./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be16_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_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 f6da3aa04741dedcde0205dc04a8136a445ebd58b30adbc60377ecda455d64bb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-16 20:56:21,890 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-16 20:56:21,903 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-16 20:56:21,939 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-16 20:56:21,940 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-16 20:56:21,941 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-16 20:56:21,942 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-16 20:56:21,943 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-16 20:56:21,944 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-16 20:56:21,945 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-16 20:56:21,946 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-16 20:56:21,947 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-16 20:56:21,947 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-16 20:56:21,948 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-16 20:56:21,949 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-16 20:56:21,950 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-16 20:56:21,951 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-16 20:56:21,951 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-16 20:56:21,953 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-16 20:56:21,954 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-16 20:56:21,955 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-16 20:56:21,956 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-16 20:56:21,957 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-16 20:56:21,958 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-16 20:56:21,960 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-16 20:56:21,960 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-16 20:56:21,960 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-16 20:56:21,961 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-16 20:56:21,961 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-16 20:56:21,962 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-16 20:56:21,962 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-16 20:56:21,963 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-16 20:56:21,964 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-16 20:56:21,964 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-16 20:56:21,965 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-16 20:56:21,965 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-16 20:56:21,966 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-16 20:56:21,966 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-16 20:56:21,967 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-16 20:56:21,967 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-16 20:56:21,968 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-16 20:56:21,969 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-16 20:56:21,993 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-16 20:56:21,994 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-16 20:56:21,995 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-16 20:56:21,995 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-16 20:56:21,996 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-16 20:56:21,996 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-16 20:56:21,997 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-16 20:56:21,997 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-16 20:56:21,997 INFO L138 SettingsManager]: * Use SBE=true [2021-11-16 20:56:21,998 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-16 20:56:21,998 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-16 20:56:21,998 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-16 20:56:21,999 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-16 20:56:21,999 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-16 20:56:21,999 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-16 20:56:21,999 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-16 20:56:21,999 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-16 20:56:21,999 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-16 20:56:22,000 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-16 20:56:22,000 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-16 20:56:22,000 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-16 20:56:22,000 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-16 20:56:22,001 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-16 20:56:22,001 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-16 20:56:22,001 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-16 20:56:22,001 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-16 20:56:22,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-16 20:56:22,002 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-16 20:56:22,002 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-16 20:56:22,002 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-16 20:56:22,003 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-16 20:56:22,003 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f6da3aa04741dedcde0205dc04a8136a445ebd58b30adbc60377ecda455d64bb [2021-11-16 20:56:22,244 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-16 20:56:22,267 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-16 20:56:22,269 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-16 20:56:22,270 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-16 20:56:22,270 INFO L275 PluginConnector]: CDTParser initialized [2021-11-16 20:56:22,271 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be16_harness.i [2021-11-16 20:56:22,341 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4b07415b/f9aa83a94341406f9856c11a8427e94c/FLAGd2a7bbbf2 [2021-11-16 20:56:23,009 INFO L306 CDTParser]: Found 1 translation units. [2021-11-16 20:56:23,010 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be16_harness.i [2021-11-16 20:56:23,054 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4b07415b/f9aa83a94341406f9856c11a8427e94c/FLAGd2a7bbbf2 [2021-11-16 20:56:23,111 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4b07415b/f9aa83a94341406f9856c11a8427e94c [2021-11-16 20:56:23,113 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-16 20:56:23,115 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-16 20:56:23,119 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-16 20:56:23,120 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-16 20:56:23,122 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-16 20:56:23,122 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:56:23" (1/1) ... [2021-11-16 20:56:23,123 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c5fe90d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:56:23, skipping insertion in model container [2021-11-16 20:56:23,123 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:56:23" (1/1) ... [2021-11-16 20:56:23,132 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-16 20:56:23,235 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-16 20:56:23,479 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be16_harness.i[4499,4512] [2021-11-16 20:56:23,487 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be16_harness.i[4559,4572] [2021-11-16 20:56:23,513 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-16 20:56:23,520 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-16 20:56:24,149 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:56:24,149 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:56:24,150 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:56:24,150 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:56:24,151 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:56:24,161 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:56:24,162 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:56:24,164 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:56:24,164 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:56:24,409 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-16 20:56:24,411 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-16 20:56:24,412 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-16 20:56:24,413 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-16 20:56:24,414 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-16 20:56:24,414 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-16 20:56:24,415 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-16 20:56:24,415 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-16 20:56:24,416 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-16 20:56:24,416 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-16 20:56:24,559 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-16 20:56:24,718 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:56:24,719 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:56:24,802 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-16 20:56:24,854 INFO L203 MainTranslator]: Completed pre-run [2021-11-16 20:56:24,870 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be16_harness.i[4499,4512] [2021-11-16 20:56:24,877 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be16_harness.i[4559,4572] [2021-11-16 20:56:24,879 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-16 20:56:24,879 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-16 20:56:24,903 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:56:24,904 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:56:24,905 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:56:24,905 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:56:24,906 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:56:24,911 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:56:24,911 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:56:24,912 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:56:24,912 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:56:24,946 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-16 20:56:24,947 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-16 20:56:24,947 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-16 20:56:24,948 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-16 20:56:24,950 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-16 20:56:24,951 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-16 20:56:24,951 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-16 20:56:24,952 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-16 20:56:24,952 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-16 20:56:24,952 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-16 20:56:24,982 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-16 20:56:25,064 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:56:25,064 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:56:25,092 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-16 20:56:25,301 INFO L208 MainTranslator]: Completed translation [2021-11-16 20:56:25,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:56:25 WrapperNode [2021-11-16 20:56:25,301 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-16 20:56:25,302 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-16 20:56:25,302 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-16 20:56:25,303 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-16 20:56:25,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:56:25" (1/1) ... [2021-11-16 20:56:25,404 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:56:25" (1/1) ... [2021-11-16 20:56:25,488 INFO L137 Inliner]: procedures = 693, calls = 2647, calls flagged for inlining = 61, calls inlined = 11, statements flattened = 971 [2021-11-16 20:56:25,489 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-16 20:56:25,490 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-16 20:56:25,490 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-16 20:56:25,490 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-16 20:56:25,499 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:56:25" (1/1) ... [2021-11-16 20:56:25,499 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:56:25" (1/1) ... [2021-11-16 20:56:25,512 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:56:25" (1/1) ... [2021-11-16 20:56:25,512 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:56:25" (1/1) ... [2021-11-16 20:56:25,547 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:56:25" (1/1) ... [2021-11-16 20:56:25,551 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:56:25" (1/1) ... [2021-11-16 20:56:25,557 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:56:25" (1/1) ... [2021-11-16 20:56:25,581 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-16 20:56:25,590 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-16 20:56:25,590 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-16 20:56:25,590 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-16 20:56:25,591 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:56:25" (1/1) ... [2021-11-16 20:56:25,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-16 20:56:25,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:56:25,633 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-16 20:56:25,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-16 20:56:25,677 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_read [2021-11-16 20:56:25,677 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_read [2021-11-16 20:56:25,677 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2021-11-16 20:56:25,678 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2021-11-16 20:56:25,678 INFO L130 BoogieDeclarations]: Found specification of procedure ntohs [2021-11-16 20:56:25,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-16 20:56:25,679 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-16 20:56:25,679 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-16 20:56:25,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~real [2021-11-16 20:56:25,680 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-16 20:56:25,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-16 20:56:25,681 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-16 20:56:25,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-16 20:56:25,681 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-16 20:56:25,681 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-16 20:56:25,681 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-16 20:56:25,682 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-16 20:56:25,682 INFO L130 BoogieDeclarations]: Found specification of procedure aws_ntoh16 [2021-11-16 20:56:25,682 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_ntoh16 [2021-11-16 20:56:25,682 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-16 20:56:25,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-16 20:56:25,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-16 20:56:25,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-16 20:56:25,683 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-16 20:56:25,683 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-16 20:56:25,683 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-11-16 20:56:25,684 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-11-16 20:56:25,684 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-16 20:56:25,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-16 20:56:25,685 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2021-11-16 20:56:25,685 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2021-11-16 20:56:25,685 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-16 20:56:25,685 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-16 20:56:25,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-16 20:56:25,685 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-16 20:56:25,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-16 20:56:25,685 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-16 20:56:25,686 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-16 20:56:25,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-16 20:56:25,686 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~real [2021-11-16 20:56:25,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-16 20:56:25,982 INFO L236 CfgBuilder]: Building ICFG [2021-11-16 20:56:25,984 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-16 20:56:27,635 INFO L277 CfgBuilder]: Performing block encoding [2021-11-16 20:56:27,645 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-16 20:56:27,645 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-16 20:56:27,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:56:27 BoogieIcfgContainer [2021-11-16 20:56:27,648 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-16 