./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_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_linked_list_push_back_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 d155cc00d5c2ba6f5ef1d5e883c6d133605de01ed97e4300960f893025d81fd1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-16 21:27:00,934 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-16 21:27:00,936 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-16 21:27:00,968 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-16 21:27:00,968 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-16 21:27:00,970 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-16 21:27:00,972 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-16 21:27:00,973 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-16 21:27:00,975 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-16 21:27:00,978 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-16 21:27:00,978 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-16 21:27:00,979 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-16 21:27:00,980 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-16 21:27:00,982 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-16 21:27:00,983 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-16 21:27:00,985 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-16 21:27:00,986 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-16 21:27:00,986 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-16 21:27:00,988 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-16 21:27:00,992 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-16 21:27:00,993 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-16 21:27:00,994 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-16 21:27:00,995 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-16 21:27:00,995 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-16 21:27:01,000 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-16 21:27:01,000 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-16 21:27:01,000 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-16 21:27:01,002 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-16 21:27:01,002 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-16 21:27:01,002 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-16 21:27:01,003 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-16 21:27:01,003 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-16 21:27:01,004 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-16 21:27:01,005 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-16 21:27:01,006 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-16 21:27:01,006 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-16 21:27:01,006 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-16 21:27:01,007 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-16 21:27:01,007 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-16 21:27:01,007 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-16 21:27:01,008 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-16 21:27:01,008 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-16 21:27:01,032 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-16 21:27:01,032 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-16 21:27:01,032 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-16 21:27:01,033 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-16 21:27:01,033 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-16 21:27:01,033 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-16 21:27:01,034 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-16 21:27:01,034 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-16 21:27:01,034 INFO L138 SettingsManager]: * Use SBE=true [2021-11-16 21:27:01,034 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-16 21:27:01,035 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-16 21:27:01,035 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-16 21:27:01,035 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-16 21:27:01,035 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-16 21:27:01,035 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-16 21:27:01,036 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-16 21:27:01,036 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-16 21:27:01,036 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-16 21:27:01,036 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-16 21:27:01,036 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-16 21:27:01,036 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-16 21:27:01,036 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-16 21:27:01,036 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-16 21:27:01,037 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-16 21:27:01,037 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-16 21:27:01,037 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-16 21:27:01,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-16 21:27:01,038 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-16 21:27:01,038 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-16 21:27:01,038 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-16 21:27:01,038 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-16 21:27:01,038 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d155cc00d5c2ba6f5ef1d5e883c6d133605de01ed97e4300960f893025d81fd1 [2021-11-16 21:27:01,223 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-16 21:27:01,241 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-16 21:27:01,243 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-16 21:27:01,244 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-16 21:27:01,244 INFO L275 PluginConnector]: CDTParser initialized [2021-11-16 21:27:01,245 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i [2021-11-16 21:27:01,286 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f29204e69/6d8febc196c245dc8938a8b6a7e7d3c1/FLAGb1f32b7fa [2021-11-16 21:27:01,718 INFO L306 CDTParser]: Found 1 translation units. [2021-11-16 21:27:01,718 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i [2021-11-16 21:27:01,738 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f29204e69/6d8febc196c245dc8938a8b6a7e7d3c1/FLAGb1f32b7fa [2021-11-16 21:27:02,006 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f29204e69/6d8febc196c245dc8938a8b6a7e7d3c1 [2021-11-16 21:27:02,012 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-16 21:27:02,014 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-16 21:27:02,021 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-16 21:27:02,021 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-16 21:27:02,024 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-16 21:27:02,024 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 09:27:02" (1/1) ... [2021-11-16 21:27:02,025 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34e35a8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:27:02, skipping insertion in model container [2021-11-16 21:27:02,025 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 09:27:02" (1/1) ... [2021-11-16 21:27:02,040 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-16 21:27:02,107 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-16 21:27:02,280 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_linked_list_push_back_harness.i[4499,4512] [2021-11-16 21:27:02,285 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_linked_list_push_back_harness.i[4559,4572] [2021-11-16 21:27:02,297 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-16 21:27:02,305 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-16 21:27:02,714 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:27:02,714 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:27:02,715 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:27:02,715 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:27:02,716 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:27:02,723 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:27:02,724 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:27:02,725 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:27:02,725 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:27:02,726 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:27:02,727 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:27:02,727 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:27:02,728 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:27:02,901 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-16 21:27:02,901 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-16 21:27:02,902 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-16 21:27:02,903 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-16 21:27:02,904 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-16 21:27:02,905 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-16 21:27:02,905 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-16 21:27:02,906 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-16 21:27:02,914 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-16 21:27:02,916 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-16 21:27:03,017 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-16 21:27:03,066 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-16 21:27:03,079 INFO L203 MainTranslator]: Completed pre-run [2021-11-16 21:27:03,095 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_linked_list_push_back_harness.i[4499,4512] [2021-11-16 21:27:03,096 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_linked_list_push_back_harness.i[4559,4572] [2021-11-16 21:27:03,097 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-16 21:27:03,098 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-16 21:27:03,143 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:27:03,144 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:27:03,144 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:27:03,146 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:27:03,146 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:27:03,158 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:27:03,158 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:27:03,159 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:27:03,159 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:27:03,159 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:27:03,160 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:27:03,160 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:27:03,160 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:27:03,194 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-16 21:27:03,195 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-16 21:27:03,196 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-16 21:27:03,196 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-16 21:27:03,197 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-16 21:27:03,197 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-16 21:27:03,197 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-16 21:27:03,198 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-16 21:27:03,198 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-16 21:27:03,198 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-16 21:27:03,216 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-16 21:27:03,230 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-16 21:27:03,348 INFO L208 MainTranslator]: Completed translation [2021-11-16 21:27:03,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:27:03 WrapperNode [2021-11-16 21:27:03,349 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-16 21:27:03,350 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-16 21:27:03,350 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-16 21:27:03,350 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-16 21:27:03,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:27:03" (1/1) ... [2021-11-16 21:27:03,412 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:27:03" (1/1) ... [2021-11-16 21:27:03,446 INFO L137 Inliner]: procedures = 681, calls = 1050, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 149 [2021-11-16 21:27:03,447 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-16 21:27:03,447 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-16 21:27:03,447 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-16 21:27:03,448 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-16 21:27:03,453 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:27:03" (1/1) ... [2021-11-16 21:27:03,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:27:03" (1/1) ... [2021-11-16 21:27:03,463 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:27:03" (1/1) ... [2021-11-16 21:27:03,464 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:27:03" (1/1) ... [2021-11-16 21:27:03,483 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:27:03" (1/1) ... [2021-11-16 21:27:03,486 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:27:03" (1/1) ... [2021-11-16 21:27:03,489 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:27:03" (1/1) ... [2021-11-16 21:27:03,493 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-16 21:27:03,494 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-16 21:27:03,494 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-16 21:27:03,494 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-16 21:27:03,516 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:27:03" (1/1) ... [2021-11-16 21:27:03,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-16 21:27:03,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:27:03,544 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 21:27:03,546 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 21:27:03,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-16 21:27:03,570 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-16 21:27:03,570 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-16 21:27:03,571 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-11-16 21:27:03,571 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-11-16 21:27:03,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-16 21:27:03,572 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2021-11-16 21:27:03,572 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2021-11-16 21:27:03,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-16 21:27:03,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-16 21:27:03,572 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_insert_before [2021-11-16 21:27:03,572 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_insert_before [2021-11-16 21:27:03,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-16 21:27:03,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-16 21:27:03,573 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-16 21:27:03,573 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-16 21:27:03,573 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-16 21:27:03,573 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-16 21:27:03,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-16 21:27:03,574 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-16 21:27:03,574 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-16 21:27:03,574 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2021-11-16 21:27:03,574 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2021-11-16 21:27:03,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-16 21:27:03,717 INFO L236 CfgBuilder]: Building ICFG [2021-11-16 21:27:03,718 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-16 21:27:04,002 INFO L277 CfgBuilder]: Performing block encoding [2021-11-16 21:27:04,010 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-16 21:27:04,011 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-16 21:27:04,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 09:27:04 BoogieIcfgContainer [2021-11-16 21:27:04,012 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-16 21:27:04,014 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-16 21:27:04,014 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-16 21:27:04,016 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-16 21:27:04,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 09:27:02" (1/3) ... [2021-11-16 21:27:04,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46a3d7a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 09:27:04, skipping insertion in model container [2021-11-16 21:27:04,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:27:03" (2/3) ... [2021-11-16 21:27:04,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46a3d7a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 09:27:04, skipping insertion in model container [2021-11-16 21:27:04,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 09:27:04" (3/3) ... [2021-11-16 21:27:04,019 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_push_back_harness.i [2021-11-16 21:27:04,022 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-16 21:27:04,022 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-16 21:27:04,062 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-16 21:27:04,066 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 21:27:04,066 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-16 21:27:04,080 INFO L276 IsEmpty]: Start isEmpty. Operand has 102 states, 65 states have (on average 1.2923076923076924) internal successors, (84), 66 states have internal predecessors, (84), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-11-16 21:27:04,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-16 21:27:04,086 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:27:04,086 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-11-16 21:27:04,087 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:27:04,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:27:04,091 INFO L85 PathProgramCache]: Analyzing trace with hash 524704703, now seen corresponding path program 1 times [2021-11-16 21:27:04,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:27:04,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620223472] [2021-11-16 21:27:04,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:27:04,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:27:04,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:04,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:27:04,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:04,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:27:04,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:04,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:27:04,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:04,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-16 21:27:04,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:04,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-16 21:27:04,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:04,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-16 21:27:04,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:04,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 21:27:04,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:04,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-16 21:27:04,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:04,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-16 21:27:04,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:04,454 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-16 21:27:04,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:27:04,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620223472] [2021-11-16 21:27:04,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620223472] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:27:04,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:27:04,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-16 21:27:04,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215209272] [2021-11-16 21:27:04,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:27:04,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-16 21:27:04,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:27:04,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-16 21:27:04,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-16 21:27:04,479 INFO L87 Difference]: Start difference. First operand has 102 states, 65 states have (on average 1.2923076923076924) internal successors, (84), 66 states have internal predecessors, (84), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-16 21:27:04,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:27:04,561 INFO L93 Difference]: Finished difference Result 208 states and 310 transitions. [2021-11-16 21:27:04,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 21:27:04,563 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 73 [2021-11-16 21:27:04,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:27:04,574 INFO L225 Difference]: With dead ends: 208 [2021-11-16 21:27:04,574 INFO L226 Difference]: Without dead ends: 109 [2021-11-16 21:27:04,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 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 21:27:04,583 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 21 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 21:27:04,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 398 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 21:27:04,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-16 21:27:04,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 99. [2021-11-16 21:27:04,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 64 states have internal predecessors, (78), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-16 21:27:04,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 133 transitions. [2021-11-16 21:27:04,626 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 133 transitions. Word has length 73 [2021-11-16 21:27:04,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:27:04,627 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 133 transitions. [2021-11-16 21:27:04,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-16 21:27:04,628 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 133 transitions. [2021-11-16 21:27:04,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-16 21:27:04,634 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:27:04,634 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-11-16 21:27:04,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-16 21:27:04,635 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:27:04,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:27:04,635 INFO L85 PathProgramCache]: Analyzing trace with hash -125862913, now seen corresponding path program 1 times [2021-11-16 