39:51,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:39:51,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:39:52,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:52,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 22:39:52,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:52,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 22:39:52,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:52,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 22:39:52,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:52,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 22:39:52,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:52,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 22:39:52,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:52,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 22:39:52,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:52,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-13 22:39:52,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:52,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-13 22:39:52,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:52,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-13 22:39:52,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:52,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-13 22:39:52,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:52,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-07-13 22:39:52,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:52,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-13 22:39:52,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:52,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-13 22:39:52,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:53,069 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 28 proven. 46 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-07-13 22:39:53,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:39:53,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046570850] [2022-07-13 22:39:53,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046570850] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:39:53,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381934688] [2022-07-13 22:39:53,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:39:53,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:39:53,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:39:53,072 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:39:53,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-13 22:39:53,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:39:53,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 2782 conjuncts, 66 conjunts are in the unsatisfiable core [2022-07-13 22:39:53,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:39:55,867 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-13 22:39:55,867 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 19 treesize of output 25 [2022-07-13 22:39:55,870 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 10 treesize of output 6 [2022-07-13 22:39:55,925 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-13 22:39:55,925 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 29 [2022-07-13 22:39:55,930 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 10 treesize of output 6 [2022-07-13 22:39:55,935 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 [2022-07-13 22:39:55,959 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 [2022-07-13 22:40:02,433 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 76 proven. 54 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-07-13 22:40:02,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:40:02,816 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 60 proven. 14 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-07-13 22:40:02,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381934688] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:40:02,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:40:02,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18, 9] total 43 [2022-07-13 22:40:02,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53116538] [2022-07-13 22:40:02,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:40:02,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-13 22:40:02,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:40:02,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-13 22:40:02,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1631, Unknown=1, NotChecked=0, Total=1806 [2022-07-13 22:40:02,818 INFO L87 Difference]: Start difference. First operand 364 states and 403 transitions. Second operand has 43 states, 41 states have (on average 4.146341463414634) internal successors, (170), 39 states have internal predecessors, (170), 16 states have call successors, (42), 6 states have call predecessors, (42), 8 states have return successors, (38), 14 states have call predecessors, (38), 14 states have call successors, (38) [2022-07-13 22:40:04,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 22:40:04,767 INFO L93 Difference]: Finished difference Result 451 states and 508 transitions. [2022-07-13 22:40:04,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-13 22:40:04,767 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 4.146341463414634) internal successors, (170), 39 states have internal predecessors, (170), 16 states have call successors, (42), 6 states have call predecessors, (42), 8 states have return successors, (38), 14 states have call predecessors, (38), 14 states have call successors, (38) Word has length 139 [2022-07-13 22:40:04,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 22:40:04,768 INFO L225 Difference]: With dead ends: 451 [2022-07-13 22:40:04,768 INFO L226 Difference]: Without dead ends: 362 [2022-07-13 22:40:04,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 286 SyntacticMatches, 7 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=403, Invalid=3256, Unknown=1, NotChecked=0, Total=3660 [2022-07-13 22:40:04,769 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 251 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 2712 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 3073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 2712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 277 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-13 22:40:04,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 846 Invalid, 3073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 2712 Invalid, 0 Unknown, 277 Unchecked, 1.5s Time] [2022-07-13 22:40:04,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-07-13 22:40:04,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 331. [2022-07-13 22:40:04,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 251 states have (on average 1.0637450199203187) internal successors, (267), 255 states have internal predecessors, (267), 48 states have call successors, (48), 28 states have call predecessors, (48), 31 states have return successors, (53), 47 states have call predecessors, (53), 47 states have call successors, (53) [2022-07-13 22:40:04,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 368 transitions. [2022-07-13 22:40:04,795 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 368 transitions. Word has length 139 [2022-07-13 22:40:04,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 22:40:04,796 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 368 transitions. [2022-07-13 22:40:04,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 4.146341463414634) internal successors, (170), 39 states have internal predecessors, (170), 16 states have call successors, (42), 6 states have call predecessors, (42), 8 states have return successors, (38), 14 states have call predecessors, (38), 14 states have call successors, (38) [2022-07-13 22:40:04,796 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 368 transitions. [2022-07-13 22:40:04,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-07-13 22:40:04,797 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 22:40:04,797 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-13 22:40:04,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-13 22:40:05,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-13 22:40:05,006 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 22:40:05,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:40:05,006 INFO L85 PathProgramCache]: Analyzing trace with hash 826318588, now seen corresponding path program 1 times [2022-07-13 22:40:05,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:40:05,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140638488] [2022-07-13 