20:56:27,650 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-16 20:56:27,651 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-16 20:56:27,653 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-16 20:56:27,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 08:56:23" (1/3) ... [2021-11-16 20:56:27,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cf3e5fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:56:27, skipping insertion in model container [2021-11-16 20:56:27,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:56:25" (2/3) ... [2021-11-16 20:56:27,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cf3e5fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:56:27, skipping insertion in model container [2021-11-16 20:56:27,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:56:27" (3/3) ... [2021-11-16 20:56:27,657 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_cursor_read_be16_harness.i [2021-11-16 20:56:27,661 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-16 20:56:27,661 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-16 20:56:27,710 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-16 20:56:27,722 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-16 20:56:27,723 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-16 20:56:27,743 INFO L276 IsEmpty]: Start isEmpty. Operand has 158 states, 97 states have (on average 1.2268041237113403) internal successors, (119), 98 states have internal predecessors, (119), 48 states have call successors, (48), 11 states have call predecessors, (48), 11 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2021-11-16 20:56:27,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-16 20:56:27,758 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:56:27,758 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:56:27,759 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:56:27,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:56:27,764 INFO L85 PathProgramCache]: Analyzing trace with hash -995370876, now seen corresponding path program 1 times [2021-11-16 20:56:27,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:56:27,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107784332] [2021-11-16 20:56:27,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:56:27,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:56:28,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:28,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:56:28,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:28,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:56:28,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:28,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 20:56:28,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:28,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:56:28,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:28,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 20:56:28,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:28,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 20:56:28,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:28,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:56:28,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:28,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:56:28,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:28,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-16 20:56:28,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:28,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-16 20:56:28,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:28,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-16 20:56:28,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:28,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-16 20:56:28,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:28,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-16 20:56:28,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:28,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-16 20:56:28,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:28,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-16 20:56:28,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:28,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-16 20:56:28,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:28,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-16 20:56:28,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:28,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-11-16 20:56:28,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:28,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-16 20:56:28,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:28,470 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2021-11-16 20:56:28,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:56:28,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107784332] [2021-11-16 20:56:28,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107784332] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:56:28,472 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:56:28,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-16 20:56:28,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084773833] [2021-11-16 20:56:28,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:56:28,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-16 20:56:28,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:56:28,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-16 20:56:28,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-16 20:56:28,501 INFO L87 Difference]: Start difference. First operand has 158 states, 97 states have (on average 1.2268041237113403) internal successors, (119), 98 states have internal predecessors, (119), 48 states have call successors, (48), 11 states have call predecessors, (48), 11 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-16 20:56:29,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:56:29,782 INFO L93 Difference]: Finished difference Result 316 states and 460 transitions. [2021-11-16 20:56:29,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 20:56:29,785 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 124 [2021-11-16 20:56:29,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:56:29,797 INFO L225 Difference]: With dead ends: 316 [2021-11-16 20:56:29,797 INFO L226 Difference]: Without dead ends: 159 [2021-11-16 20:56:29,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-16 20:56:29,813 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 109 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-16 20:56:29,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 275 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-16 20:56:29,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-16 20:56:29,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 152. [2021-11-16 20:56:29,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 92 states have (on average 1.2173913043478262) internal successors, (112), 93 states have internal predecessors, (112), 48 states have call successors, (48), 11 states have call predecessors, (48), 11 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2021-11-16 20:56:29,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 207 transitions. [2021-11-16 20:56:29,877 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 207 transitions. Word has length 124 [2021-11-16 20:56:29,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:56:29,878 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 207 transitions. [2021-11-16 20:56:29,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-16 20:56:29,878 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 207 transitions. [2021-11-16 20:56:29,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-16 20:56:29,886 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:56:29,887 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:56:29,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-16 20:56:29,887 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:56:29,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:56:29,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1202675202, now seen corresponding path program 1 times [2021-11-16 20:56:29,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:56:29,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934671543] [2021-11-16 20:56:29,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:56:29,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:56:29,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:30,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:56:30,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:30,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:56:30,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:30,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 20:56:30,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:30,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:56:30,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:30,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 20:56:30,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:30,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 20:56:30,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:30,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:56:30,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:30,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:56:30,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:30,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-16 20:56:30,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:30,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-16 20:56:30,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:30,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-16 20:56:30,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:30,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-16 20:56:30,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:30,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-16 20:56:30,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:30,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-16 20:56:30,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:30,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-16 20:56:30,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:30,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-16 20:56:30,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:30,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-16 20:56:30,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:30,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-11-16 20:56:30,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:30,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-16 20:56:30,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:30,302 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2021-11-16 20:56:30,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:56:30,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934671543] [2021-11-16 20:56:30,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934671543] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:56:30,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775022429] [2021-11-16 20:56:30,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:56:30,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:56:30,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:56:30,315 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:56:30,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-16 20:56:30,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:30,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 2665 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-16 20:56:30,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:56:31,173 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-11-16 20:56:31,174 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:56:31,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775022429] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:56:31,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:56:31,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2021-11-16 20:56:31,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795511911] [2021-11-16 20:56:31,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:56:31,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-16 20:56:31,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:56:31,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-16 20:56:31,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-16 20:56:31,177 INFO L87 Difference]: Start difference. First operand 152 states and 207 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-16 20:56:31,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:56:31,394 INFO L93 Difference]: Finished difference Result 280 states and 393 transitions. [2021-11-16 20:56:31,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-16 20:56:31,395 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 124 [2021-11-16 20:56:31,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:56:31,397 INFO L225 Difference]: With dead ends: 280 [2021-11-16 20:56:31,397 INFO L226 Difference]: Without dead ends: 155 [2021-11-16 20:56:31,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-11-16 20:56:31,399 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 230 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-16 20:56:31,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 428 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-16 20:56:31,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-16 20:56:31,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2021-11-16 20:56:31,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 94 states have (on average 1.2127659574468086) internal successors, (114), 96 states have internal predecessors, (114), 48 states have call successors, (48), 11 states have call predecessors, (48), 12 states have return successors, (55), 47 states have call predecessors, (55), 47 states have call successors, (55) [2021-11-16 20:56:31,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 217 transitions. [2021-11-16 20:56:31,436 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 217 transitions. Word has length 124 [2021-11-16 20:56:31,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:56:31,436 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 217 transitions. [2021-11-16 20:56:31,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-16 20:56:31,437 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 217 transitions. [2021-11-16 20:56:31,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-16 20:56:31,443 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:56:31,443 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:56:31,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-16 20:56:31,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:56:31,657 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:56:31,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:56:31,658 INFO L85 PathProgramCache]: Analyzing trace with hash 2041589987, now seen corresponding path program 1 times [2021-11-16 20:56:31,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:56:31,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406223177] [2021-11-16 20:56:31,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:56:31,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:56:31,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:31,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:56:31,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:31,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:56:31,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:31,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 20:56:31,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:31,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:56:31,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:31,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-16 20:56:31,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:31,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-16 20:56:31,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:31,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-16 20:56:31,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:31,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-16 20:56:31,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:31,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-16 20:56:31,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:32,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-16 20:56:32,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:32,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-16 20:56:32,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:32,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-16 