21:27:04,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:27:04,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583923128] [2021-11-16 21:27:04,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:27:04,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:27:04,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:04,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:27:04,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:04,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:27:04,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:04,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:27:04,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:04,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-16 21:27:04,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:04,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-16 21:27:04,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:04,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-16 21:27:04,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:04,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 21:27:04,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:04,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-16 21:27:04,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:04,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-16 21:27:04,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:04,847 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-16 21:27:04,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:27:04,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583923128] [2021-11-16 21:27:04,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583923128] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:27:04,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:27:04,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-16 21:27:04,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060365916] [2021-11-16 21:27:04,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:27:04,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-16 21:27:04,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:27:04,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-16 21:27:04,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-16 21:27:04,850 INFO L87 Difference]: Start difference. First operand 99 states and 133 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-16 21:27:04,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:27:04,886 INFO L93 Difference]: Finished difference Result 192 states and 265 transitions. [2021-11-16 21:27:04,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 21:27:04,887 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 73 [2021-11-16 21:27:04,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:27:04,888 INFO L225 Difference]: With dead ends: 192 [2021-11-16 21:27:04,888 INFO L226 Difference]: Without dead ends: 107 [2021-11-16 21:27:04,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 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 21:27:04,890 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 12 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 21:27:04,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 380 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 21:27:04,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-16 21:27:04,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 101. [2021-11-16 21:27:04,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 65 states have (on average 1.2307692307692308) internal successors, (80), 66 states have internal predecessors, (80), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-16 21:27:04,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 135 transitions. [2021-11-16 21:27:04,900 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 135 transitions. Word has length 73 [2021-11-16 21:27:04,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:27:04,902 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 135 transitions. [2021-11-16 21:27:04,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-16 21:27:04,902 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 135 transitions. [2021-11-16 21:27:04,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-16 21:27:04,906 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:27:04,906 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-11-16 21:27:04,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-16 21:27:04,907 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:27:04,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:27:04,907 INFO L85 PathProgramCache]: Analyzing trace with hash 2140518273, now seen corresponding path program 1 times [2021-11-16 21:27:04,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:27:04,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37636049] [2021-11-16 21:27:04,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:27:04,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:27:04,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:04,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:27:04,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:04,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:27:04,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:04,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:27:04,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:05,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-16 21:27:05,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:05,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-16 21:27:05,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:05,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-16 21:27:05,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:05,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 21:27:05,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:05,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-16 21:27:05,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:05,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-16 21:27:05,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:05,055 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-16 21:27:05,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:27:05,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37636049] [2021-11-16 21:27:05,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37636049] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:27:05,060 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:27:05,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-16 21:27:05,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984049972] [2021-11-16 21:27:05,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:27:05,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-16 21:27:05,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:27:05,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-16 21:27:05,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-16 21:27:05,063 INFO L87 Difference]: Start difference. First operand 101 states and 135 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-16 21:27:05,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:27:05,137 INFO L93 Difference]: Finished difference Result 192 states and 263 transitions. [2021-11-16 21:27:05,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-16 21:27:05,138 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 73 [2021-11-16 21:27:05,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:27:05,140 INFO L225 Difference]: With dead ends: 192 [2021-11-16 21:27:05,140 INFO L226 Difference]: Without dead ends: 105 [2021-11-16 21:27:05,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-16 21:27:05,142 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 22 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 21:27:05,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 571 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 21:27:05,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-16 21:27:05,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2021-11-16 21:27:05,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 69 states have internal predecessors, (83), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-16 21:27:05,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 138 transitions. [2021-11-16 21:27:05,150 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 138 transitions. Word has length 73 [2021-11-16 21:27:05,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:27:05,150 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 138 transitions. [2021-11-16 21:27:05,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-16 21:27:05,150 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 138 transitions. [2021-11-16 21:27:05,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-16 21:27:05,151 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:27:05,152 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-11-16 21:27:05,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-16 21:27:05,152 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:27:05,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:27:05,152 INFO L85 PathProgramCache]: Analyzing trace with hash 2124999555, now seen corresponding path program 1 times [2021-11-16 21:27:05,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:27:05,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580055753] [2021-11-16 21:27:05,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:27:05,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:27:05,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:05,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:27:05,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:05,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:27:05,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:05,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:27:05,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:05,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-16 21:27:05,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:05,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-16 21:27:05,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:05,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-16 21:27:05,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:05,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 21:27:05,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:05,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-16 21:27:05,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:05,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-16 21:27:05,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:05,285 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-16 21:27:05,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:27:05,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580055753] [2021-11-16 21:27:05,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580055753] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:27:05,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:27:05,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-16 21:27:05,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228593805] [2021-11-16 21:27:05,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:27:05,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-16 21:27:05,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:27:05,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-16 21:27:05,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-16 21:27:05,287 INFO L87 Difference]: Start difference. First operand 104 states and 138 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-16 21:27:05,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:27:05,337 INFO L93 Difference]: Finished difference Result 201 states and 268 transitions. [2021-11-16 21:27:05,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-16 21:27:05,338 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 73 [2021-11-16 21:27:05,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:27:05,339 INFO L225 Difference]: With dead ends: 201 [2021-11-16 21:27:05,339 INFO L226 Difference]: Without dead ends: 102 [2021-11-16 21:27:05,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-16 21:27:05,340 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 28 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 21:27:05,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 570 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 21:27:05,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-16 21:27:05,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-11-16 21:27:05,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 67 states have internal predecessors, (80), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-16 21:27:05,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 135 transitions. [2021-11-16 21:27:05,347 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 135 transitions. Word has length 73 [2021-11-16 21:27:05,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:27:05,347 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 135 transitions. [2021-11-16 21:27:05,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-16 21:27:05,348 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 135 transitions. [2021-11-16 21:27:05,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-16 21:27:05,348 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:27:05,349 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-11-16 21:27:05,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-16 21:27:05,349 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:27:05,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:27:05,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1956548997, now seen corresponding path program 1 times [2021-11-16 21:27:05,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:27:05,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303698981] [2021-11-16 21:27:05,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:27:05,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:27:05,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:05,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:27:05,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:05,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:27:05,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:05,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:27:05,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:05,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-16 21:27:05,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:05,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-16 21:27:05,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:05,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-16 21:27:05,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:05,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 21:27:05,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:05,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-16 21:27:05,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:05,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-16 21:27:05,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:05,489 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-16 21:27:05,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:27:05,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303698981] [2021-11-16 21:27:05,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303698981] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:27:05,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075645024] [2021-11-16 21:27:05,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:27:05,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:27:05,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:27:05,493 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 21:27:05,523 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 21:27:05,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:05,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-16 21:27:05,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:27:05,856 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-16 21:27:05,856 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:27:05,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075645024] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:27:05,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:27:05,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6] total 11 [2021-11-16 21:27:05,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562832088] [2021-11-16 21:27:05,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:27:05,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-16 21:27:05,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:27:05,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-16 21:27:05,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-11-16 21:27:05,861 INFO L87 Difference]: Start difference. First operand 102 states and 135 transitions. Second operand has 9 states, 7 states have (on average 5.857142857142857) internal successors, (41), 8 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-16 21:27:06,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:27:06,014 INFO L93 Difference]: Finished difference Result 194 states and 259 transitions. [2021-11-16 21:27:06,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-16 21:27:06,015 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 5.857142857142857) internal successors, (41), 8 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 73 [2021-11-16 21:27:06,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:27:06,016 INFO L225 Difference]: With dead ends: 194 [2021-11-16 21:27:06,017 INFO L226 Difference]: Without dead ends: 106 [2021-11-16 21:27:06,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-11-16 21:27:06,018 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 130 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 21:27:06,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 713 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 21:27:06,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-16 21:27:06,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2021-11-16 21:27:06,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 67 states have (on average 1.208955223880597) internal successors, (81), 69 states have internal predecessors, (81), 28 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2021-11-16 21:27:06,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 138 transitions. [2021-11-16 21:27:06,025 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 138 transitions. Word has length 73 [2021-11-16 21:27:06,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:27:06,029 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 138 transitions. [2021-11-16 21:27:06,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 5.857142857142857) internal successors, (41), 8 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-16 21:27:06,029 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 138 transitions. [2021-11-16 21:27:06,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-16 21:27:06,030 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:27:06,030 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-11-16 21:27:06,063 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 21:27:06,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:27:06,244 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:27:06,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:27:06,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1237560575, now seen corresponding path program 1 times [2021-11-16 21:27:06,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:27:06,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719412044] [2021-11-16 21:27:06,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:27:06,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:27:06,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:06,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:27:06,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:06,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:27:06,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:06,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:27:06,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:06,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-16 21:27:06,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:06,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-16 21:27:06,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:06,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 21:27:06,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:06,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-16 21:27:06,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:06,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-16 21:27:06,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:06,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-16 21:27:06,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:06,398 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-16 21:27:06,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:27:06,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719412044] [2021-11-16 21:27:06,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719412044] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:27:06,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:27:06,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-16 21:27:06,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715330329] [2021-11-16 21:27:06,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:27:06,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-16 21:27:06,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:27:06,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-16 21:27:06,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-16 21:27:06,400 INFO L87 Difference]: Start difference. First operand 104 states and 138 transitions. Second operand has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 7 states have internal predecessors, (37), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-16 21:27:06,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:27:06,457 INFO L93 Difference]: Finished difference Result 194 states and 262 transitions. [2021-11-16 21:27:06,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-16 21:27:06,457 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 7 states have internal predecessors, (37), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 75 [2021-11-16 21:27:06,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:27:06,458 INFO L225 Difference]: With dead ends: 194 [2021-11-16 21:27:06,458 INFO L226 Difference]: Without dead ends: 104 [2021-11-16 21:27:06,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-16 