22:40:05,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:40:05,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:40:05,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:05,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 22:40:05,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:05,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 22:40:05,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:05,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 22:40:05,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:05,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 22:40:05,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:05,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 22:40:05,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:05,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 22:40:05,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:05,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-13 22:40:05,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:05,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-13 22:40:05,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:05,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-13 22:40:05,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:05,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-13 22:40:05,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:05,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-07-13 22:40:05,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:05,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-13 22:40:05,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:05,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-13 22:40:05,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:06,044 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-07-13 22:40:06,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:40:06,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140638488] [2022-07-13 22:40:06,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140638488] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:40:06,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:40:06,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-07-13 22:40:06,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103270897] [2022-07-13 22:40:06,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:40:06,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-13 22:40:06,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:40:06,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-13 22:40:06,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2022-07-13 22:40:06,045 INFO L87 Difference]: Start difference. First operand 331 states and 368 transitions. Second operand has 23 states, 21 states have (on average 3.0) internal successors, (63), 18 states have internal predecessors, (63), 9 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (13), 9 states have call predecessors, (13), 7 states have call successors, (13) [2022-07-13 22:40:07,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 22:40:07,342 INFO L93 Difference]: Finished difference Result 359 states and 407 transitions. [2022-07-13 22:40:07,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-13 22:40:07,342 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.0) internal successors, (63), 18 states have internal predecessors, (63), 9 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (13), 9 states have call predecessors, (13), 7 states have call successors, (13) Word has length 141 [2022-07-13 22:40:07,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 22:40:07,344 INFO L225 Difference]: With dead ends: 359 [2022-07-13 22:40:07,344 INFO L226 Difference]: Without dead ends: 357 [2022-07-13 22:40:07,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=175, Invalid=1307, Unknown=0, NotChecked=0, Total=1482 [2022-07-13 22:40:07,345 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 149 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 2043 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 2158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 2043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-13 22:40:07,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 605 Invalid, 2158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 2043 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-13 22:40:07,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-07-13 22:40:07,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 335. [2022-07-13 22:40:07,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 254 states have (on average 1.062992125984252) internal successors, (270), 258 states have internal predecessors, (270), 48 states have call successors, (48), 29 states have call predecessors, (48), 32 states have return successors, (53), 47 states have call predecessors, (53), 47 states have call successors, (53) [2022-07-13 22:40:07,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 371 transitions. [2022-07-13 22:40:07,367 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 371 transitions. Word has length 141 [2022-07-13 22:40:07,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 22:40:07,367 INFO L495 AbstractCegarLoop]: Abstraction has 335 states and 371 transitions. [2022-07-13 22:40:07,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.0) internal successors, (63), 18 states have internal predecessors, (63), 9 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (13), 9 states have call predecessors, (13), 7 states have call successors, (13) [2022-07-13 22:40:07,367 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 371 transitions. [2022-07-13 22:40:07,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-07-13 22:40:07,368 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 22:40:07,369 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 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] [2022-07-13 22:40:07,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-13 22:40:07,369 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 22:40:07,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:40:07,369 INFO L85 PathProgramCache]: Analyzing trace with hash -623700775, now seen corresponding path program 1 times [2022-07-13 22:40:07,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:40:07,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245830842] [2022-07-13 22:40:07,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:40:07,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:40:07,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:07,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 22:40:07,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:07,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 22:40:07,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:07,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 22:40:07,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:07,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 22:40:07,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:07,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 22:40:07,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:07,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 22:40:07,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:07,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-13 22:40:07,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:07,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-13 22:40:07,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:07,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-13 22:40:07,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:07,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 22:40:07,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:07,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 22:40:07,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:07,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-13 22:40:07,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:07,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-13 22:40:07,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:07,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 22:40:07,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:07,637 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-07-13 22:40:07,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:40:07,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245830842] [2022-07-13 22:40:07,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245830842] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:40:07,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:40:07,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-13 