20:56:32,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:32,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-16 20:56:32,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:32,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-16 20:56:32,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:32,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-16 20:56:32,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:32,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-16 20:56:32,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:32,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-16 20:56:32,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:32,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-16 20:56:32,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:32,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-11-16 20:56:32,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:32,122 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-16 20:56:32,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:56:32,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406223177] [2021-11-16 20:56:32,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406223177] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:56:32,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076333794] [2021-11-16 20:56:32,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:56:32,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:56:32,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:56:32,124 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:56:32,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-16 20:56:32,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:32,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 2670 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-16 20:56:32,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:56:32,924 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-16 20:56:32,925 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:56:32,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076333794] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:56:32,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:56:32,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 16 [2021-11-16 20:56:32,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145120899] [2021-11-16 20:56:32,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:56:32,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-16 20:56:32,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:56:32,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-16 20:56:32,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-11-16 20:56:32,928 INFO L87 Difference]: Start difference. First operand 155 states and 217 transitions. Second operand has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 7 states have internal predecessors, (55), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 4 states have call successors, (19) [2021-11-16 20:56:33,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:56:33,199 INFO L93 Difference]: Finished difference Result 266 states and 374 transitions. [2021-11-16 20:56:33,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-16 20:56:33,199 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 7 states have internal predecessors, (55), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 4 states have call successors, (19) Word has length 126 [2021-11-16 20:56:33,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:56:33,201 INFO L225 Difference]: With dead ends: 266 [2021-11-16 20:56:33,201 INFO L226 Difference]: Without dead ends: 155 [2021-11-16 20:56:33,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-11-16 20:56:33,203 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 248 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-16 20:56:33,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 566 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-16 20:56:33,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-16 20:56:33,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2021-11-16 20:56:33,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 94 states have (on average 1.2127659574468086) internal successors, (114), 96 states have internal predecessors, (114), 48 states have call successors, (48), 11 states have call predecessors, (48), 12 states have return successors, (53), 47 states have call predecessors, (53), 47 states have call successors, (53) [2021-11-16 20:56:33,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 215 transitions. [2021-11-16 20:56:33,216 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 215 transitions. Word has length 126 [2021-11-16 20:56:33,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:56:33,216 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 215 transitions. [2021-11-16 20:56:33,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 7 states have internal predecessors, (55), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 4 states have call successors, (19) [2021-11-16 20:56:33,217 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 215 transitions. [2021-11-16 20:56:33,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-16 20:56:33,218 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:56:33,218 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:56:33,238 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-16 20:56:33,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-16 20:56:33,423 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:56:33,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:56:33,424 INFO L85 PathProgramCache]: Analyzing trace with hash 827031262, now seen corresponding path program 2 times [2021-11-16 20:56:33,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:56:33,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747938343] [2021-11-16 20:56:33,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:56:33,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:56:33,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:33,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:56:33,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:33,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:56:33,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:33,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 20:56:33,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:33,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:56:33,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:33,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-16 20:56:33,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:33,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-16 20:56:33,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:33,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-16 20:56:33,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:33,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-16 20:56:33,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:33,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-16 20:56:33,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:33,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-16 20:56:33,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:33,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-16 20:56:33,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:33,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-16 20:56:33,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:33,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-11-16 20:56:33,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:33,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-16 20:56:33,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:33,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-11-16 20:56:33,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:33,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-16 20:56:33,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:33,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-16 20:56:33,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:33,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-16 20:56:33,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:33,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-11-16 20:56:33,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:33,794 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-16 20:56:33,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:56:33,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747938343] [2021-11-16 20:56:33,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747938343] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:56:33,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189806126] [2021-11-16 20:56:33,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-16 20:56:33,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:56:33,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:56:33,796 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:56:33,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-16 20:56:34,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-16 20:56:34,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 20:56:34,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 2675 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-16 20:56:34,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:56:35,300 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2021-11-16 20:56:35,300 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:56:35,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189806126] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:56:35,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:56:35,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [13] total 21 [2021-11-16 20:56:35,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745914643] [2021-11-16 20:56:35,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:56:35,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-16 20:56:35,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:56:35,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-16 20:56:35,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-11-16 20:56:35,303 INFO L87 Difference]: Start difference. First operand 155 states and 215 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 6 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) [2021-11-16 20:56:35,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:56:35,785 INFO L93 Difference]: Finished difference Result 260 states and 361 transitions. [2021-11-16 20:56:35,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-16 20:56:35,786 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 6 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) Word has length 128 [2021-11-16 20:56:35,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:56:35,787 INFO L225 Difference]: With dead ends: 260 [2021-11-16 20:56:35,788 INFO L226 Difference]: Without dead ends: 155 [2021-11-16 20:56:35,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2021-11-16 20:56:35,789 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 280 mSDsluCounter, 885 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 1029 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-16 20:56:35,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 1029 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-16 20:56:35,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-16 20:56:35,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2021-11-16 20:56:35,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 94 states have (on average 1.2127659574468086) internal successors, (114), 96 states have internal predecessors, (114), 48 states have call successors, (48), 11 states have call predecessors, (48), 12 states have return successors, (48), 47 states have call predecessors, (48), 47 states have call successors, (48) [2021-11-16 20:56:35,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 210 transitions. [2021-11-16 20:56:35,805 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 210 transitions. Word has length 128 [2021-11-16 20:56:35,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:56:35,805 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 210 transitions. [2021-11-16 20:56:35,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 6 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) [2021-11-16 20:56:35,806 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 210 transitions. [2021-11-16 20:56:35,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-16 20:56:35,807 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:56:35,807 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:56:35,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-16 20:56:36,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:56:36,036 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:56:36,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:56:36,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1812113485, now seen corresponding path program 1 times [2021-11-16 20:56:36,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:56:36,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241149424] [2021-11-16 20:56:36,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:56:36,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:56:36,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:36,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:56:36,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:36,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:56:36,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:36,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 20:56:36,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:36,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:56:36,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:36,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-16 20:56:36,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:36,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-16 20:56:36,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:36,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-16 20:56:36,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:36,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-16 20:56:36,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:36,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-16 20:56:36,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:36,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-16 20:56:36,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:36,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-16 20:56:36,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:36,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-16 20:56:36,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:36,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-11-16 20:56:36,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:36,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-16 20:56:36,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:36,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-16 20:56:36,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:36,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-16 20:56:36,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:36,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-11-16 20:56:36,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:36,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-16 20:56:36,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:36,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-11-16 20:56:36,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:36,486 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2021-11-16 20:56:36,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:56:36,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241149424] [2021-11-16 20:56:36,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241149424] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:56:36,487 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:56:36,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-16 20:56:36,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215569988] [2021-11-16 20:56:36,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:56:36,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-16 20:56:36,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:56:36,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-16 20:56:36,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-16 20:56:36,489 INFO L87 Difference]: Start difference. First operand 155 states and 210 transitions. Second operand has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-11-16 20:56:38,094 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:56:39,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:56:39,049 INFO L93 Difference]: Finished difference