21:27:06,459 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 65 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 21:27:06,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 527 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 21:27:06,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-16 21:27:06,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2021-11-16 21:27:06,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 67 states have (on average 1.1940298507462686) internal successors, (80), 69 states have internal predecessors, (80), 28 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2021-11-16 21:27:06,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 137 transitions. [2021-11-16 21:27:06,465 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 137 transitions. Word has length 75 [2021-11-16 21:27:06,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:27:06,466 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 137 transitions. [2021-11-16 21:27:06,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 7 states have internal predecessors, (37), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-16 21:27:06,466 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 137 transitions. [2021-11-16 21:27:06,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-16 21:27:06,467 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:27:06,467 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-11-16 21:27:06,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-16 21:27:06,467 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:27:06,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:27:06,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1187141198, now seen corresponding path program 1 times [2021-11-16 21:27:06,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:27:06,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094574601] [2021-11-16 21:27:06,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:27:06,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:27:06,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:06,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:27:06,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:06,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:27:06,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:06,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:27:06,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:06,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 21:27:06,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:06,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 21:27:06,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:06,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-16 21:27:06,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:06,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-16 21:27:06,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:06,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-16 21:27:06,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:06,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-16 21:27:06,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:06,571 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-16 21:27:06,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:27:06,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094574601] [2021-11-16 21:27:06,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094574601] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:27:06,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:27:06,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-16 21:27:06,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499050583] [2021-11-16 21:27:06,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:27:06,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-16 21:27:06,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:27:06,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-16 21:27:06,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-16 21:27:06,573 INFO L87 Difference]: Start difference. First operand 104 states and 137 transitions. Second operand has 5 states, 4 states have (on average 9.75) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-16 21:27:06,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:27:06,615 INFO L93 Difference]: Finished difference Result 199 states and 268 transitions. [2021-11-16 21:27:06,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 21:27:06,615 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.75) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 77 [2021-11-16 21:27:06,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:27:06,616 INFO L225 Difference]: With dead ends: 199 [2021-11-16 21:27:06,616 INFO L226 Difference]: Without dead ends: 109 [2021-11-16 21:27:06,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-16 21:27:06,617 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 26 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 21:27:06,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 441 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 21:27:06,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-16 21:27:06,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2021-11-16 21:27:06,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 68 states have (on average 1.1911764705882353) internal successors, (81), 70 states have internal predecessors, (81), 28 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2021-11-16 21:27:06,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 138 transitions. [2021-11-16 21:27:06,623 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 138 transitions. Word has length 77 [2021-11-16 21:27:06,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:27:06,623 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 138 transitions. [2021-11-16 21:27:06,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.75) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-16 21:27:06,624 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 138 transitions. [2021-11-16 21:27:06,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-16 21:27:06,624 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:27:06,624 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:27:06,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-16 21:27:06,625 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:27:06,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:27:06,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1548809988, now seen corresponding path program 1 times [2021-11-16 21:27:06,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:27:06,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641660090] [2021-11-16 21:27:06,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:27:06,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:27:06,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:06,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:27:06,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:06,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:27:06,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:06,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:27:06,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:06,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-16 21:27:06,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:06,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-16 21:27:06,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:06,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-16 21:27:06,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:06,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-16 21:27:06,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:06,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-16 21:27:06,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:06,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-16 21:27:06,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:06,723 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-16 21:27:06,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:27:06,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641660090] [2021-11-16 21:27:06,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641660090] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:27:06,723 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:27:06,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-16 21:27:06,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445367206] [2021-11-16 21:27:06,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:27:06,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-16 21:27:06,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:27:06,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-16 21:27:06,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-16 21:27:06,725 INFO L87 Difference]: Start difference. First operand 105 states and 138 transitions. Second operand has 5 states, 4 states have (on average 10.0) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-16 21:27:06,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:27:06,767 INFO L93 Difference]: Finished difference Result 202 states and 273 transitions. [2021-11-16 21:27:06,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 21:27:06,768 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 10.0) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 78 [2021-11-16 21:27:06,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:27:06,769 INFO L225 Difference]: With dead ends: 202 [2021-11-16 21:27:06,769 INFO L226 Difference]: Without dead ends: 111 [2021-11-16 21:27:06,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-16 21:27:06,770 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 23 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 21:27:06,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 449 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 21:27:06,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-16 21:27:06,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 106. [2021-11-16 21:27:06,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 69 states have (on average 1.1884057971014492) internal successors, (82), 71 states have internal predecessors, (82), 28 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2021-11-16 21:27:06,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 139 transitions. [2021-11-16 21:27:06,775 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 139 transitions. Word has length 78 [2021-11-16 21:27:06,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:27:06,776 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 139 transitions. [2021-11-16 21:27:06,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 10.0) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-16 21:27:06,776 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 139 transitions. [2021-11-16 21:27:06,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-16 21:27:06,788 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:27:06,788 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-11-16 21:27:06,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-16 21:27:06,788 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:27:06,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:27:06,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1185344546, now seen corresponding path program 1 times [2021-11-16 21:27:06,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:27:06,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464279977] [2021-11-16 21:27:06,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:27:06,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:27:06,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:06,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:27:06,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:06,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:27:06,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:06,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:27:06,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:06,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:27:06,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:06,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-16 21:27:06,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:06,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-16 21:27:06,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:06,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-16 21:27:06,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:06,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-16 21:27:06,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:06,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-16 21:27:06,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:06,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-11-16 21:27:06,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:06,906 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-16 21:27:06,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:27:06,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464279977] [2021-11-16 21:27:06,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464279977] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:27:06,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942122717] [2021-11-16 21:27:06,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:27:06,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:27:06,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:27:06,908 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 21:27:06,909 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 21:27:07,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:07,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-16 21:27:07,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:27:07,204 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-16 21:27:07,204 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:27:07,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942122717] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:27:07,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:27:07,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 12 [2021-11-16 21:27:07,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000199930] [2021-11-16 21:27:07,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:27:07,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-16 21:27:07,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:27:07,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-16 21:27:07,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-16 21:27:07,206 INFO L87 Difference]: Start difference. First operand 106 states and 139 transitions. Second operand has 10 states, 8 states have (on average 6.5) internal successors, (52), 9 states have internal predecessors, (52), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-16 21:27:07,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:27:07,406 INFO L93 Difference]: Finished difference Result 203 states and 268 transitions. [2021-11-16 21:27:07,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-16 21:27:07,407 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 6.5) internal successors, (52), 9 states have internal predecessors, (52), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 86 [2021-11-16 21:27:07,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:27:07,408 INFO L225 Difference]: With dead ends: 203 [2021-11-16 21:27:07,408 INFO L226 Difference]: Without dead ends: 111 [2021-11-16 21:27:07,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-11-16 21:27:07,409 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 132 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 21:27:07,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 709 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 21:27:07,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-16 21:27:07,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2021-11-16 21:27:07,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 70 states have (on average 1.1857142857142857) internal successors, (83), 72 states have internal predecessors, (83), 28 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2021-11-16 21:27:07,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 140 transitions. [2021-11-16 21:27:07,414 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 140 transitions. Word has length 86 [2021-11-16 21:27:07,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:27:07,414 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 140 transitions. [2021-11-16 21:27:07,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 6.5) internal successors, (52), 9 states have internal predecessors, (52), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-16 21:27:07,415 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 140 transitions. [2021-11-16 21:27:07,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-16 21:27:07,415 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:27:07,415 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-11-16 21:27:07,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-16 21:27:07,630 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,SelfDestructingSolverStorable8 [2021-11-16 21:27:07,630 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:27:07,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:27:07,631 INFO L85 PathProgramCache]: Analyzing trace with hash 172862485, now seen corresponding path program 1 times [2021-11-16 21:27:07,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:27:07,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551501784] [2021-11-16 21:27:07,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:27:07,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:27:07,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:07,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:27:07,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:07,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:27:07,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:07,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:27:07,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:07,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:27:07,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:07,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 21:27:07,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:07,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 21:27:07,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:07,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-16 21:27:07,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:07,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-16 21:27:07,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:07,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-16 21:27:07,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:07,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-16 21:27:07,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:07,781 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-16 21:27:07,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:27:07,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551501784] [2021-11-16 21:27:07,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551501784] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:27:07,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218950119] [2021-11-16 21:27:07,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:27:07,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:27:07,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:27:07,796 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 21:27:07,797 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 21:27:07,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:07,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-16 21:27:07,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:27:08,092 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-16 21:27:08,093 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:27:08,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218950119] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:27:08,093 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:27:08,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [8] total 17 [2021-11-16 21:27:08,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541198733] [2021-11-16 21:27:08,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:27:08,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-16 21:27:08,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:27:08,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-16 21:27:08,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-11-16 21:27:08,094 INFO L87 Difference]: Start difference. First operand 107 states and 140 transitions. Second operand has 11 states, 9 states have (on average 6.0) internal successors, (54), 10 states have internal predecessors, (54), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-16 21:27:08,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:27:08,334 INFO L93 Difference]: Finished difference Result 208 states and 274 transitions. [2021-11-16 21:27:08,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-16 21:27:08,335 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 6.0) internal successors, (54), 10 states have internal predecessors, (54), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 88 [2021-11-16 21:27:08,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:27:08,336 INFO L225 Difference]: With dead ends: 208 [2021-11-16 21:27:08,336 INFO L226 Difference]: Without dead ends: 115 [2021-11-16 21:27:08,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2021-11-16 21:27:08,337 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 136 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 21:27:08,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 889 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 21:27:08,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-11-16 21:27:08,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 108. [2021-11-16 21:27:08,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 73 states have internal predecessors, (84), 28 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2021-11-16 21:27:08,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 141 transitions. [2021-11-16 21:27:08,348 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 141 transitions. Word has length 88 [2021-11-16 21:27:08,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:27:08,348 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 141 transitions. [2021-11-16 21:27:08,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 6.0) internal