22:40:07,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743977417] [2022-07-13 22:40:07,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:40:07,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 22:40:07,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:40:07,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 22:40:07,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-13 22:40:07,640 INFO L87 Difference]: Start difference. First operand 335 states and 371 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 6 states have internal predecessors, (54), 4 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-07-13 22:40:08,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 22:40:08,177 INFO L93 Difference]: Finished difference Result 352 states and 391 transitions. [2022-07-13 22:40:08,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 22:40:08,177 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 6 states have internal predecessors, (54), 4 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 146 [2022-07-13 22:40:08,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 22:40:08,179 INFO L225 Difference]: With dead ends: 352 [2022-07-13 22:40:08,179 INFO L226 Difference]: Without dead ends: 350 [2022-07-13 22:40:08,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-07-13 22:40:08,179 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 184 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 22:40:08,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 284 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 22:40:08,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-07-13 22:40:08,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 339. [2022-07-13 22:40:08,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 257 states have (on average 1.0622568093385214) internal successors, (273), 261 states have internal predecessors, (273), 48 states have call successors, (48), 30 states have call predecessors, (48), 33 states have return successors, (53), 47 states have call predecessors, (53), 47 states have call successors, (53) [2022-07-13 22:40:08,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 374 transitions. [2022-07-13 22:40:08,207 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 374 transitions. Word has length 146 [2022-07-13 22:40:08,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 22:40:08,208 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 374 transitions. [2022-07-13 22:40:08,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 6 states have internal predecessors, (54), 4 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-07-13 22:40:08,208 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 374 transitions. [2022-07-13 22:40:08,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-07-13 22:40:08,209 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 22:40:08,210 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1] [2022-07-13 22:40:08,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-13 22:40:08,210 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 22:40:08,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:40:08,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1881452801, now seen corresponding path program 1 times [2022-07-13 22:40:08,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:40:08,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18328987] [2022-07-13 22:40:08,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:40:08,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:40:08,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:08,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 22:40:08,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:08,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 22:40:08,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:08,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 22:40:08,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:08,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 22:40:08,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:08,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 22:40:08,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:08,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 22:40:08,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:08,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-13 22:40:08,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:08,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-13 22:40:08,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:08,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-13 22:40:08,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:09,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 22:40:09,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:09,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 22:40:09,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:09,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-13 22:40:09,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:09,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-13 22:40:09,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:09,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 22:40:09,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:09,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-13 22:40:09,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:09,046 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-07-13 22:40:09,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:40:09,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18328987] [2022-07-13 22:40:09,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18328987] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:40:09,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:40:09,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-13 22:40:09,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272471683] [2022-07-13 22:40:09,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:40:09,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-13 22:40:09,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:40:09,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-13 22:40:09,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2022-07-13 22:40:09,050 INFO L87 Difference]: Start difference. First operand 339 states and 374 transitions. Second operand has 20 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 9 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) [2022-07-13 22:40:10,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 22:40:10,392 INFO L93 Difference]: Finished difference Result 375 states and 422 transitions. [2022-07-13 22:40:10,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 22:40:10,392 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 9 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) Word has length 152 [2022-07-13 22:40:10,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 22:40:10,394 INFO L225 Difference]: With dead ends: 375 [2022-07-13 22:40:10,394 INFO L226 Difference]: Without dead ends: 373 [2022-07-13 22:40:10,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2022-07-13 22:40:10,394 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 319 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 1743 mSolverCounterSat, 305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 2048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 1743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-13 22:40:10,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 342 Invalid, 2048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [305 Valid, 1743 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-13 22:40:10,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-07-13 22:40:10,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 350. [2022-07-13 22:40:10,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 265 states have (on average 1.0641509433962264) internal successors, (282), 269 states have internal predecessors, (282), 50 states have call successors, (50), 31 states have call predecessors, (50), 34 states have return successors, (55), 49 states have call predecessors, (55), 49 states have call successors, (55) [2022-07-13 22:40:10,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 387 transitions. [2022-07-13 22:40:10,424 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 387 transitions. Word has length 152 [2022-07-13 22:40:10,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 22:40:10,424 INFO L495 AbstractCegarLoop]: Abstraction has 350 states and 387 transitions. [2022-07-13 22:40:10,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 9 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) [2022-07-13 