Result 174 states and 241 transitions. [2021-11-16 20:56:39,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-16 20:56:39,055 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) Word has length 134 [2021-11-16 20:56:39,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:56:39,057 INFO L225 Difference]: With dead ends: 174 [2021-11-16 20:56:39,057 INFO L226 Difference]: Without dead ends: 172 [2021-11-16 20:56:39,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-11-16 20:56:39,058 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 131 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 1096 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-16 20:56:39,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 1096 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-16 20:56:39,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-16 20:56:39,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 164. [2021-11-16 20:56:39,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 100 states have (on average 1.2) internal successors, (120), 103 states have internal predecessors, (120), 49 states have call successors, (49), 12 states have call predecessors, (49), 14 states have return successors, (59), 48 states have call predecessors, (59), 48 states have call successors, (59) [2021-11-16 20:56:39,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 228 transitions. [2021-11-16 20:56:39,072 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 228 transitions. Word has length 134 [2021-11-16 20:56:39,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:56:39,073 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 228 transitions. [2021-11-16 20:56:39,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-11-16 20:56:39,073 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 228 transitions. [2021-11-16 20:56:39,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-16 20:56:39,075 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:56:39,075 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 5, 5, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:56:39,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-16 20:56:39,076 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:56:39,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:56:39,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1740099605, now seen corresponding path program 1 times [2021-11-16 20:56:39,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:56:39,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601104214] [2021-11-16 20:56:39,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:56:39,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:56:39,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:39,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:56:39,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:39,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:56:39,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:39,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 20:56:39,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:39,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:56:39,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:39,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-16 20:56:39,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:39,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-16 20:56:39,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:39,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-16 20:56:39,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:39,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-16 20:56:39,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:39,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-16 20:56:39,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:39,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-16 20:56:39,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:39,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-16 20:56:39,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:39,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-16 20:56:39,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:39,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-11-16 20:56:39,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:39,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-16 20:56:39,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:39,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-16 20:56:39,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:39,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-16 20:56:39,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:39,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-11-16 20:56:39,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:39,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-16 20:56:39,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:39,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-11-16 20:56:39,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:39,559 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2021-11-16 20:56:39,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:56:39,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601104214] [2021-11-16 20:56:39,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601104214] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:56:39,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696935179] [2021-11-16 20:56:39,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:56:39,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:56:39,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:56:39,564 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:56:39,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-16 20:56:39,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:39,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 2702 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-16 20:56:40,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:56:40,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-16 20:56:40,608 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 84 proven. 4 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-11-16 20:56:40,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:56:41,255 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-16 20:56:41,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2021-11-16 20:56:41,292 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-16 20:56:41,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696935179] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 20:56:41,292 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 20:56:41,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 12] total 29 [2021-11-16 20:56:41,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260943538] [2021-11-16 20:56:41,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 20:56:41,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-16 20:56:41,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:56:41,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-16 20:56:41,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=745, Unknown=0, NotChecked=0, Total=812 [2021-11-16 20:56:41,294 INFO L87 Difference]: Start difference. First operand 164 states and 228 transitions. Second operand has 29 states, 26 states have (on average 4.5) internal successors, (117), 21 states have internal predecessors, (117), 11 states have call successors, (56), 7 states have call predecessors, (56), 8 states have return successors, (53), 10 states have call predecessors, (53), 10 states have call successors, (53) [2021-11-16 20:56:43,377 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:56:46,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:56:46,526 INFO L93 Difference]: Finished difference Result 329 states and 462 transitions. [2021-11-16 20:56:46,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-16 20:56:46,527 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 4.5) internal successors, (117), 21 states have internal predecessors, (117), 11 states have call successors, (56), 7 states have call predecessors, (56), 8 states have return successors, (53), 10 states have call predecessors, (53), 10 states have call successors, (53) Word has length 138 [2021-11-16 20:56:46,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:56:46,528 INFO L225 Difference]: With dead ends: 329 [2021-11-16 20:56:46,528 INFO L226 Difference]: Without dead ends: 169 [2021-11-16 20:56:46,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 299 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=210, Invalid=1952, Unknown=0, NotChecked=0, Total=2162 [2021-11-16 20:56:46,530 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 184 mSDsluCounter, 2337 mSDsCounter, 0 mSdLazyCounter, 2463 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 2500 SdHoareTripleChecker+Invalid, 2811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 2463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 206 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-16 20:56:46,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 2500 Invalid, 2811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 2463 Invalid, 0 Unknown, 206 Unchecked, 4.7s Time] [2021-11-16 20:56:46,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-11-16 20:56:46,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 164. [2021-11-16 20:56:46,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 100 states have (on average 1.19) internal successors, (119), 103 states have internal predecessors, (119), 49 states have call successors, (49), 12 states have call predecessors, (49), 14 states have return successors, (58), 48 states have call predecessors, (58), 48 states have call successors, (58) [2021-11-16 20:56:46,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 226 transitions. [2021-11-16 20:56:46,549 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 226 transitions. Word has length 138 [2021-11-16 20:56:46,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:56:46,549 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 226 transitions. [2021-11-16 20:56:46,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 4.5) internal successors, (117), 21 states have internal predecessors, (117), 11 states have call successors, (56), 7 states have call predecessors, (56), 8 states have return successors, (53), 10 states have call predecessors, (53), 10 states have call successors, (53) [2021-11-16 20:56:46,549 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 226 transitions. [2021-11-16 20:56:46,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-16 20:56:46,551 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:56:46,551 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:56:46,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-16 20:56:46,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:56:46,771 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:56:46,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:56:46,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1379257026, now seen corresponding path program 1 times [2021-11-16 20:56:46,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:56:46,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588425176] [2021-11-16 20:56:46,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:56:46,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:56:46,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:47,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:56:47,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:47,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:56:47,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:47,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:56:47,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:47,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:56:47,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:47,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-16 20:56:47,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:47,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-16 20:56:47,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:47,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:56:47,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:47,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 20:56:47,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:47,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-16 20:56:47,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:47,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-16 20:56:47,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:47,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-16 20:56:47,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:47,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-16 20:56:47,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:47,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-11-16 20:56:47,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:47,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-16 20:56:47,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:47,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-16 20:56:47,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:47,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-11-16 20:56:47,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:47,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-16 20:56:47,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:47,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-11-16 20:56:47,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:47,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-16 20:56:47,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:47,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-11-16 20:56:47,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:47,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-11-16 20:56:47,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:47,209 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2021-11-16 20:56:47,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:56:47,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588425176] [2021-11-16 20:56:47,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588425176] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:56:47,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:56:47,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-16 20:56:47,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654947869] [2021-11-16 20:56:47,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:56:47,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-16 20:56:47,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:56:47,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-16 20:56:47,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-16 20:56:47,212 INFO L87 Difference]: Start difference. First operand 164 states and 226 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (23), 4 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-16 20:56:48,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:56:48,452 INFO L93 Difference]: Finished difference Result 295 states and 412 transitions. [2021-11-16 20:56:48,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-16 20:56:48,453 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (23), 4 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 153 [2021-11-16 20:56:48,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:56:48,455 INFO L225 Difference]: With dead ends: 295 [2021-11-16 20:56:48,455 INFO L226 Difference]: Without dead ends: 171 [2021-11-16 20:56:48,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-16 20:56:48,456 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 110 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-16 20:56:48,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 536 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-16 20:56:48,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-16 20:56:48,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 168. [2021-11-16 20:56:48,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 103 states have (on average 1.203883495145631) internal successors, (124), 107 states have internal predecessors, (124), 49 states have call successors, (49), 12 states have call predecessors, (49), 15 states have return successors, (59), 48 states have call predecessors, (59), 48 states have call successors, (59) [2021-11-16 20:56:48,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 232 transitions. [2021-11-16 20:56:48,469 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 232 transitions. Word has length 153 [2021-11-16 20:56:48,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:56:48,470 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 232 transitions. [2021-11-16 20:56:48,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (23), 