successors, (54), 10 states have internal predecessors, (54), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-16 21:27:08,349 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 141 transitions. [2021-11-16 21:27:08,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-16 21:27:08,349 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:27:08,349 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-11-16 21:27:08,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-16 21:27:08,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:27:08,566 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:27:08,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:27:08,567 INFO L85 PathProgramCache]: Analyzing trace with hash 759251201, now seen corresponding path program 1 times [2021-11-16 21:27:08,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:27:08,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332771776] [2021-11-16 21:27:08,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:27:08,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:27:08,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:08,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:27:08,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:08,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:27:08,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:08,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:27:08,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:08,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:27:08,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:08,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 21:27:08,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:08,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-16 21:27:08,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:08,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-16 21:27:08,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:08,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-16 21:27:08,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:08,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-16 21:27:08,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:08,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-16 21:27:08,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:08,990 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-16 21:27:08,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:27:08,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332771776] [2021-11-16 21:27:08,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332771776] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:27:08,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:27:08,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-11-16 21:27:08,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060244130] [2021-11-16 21:27:08,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:27:08,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-16 21:27:08,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:27:08,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-16 21:27:08,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-11-16 21:27:08,993 INFO L87 Difference]: Start difference. First operand 108 states and 141 transitions. Second operand has 15 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-16 21:27:09,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:27:09,531 INFO L93 Difference]: Finished difference Result 164 states and 230 transitions. [2021-11-16 21:27:09,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-16 21:27:09,532 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 89 [2021-11-16 21:27:09,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:27:09,533 INFO L225 Difference]: With dead ends: 164 [2021-11-16 21:27:09,533 INFO L226 Difference]: Without dead ends: 162 [2021-11-16 21:27:09,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-11-16 21:27:09,534 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 56 mSDsluCounter, 1253 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1384 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-16 21:27:09,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 1384 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-16 21:27:09,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-16 21:27:09,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 143. [2021-11-16 21:27:09,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 88 states have (on average 1.1590909090909092) internal successors, (102), 92 states have internal predecessors, (102), 43 states have call successors, (43), 9 states have call predecessors, (43), 11 states have return successors, (51), 41 states have call predecessors, (51), 42 states have call successors, (51) [2021-11-16 21:27:09,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 196 transitions. [2021-11-16 21:27:09,542 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 196 transitions. Word has length 89 [2021-11-16 21:27:09,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:27:09,542 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 196 transitions. [2021-11-16 21:27:09,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-16 21:27:09,542 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 196 transitions. [2021-11-16 21:27:09,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-16 21:27:09,543 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:27:09,543 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-11-16 21:27:09,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-16 21:27:09,543 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:27:09,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:27:09,544 INFO L85 PathProgramCache]: Analyzing trace with hash -50095425, now seen corresponding path program 1 times [2021-11-16 21:27:09,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:27:09,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769403479] [2021-11-16 21:27:09,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:27:09,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:27:09,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:09,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:27:09,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:09,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:27:09,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:09,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:27:09,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:09,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:27:09,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:09,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 21:27:09,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:09,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-16 21:27:09,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:09,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-16 21:27:09,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:09,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-16 21:27:09,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:09,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-16 21:27:09,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:09,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-16 21:27:09,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:09,712 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-16 21:27:09,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:27:09,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769403479] [2021-11-16 21:27:09,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769403479] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:27:09,713 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:27:09,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-16 21:27:09,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681439955] [2021-11-16 21:27:09,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:27:09,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-16 21:27:09,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:27:09,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-16 21:27:09,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-16 21:27:09,714 INFO L87 Difference]: Start difference. First operand 143 states and 196 transitions. Second operand has 11 states, 10 states have (on average 5.4) internal successors, (54), 10 states have internal predecessors, (54), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-16 21:27:09,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:27:09,932 INFO L93 Difference]: Finished difference Result 243 states and 336 transitions. [2021-11-16 21:27:09,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-16 21:27:09,933 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.4) internal successors, (54), 10 states have internal predecessors, (54), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 89 [2021-11-16 21:27:09,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:27:09,934 INFO L225 Difference]: With dead ends: 243 [2021-11-16 21:27:09,934 INFO L226 Difference]: Without dead ends: 149 [2021-11-16 21:27:09,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-11-16 21:27:09,934 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 54 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 872 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-16 21:27:09,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 872 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-16 21:27:09,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-16 21:27:09,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2021-11-16 21:27:09,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 92 states have (on average 1.1630434782608696) internal successors, (107), 97 states have internal predecessors, (107), 43 states have call successors, (43), 9 states have call predecessors, (43), 12 states have return successors, (56), 41 states have call predecessors, (56), 42 states have call successors, (56) [2021-11-16 21:27:09,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 206 transitions. [2021-11-16 21:27:09,968 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 206 transitions. Word has length 89 [2021-11-16 21:27:09,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:27:09,969 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 206 transitions. [2021-11-16 21:27:09,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.4) internal successors, (54), 10 states have internal predecessors, (54), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-16 21:27:09,969 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 206 transitions. [2021-11-16 21:27:09,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-16 21:27:09,970 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:27:09,971 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-11-16 21:27:09,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-16 21:27:09,971 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:27:09,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:27:09,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1974343619, now seen corresponding path program 1 times [2021-11-16 21:27:09,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:27:09,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411541902] [2021-11-16 21:27:09,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:27:09,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:27:10,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:10,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:27:10,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:10,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:27:10,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:10,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-16 21:27:10,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:10,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:27:10,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:10,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-16 21:27:10,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:10,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-16 21:27:10,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:10,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-16 21:27:10,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:10,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-16 21:27:10,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:10,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-16 21:27:10,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:10,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-11-16 21:27:10,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:10,351 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-16 21:27:10,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:27:10,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411541902] [2021-11-16 21:27:10,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411541902] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:27:10,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204113897] [2021-11-16 21:27:10,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:27:10,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:27:10,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:27:10,368 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 21:27:10,369 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 21:27:10,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:10,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-16 21:27:10,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:27:10,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:27:10,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-16 21:27:10,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:27:10,699 INFO L354 Elim1Store]: treesize reduction 132, result has 15.4 percent of original size [2021-11-16 21:27:10,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 72 treesize of output 44 [2021-11-16 21:27:13,589 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-16 21:27:13,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:27:15,435 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 5966 treesize of output 5902 [2021-11-16 21:27:16,193 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-16 21:27:16,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204113897] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:27:16,193 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 21:27:16,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 12] total 33 [2021-11-16 21:27:16,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673884613] [2021-11-16 21:27:16,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 21:27:16,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-16 21:27:16,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:27:16,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-16 21:27:16,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=959, Unknown=1, NotChecked=0, Total=1056 [2021-11-16 21:27:16,198 INFO L87 Difference]: Start difference. First operand 148 states and 206 transitions. Second operand has 33 states, 30 states have (on average 3.8666666666666667) internal successors, (116), 33 states have internal predecessors, (116), 9 states have call successors, (24), 3 states have call predecessors, (24), 6 states have return successors, (22), 6 states have call predecessors, (22), 9 states have call successors, (22) [2021-11-16 21:27:19,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:27:19,008 INFO L93 Difference]: Finished difference Result 332 states and 469 transitions. [2021-11-16 21:27:19,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-16 21:27:19,009 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 3.8666666666666667) internal successors, (116), 33 states have internal predecessors, (116), 9 states have call successors, (24), 3 states have call predecessors, (24), 6 states have return successors, (22), 6 states have call predecessors, (22), 9 states have call successors, (22) Word has length 91 [2021-11-16 21:27:19,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:27:19,010 INFO L225 Difference]: With dead ends: 332 [2021-11-16 21:27:19,010 INFO L226 Difference]: Without dead ends: 216 [2021-11-16 21:27:19,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 182 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=172, Invalid=1718, Unknown=2, NotChecked=0, Total=1892 [2021-11-16 21:27:19,011 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 89 mSDsluCounter, 2972 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 3130 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 254 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-16 21:27:19,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 3130 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 668 Invalid, 0 Unknown, 254 Unchecked, 0.4s Time] [2021-11-16 21:27:19,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-11-16 21:27:19,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 184. [2021-11-16 21:27:19,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 123 states have (on average 1.1788617886178863) internal successors, (145), 129 states have internal predecessors, (145), 46 states have call successors, (46), 11 states have call predecessors, (46), 14 states have return successors, (63), 43 states have call predecessors, (63), 45 states have call successors, (63) [2021-11-16 21:27:19,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 254 transitions. [2021-11-16 21:27:19,022 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 254 transitions. Word has length 91 [2021-11-16 21:27:19,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:27:19,022 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 254 transitions. [2021-11-16 21:27:19,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 3.8666666666666667) internal successors, (116), 33 states have internal predecessors, (116), 9 states have call successors, (24), 3 states have call predecessors, (24), 6 states have return successors, (22), 6 states have call predecessors, (22), 9 states have call successors, (22) [2021-11-16 21:27:19,022 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 254 transitions. [2021-11-16 21:27:19,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-16 21:27:19,023 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:27:19,024 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-11-16 21:27:19,044 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 21:27:19,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:27:19,232 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:27:19,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:27:19,234 INFO L85 PathProgramCache]: Analyzing trace with hash -443122435, now seen corresponding path program 1 times [2021-11-16 21:27:19,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:27:19,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034684967] [2021-11-16 21:27:19,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:27:19,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:27:19,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:19,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:27:19,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:19,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:27:19,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:19,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:27:19,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:19,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:27:19,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:19,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 21:27:19,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:19,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-16 21:27:19,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:19,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-16 21:27:19,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:19,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-16 21:27:19,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:19,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-16 21:27:19,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:19,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-16 21:27:19,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:19,427 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-16 21:27:19,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:27:19,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034684967] [2021-11-16 21:27:19,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034684967] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:27:19,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:27:19,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-16 21:27:19,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357864574] [2021-11-16 21:27:19,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:27:19,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-16 21:27:19,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:27:19,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-16 21:27:19,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-16 21:27:19,429 INFO L87 Difference]: Start difference. First operand 184 states and 254 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 5 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-16 21:27:19,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:27:19,529 INFO L93 Difference]: Finished difference Result 312 states and 435 transitions. [2021-11-16 21:27:19,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-16 21:27:19,529 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 5 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 89 [2021-11-16 21:27:19,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:27:19,531 INFO L225 Difference]: With dead ends: 312 [2021-11-16 21:27:19,531 INFO L226 Difference]: Without dead ends: 186 [2021-11-16 21:27:19,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-16 21:27:19,532 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 37 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 21:27:19,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 775 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 21:27:19,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-11-16 21:27:19,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 183. [2021-11-16 21:27:19,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 123 states have (on average 1.1788617886178863) internal successors, (145), 129 states have internal predecessors, (145), 45 states have call successors, (45), 11 states have call predecessors, (45), 14 states have return successors, (58), 42 