22:40:10,425 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 387 transitions. [2022-07-13 22:40:10,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-07-13 22:40:10,426 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 22:40:10,426 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:40:10,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-07-13 22:40:10,427 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 22:40:10,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:40:10,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1223464279, now seen corresponding path program 1 times [2022-07-13 22:40:10,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:40:10,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431781599] [2022-07-13 22:40:10,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:40:10,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:40:10,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:10,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 22:40:10,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:10,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 22:40:10,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:10,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 22:40:10,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:10,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 22:40:10,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:10,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 22:40:10,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:10,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 22:40:10,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:10,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-13 22:40:10,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:10,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-13 22:40:10,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:10,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-07-13 22:40:10,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:10,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-07-13 22:40:10,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:10,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-07-13 22:40:10,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:10,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-07-13 22:40:10,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:10,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 22:40:10,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:10,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 22:40:10,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:10,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-13 22:40:10,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:10,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-13 22:40:10,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:10,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-07-13 22:40:10,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:10,687 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2022-07-13 22:40:10,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:40:10,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431781599] [2022-07-13 22:40:10,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431781599] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:40:10,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:40:10,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-13 22:40:10,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866788131] [2022-07-13 22:40:10,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:40:10,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 22:40:10,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:40:10,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 22:40:10,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-07-13 22:40:10,689 INFO L87 Difference]: Start difference. First operand 350 states and 387 transitions. Second operand has 10 states, 9 states have (on average 6.666666666666667) internal successors, (60), 6 states have internal predecessors, (60), 2 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) [2022-07-13 22:40:11,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 22:40:11,332 INFO L93 Difference]: Finished difference Result 373 states and 415 transitions. [2022-07-13 22:40:11,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 22:40:11,333 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.666666666666667) internal successors, (60), 6 states have internal predecessors, (60), 2 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) Word has length 156 [2022-07-13 22:40:11,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 22:40:11,334 INFO L225 Difference]: With dead ends: 373 [2022-07-13 22:40:11,334 INFO L226 Difference]: Without dead ends: 371 [2022-07-13 22:40:11,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-07-13 22:40:11,335 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 148 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 22:40:11,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 508 Invalid, 891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 22:40:11,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-07-13 22:40:11,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 360. [2022-07-13 22:40:11,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 271 states have (on average 1.062730627306273) internal successors, (288), 276 states have internal predecessors, (288), 52 states have call successors, (52), 32 states have call predecessors, (52), 36 states have return successors, (60), 51 states have call predecessors, (60), 51 states have call successors, (60) [2022-07-13 22:40:11,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 400 transitions. [2022-07-13 22:40:11,365 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 400 transitions. Word has length 156 [2022-07-13 22:40:11,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 22:40:11,365 INFO L495 AbstractCegarLoop]: Abstraction has 360 states and 400 transitions. [2022-07-13 22:40:11,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.666666666666667) internal successors, (60), 6 states have internal predecessors, (60), 2 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) [2022-07-13 22:40:11,366 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 400 transitions. [2022-07-13 22:40:11,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-07-13 22:40:11,367 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 22:40:11,367 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1] [2022-07-13 22:40:11,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-07-13 22:40:11,367 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 22:40:11,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:40:11,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1711512995, now seen corresponding path program 1 times [2022-07-13 22:40:11,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:40:11,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556779025] [2022-07-13 22:40:11,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:40:11,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:40:12,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:12,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 22:40:12,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:12,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 22:40:12,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:12,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 22:40:12,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:12,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 22:40:12,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:12,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 22:40:12,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:12,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 22:40:12,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:12,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-13 22:40:12,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:12,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-13 22:40:12,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:12,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-13 22:40:12,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:12,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 22:40:12,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:12,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 22:40:12,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:12,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-13 