4 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-16 20:56:48,470 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 232 transitions. [2021-11-16 20:56:48,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-16 20:56:48,472 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:56:48,472 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:56:48,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-16 20:56:48,472 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:56:48,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:56:48,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1381363157, now seen corresponding path program 1 times [2021-11-16 20:56:48,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:56:48,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038094985] [2021-11-16 20:56:48,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:56:48,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:56:48,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:48,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:56:48,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:48,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:56:48,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:48,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:56:48,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:48,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:56:48,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:48,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-16 20:56:48,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:48,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-16 20:56:48,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:48,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:56:48,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:48,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 20:56:48,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:48,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-16 20:56:48,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:48,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-16 20:56:48,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:48,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-16 20:56:48,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:48,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-16 20:56:48,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:48,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-16 20:56:48,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:48,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-16 20:56:48,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:48,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-11-16 20:56:48,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:48,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-16 20:56:48,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:48,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-16 20:56:48,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:48,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-11-16 20:56:48,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:48,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-11-16 20:56:48,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:48,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-16 20:56:48,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:48,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2021-11-16 20:56:48,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:48,937 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2021-11-16 20:56:48,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:56:48,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038094985] [2021-11-16 20:56:48,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038094985] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:56:48,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561288422] [2021-11-16 20:56:48,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:56:48,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:56:48,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:56:48,939 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:56:48,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-16 20:56:49,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:49,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 2789 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-16 20:56:49,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:56:49,675 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-16 20:56:49,675 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:56:49,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561288422] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:56:49,675 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:56:49,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7] total 14 [2021-11-16 20:56:49,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027776544] [2021-11-16 20:56:49,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:56:49,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-16 20:56:49,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:56:49,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-16 20:56:49,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-11-16 20:56:49,677 INFO L87 Difference]: Start difference. First operand 168 states and 232 transitions. Second operand has 9 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-16 20:56:49,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:56:49,819 INFO L93 Difference]: Finished difference Result 314 states and 446 transitions. [2021-11-16 20:56:49,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-16 20:56:49,820 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 154 [2021-11-16 20:56:49,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:56:49,822 INFO L225 Difference]: With dead ends: 314 [2021-11-16 20:56:49,822 INFO L226 Difference]: Without dead ends: 173 [2021-11-16 20:56:49,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-11-16 20:56:49,823 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 12 mSDsluCounter, 1343 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1542 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 20:56:49,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1542 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 20:56:49,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-11-16 20:56:49,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-11-16 20:56:49,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 107 states have (on average 1.1962616822429906) internal successors, (128), 112 states have internal predecessors, (128), 49 states have call successors, (49), 12 states have call predecessors, (49), 16 states have return successors, (68), 48 states have call predecessors, (68), 48 states have call successors, (68) [2021-11-16 20:56:49,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 245 transitions. [2021-11-16 20:56:49,835 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 245 transitions. Word has length 154 [2021-11-16 20:56:49,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:56:49,836 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 245 transitions. [2021-11-16 20:56:49,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-16 20:56:49,836 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 245 transitions. [2021-11-16 20:56:49,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-16 20:56:49,838 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:56:49,838 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:56:49,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-16 20:56:50,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:56:50,051 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:56:50,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:56:50,052 INFO L85 PathProgramCache]: Analyzing trace with hash 137999856, now seen corresponding path program 1 times [2021-11-16 20:56:50,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:56:50,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251963202] [2021-11-16 20:56:50,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:56:50,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:56:50,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:50,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:56:50,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:50,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:56:50,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:50,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:56:50,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:50,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:56:50,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:50,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-16 20:56:50,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:50,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-16 20:56:50,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:50,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-16 20:56:50,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:50,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-16 20:56:50,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:50,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-16 20:56:50,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:50,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-16 20:56:50,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:50,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-16 20:56:50,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:50,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-16 20:56:50,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:50,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-16 20:56:50,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:50,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-16 20:56:50,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:50,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-11-16 20:56:50,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:50,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-16 20:56:50,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:50,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-11-16 20:56:50,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:50,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-11-16 20:56:50,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:50,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-11-16 20:56:50,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:50,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-11-16 20:56:50,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:50,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-16 20:56:50,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:50,474 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2021-11-16 20:56:50,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:56:50,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251963202] [2021-11-16 20:56:50,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251963202] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:56:50,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729368344] [2021-11-16 20:56:50,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:56:50,475 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:56:50,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:56:50,480 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:56:50,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-16 20:56:50,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:50,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 2794 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-16 20:56:50,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:56:51,246 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2021-11-16 20:56:51,246 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:56:51,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729368344] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:56:51,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:56:51,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2021-11-16 20:56:51,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231097770] [2021-11-16 20:56:51,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:56:51,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-16 20:56:51,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:56:51,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-16 20:56:51,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-16 20:56:51,248 INFO L87 Difference]: Start difference. First operand 173 states and 245 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-16 20:56:52,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:56:52,157 INFO L93 Difference]: Finished difference Result 319 states and 469 transitions. [2021-11-16 20:56:52,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-16 20:56:52,158 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 156 [2021-11-16 20:56:52,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:56:52,159 INFO L225 Difference]: With dead ends: 319 [2021-11-16 20:56:52,159 INFO L226 Difference]: Without dead ends: 173 [2021-11-16 20:56:52,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-16 20:56:52,161 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 17 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-16 20:56:52,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 711 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 47 Unchecked, 0.9s Time] [2021-11-16 20:56:52,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-11-16 20:56:52,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-11-16 20:56:52,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 107 states have (on average 1.1869158878504673) internal successors, (127), 112 states have internal predecessors, (127), 49 states have call successors, (49), 12 states have call predecessors, (49), 16 states have return successors, (68), 48 states have call predecessors, (68), 48 states have call successors, (68) [2021-11-16 20:56:52,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 244 transitions. [2021-11-16 20:56:52,173 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 244 transitions. Word has length 156 [2021-11-16 20:56:52,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:56:52,173 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 244 transitions. [2021-11-16 20:56:52,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-16 20:56:52,174 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 244 transitions. [2021-11-16 20:56:52,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-16 20:56:52,175 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:56:52,176 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:56:52,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-16 20:56:52,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:56:52,391 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:56:52,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:56:52,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1704475858, now seen corresponding path program 1 times [2021-11-16 20:56:52,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:56:52,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694745347] [2021-11-16 20:56:52,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:56:52,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:56:52,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:52,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:56:52,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:52,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:56:52,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:52,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:56:52,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:52,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:56:52,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:52,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-16 20:56:52,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:52,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-16 20:56:52,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:52,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-16 20:56:52,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:52,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-16 20:56:52,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:52,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-16 20:56:52,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:52,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-16 20:56:52,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:52,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-16 20:56:52,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:52,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-16 20:56:52,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:52,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-16 20:56:52,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:52,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-16 20:56:52,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:52,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-11-16 20:56:52,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:52,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-16 20:56:52,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:52,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-11-16 20:56:52,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:52,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-11-16 20:56:52,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:52,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-11-16 20:56:52,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:52,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-11-16 20:56:52,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:52,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-16 20:56:52,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:52,915 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2021-11-16 20:56:52,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:56:52,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694745347] [2021-11-16 20:56:52,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694745347] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:56:52,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092592681] [2021-11-16 20:56:52,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:56:52,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:56:52,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:56:52,918 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:56:52,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-16 20:56:53,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:53,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 2799 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-16 20:56:53,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:56:53,684 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 132 proven. 