states have call predecessors, (58), 44 states have call successors, (58) [2021-11-16 21:27:19,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 248 transitions. [2021-11-16 21:27:19,556 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 248 transitions. Word has length 89 [2021-11-16 21:27:19,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:27:19,556 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 248 transitions. [2021-11-16 21:27:19,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 5 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-16 21:27:19,557 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 248 transitions. [2021-11-16 21:27:19,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-16 21:27:19,557 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:27:19,558 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-11-16 21:27:19,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-16 21:27:19,558 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:27:19,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:27:19,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1447052805, now seen corresponding path program 2 times [2021-11-16 21:27:19,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:27:19,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379799302] [2021-11-16 21:27:19,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:27:19,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:27:19,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:19,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:27:19,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:19,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:27:19,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:19,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 21:27:19,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:19,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:27:19,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:19,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-16 21:27:19,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:19,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-16 21:27:19,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:19,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-16 21:27:19,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:19,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-16 21:27:19,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:19,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-16 21:27:19,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:19,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-16 21:27:19,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:19,901 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-16 21:27:19,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:27:19,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379799302] [2021-11-16 21:27:19,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379799302] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:27:19,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503627409] [2021-11-16 21:27:19,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-16 21:27:19,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:27:19,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:27:19,903 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 21:27:19,947 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 21:27:20,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-16 21:27:20,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 21:27:20,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 80 conjunts are in the unsatisfiable core [2021-11-16 21:27:20,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:27:20,189 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-16 21:27:20,189 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 68 treesize of output 53 [2021-11-16 21:27:20,199 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-16 21:27:20,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 43 [2021-11-16 21:27:21,136 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-16 21:27:21,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:27:22,908 INFO L354 Elim1Store]: treesize reduction 321, result has 34.5 percent of original size [2021-11-16 21:27:22,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 2504 treesize of output 2360 [2021-11-16 21:27:22,946 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 9291 treesize of output 8915 [2021-11-16 21:27:23,278 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-11-16 21:27:23,279 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 6850 treesize of output 6834 [2021-11-16 21:27:35,282 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-16 21:27:35,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-16 21:27:35,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-11-16 21:27:35,352 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-16 21:27:35,371 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-16 21:27:35,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-16 21:27:35,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-11-16 21:27:35,412 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-16 21:27:35,479 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-16 21:27:35,508 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-16 21:27:35,774 INFO L354 Elim1Store]: treesize reduction 22, result has 63.9 percent of original size [2021-11-16 21:27:35,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 139 treesize of output 155 [2021-11-16 21:27:36,238 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-16 21:27:36,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503627409] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:27:36,239 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 21:27:36,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 18] total 42 [2021-11-16 21:27:36,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077194843] [2021-11-16 21:27:36,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 21:27:36,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-16 21:27:36,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:27:36,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-16 21:27:36,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1582, Unknown=0, NotChecked=0, Total=1722 [2021-11-16 21:27:36,242 INFO L87 Difference]: Start difference. First operand 183 states and 248 transitions. Second operand has 42 states, 38 states have (on average 3.4210526315789473) internal successors, (130), 37 states have internal predecessors, (130), 10 states have call successors, (25), 4 states have call predecessors, (25), 7 states have return successors, (23), 7 states have call predecessors, (23), 9 states have call successors, (23) [2021-11-16 21:27:38,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:27:38,447 INFO L93 Difference]: Finished difference Result 376 states and 520 transitions. [2021-11-16 21:27:38,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-16 21:27:38,448 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 38 states have (on average 3.4210526315789473) internal successors, (130), 37 states have internal predecessors, (130), 10 states have call successors, (25), 4 states have call predecessors, (25), 7 states have return successors, (23), 7 states have call predecessors, (23), 9 states have call successors, (23) Word has length 93 [2021-11-16 21:27:38,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:27:38,449 INFO L225 Difference]: With dead ends: 376 [2021-11-16 21:27:38,449 INFO L226 Difference]: Without dead ends: 248 [2021-11-16 21:27:38,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=324, Invalid=3336, Unknown=0, NotChecked=0, Total=3660 [2021-11-16 21:27:38,450 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 218 mSDsluCounter, 3281 mSDsCounter, 0 mSdLazyCounter, 1610 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 3444 SdHoareTripleChecker+Invalid, 2072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 333 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-16 21:27:38,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 3444 Invalid, 2072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1610 Invalid, 0 Unknown, 333 Unchecked, 1.2s Time] [2021-11-16 21:27:38,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-11-16 21:27:38,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 178. [2021-11-16 21:27:38,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 119 states have (on average 1.1512605042016806) internal successors, (137), 124 states have internal predecessors, (137), 44 states have call successors, (44), 11 states have call predecessors, (44), 14 states have return successors, (53), 42 states have call predecessors, (53), 43 states have call successors, (53) [2021-11-16 21:27:38,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 234 transitions. [2021-11-16 21:27:38,460 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 234 transitions. Word has length 93 [2021-11-16 21:27:38,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:27:38,461 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 234 transitions. [2021-11-16 21:27:38,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 38 states have (on average 3.4210526315789473) internal successors, (130), 37 states have internal predecessors, (130), 10 states have call successors, (25), 4 states have call predecessors, (25), 7 states have return successors, (23), 7 states have call predecessors, (23), 9 states have call successors, (23) [2021-11-16 21:27:38,461 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 234 transitions. [2021-11-16 21:27:38,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-16 21:27:38,462 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:27:38,462 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:27:38,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-16 21:27:38,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-16 21:27:38,679 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:27:38,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:27:38,680 INFO L85 PathProgramCache]: Analyzing trace with hash -270009515, now seen corresponding path program 1 times [2021-11-16 21:27:38,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:27:38,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762897590] [2021-11-16 21:27:38,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:27:38,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:27:38,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:39,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:27:39,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:39,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:27:39,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:39,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:27:39,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:39,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:27:39,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:39,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 21:27:39,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:39,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-16 21:27:39,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:39,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-16 21:27:39,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:39,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-16 21:27:39,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:39,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-16 21:27:39,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:39,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-16 21:27:39,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:39,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-16 21:27:39,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:39,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-16 21:27:39,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:39,150 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-16 21:27:39,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:27:39,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762897590] [2021-11-16 21:27:39,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762897590] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:27:39,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:27:39,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-16 21:27:39,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123096429] [2021-11-16 21:27:39,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:27:39,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-16 21:27:39,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:27:39,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-16 21:27:39,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-11-16 21:27:39,151 INFO L87 Difference]: Start difference. First operand 178 states and 234 transitions. Second operand has 16 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 7 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-16 21:27:39,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:27:39,877 INFO L93 Difference]: Finished difference Result 207 states and 280 transitions. [2021-11-16 21:27:39,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-16 21:27:39,878 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 7 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 103 [2021-11-16 21:27:39,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:27:39,879 INFO L225 Difference]: With dead ends: 207 [2021-11-16 21:27:39,879 INFO L226 Difference]: Without dead ends: 205 [2021-11-16 21:27:39,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-11-16 21:27:39,880 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 51 mSDsluCounter, 1379 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1513 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-16 21:27:39,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 1513 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-16 21:27:39,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-11-16 21:27:39,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 186. [2021-11-16 21:27:39,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 124 states have (on average 1.1451612903225807) internal successors, (142), 130 states have internal predecessors, (142), 45 states have call successors, (45), 12 states have call predecessors, (45), 16 states have return successors, (57), 43 states have call predecessors, (57), 44 states have call successors, (57) [2021-11-16 21:27:39,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 244 transitions. [2021-11-16 21:27:39,889 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 244 transitions. Word has length 103 [2021-11-16 21:27:39,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:27:39,889 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 244 transitions. [2021-11-16 21:27:39,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 7 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-16 21:27:39,890 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 244 transitions. [2021-11-16 21:27:39,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-16 21:27:39,891 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:27:39,891 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:27:39,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-16 21:27:39,891 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:27:39,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:27:39,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1079356141, now seen corresponding path program 1 times [2021-11-16 21:27:39,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:27:39,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500389354] [2021-11-16 21:27:39,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:27:39,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:27:39,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:40,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:27:40,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:40,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:27:40,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:40,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:27:40,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:40,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:27:40,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:40,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 21:27:40,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:40,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-16 21:27:40,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:40,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-16 21:27:40,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:40,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-16 21:27:40,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:40,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-16 21:27:40,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:40,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-16 21:27:40,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:40,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-16 21:27:40,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:40,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-16 21:27:40,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:40,276 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-16 21:27:40,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:27:40,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500389354] [2021-11-16 21:27:40,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500389354] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:27:40,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:27:40,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-16 21:27:40,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923319276] [2021-11-16 21:27:40,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:27:40,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-16 21:27:40,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:27:40,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-16 21:27:40,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-16 21:27:40,279 INFO L87 Difference]: Start difference. First operand 186 states and 244 transitions. Second operand has 14 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 7 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-16 21:27:40,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:27:40,831 INFO L93 Difference]: Finished difference Result 312 states and 415 transitions. [2021-11-16 21:27:40,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-16 21:27:40,832 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 7 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 103 [2021-11-16 21:27:40,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:27:40,833 INFO L225 Difference]: With dead ends: 312 [2021-11-16 21:27:40,833 INFO L226 Difference]: Without dead ends: 204 [2021-11-16 21:27:40,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-11-16 21:27:40,834 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 65 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 1028 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-16 21:27:40,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 1028 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-16 21:27:40,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-11-16 21:27:40,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 186. [2021-11-16 21:27:40,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 124 states have (on average 1.1451612903225807) internal successors, (142), 130 states have internal predecessors, (142), 45 states have call successors, (45), 12 states have call predecessors, (45), 16 states have return successors, (55), 43 states have call predecessors, (55), 44 states have call successors, (55) [2021-11-16 21:27:40,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 242 transitions. [2021-11-16 21:27:40,855 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 242 transitions. Word has length 103 [2021-11-16 21:27:40,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:27:40,856 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 242 transitions. [2021-11-16 21:27:40,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 7 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-16 21:27:40,856 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 242 transitions. [2021-11-16 21:27:40,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-16 21:27:40,857 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:27:40,857 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:27:40,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-16 21:27:40,857 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:27:40,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:27:40,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1472383151, now seen corresponding path program 1 times [2021-11-16 21:27:40,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:27:40,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963741162] [2021-11-16 21:27:40,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:27:40,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:27:40,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:40,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:27:40,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:40,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:27:40,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:40,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:27:40,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:40,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:27:40,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:40,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 21:27:40,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:40,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-16 21:27:40,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:40,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-16 21:27:40,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:40,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-16 21:27:40,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:40,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-16 21:27:40,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:40,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-16 21:27:41,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:41,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-16 21:27:41,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:41,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-16 21:27:41,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:41,050 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-16 21:27:41,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:27:41,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963741162] [2021-11-16 21:27:41,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963741162] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:27:41,051 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:27:41,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-16 21:27:41,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762591877] [2021-11-16 21:27:41,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:27:41,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-16 21:27:41,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:27:41,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-16 21:27:41,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-16 21:27:41,053 INFO L87 Difference]: Start difference. First operand 186 states and 242 transitions. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-16 21:27:41,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:27:41,151 INFO L93 Difference]: Finished difference Result 286 states and 369 transitions. [2021-11-16 21:27:41,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-16 21:27:41,151 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 103 [2021-11-16 21:27:41,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:27:41,152 INFO L225 Difference]: With dead ends: 286 [2021-11-16 21:27:41,152 INFO L226 Difference]: Without dead ends: 177 [2021-11-16 21:27:41,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-16 21:27:41,153 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 36 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 21:27:41,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 785 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 21:27:41,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-11-16 21:27:41,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2021-11-16 21:27:41,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 118 states have (on average 1.1355932203389831) internal successors, (134), 122 states have internal predecessors, (134), 44 states have call successors, (44), 12 states have call predecessors, (44), 14 states have return successors, (48), 42 states have call predecessors, (48), 43 states have call successors, (48) [2021-11-16 21:27:41,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 226 transitions. [2021-11-16 21:27:41,162 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 226 transitions. Word has length 103 [2021-11-16 21:27:41,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:27:41,163 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 226 transitions. [2021-11-16 21:27:41,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-16 21:27:41,163 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 226 transitions. [2021-11-16 21:27:41,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-16 21:27:41,164 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:27:41,164 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 2, 2, 2, 2, 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] [2021-11-16 21:27:41,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-16 21:27:41,164 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:27:41,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:27:41,165 INFO L85 PathProgramCache]: Analyzing trace with hash 2046460642, now seen corresponding path program 3 times [2021-11-16 21:27:41,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:27:41,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503460449] [2021-11-16 21:27:41,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:27:41,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:27:41,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:41,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:27:41,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:41,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:27:41,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:41,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-16 21:27:41,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:41,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:27:41,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:41,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-16 21:27:41,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:41,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-16 21:27:41,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:41,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-16 21:27:41,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:41,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-16 21:27:41,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:41,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-16 21:27:41,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:41,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-16 21:27:41,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:41,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-16 21:27:41,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:41,524 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-16 21:27:41,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:27:41,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503460449] [2021-11-16 21:27:41,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503460449] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:27:41,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813740213] [2021-11-16 21:27:41,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-16 21:27:41,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:27:41,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:27:41,526 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 21:27:41,527 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 21:27:41,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-16 21:27:41,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 21:27:41,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 82 conjunts are in the unsatisfiable core [2021-11-16 21:27:41,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:27:41,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-16 21:27:41,976 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-16 21:27:41,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 22 [2021-11-16 21:27:48,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:27:48,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:27:48,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:27:48,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:27:48,045 INFO L354 Elim1Store]: treesize reduction 293, result has 15.3 percent of original size [2021-11-16 21:27:48,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 523 treesize of output 342 [2021-11-16 21:27:48,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:27:48,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:27:48,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:27:48,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:27:48,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-16 21:27:48,120 INFO L354 Elim1Store]: treesize reduction 274, result has 16.2 percent of original size [2021-11-16 21:27:48,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 187 treesize of output 114 [2021-11-16 21:27:48,719 INFO L354 Elim1Store]: treesize reduction 296, result has 22.3 percent of original size [2021-11-16 21:27:48,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 3 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 397 treesize of output 288 [2021-11-16 21:27:48,808 INFO L354 Elim1Store]: treesize reduction 339, result has 8.1 percent of original size [2021-11-16 21:27:48,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 14 new quantified variables, introduced 36 case distinctions, treesize of input 241 treesize of output 181 [2021-11-16 21:27:48,858 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-16 21:27:48,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:27:49,185 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 1175 treesize of output 1073 [2021-11-16 21:27:49,266 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 3602 treesize of output 3530 [2021-11-16 21:27:51,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813740213] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:27:51,555 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 21:27:51,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 28 [2021-11-16 21:27:51,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112065695] [2021-11-16 21:27:51,555 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 21:27:51,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-16 21:27:51,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:27:51,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-16 21:27:51,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1021, Unknown=2, NotChecked=0, Total=1122 [2021-11-16 21:27:51,556 INFO L87 Difference]: Start difference. First operand 177 states and 226 transitions. Second operand has 28 states, 25 states have (on average 4.32) internal successors, (108), 23 states have internal predecessors, (108), 11 states have call successors, (23), 6 states have call predecessors, (23), 4 states have return successors, (20), 9 states have call predecessors, (20), 10 states have call successors, (20) [2021-11-16 21:27:52,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:27:52,116 INFO L93 Difference]: Finished difference Result 232 states and 291 transitions. [2021-11-16 21:27:52,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-16 21:27:52,117 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 4.32) internal successors, (108), 23 states have internal predecessors, (108), 11 states have call successors, (23), 6 states have call predecessors, (23), 4 states have return successors, (20), 9 states have call predecessors, (20), 10 states have call successors, (20) Word has length 102 [2021-11-16 21:27:52,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:27:52,118 INFO L225 Difference]: With dead ends: 232 [2021-11-16 21:27:52,118 INFO L226 Difference]: Without dead ends: 227 [2021-11-16 21:27:52,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 109 SyntacticMatches, 12 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=173, Invalid=1717, Unknown=2, NotChecked=0, Total=1892 [2021-11-16 21:27:52,119 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 59 mSDsluCounter, 2534 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 2709 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 313 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-16 21:27:52,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 2709 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 381 Invalid, 0 Unknown, 313 Unchecked, 0.3s Time] [2021-11-16 21:27:52,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-11-16 21:27:52,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 206. [2021-11-16 21:27:52,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 142 states have (on average 1.1338028169014085) internal successors, (161), 146 states have internal predecessors, (161), 44 states have call successors, (44), 17 states have call predecessors, (44), 19 states have return successors, (47), 42 states have call predecessors, (47), 43 states have call successors, (47) [2021-11-16 21:27:52,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 252 transitions. [2021-11-16 21:27:52,129 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 252 transitions. Word has length 102 [2021-11-16 21:27:52,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:27:52,129 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 252 transitions. [2021-11-16 21:27:52,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 4.32) internal successors, (108), 23 states have internal predecessors, (108), 11 states have call successors, (23), 6 states have call predecessors, (23), 4 states have return successors, (20), 9 states have call predecessors, (20), 10 states have call successors, (20) [2021-11-16 21:27:52,130 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 252 transitions. [2021-11-16 21:27:52,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-16 21:27:52,130 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:27:52,131 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:27:52,151 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 21:27:52,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:27:52,349 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:27:52,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:27:52,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1303128156, now seen corresponding path program 1 times [2021-11-16 21:27:52,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:27:52,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980933449] [2021-11-16 21:27:52,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:27:52,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:27:52,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:52,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:27:52,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:52,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:27:52,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:52,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:27:52,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:52,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:27:52,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:52,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 21:27:52,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:52,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-16 21:27:52,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:52,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-16 21:27:52,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:52,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-16 21:27:52,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:52,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-16 21:27:52,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:52,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-16 21:27:52,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:52,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-16 21:27:52,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:52,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-16 21:27:52,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:52,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-11-16 21:27:52,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:52,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-16 21:27:52,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:52,795 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-16 21:27:52,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:27:52,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980933449] [2021-11-16 21:27:52,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980933449] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:27:52,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607499568] [2021-11-16 21:27:52,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:27:52,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:27:52,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:27:52,797 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 21:27:52,798 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 21:27:52,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:52,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 83 conjunts are in the unsatisfiable core [2021-11-16 21:27:52,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:27:53,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:27:53,579 INFO L354 Elim1Store]: treesize reduction 1373, result has 22.9 percent of original size [2021-11-16 21:27:53,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 4713 treesize of output 2927 [2021-11-16 21:27:53,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:27:54,123 INFO L354 Elim1Store]: treesize reduction 1048, result has 27.7 percent of original size [2021-11-16 21:27:54,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 8 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 10 new quantified variables, introduced 24 case distinctions, treesize of input 11924 treesize of output 5295 [2021-11-16 21:27:54,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:27:54,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:27:54,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:27:54,414 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-16 21:27:54,415 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 7 case distinctions, treesize of input 112 treesize of output 114 [2021-11-16 21:27:54,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:27:54,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:27:54,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-16 21:27:54,706 INFO L354 Elim1Store]: treesize reduction 24, result has 11.1 percent of original size [2021-11-16 21:27:54,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 218 treesize of output 201 [2021-11-16 21:27:54,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:27:54,854 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-11-16 21:27:54,855 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 2 case distinctions, treesize of input 26 treesize of output 10 [2021-11-16 21:27:55,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:27:55,067 INFO L354 Elim1Store]: treesize reduction 57, result has 19.7 percent of original size [2021-11-16 21:27:55,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 27 [2021-11-16 21:27:55,335 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-16 21:27:55,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:27:55,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:27:55,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2021-11-16 21:27:56,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:27:56,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:27:56,186 INFO L354 Elim1Store]: treesize reduction 28, result has 72.3 percent of original size [2021-11-16 21:27:56,187 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 266 treesize of output 290 [2021-11-16 21:28:03,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:28:03,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:28:03,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-16 21:28:03,520 INFO L354 Elim1Store]: treesize reduction 24, result has 11.1 percent of original size [2021-11-16 21:28:03,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 43 [2021-11-16 21:28:03,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:28:03,774 INFO L354 Elim1Store]: treesize reduction 44, result has 38.0 percent of original size [2021-11-16 21:28:03,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 66 [2021-11-16 21:28:03,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:28:03,882 INFO L354 Elim1Store]: treesize reduction 13, result has 51.9 percent of original size [2021-11-16 21:28:03,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 54 [2021-11-16 21:28:04,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:28:04,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:28:04,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:28:04,239 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-16 21:28:04,239 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 7 case distinctions, treesize of input 70 treesize of output 80 [2021-11-16 21:28:05,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:28:05,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:28:05,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-16 21:28:05,852 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-11-16 21:28:05,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 13 [2021-11-16 21:28:05,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:28:05,918 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-16 21:28:05,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 13 [2021-11-16 21:28:06,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:28:06,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:28:06,190 INFO L354 Elim1Store]: treesize reduction 16, result has 71.9 percent of original size [2021-11-16 21:28:06,190 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 5 case distinctions, treesize of input 60 treesize of output 80 [2021-11-16 21:28:06,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:28:06,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:28:06,345 INFO L354 Elim1Store]: treesize reduction 43, result has 24.6 percent of original size [2021-11-16 21:28:06,346 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 4 case distinctions, treesize of input 43 treesize of output 37 [2021-11-16 21:28:06,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:28:06,578 INFO L354 Elim1Store]: treesize reduction 26, result has 61.2 percent of original size [2021-11-16 21:28:06,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 80 [2021-11-16 21:28:06,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:28:06,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:28:06,764 INFO L354 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2021-11-16 21:28:06,764 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 5 case distinctions, treesize of input 53 treesize of output 61 [2021-11-16 21:28:06,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:28:06,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:28:06,846 INFO L354 Elim1Store]: treesize reduction 16, result has 71.9 percent of original size [2021-11-16 21:28:06,846 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 4 case distinctions, treesize of input 60 treesize of output 80 [2021-11-16 21:28:06,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:28:06,969 INFO L354 Elim1Store]: treesize reduction 16, result has 40.7 percent of original size [2021-11-16 21:28:06,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 41 [2021-11-16 21:28:07,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:28:07,108 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 41 treesize of output 27 [2021-11-16 21:28:07,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:28:07,286 INFO L354 Elim1Store]: treesize reduction 14, result has 79.1 percent of original size [2021-11-16 21:28:07,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 67 treesize of output 99 [2021-11-16 21:28:14,772 INFO L354 Elim1Store]: treesize reduction 390, result has 39.5 percent of original size [2021-11-16 21:28:14,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 