22:40:12,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:12,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-13 22:40:12,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:12,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 22:40:12,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:12,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-13 22:40:12,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:12,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-07-13 22:40:12,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:12,560 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-13 22:40:12,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:40:12,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556779025] [2022-07-13 22:40:12,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556779025] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:40:12,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558628857] [2022-07-13 22:40:12,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:40:12,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:40:12,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:40:12,564 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:40:12,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-13 22:40:13,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:13,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 2803 conjuncts, 110 conjunts are in the unsatisfiable core [2022-07-13 22:40:13,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:40:13,571 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-13 22:40:13,734 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-13 22:40:13,734 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 19 treesize of output 18 [2022-07-13 22:40:13,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 22:40:13,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 22:40:13,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 22:40:13,782 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-13 22:40:13,782 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 1 case distinctions, treesize of input 27 treesize of output 29 [2022-07-13 22:40:13,793 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-13 22:40:13,793 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 [2022-07-13 22:40:13,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 22:40:13,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 22:40:13,880 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-13 22:40:13,880 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-07-13 22:40:14,118 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-13 22:40:14,118 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 26 treesize of output 10 [2022-07-13 22:40:14,559 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-07-13 22:40:14,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:40:15,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558628857] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:40:15,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 22:40:15,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 24] total 39 [2022-07-13 22:40:15,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921538723] [2022-07-13 22:40:15,045 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 22:40:15,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-13 22:40:15,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:40:15,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-13 22:40:15,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1827, Unknown=0, NotChecked=0, Total=1980 [2022-07-13 22:40:15,048 INFO L87 Difference]: Start difference. First operand 360 states and 400 transitions. Second operand has 39 states, 33 states have (on average 3.1818181818181817) internal successors, (105), 34 states have internal predecessors, (105), 18 states have call successors, (32), 5 states have call predecessors, (32), 5 states have return successors, (31), 15 states have call predecessors, (31), 17 states have call successors, (31) [2022-07-13 22:40:17,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 22:40:17,730 INFO L93 Difference]: Finished difference Result 394 states and 449 transitions. [2022-07-13 22:40:17,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-13 22:40:17,730 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 33 states have (on average 3.1818181818181817) internal successors, (105), 34 states have internal predecessors, (105), 18 states have call successors, (32), 5 states have call predecessors, (32), 5 states have return successors, (31), 15 states have call predecessors, (31), 17 states have call successors, (31) Word has length 158 [2022-07-13 22:40:17,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 22:40:17,732 INFO L225 Difference]: With dead ends: 394 [2022-07-13 22:40:17,732 INFO L226 Difference]: Without dead ends: 392 [2022-07-13 22:40:17,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 188 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=441, Invalid=4251, Unknown=0, NotChecked=0, Total=4692 [2022-07-13 22:40:17,733 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 447 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 3830 mSolverCounterSat, 441 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 4271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 441 IncrementalHoareTripleChecker+Valid, 3830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-13 22:40:17,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [460 Valid, 692 Invalid, 4271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [441 Valid, 3830 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-13 22:40:17,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-07-13 22:40:17,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 366. [2022-07-13 22:40:17,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 275 states have (on average 1.0618181818181818) internal successors, (292), 280 states have internal predecessors, (292), 53 states have call successors, (53), 33 states have call predecessors, (53), 37 states have return successors, (61), 52 states have call predecessors, (61), 52 states have call successors, (61) [2022-07-13 22:40:17,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 406 transitions. [2022-07-13 22:40:17,764 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 406 transitions. Word has length 158 [2022-07-13 22:40:17,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 22:40:17,765 INFO L495 AbstractCegarLoop]: Abstraction has 366 states and 406 transitions. [2022-07-13 22:40:17,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 33 states have (on average 3.1818181818181817) internal successors, (105), 34 states have internal predecessors, (105), 18 states have call successors, (32), 5 states have call predecessors, (32), 5 states have return successors, (31), 15 states have call predecessors, (31), 17 states have call successors, (31) [2022-07-13 22:40:17,765 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 406 transitions. [2022-07-13 22:40:17,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-07-13 22:40:17,766 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 22:40:17,767 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:40:17,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-13 22:40:17,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-07-13 22:40:17,991 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 22:40:17,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:40:17,992 INFO L85 PathProgramCache]: Analyzing trace with hash -880846636, now seen corresponding path program 1 times [2022-07-13 22:40:17,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:40:17,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119315687] [2022-07-13 22:40:17,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:40:17,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:40:18,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:18,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 22:40:18,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:18,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 22:40:18,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:18,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 22:40:18,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:18,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 22:40:18,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:18,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 22:40:18,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:18,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 22:40:18,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:18,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-13 