1 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2021-11-16 20:56:53,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:56:53,988 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2021-11-16 20:56:53,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092592681] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-16 20:56:53,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-16 20:56:53,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 5] total 10 [2021-11-16 20:56:53,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95713954] [2021-11-16 20:56:53,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:56:53,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-16 20:56:53,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:56:53,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-16 20:56:53,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-16 20:56:53,990 INFO L87 Difference]: Start difference. First operand 173 states and 244 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, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-16 20:56:54,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:56:54,079 INFO L93 Difference]: Finished difference Result 313 states and 450 transitions. [2021-11-16 20:56:54,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-16 20:56:54,079 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, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 156 [2021-11-16 20:56:54,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:56:54,081 INFO L225 Difference]: With dead ends: 313 [2021-11-16 20:56:54,081 INFO L226 Difference]: Without dead ends: 179 [2021-11-16 20:56:54,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 347 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-16 20:56:54,082 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 5 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 20:56:54,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 400 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 20:56:54,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-11-16 20:56:54,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 176. [2021-11-16 20:56:54,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 110 states have (on average 1.1818181818181819) internal successors, (130), 114 states have internal predecessors, (130), 49 states have call successors, (49), 13 states have call predecessors, (49), 16 states have return successors, (68), 48 states have call predecessors, (68), 48 states have call successors, (68) [2021-11-16 20:56:54,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 247 transitions. [2021-11-16 20:56:54,094 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 247 transitions. Word has length 156 [2021-11-16 20:56:54,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:56:54,094 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 247 transitions. [2021-11-16 20:56:54,095 INFO L471 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, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-16 20:56:54,095 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 247 transitions. [2021-11-16 20:56:54,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-16 20:56:54,096 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:56:54,096 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:56:54,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-16 20:56:54,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:56:54,312 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:56:54,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:56:54,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1045505707, now seen corresponding path program 1 times [2021-11-16 20:56:54,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:56:54,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190562817] [2021-11-16 20:56:54,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:56:54,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:56:54,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:54,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:56:54,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:54,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:56:54,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:54,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:56:54,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:54,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:56:54,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:54,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-16 20:56:54,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:54,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-16 20:56:54,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:54,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-16 20:56:54,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:54,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-16 20:56:54,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:54,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-16 20:56:54,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:54,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-16 20:56:54,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:54,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-16 20:56:54,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:54,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-11-16 20:56:54,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:54,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-16 20:56:54,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:54,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-11-16 20:56:54,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:54,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-16 20:56:54,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:54,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-16 20:56:54,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:54,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-11-16 20:56:54,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:54,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-11-16 20:56:54,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:54,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-11-16 20:56:54,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:54,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-11-16 20:56:54,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:54,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-11-16 20:56:54,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:54,707 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2021-11-16 20:56:54,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:56:54,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190562817] [2021-11-16 20:56:54,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190562817] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:56:54,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323995395] [2021-11-16 20:56:54,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:56:54,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:56:54,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:56:54,710 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:56:54,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-16 20:56:55,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:55,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 2810 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-16 20:56:55,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:57:04,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 41 [2021-11-16 20:57:04,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-11-16 20:57:04,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-11-16 20:57:05,060 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-16 20:57:05,060 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:57:05,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323995395] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:57:05,061 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:57:05,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [7] total 19 [2021-11-16 20:57:05,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145580287] [2021-11-16 20:57:05,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:57:05,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-16 20:57:05,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:57:05,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-16 20:57:05,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-11-16 20:57:05,063 INFO L87 Difference]: Start difference. First operand 176 states and 247 transitions. Second operand has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 13 states have internal predecessors, (73), 4 states have call successors, (23), 3 states have call predecessors, (23), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-16 20:57:12,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:57:12,497 INFO L93 Difference]: Finished difference Result 385 states and 564 transitions. [2021-11-16 20:57:12,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-16 20:57:12,498 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 13 states have internal predecessors, (73), 4 states have call successors, (23), 3 states have call predecessors, (23), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 157 [2021-11-16 20:57:12,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:57:12,499 INFO L225 Difference]: With dead ends: 385 [2021-11-16 20:57:12,499 INFO L226 Difference]: Without dead ends: 247 [2021-11-16 20:57:12,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 178 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=137, Invalid=617, Unknown=2, NotChecked=0, Total=756 [2021-11-16 20:57:12,501 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 341 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 898 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 743 SdHoareTripleChecker+Invalid, 1217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 217 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:57:12,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [374 Valid, 743 Invalid, 1217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 898 Invalid, 0 Unknown, 217 Unchecked, 3.0s Time] [2021-11-16 20:57:12,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-11-16 20:57:12,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 197. [2021-11-16 20:57:12,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 125 states have (on average 1.168) internal successors, (146), 129 states have internal predecessors, (146), 53 states have call successors, (53), 14 states have call predecessors, (53), 18 states have return successors, (82), 53 states have call predecessors, (82), 52 states have call successors, (82) [2021-11-16 20:57:12,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 281 transitions. [2021-11-16 20:57:12,520 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 281 transitions. Word has length 157 [2021-11-16 20:57:12,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:57:12,521 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 281 transitions. [2021-11-16 20:57:12,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 13 states have internal predecessors, (73), 4 states have call successors, (23), 3 states have call predecessors, (23), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-16 20:57:12,521 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 281 transitions. [2021-11-16 20:57:12,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-16 20:57:12,523 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:57:12,523 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:57:12,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-16 20:57:12,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-16 20:57:12,740 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:57:12,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:57:12,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1004903191, now seen corresponding path program 1 times [2021-11-16 20:57:12,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:57:12,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735749376] [2021-11-16 20:57:12,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:57:12,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:57:12,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:12,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:57:12,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:12,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:57:12,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:12,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:57:12,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:12,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:57:12,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:12,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-16 20:57:12,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:12,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-16 20:57:12,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:12,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-16 20:57:12,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:12,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-16 20:57:12,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:12,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-16 20:57:12,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:12,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-16 20:57:12,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:12,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-16 20:57:12,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:12,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-11-16 20:57:12,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:12,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-16 20:57:12,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:12,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-11-16 20:57:12,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:12,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-16 20:57:12,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:12,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-16 20:57:12,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:12,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-11-16 20:57:12,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:12,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-11-16 