18 new quantified variables, introduced 45 case distinctions, treesize of input 451 treesize of output 459 [2021-11-16 21:28:15,073 INFO L354 Elim1Store]: treesize reduction 496, result has 33.1 percent of original size [2021-11-16 21:28:15,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 17 new quantified variables, introduced 66 case distinctions, treesize of input 453 treesize of output 548 [2021-11-16 21:30:22,209 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-16 21:30:22,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:30:36,989 WARN L227 SmtUtils]: Spent 10.18s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-16 21:30:47,257 WARN L227 SmtUtils]: Spent 10.17s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-16 21:30:55,179 INFO L354 Elim1Store]: treesize reduction 13366, result has 0.0 percent of original size [2021-11-16 21:30:55,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 11 new quantified variables, introduced 40 case distinctions, treesize of input 6097482 treesize of output 1 [2021-11-16 21:30:55,310 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-16 21:30:55,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607499568] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:30:55,311 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 21:30:55,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 28, 16] total 53 [2021-11-16 21:30:55,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193918033] [2021-11-16 21:30:55,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 21:30:55,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-16 21:30:55,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:30:55,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-16 21:30:55,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=2585, Unknown=2, NotChecked=0, Total=2756 [2021-11-16 21:30:55,313 INFO L87 Difference]: Start difference. First operand 206 states and 252 transitions. Second operand has 53 states, 44 states have (on average 3.1363636363636362) internal successors, (138), 43 states have internal predecessors, (138), 17 states have call successors, (39), 6 states have call predecessors, (39), 13 states have return successors, (35), 14 states have call predecessors, (35), 15 states have call successors, (35) [2021-11-16 21:30:57,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:30:57,944 INFO L93 Difference]: Finished difference Result 259 states and 309 transitions. [2021-11-16 21:30:57,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-16 21:30:57,945 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 44 states have (on average 3.1363636363636362) internal successors, (138), 43 states have internal predecessors, (138), 17 states have call successors, (39), 6 states have call predecessors, (39), 13 states have return successors, (35), 14 states have call predecessors, (35), 15 states have call successors, (35) Word has length 117 [2021-11-16 21:30:57,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:30:57,946 INFO L225 Difference]: With dead ends: 259 [2021-11-16 21:30:57,946 INFO L226 Difference]: Without dead ends: 256 [2021-11-16 21:30:57,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 227 SyntacticMatches, 7 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1232 ImplicationChecksByTransitivity, 35.6s TimeCoverageRelationStatistics Valid=380, Invalid=5780, Unknown=2, NotChecked=0, Total=6162 [2021-11-16 21:30:57,948 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 119 mSDsluCounter, 3202 mSDsCounter, 0 mSdLazyCounter, 1172 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 3311 SdHoareTripleChecker+Invalid, 1768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 529 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-16 21:30:57,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 3311 Invalid, 1768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1172 Invalid, 0 Unknown, 529 Unchecked, 0.9s Time] [2021-11-16 21:30:57,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-11-16 21:30:57,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 243. [2021-11-16 21:30:57,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 170 states have (on average 1.1352941176470588) internal successors, (193), 176 states have internal predecessors, (193), 46 states have call successors, (46), 22 states have call predecessors, (46), 26 states have return successors, (53), 44 states have call predecessors, (53), 45 states have call successors, (53) [2021-11-16 21:30:57,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 292 transitions. [2021-11-16 21:30:57,967 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 292 transitions. Word has length 117 [2021-11-16 21:30:57,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:30:57,969 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 292 transitions. [2021-11-16 21:30:57,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 44 states have (on average 3.1363636363636362) internal successors, (138), 43 states have internal predecessors, (138), 17 states have call successors, (39), 6 states have call predecessors, (39), 13 states have return successors, (35), 14 states have call predecessors, (35), 15 states have call successors, (35) [2021-11-16 21:30:57,969 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 292 transitions. [2021-11-16 21:30:57,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-16 21:30:57,970 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:30:57,971 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-16 21:30:58,001 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 21:30:58,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:30:58,184 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:30:58,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:30:58,184 INFO L85 PathProgramCache]: Analyzing trace with hash -2112474782, now seen corresponding path program 1 times [2021-11-16 21:30:58,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:30:58,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666510595] [2021-11-16 21:30:58,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:30:58,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:30:58,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:58,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:30:58,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:58,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:30:58,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:58,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:30:58,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:58,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:30:58,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:58,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 21:30:58,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:58,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-16 21:30:58,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:58,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-16 21:30:58,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:58,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-16 21:30:58,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:58,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-16 21:30:58,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:58,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-16 21:30:58,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:58,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-16 21:30:58,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:58,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-16 21:30:58,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:58,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-11-16 21:30:58,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:58,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-16 21:30:58,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:58,557 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-16 21:30:58,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:30:58,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666510595] [2021-11-16 21:30:58,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666510595] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:30:58,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:30:58,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-11-16 21:30:58,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691250676] [2021-11-16 21:30:58,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:30:58,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-16 21:30:58,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:30:58,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-16 21:30:58,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-11-16 21:30:58,558 INFO L87 Difference]: Start difference. First operand 243 states and 292 transitions. Second operand has 15 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 8 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2021-11-16 21:30:58,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:30:58,960 INFO L93 Difference]: Finished difference Result 351 states and 430 transitions. [2021-11-16 21:30:58,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-16 21:30:58,961 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 8 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) Word has length 117 [2021-11-16 21:30:58,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:30:58,962 INFO L225 Difference]: With dead ends: 351 [2021-11-16 21:30:58,962 INFO L226 Difference]: Without dead ends: 266 [2021-11-16 21:30:58,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-11-16 21:30:58,963 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 61 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 1004 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-16 21:30:58,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 1004 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-16 21:30:58,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-11-16 21:30:58,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 247. [2021-11-16 21:30:58,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 174 states have (on average 1.1436781609195403) internal successors, (199), 180 states have internal predecessors, (199), 46 states have call successors, (46), 22 states have call predecessors, (46), 26 states have return successors, (53), 44 states have call predecessors, (53), 45 states have call successors, (53) [2021-11-16 21:30:58,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 298 transitions. [2021-11-16 21:30:58,975 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 298 transitions. Word has length 117 [2021-11-16 21:30:58,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:30:58,977 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 298 transitions. [2021-11-16 21:30:58,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 8 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2021-11-16 21:30:58,977 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 298 transitions. [2021-11-16 21:30:58,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-16 21:30:58,978 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:30:58,978 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:30:58,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-16 21:30:58,978 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:30:58,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:30:58,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1789465504, now seen corresponding path program 1 times [2021-11-16 21:30:58,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:30:58,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241666004] [2021-11-16 21:30:58,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:30:58,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:30:58,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:59,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:30:59,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:59,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:30:59,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:59,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:30:59,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:59,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:30:59,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:59,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 21:30:59,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:59,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-16 21:30:59,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:59,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-16 21:30:59,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:59,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-16 21:30:59,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:59,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-16 21:30:59,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:59,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-16 21:30:59,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:59,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-16 21:30:59,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:59,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-16 21:30:59,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:59,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-11-16 21:30:59,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:59,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-16 21:30:59,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:59,221 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-16 21:30:59,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:30:59,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241666004] [2021-11-16 21:30:59,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241666004] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:30:59,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:30:59,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-16 21:30:59,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596058241] [2021-11-16 21:30:59,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:30:59,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-16 21:30:59,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:30:59,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-16 21:30:59,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-16 21:30:59,222 INFO L87 Difference]: Start difference. First operand 247 states and 298 transitions. Second operand has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 11 states have internal predecessors, (65), 6 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-16 21:30:59,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:30:59,391 INFO L93 Difference]: Finished difference Result 354 states and 432 transitions. [2021-11-16 21:30:59,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-16 21:30:59,393 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 11 states have internal predecessors, (65), 6 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 117 [2021-11-16 21:30:59,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:30:59,394 INFO L225 Difference]: With dead ends: 354 [2021-11-16 21:30:59,394 INFO L226 Difference]: Without dead ends: 256 [2021-11-16 21:30:59,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-11-16 21:30:59,395 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 46 mSDsluCounter, 960 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 1080 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 21:30:59,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 1080 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 21:30:59,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-11-16 21:30:59,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 238. [2021-11-16 21:30:59,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 168 states have (on average 1.130952380952381) internal successors, (190), 173 states have internal predecessors, (190), 44 states have call successors, (44), 22 states have call predecessors, (44), 25 states have return successors, (47), 42 states have call predecessors, (47), 43 states have call successors, (47) [2021-11-16 21:30:59,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 281 transitions. [2021-11-16 21:30:59,408 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 281 transitions. Word has length 117 [2021-11-16 21:30:59,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:30:59,408 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 281 transitions. [2021-11-16 21:30:59,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 11 states have internal predecessors, (65), 6 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-16 21:30:59,408 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 281 transitions. [2021-11-16 21:30:59,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-16 21:30:59,409 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:30:59,409 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:30:59,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-16 21:30:59,409 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:30:59,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:30:59,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1263280266, now seen corresponding path program 1 times [2021-11-16 21:30:59,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:30:59,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524340072] [2021-11-16 21:30:59,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:30:59,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:30:59,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:59,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:30:59,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:59,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:30:59,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:59,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-16 21:30:59,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:00,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:31:00,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:00,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-16 21:31:00,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:00,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-16 21:31:00,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:00,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-16 21:31:00,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:00,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-16 21:31:00,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:00,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-16 21:31:00,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:00,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-16 21:31:00,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:00,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-16 21:31:00,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:00,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-16 21:31:00,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:00,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-16 21:31:00,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:00,710 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 23 proven. 