22:40:18,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:18,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-13 22:40:18,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:18,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-13 22:40:18,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:18,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-13 22:40:18,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:18,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-07-13 22:40:18,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:18,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-13 22:40:18,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:18,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-13 22:40:18,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:18,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 22:40:18,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:18,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 22:40:18,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:18,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-13 22:40:18,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:18,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-13 22:40:18,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:18,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2022-07-13 22:40:18,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:18,357 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-07-13 22:40:18,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:40:18,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119315687] [2022-07-13 22:40:18,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119315687] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:40:18,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:40:18,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-13 22:40:18,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972490413] [2022-07-13 22:40:18,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:40:18,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 22:40:18,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:40:18,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 22:40:18,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-07-13 22:40:18,360 INFO L87 Difference]: Start difference. First operand 366 states and 406 transitions. Second operand has 11 states, 10 states have (on average 6.0) internal successors, (60), 8 states have internal predecessors, (60), 5 states have call successors, (20), 5 states have call predecessors, (20), 3 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-07-13 22:40:19,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 22:40:19,022 INFO L93 Difference]: Finished difference Result 468 states and 534 transitions. [2022-07-13 22:40:19,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 22:40:19,023 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 6.0) internal successors, (60), 8 states have internal predecessors, (60), 5 states have call successors, (20), 5 states have call predecessors, (20), 3 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 167 [2022-07-13 22:40:19,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 22:40:19,024 INFO L225 Difference]: With dead ends: 468 [2022-07-13 22:40:19,024 INFO L226 Difference]: Without dead ends: 368 [2022-07-13 22:40:19,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-07-13 22:40:19,025 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 157 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 22:40:19,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 564 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 22:40:19,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-07-13 22:40:19,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 367. [2022-07-13 22:40:19,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 276 states have (on average 1.0615942028985508) internal successors, (293), 281 states have internal predecessors, (293), 53 states have call successors, (53), 33 states have call predecessors, (53), 37 states have return successors, (61), 52 states have call predecessors, (61), 52 states have call successors, (61) [2022-07-13 22:40:19,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 407 transitions. [2022-07-13 22:40:19,056 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 407 transitions. Word has length 167 [2022-07-13 22:40:19,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 22:40:19,056 INFO L495 AbstractCegarLoop]: Abstraction has 367 states and 407 transitions. [2022-07-13 22:40:19,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 6.0) internal successors, (60), 8 states have internal predecessors, (60), 5 states have call successors, (20), 5 states have call predecessors, (20), 3 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-07-13 22:40:19,056 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 407 transitions. [2022-07-13 22:40:19,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-07-13 22:40:19,058 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 22:40:19,058 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:40:19,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-13 22:40:19,058 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 22:40:19,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:40:19,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1602985816, now seen corresponding path program 1 times [2022-07-13 22:40:19,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:40:19,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465233735] [2022-07-13 22:40:19,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:40:19,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:40:19,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:19,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 22:40:19,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:19,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 22:40:19,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:19,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 22:40:19,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:19,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 22:40:19,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:19,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 22:40:19,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:19,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 22:40:19,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:19,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-13 22:40:19,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:19,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-13 22:40:19,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:19,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-13 22:40:19,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:19,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-07-13 22:40:19,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:19,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 22:40:19,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:19,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 22:40:19,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:19,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-13 22:40:19,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:19,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-13 22:40:19,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:19,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 22:40:19,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:19,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2022-07-13 22:40:19,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:19,998 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-07-13 22:40:19,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:40:19,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465233735] [2022-07-13 22:40:19,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465233735] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:40:19,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:40:19,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-07-13 22:40:20,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466292150] [2022-07-13 22:40:20,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:40:20,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-13 22:40:20,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:40:20,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-13 22:40:20,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-07-13 22:40:20,002 INFO L87 Difference]: Start difference. First operand 367 states and 407 transitions. Second