20:57:12,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:12,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-11-16 20:57:12,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:12,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-11-16 20:57:12,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:12,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-11-16 20:57:12,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:12,998 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2021-11-16 20:57:12,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:57:12,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735749376] [2021-11-16 20:57:12,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735749376] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:57:12,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632732320] [2021-11-16 20:57:12,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:57:12,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:57:12,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:57:13,000 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:57:13,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-16 20:57:13,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:13,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 2805 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-16 20:57:13,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:57:13,783 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2021-11-16 20:57:13,783 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:57:13,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632732320] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:57:13,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:57:13,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2021-11-16 20:57:13,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201293273] [2021-11-16 20:57:13,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:57:13,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-16 20:57:13,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:57:13,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-16 20:57:13,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-16 20:57:13,785 INFO L87 Difference]: Start difference. First operand 197 states and 281 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-16 20:57:13,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:57:13,813 INFO L93 Difference]: Finished difference Result 343 states and 499 transitions. [2021-11-16 20:57:13,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 20:57:13,814 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 157 [2021-11-16 20:57:13,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:57:13,816 INFO L225 Difference]: With dead ends: 343 [2021-11-16 20:57:13,816 INFO L226 Difference]: Without dead ends: 185 [2021-11-16 20:57:13,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-16 20:57:13,817 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 6 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:57:13,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 604 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 20:57:13,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-11-16 20:57:13,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 182. [2021-11-16 20:57:13,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 115 states have (on average 1.1652173913043478) internal successors, (134), 119 states have internal predecessors, (134), 49 states have call successors, (49), 14 states have call predecessors, (49), 17 states have return successors, (68), 48 states have call predecessors, (68), 48 states have call successors, (68) [2021-11-16 20:57:13,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 251 transitions. [2021-11-16 20:57:13,830 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 251 transitions. Word has length 157 [2021-11-16 20:57:13,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:57:13,831 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 251 transitions. [2021-11-16 20:57:13,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-16 20:57:13,831 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 251 transitions. [2021-11-16 20:57:13,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-16 20:57:13,834 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:57:13,834 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:57:13,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-16 20:57:14,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:57:14,059 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:57:14,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:57:14,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1435718499, now seen corresponding path program 1 times [2021-11-16 20:57:14,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:57:14,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012225424] [2021-11-16 20:57:14,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:57:14,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:57:14,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:14,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:57:14,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:14,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:57:14,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:14,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:57:14,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:14,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:57:14,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:14,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-16 20:57:14,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:14,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-16 20:57:14,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:14,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-16 20:57:14,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:14,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-16 20:57:14,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:14,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-16 20:57:14,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:14,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-16 20:57:14,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:14,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-16 20:57:14,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:14,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-16 20:57:14,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:14,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-16 20:57:14,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:14,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-16 20:57:14,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:14,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-11-16 20:57:14,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:14,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-16 20:57:14,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:14,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-11-16 20:57:14,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:14,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-16 20:57:14,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:14,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-11-16 20:57:14,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:14,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-11-16 20:57:14,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:14,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-16 20:57:14,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:14,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-16 20:57:14,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:14,425 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2021-11-16 20:57:14,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:57:14,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012225424] [2021-11-16 20:57:14,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012225424] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:57:14,426 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:57:14,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-16 20:57:14,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647817023] [2021-11-16 20:57:14,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:57:14,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-16 20:57:14,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:57:14,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-16 20:57:14,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-16 20:57:14,428 INFO L87 Difference]: Start difference. First operand 182 states and 251 transitions. Second operand has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 7 states have internal predecessors, (60), 5 states have call successors, (24), 4 states have call predecessors, (24), 1 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2021-11-16 20:57:16,988 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:57:18,097 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:57:19,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:57:19,011 INFO L93 Difference]: Finished difference Result 339 states and 475 transitions. [2021-11-16 20:57:19,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-16 20:57:19,012 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 7 states have internal predecessors, (60), 5 states have call successors, (24), 4 states have call predecessors, (24), 1 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) Word has length 164 [2021-11-16 20:57:19,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:57:19,013 INFO L225 Difference]: With dead ends: 339 [2021-11-16 20:57:19,013 INFO L226 Difference]: Without dead ends: 185 [2021-11-16 20:57:19,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-11-16 20:57:19,015 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 186 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 191 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-16 20:57:19,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 591 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 597 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2021-11-16 20:57:19,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-11-16 20:57:19,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 182. [2021-11-16 20:57:19,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 115 states have (on average 1.1565217391304348) internal successors, (133), 119 states have internal predecessors, (133), 49 states have call successors, (49), 14 states have call predecessors, (49), 17 states have return successors, (68), 48 states have call predecessors, (68), 48 states have call successors, (68) [2021-11-16 20:57:19,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 250 transitions. [2021-11-16 20:57:19,026 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 250 transitions. Word has length 164 [2021-11-16 20:57:19,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:57:19,026 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 250 transitions. [2021-11-16 20:57:19,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 7 states have internal predecessors, (60), 5 states have call successors, (24), 4 states have call predecessors, (24), 1 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2021-11-16 20:57:19,027 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 250 transitions. [2021-11-16 20:57:19,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-11-16 20:57:19,028 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:57:19,029 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 5, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:57:19,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-16 20:57:19,029 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:57:19,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:57:19,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1024501214, now seen corresponding path program 1 times [2021-11-16 20:57:19,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:57:19,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780409623] [2021-11-16 20:57:19,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:57:19,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:57:19,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:19,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:57:19,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:19,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:57:19,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:19,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:57:19,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:19,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:57:19,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:19,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-16 20:57:19,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:19,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-16 20:57:19,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:19,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:57:19,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:19,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-16 20:57:19,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:19,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-16 20:57:19,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:19,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-16 20:57:19,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:19,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-16 20:57:19,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:19,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-16 20:57:19,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:19,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-16 20:57:19,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:19,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-16 20:57:19,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:19,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-11-16 20:57:19,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:19,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-16 20:57:19,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:19,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-16 20:57:19,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:19,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-11-16 20:57:19,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:19,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-11-16 20:57:19,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:19,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-11-16 20:57:19,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:19,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-11-16 20:57:19,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:19,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-11-16 20:57:19,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:19,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-11-16 20:57:19,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:19,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-11-16 20:57:19,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:19,420 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2021-11-16 20:57:19,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:57:19,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780409623] [2021-11-16 20:57:19,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780409623] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:57:19,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625134438] [2021-11-16 20:57:19,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:57:19,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:57:19,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:57:19,423 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:57:19,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-16 20:57:19,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:19,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 2864 conjuncts, 87 conjunts are in the unsatisfiable core [2021-11-16 20:57:19,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:57:20,463 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-16 20:57:20,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 25 [2021-11-16 20:57:20,651 INFO L354 Elim1Store]: treesize reduction 144, result has 23.8 percent of original size [2021-11-16 20:57:20,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 94 treesize of output 138 [2021-11-16 20:57:20,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:57:20,813 INFO L354 Elim1Store]: treesize reduction 75, result has 13.8 percent of original size [2021-11-16 20:57:20,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 70 treesize of output 56 [2021-11-16 20:57:20,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:57:20,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:57:20,921 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-16 20:57:20,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 37 [2021-11-16 20:57:21,393 INFO L354 Elim1Store]: treesize reduction 85, result has 12.4 percent of original size [2021-11-16 20:57:21,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 111 treesize of output 85 [2021-11-16 20:57:21,441 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-16 20:57:21,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 51 [2021-11-16 20:57:21,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-11-16 20:57:21,543 INFO L354 Elim1Store]: treesize reduction 51, result has 19.0 percent of original size [2021-11-16 20:57:21,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 90 treesize of output 72 [2021-11-16 20:57:22,824 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_#Ultimate.C_memcpy_#t~loopctr1236_14| Int) (|#Ultimate.C_memcpy_#t~mem1244| Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |c_#Ultimate.C_memcpy_dest.base| (store (select |c_old(#memory_int)| |c_#Ultimate.C_memcpy_dest.base|) (+ |v_#Ultimate.C_memcpy_#t~loopctr1236_14| |c_#Ultimate.C_memcpy_dest.offset|) |#Ultimate.C_memcpy_#t~mem1244|)))) is different from true [2021-11-16 20:57:23,830 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_#Ultimate.C_memcpy_#t~loopctr1236_14| Int) (|#Ultimate.C_memcpy_#t~mem1244| Int) (|v_#Ultimate.C_memcpy_#t~loopctr1245_12| Int) (|#Ultimate.C_memcpy_dest.offset| Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |c_#Ultimate.C_memcpy_dest.base| (let ((.cse0 (+ |v_#Ultimate.C_memcpy_#t~loopctr1245_12| |#Ultimate.C_memcpy_dest.offset|))) (store (store (select |c_old(#memory_int)| |c_#Ultimate.C_memcpy_dest.base|) (+ |v_#Ultimate.C_memcpy_#t~loopctr1236_14| |#Ultimate.C_memcpy_dest.offset|) |#Ultimate.C_memcpy_#t~mem1244|) .cse0 (select (select |c_#memory_int| |c_#Ultimate.C_memcpy_dest.base|) .cse0)))))) is different from true [2021-11-16 20:57:23,855 INFO L354 Elim1Store]: treesize reduction 29, result has 31.0 percent of original size [2021-11-16 20:57:23,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 13 [2021-11-16 20:57:23,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-16 20:57:24,536 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 139 proven. 