21 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-16 21:31:00,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:31:00,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524340072] [2021-11-16 21:31:00,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524340072] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:31:00,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933407689] [2021-11-16 21:31:00,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:31:00,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:31:00,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:31:00,712 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 21:31:00,713 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 21:31:00,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:00,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 108 conjunts are in the unsatisfiable core [2021-11-16 21:31:00,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:31:00,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-16 21:31:01,111 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-16 21:31:01,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 27 [2021-11-16 21:31:39,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:31:39,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:31:39,468 INFO L354 Elim1Store]: treesize reduction 313, result has 15.4 percent of original size [2021-11-16 21:31:39,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 560 treesize of output 367 [2021-11-16 21:31:39,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:31:39,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-16 21:31:39,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:31:39,523 INFO L354 Elim1Store]: treesize reduction 303, result has 13.4 percent of original size [2021-11-16 21:31:39,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 206 treesize of output 104 [2021-11-16 21:31:41,173 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-16 21:31:41,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:31:42,072 INFO L354 Elim1Store]: treesize reduction 3460, result has 0.6 percent of original size [2021-11-16 21:31:42,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 129266 treesize of output 110462 [2021-11-16 21:31:42,687 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-16 21:31:42,688 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:31:42,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2021-11-16 21:31:42,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455051049] [2021-11-16 21:31:42,688 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-16 21:31:42,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-16 21:31:42,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:31:42,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-16 21:31:42,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=3490, Unknown=3, NotChecked=0, Total=3660 [2021-11-16 21:31:42,690 INFO L87 Difference]: Start difference. First operand 238 states and 281 transitions. Second operand has 34 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 29 states have internal predecessors, (76), 11 states have call successors, (15), 3 states have call predecessors, (15), 6 states have return successors, (13), 8 states have call predecessors, (13), 10 states have call successors, (13) [2021-11-16 21:31:52,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:31:52,409 INFO L93 Difference]: Finished difference Result 348 states and 439 transitions. [2021-11-16 21:31:52,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-16 21:31:52,409 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 29 states have internal predecessors, (76), 11 states have call successors, (15), 3 states have call predecessors, (15), 6 states have return successors, (13), 8 states have call predecessors, (13), 10 states have call successors, (13) Word has length 116 [2021-11-16 21:31:52,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:31:52,411 INFO L225 Difference]: With dead ends: 348 [2021-11-16 21:31:52,411 INFO L226 Difference]: Without dead ends: 346 [2021-11-16 21:31:52,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 127 SyntacticMatches, 13 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1217 ImplicationChecksByTransitivity, 47.5s TimeCoverageRelationStatistics Valid=337, Invalid=7139, Unknown=6, NotChecked=0, Total=7482 [2021-11-16 21:31:52,413 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 163 mSDsluCounter, 2527 mSDsCounter, 0 mSdLazyCounter, 2692 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 2629 SdHoareTripleChecker+Invalid, 2792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 2692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-16 21:31:52,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 2629 Invalid, 2792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 2692 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-16 21:31:52,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-11-16 21:31:52,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 274. [2021-11-16 21:31:52,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 186 states have (on average 1.1236559139784945) internal successors, (209), 192 states have internal predecessors, (209), 59 states have call successors, (59), 24 states have call predecessors, (59), 28 states have return successors, (64), 57 states have call predecessors, (64), 58 states have call successors, (64) [2021-11-16 21:31:52,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 332 transitions. [2021-11-16 21:31:52,448 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 332 transitions. Word has length 116 [2021-11-16 21:31:52,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:31:52,450 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 332 transitions. [2021-11-16 21:31:52,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 29 states have internal predecessors, (76), 11 states have call successors, (15), 3 states have call predecessors, (15), 6 states have return successors, (13), 8 states have call predecessors, (13), 10 states have call successors, (13) [2021-11-16 21:31:52,450 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 332 transitions. [2021-11-16 21:31:52,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-16 21:31:52,455 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:31:52,455 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 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] [2021-11-16 21:31:52,473 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 21:31:52,657 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,SelfDestructingSolverStorable22 [2021-11-16 21:31:52,658 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:31:52,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:31:52,658 INFO L85 PathProgramCache]: Analyzing trace with hash -2072626892, now seen corresponding path program 1 times [2021-11-16 21:31:52,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:31:52,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540547847] [2021-11-16 21:31:52,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:31:52,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:31:52,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:52,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:31:52,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:53,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:31:53,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:53,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-16 21:31:53,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:53,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:31:53,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:53,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-16 21:31:53,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:53,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-16 21:31:53,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:53,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-16 21:31:53,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:53,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-16 21:31:53,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:53,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-16 21:31:53,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:53,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-16 21:31:53,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:53,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-16 21:31:53,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:53,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-16 21:31:53,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:53,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-16 21:31:53,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:53,327 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-16 21:31:53,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:31:53,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540547847] [2021-11-16 21:31:53,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540547847] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:31:53,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648570998] [2021-11-16 21:31:53,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:31:53,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:31:53,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:31:53,340 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 21:31:53,375 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 21:31:53,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:53,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 94 conjunts are in the unsatisfiable core [2021-11-16 21:31:53,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:31:53,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-16 21:31:53,679 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-16 21:31:53,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2021-11-16 21:32:11,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:32:11,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-16 21:32:11,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:32:12,022 INFO L354 Elim1Store]: treesize reduction 564, result has 16.3 percent of original size [2021-11-16 21:32:12,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 224 treesize of output 137 [2021-11-16 21:32:12,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:32:12,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 83 [2021-11-16 21:32:24,652 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 21 proven. 17 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-16 21:32:24,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:32:24,856 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 3638 treesize of output 3566 [2021-11-16 21:32:29,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648570998] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:32:29,206 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 21:32:29,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 37 [2021-11-16 21:32:29,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668526071] [2021-11-16 21:32:29,206 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 21:32:29,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-16 21:32:29,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:32:29,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-16 21:32:29,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1433, Unknown=5, NotChecked=0, Total=1560 [2021-11-16 21:32:29,207 INFO L87 Difference]: Start difference. First operand 274 states and 332 transitions. Second operand has 37 states, 34 states have (on average 3.6176470588235294) internal successors, (123), 35 states have internal predecessors, (123), 15 states have call successors, (28), 6 states have call predecessors, (28), 6 states have return successors, (25), 12 states have call predecessors, (25), 14 states have call successors, (25) [2021-11-16 21:32:36,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:32:36,761 INFO L93 Difference]: Finished difference Result 483 states and 620 transitions. [2021-11-16 21:32:36,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-16 21:32:36,761 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 3.6176470588235294) internal successors, (123), 35 states have internal predecessors, (123), 15 states have call successors, (28), 6 states have call predecessors, (28), 6 states have return successors, (25), 12 states have call predecessors, (25), 14 states have call successors, (25) Word has length 116 [2021-11-16 21:32:36,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:32:36,763 INFO L225 Difference]: With dead ends: 483 [2021-11-16 21:32:36,763 INFO L226 Difference]: Without dead ends: 374 [2021-11-16 21:32:36,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 139 SyntacticMatches, 13 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 41.3s TimeCoverageRelationStatistics Valid=232, Invalid=3182, Unknown=8, NotChecked=0, Total=3422 [2021-11-16 21:32:36,765 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 97 mSDsluCounter, 3496 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 3688 SdHoareTripleChecker+Invalid, 1594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 672 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-16 21:32:36,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 3688 Invalid, 1594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 883 Invalid, 0 Unknown, 672 Unchecked, 0.8s Time] [2021-11-16 21:32:36,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-11-16 21:32:36,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 311. [2021-11-16 21:32:36,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 210 states have (on average 1.1047619047619048) internal successors, (232), 216 states have internal predecessors, (232), 68 states have call successors, (68), 28 states have call predecessors, (68), 32 states have return successors, (73), 66 states have call predecessors, (73), 67 states have call successors, (73) [2021-11-16 21:32:36,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 373 transitions. [2021-11-16 21:32:36,786 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 373 transitions. Word has length 116 [2021-11-16 21:32:36,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:32:36,787 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 373 transitions. [2021-11-16 21:32:36,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 3.6176470588235294) internal successors, (123), 35 states have internal predecessors, (123), 15 states have call successors, (28), 6 states have call predecessors, (28), 6 states have return successors, (25), 12 states have call predecessors, (25), 14 states have call successors, (25) [2021-11-16 21:32:36,787 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 373 transitions. [2021-11-16 21:32:36,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-16 21:32:36,788 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:32:36,788 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:32:36,805 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 21:32:37,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-16 21:32:37,006 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:32:37,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:32:37,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1360457194, now seen corresponding path program 1 times [2021-11-16 21:32:37,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:32:37,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472552209] [2021-11-16 21:32:37,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:32:37,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:32:37,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:32:37,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:32:37,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:32:37,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:32:37,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:32:37,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:32:37,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:32:37,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:32:37,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:32:37,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 21:32:37,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:32:37,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-16 21:32:37,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:32:37,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-16 21:32:37,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:32:37,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-16 21:32:37,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:32:37,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-16 21:32:37,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:32:37,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-16 21:32:37,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:32:37,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-16 21:32:37,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:32:37,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-16 21:32:37,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:32:37,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-11-16 21:32:37,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:32:37,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-16 21:32:37,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:32:37,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-11-16 21:32:37,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:32:37,174 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-16 21:32:37,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:32:37,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472552209] [2021-11-16 21:32:37,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472552209] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:32:37,175 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:32:37,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-16 21:32:37,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729968199] [2021-11-16 21:32:37,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:32:37,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-16 21:32:37,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:32:37,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-16 21:32:37,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-16 21:32:37,176 INFO L87 Difference]: Start difference. First operand 311 states and 373 transitions. Second operand has 6 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-16 21:32:37,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:32:37,281 INFO L93 Difference]: Finished difference Result 317 states and 378 transitions. [2021-11-16 21:32:37,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-16 21:32:37,281 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 123 [2021-11-16 21:32:37,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:32:37,283 INFO L225 Difference]: With dead ends: 317 [2021-11-16 21:32:37,283 INFO L226 Difference]: Without dead ends: 315 [2021-11-16 21:32:37,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-16 21:32:37,284 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 8 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 21:32:37,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 572 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 21:32:37,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-11-16 21:32:37,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 315. [2021-11-16 21:32:37,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 213 states have (on average 1.1032863849765258) internal successors, (235), 219 states have internal predecessors, (235), 68 states have call successors, (68), 29 states have call predecessors, (68), 33 states have return successors, (73), 66 states have call predecessors, (73), 67 states have call successors, (73) [2021-11-16 21:32:37,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 376 transitions. [2021-11-16 21:32:37,307 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 376 transitions. Word has length 123 [2021-11-16 21:32:37,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:32:37,307 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 376 transitions. [2021-11-16 21:32:37,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-16 21:32:37,308 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 376 transitions. [2021-11-16 21:32:37,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-16 21:32:37,309 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:32:37,309 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:32:37,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-16 21:32:37,309 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:32:37,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:32:37,309 INFO L85 PathProgramCache]: Analyzing trace with hash -319363785, now seen corresponding path program 2 times [2021-11-16 21:32:37,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:32:37,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573729093] [2021-11-16 21:32:37,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:32:37,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:32:37,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:32:37,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:32:37,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:32:37,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:32:37,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:32:37,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-16 21:32:37,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:32:37,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:32:37,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:32:37,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-16 21:32:37,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:32:37,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-16 21:32:37,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:32:37,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-16 21:32:37,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:32:37,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-11-16 21:32:37,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:32:37,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-16 21:32:37,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:32:37,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-16 21:32:37,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:32:37,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-11-16 21:32:37,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:32:37,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-11-16 21:32:37,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:32:37,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-16 21:32:37,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:32:37,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-11-16 21:32:37,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:32:37,728 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-16 21:32:37,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:32:37,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573729093] [2021-11-16 21:32:37,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573729093] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:32:37,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335221275] [2021-11-16 21:32:37,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-16 21:32:37,729 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:32:37,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:32:37,730 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 21:32:37,731 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 21:32:37,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-16 21:32:37,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 21:32:37,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 108 conjunts are in the unsatisfiable core [2021-11-16 21:32:37,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:32:37,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:32:37,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-16 21:32:37,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-16 21:32:37,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:32:37,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-16 21:32:38,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:32:38,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:32:38,087 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-16 21:32:38,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 137 treesize of output 89 [2021-11-16 21:32:38,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:32:38,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:32:38,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:32:38,122 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-16 21:32:38,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 91 [2021-11-16 21:32:48,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:32:48,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-16 21:32:48,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:32:48,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:32:48,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:32:48,853 INFO L354 Elim1Store]: treesize reduction 314, result has 0.3 percent of original size [2021-11-16 21:32:48,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 7 disjoint index pairs (out of 66 index pairs), introduced 14 new quantified variables, introduced 47 case distinctions, treesize of input 157 treesize of output 1 [2021-11-16 21:32:48,928 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 30 proven. 19 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-16 21:32:48,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:32:51,252 INFO L354 Elim1Store]: treesize reduction 2651, result has 25.5 percent of original size [2021-11-16 21:32:51,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 363528 treesize of output 358209 Killed by 15