operand has 21 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 16 states have internal predecessors, (57), 10 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 8 states have call predecessors, (16), 9 states have call successors, (16) [2022-07-13 22:40:21,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 22:40:21,089 INFO L93 Difference]: Finished difference Result 391 states and 443 transitions. [2022-07-13 22:40:21,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 22:40:21,089 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 16 states have internal predecessors, (57), 10 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 8 states have call predecessors, (16), 9 states have call successors, (16) Word has length 159 [2022-07-13 22:40:21,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 22:40:21,091 INFO L225 Difference]: With dead ends: 391 [2022-07-13 22:40:21,091 INFO L226 Difference]: Without dead ends: 389 [2022-07-13 22:40:21,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2022-07-13 22:40:21,092 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 264 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 1387 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 1646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 1387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-13 22:40:21,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 299 Invalid, 1646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 1387 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-13 22:40:21,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-07-13 22:40:21,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 375. [2022-07-13 22:40:21,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 281 states have (on average 1.0640569395017794) internal successors, (299), 287 states have internal predecessors, (299), 55 states have call successors, (55), 34 states have call predecessors, (55), 38 states have return successors, (63), 53 states have call predecessors, (63), 54 states have call successors, (63) [2022-07-13 22:40:21,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 417 transitions. [2022-07-13 22:40:21,140 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 417 transitions. Word has length 159 [2022-07-13 22:40:21,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 22:40:21,141 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 417 transitions. [2022-07-13 22:40:21,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 16 states have internal predecessors, (57), 10 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 8 states have call predecessors, (16), 9 states have call successors, (16) [2022-07-13 22:40:21,141 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 417 transitions. [2022-07-13 22:40:21,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-07-13 22:40:21,142 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 22:40:21,142 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1] [2022-07-13 22:40:21,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-07-13 22:40:21,143 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 22:40:21,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:40:21,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1309589061, now seen corresponding path program 1 times [2022-07-13 22:40:21,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:40:21,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453037637] [2022-07-13 22:40:21,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:40:21,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:40:21,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:21,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 22:40:21,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:21,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 22:40:21,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:21,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 22:40:21,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:21,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 22:40:21,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:21,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 22:40:21,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:21,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 22:40:21,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:21,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-13 22:40:21,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:21,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-13 22:40:21,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:21,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-13 22:40:21,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:21,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 22:40:21,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:21,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 22:40:21,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:21,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-13 22:40:21,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:21,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-13 22:40:21,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:21,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 22:40:21,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:21,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-07-13 22:40:21,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:21,398 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2022-07-13 22:40:21,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:40:21,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453037637] [2022-07-13 22:40:21,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453037637] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:40:21,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:40:21,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-13 22:40:21,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688347170] [2022-07-13 22:40:21,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:40:21,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 22:40:21,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:40:21,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 22:40:21,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-13 22:40:21,402 INFO L87 Difference]: Start difference. First operand 375 states and 417 transitions. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 7 states have internal predecessors, (58), 5 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-07-13 22:40:21,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 22:40:21,875 INFO L93 Difference]: Finished difference Result 422 states and 471 transitions. [2022-07-13 22:40:21,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 22:40:21,875 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 7 states have internal predecessors, (58), 5 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 159 [2022-07-13 22:40:21,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 22:40:21,880 INFO L225 Difference]: With dead ends: 422 [2022-07-13 22:40:21,881 INFO L226 Difference]: Without dead ends: 377 [2022-07-13 22:40:21,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-07-13 22:40:21,882 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 210 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 22:40:21,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 234 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 22:40:21,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-07-13 22:40:21,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 375. [2022-07-13 22:40:21,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 281 states have (on average 1.0533807829181494) internal successors, (296), 287 states have internal predecessors, (296), 55 states have call successors, (55), 34 states have call predecessors, (55), 38 states have return successors, (63), 53 states have call predecessors, (63), 54 states have call successors, (63) [2022-07-13 22:40:21,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 414 transitions. [2022-07-13 22:40:21,916 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 414 transitions. Word has length 159 [2022-07-13 22:40:21,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 22:40:21,916 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 414 transitions. [2022-07-13 22:40:21,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 7 states have internal predecessors, (58), 5 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-07-13 22:40:21,917 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 414 transitions. [2022-07-13 22:40:21,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-07-13 