118 refuted. 0 times theorem prover too weak. 89 trivial. 2 not checked. [2021-11-16 20:57:24,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:57:25,126 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-11-16 20:57:25,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625134438] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 20:57:25,126 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 20:57:25,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 22, 8] total 32 [2021-11-16 20:57:25,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422753925] [2021-11-16 20:57:25,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 20:57:25,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-16 20:57:25,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:57:25,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-16 20:57:25,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=794, Unknown=2, NotChecked=114, Total=992 [2021-11-16 20:57:25,129 INFO L87 Difference]: Start difference. First operand 182 states and 250 transitions. Second operand has 32 states, 31 states have (on average 4.806451612903226) internal successors, (149), 29 states have internal predecessors, (149), 12 states have call successors, (60), 8 states have call predecessors, (60), 9 states have return successors, (53), 11 states have call predecessors, (53), 12 states have call successors, (53) [2021-11-16 20:57:43,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:57:43,390 INFO L93 Difference]: Finished difference Result 391 states and 563 transitions. [2021-11-16 20:57:43,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-16 20:57:43,391 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 4.806451612903226) internal successors, (149), 29 states have internal predecessors, (149), 12 states have call successors, (60), 8 states have call predecessors, (60), 9 states have return successors, (53), 11 states have call predecessors, (53), 12 states have call successors, (53) Word has length 175 [2021-11-16 20:57:43,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:57:43,393 INFO L225 Difference]: With dead ends: 391 [2021-11-16 20:57:43,393 INFO L226 Difference]: Without dead ends: 252 [2021-11-16 20:57:43,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 363 SyntacticMatches, 15 SemanticMatches, 58 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=337, Invalid=2968, Unknown=9, NotChecked=226, Total=3540 [2021-11-16 20:57:43,395 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 324 mSDsluCounter, 1933 mSDsCounter, 0 mSdLazyCounter, 2501 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 2127 SdHoareTripleChecker+Invalid, 3923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 2501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1092 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-16 20:57:43,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 2127 Invalid, 3923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 2501 Invalid, 0 Unknown, 1092 Unchecked, 4.2s Time] [2021-11-16 20:57:43,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-11-16 20:57:43,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 204. [2021-11-16 20:57:43,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 131 states have (on average 1.1603053435114503) internal successors, (152), 134 states have internal predecessors, (152), 53 states have call successors, (53), 16 states have call predecessors, (53), 19 states have return successors, (72), 53 states have call predecessors, (72), 52 states have call successors, (72) [2021-11-16 20:57:43,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 277 transitions. [2021-11-16 20:57:43,410 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 277 transitions. Word has length 175 [2021-11-16 20:57:43,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:57:43,410 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 277 transitions. [2021-11-16 20:57:43,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 4.806451612903226) internal successors, (149), 29 states have internal predecessors, (149), 12 states have call successors, (60), 8 states have call predecessors, (60), 9 states have return successors, (53), 11 states have call predecessors, (53), 12 states have call successors, (53) [2021-11-16 20:57:43,411 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 277 transitions. [2021-11-16 20:57:43,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-16 20:57:43,412 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:57:43,412 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 5, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:57:43,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-16 20:57:43,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-16 20:57:43,636 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:57:43,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:57:43,636 INFO L85 PathProgramCache]: Analyzing trace with hash 537517559, now seen corresponding path program 1 times [2021-11-16 20:57:43,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:57:43,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24616004] [2021-11-16 20:57:43,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:57:43,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:57:44,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:44,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:57:44,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:44,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:57:44,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:44,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:57:44,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:44,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:57:44,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:44,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-16 20:57:44,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:44,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-16 20:57:44,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:44,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:57:44,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:44,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-16 20:57:44,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:44,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-16 20:57:44,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:44,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-16 20:57:44,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:44,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-16 20:57:44,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:44,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-16 20:57:44,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:44,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-16 20:57:44,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:44,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-16 20:57:44,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:45,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-16 20:57:45,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:45,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-11-16 20:57:45,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:45,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-11-16 20:57:45,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:45,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-11-16 20:57:45,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:45,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-11-16 20:57:45,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:45,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-11-16 20:57:45,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:45,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2021-11-16 20:57:45,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:45,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-16 20:57:45,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:45,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-11-16 20:57:45,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:45,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2021-11-16 20:57:45,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:45,190 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-11-16 20:57:45,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:57:45,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24616004] [2021-11-16 20:57:45,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24616004] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:57:45,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303988049] [2021-11-16 20:57:45,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:57:45,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:57:45,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:57:45,193 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:57:45,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-16 20:57:45,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:45,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 2905 conjuncts, 113 conjunts are in the unsatisfiable core [2021-11-16 20:57:45,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:58:02,454 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-16 20:58:02,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2021-11-16 20:58:02,538 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-16 20:58:02,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 29 [2021-11-16 20:58:02,976 INFO L354 Elim1Store]: treesize reduction 212, result has 36.3 percent of original size [2021-11-16 20:58:02,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 14 case distinctions, treesize of input 107 treesize of output 199 [2021-11-16 20:58:04,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:58:04,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:58:04,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:58:04,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-16 20:58:04,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:58:04,341 INFO L354 Elim1Store]: treesize reduction 25, result has 35.9 percent of original size [2021-11-16 20:58:04,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 94 treesize of output 71 [2021-11-16 20:58:04,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:58:04,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:58:04,501 INFO L354 Elim1Store]: treesize reduction 80, result has 26.6 percent of original size [2021-11-16 20:58:04,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 109 treesize of output 97 [2021-11-16 20:58:04,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:58:04,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:58:04,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:58:04,714 INFO L354 Elim1Store]: treesize reduction 27, result has 34.1 percent of original size [2021-11-16 20:58:04,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 96 treesize of output 74 [2021-11-16 20:58:05,136 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-16 20:58:05,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:58:05,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:58:05,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:58:05,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:58:05,186 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-11-16 20:58:05,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 64 treesize of output 34 [2021-11-16 20:58:05,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:58:05,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:58:05,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:58:05,381 INFO L354 Elim1Store]: treesize reduction 42, result has 2.3 percent of original size [2021-11-16 20:58:05,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 89 treesize of output 47 [2021-11-16 20:58:05,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:58:05,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:58:05,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:58:05,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-16 20:58:05,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:58:05,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 35 [2021-11-16 20:58:05,919 WARN L220 Elim1Store]: Array PQE input equivalent to false [2021-11-16 20:58:05,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:58:05,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:58:05,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 34 [2021-11-16 20:58:06,739 INFO L354 Elim1Store]: treesize reduction 59, result has 19.2 percent of original size [2021-11-16 20:58:06,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 95 treesize of output 75 [2021-11-16 20:58:06,899 INFO L354 Elim1Store]: treesize reduction 100, result has 22.5 percent of original size [2021-11-16 20:58:06,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 117 treesize of output 107 [2021-11-16 20:58:07,861 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-16 20:58:07,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 79 [2021-11-16 20:58:08,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:58:08,902 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-16 20:58:08,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 40 [2021-11-16 20:58:08,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:58:08,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:58:08,956 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-11-16 20:58:08,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 64 treesize of output 40 [2021-11-16 20:58:08,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:58:08,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:58:08,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 20 [2021-11-16 20:58:16,143 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-16 20:58:16,144 INFO L388 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 450 treesize of output 452 [2021-11-16 20:58:42,163 WARN L227 SmtUtils]: Spent 17.53s on a formula simplification. DAG size of input: 772 DAG size of output: 694 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-16 20:58:42,165 INFO L354 Elim1Store]: treesize reduction 454, result has 80.1 percent of original size [2021-11-16 20:58:42,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 20 select indices, 20 select index equivalence classes, 1 disjoint index pairs (out of 190 index pairs), introduced 20 new quantified variables, introduced 190 case distinctions, treesize of input 426 treesize of output 2070 Killed by 15