22:40:21,918 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 22:40:21,918 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:40:21,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-07-13 22:40:21,919 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 22:40:21,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:40:21,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1189755825, now seen corresponding path program 1 times [2022-07-13 22:40:21,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:40:21,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355048360] [2022-07-13 22:40:21,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:40:21,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:40:22,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:22,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 22:40:22,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:22,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 22:40:22,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:22,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 22:40:22,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:22,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 22:40:22,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:22,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 22:40:22,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:22,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 22:40:22,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:22,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-13 22:40:22,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:22,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-13 22:40:22,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:22,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-07-13 22:40:22,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:22,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-07-13 22:40:22,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:22,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-07-13 22:40:22,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:22,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-07-13 22:40:22,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:22,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 22:40:22,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:22,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 22:40:22,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:22,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-13 22:40:22,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:22,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-13 22:40:22,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:22,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-13 22:40:22,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:22,345 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-07-13 22:40:22,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:40:22,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355048360] [2022-07-13 22:40:22,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355048360] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:40:22,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16651166] [2022-07-13 22:40:22,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:40:22,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:40:22,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:40:22,347 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:40:22,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-13 22:40:22,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:40:22,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 2872 conjuncts, 110 conjunts are in the unsatisfiable core [2022-07-13 22:40:22,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:40:22,866 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 [2022-07-13 22:40:23,052 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-13 22:40:23,052 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 [2022-07-13 22:40:23,084 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-13 22:40:25,111 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_write_be16_harness_~#buf~3#1.base_BEFORE_CALL_70| Int)) (not (= |v_ULTIMATE.start_aws_byte_buf_write_be16_harness_~#buf~3#1.base_BEFORE_CALL_70| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_write_be16_harness_~#buf~3#1.base_BEFORE_CALL_70|) 8)))) is different from true [2022-07-13 22:40:42,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 22:40:42,262 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-07-13 22:40:42,279 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-13 22:40:42,279 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 19 treesize of output 25 [2022-07-13 22:40:42,288 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 10 treesize of output 6 [2022-07-13 22:40:44,329 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_write_be16_~buf#1.base_BEFORE_CALL_35| Int)) (not (= |v_ULTIMATE.start_aws_byte_buf_write_be16_~buf#1.base_BEFORE_CALL_35| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_write_be16_~buf#1.base_BEFORE_CALL_35|) 8)))) is different from true [2022-07-13 22:40:46,411 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_write_be16_~buf#1.base_BEFORE_CALL_36| Int)) (not (= |v_ULTIMATE.start_aws_byte_buf_write_be16_~buf#1.base_BEFORE_CALL_36| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_write_be16_~buf#1.base_BEFORE_CALL_36|) 8)))) is different from true [2022-07-13 22:40:46,490 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-13 22:40:46,490 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 29 [2022-07-13 22:40:46,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 22:40:46,495 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-07-13 22:40:46,500 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 10 treesize of output 6 [2022-07-13 22:40:48,595 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_aws_byte_buf_write_~buf.base_BEFORE_CALL_77 Int)) (not (= (select (select |c_#memory_$Pointer$.base| v_aws_byte_buf_write_~buf.base_BEFORE_CALL_77) 8) v_aws_byte_buf_write_~buf.base_BEFORE_CALL_77))) is different from true [2022-07-13 22:41:13,834 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3199 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_memcpy_impl_#in~dst.base| v_ArrVal_3199))) is different from true [2022-07-13 22:41:13,845 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3199 (Array Int Int))) (= (store |c_old(#memory_int)| |c_my_memcpy_#in~dst.base| v_ArrVal_3199) |c_#memory_int|)) is different from true [2022-07-13 22:41:13,854 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 23 treesize of output 11 [2022-07-13 22:41:13,857 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-07-13 22:41:13,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 22:41:13,911 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 24 treesize of output 23 [2022-07-13 22:41:20,310 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 16 proven. 94 refuted. 15 times theorem prover too weak. 47 trivial. 69 not checked. [2022-07-13 22:41:20,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:41:20,618 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3207 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_aws_byte_buf_write_#t~mem1174.base| v_ArrVal_3207) c_aws_byte_buf_write_~buf.base) (+ c_aws_byte_buf_write_~buf.offset 16)) 18446744073709551616) 0))) is different from false [2022-07-13 22:41:20,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16651166] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:41:20,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 22:41:20,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 37] total 48 [2022-07-13 22:41:20,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891264736] [2022-07-13 22:41:20,620 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 22:41:20,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-13 22:41:20,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:41:20,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-13 22:41:20,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1927, Unknown=16, NotChecked=658, Total=2756 [2022-07-13 22:41:20,621 INFO L87 Difference]: Start difference. First operand 375 states and 414 transitions. Second operand has 48 states, 43 states have (on average 3.604651162790698) internal successors, (155), 38 states have internal predecessors, (155), 18 states have call successors, (37), 16 states have call predecessors, (37), 12 states have return successors, (34), 15 states have call predecessors, (34), 17 states have call successors, (34)