./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_byte_cursor_satisfies_pred_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_byte_cursor_satisfies_pred_harness.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 21e14c4abf3c8c626ff1e4d64bac7246a96ab8c19ab8b6f263006a7e1f8fc191 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-16 20:58:37,056 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-16 20:58:37,058 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-16 20:58:37,080 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-16 20:58:37,080 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-16 20:58:37,081 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-16 20:58:37,082 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-16 20:58:37,083 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-16 20:58:37,084 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-16 20:58:37,085 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-16 20:58:37,086 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-16 20:58:37,086 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-16 20:58:37,087 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-16 20:58:37,087 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-16 20:58:37,104 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-16 20:58:37,105 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-16 20:58:37,106 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-16 20:58:37,107 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-16 20:58:37,108 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-16 20:58:37,109 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-16 20:58:37,110 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-16 20:58:37,111 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-16 20:58:37,112 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-16 20:58:37,113 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-16 20:58:37,121 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-16 20:58:37,125 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-16 20:58:37,126 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-16 20:58:37,126 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-16 20:58:37,127 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-16 20:58:37,128 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-16 20:58:37,128 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-16 20:58:37,129 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-16 20:58:37,130 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-16 20:58:37,130 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-16 20:58:37,131 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-16 20:58:37,131 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-16 20:58:37,132 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-16 20:58:37,132 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-16 20:58:37,132 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-16 20:58:37,133 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-16 20:58:37,133 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-16 20:58:37,134 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-16 20:58:37,160 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-16 20:58:37,166 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-16 20:58:37,167 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-16 20:58:37,167 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-16 20:58:37,167 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-16 20:58:37,168 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-16 20:58:37,168 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-16 20:58:37,168 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-16 20:58:37,168 INFO L138 SettingsManager]: * Use SBE=true [2021-11-16 20:58:37,168 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-16 20:58:37,169 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-16 20:58:37,174 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-16 20:58:37,174 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-16 20:58:37,175 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-16 20:58:37,175 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-16 20:58:37,175 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-16 20:58:37,175 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-16 20:58:37,175 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-16 20:58:37,175 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-16 20:58:37,175 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-16 20:58:37,176 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-16 20:58:37,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-16 20:58:37,176 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-16 20:58:37,176 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-16 20:58:37,176 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-16 20:58:37,176 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-16 20:58:37,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-16 20:58:37,177 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-16 20:58:37,177 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-16 20:58:37,178 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-16 20:58:37,178 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-16 20:58:37,178 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 21e14c4abf3c8c626ff1e4d64bac7246a96ab8c19ab8b6f263006a7e1f8fc191 [2021-11-16 20:58:37,404 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-16 20:58:37,422 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-16 20:58:37,424 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-16 20:58:37,424 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-16 20:58:37,425 INFO L275 PluginConnector]: CDTParser initialized [2021-11-16 20:58:37,426 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_byte_cursor_satisfies_pred_harness.i [2021-11-16 20:58:37,466 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90a985ed9/532379866f99419687c651c25cf451e5/FLAGe1ee16f92 [2021-11-16 20:58:38,018 INFO L306 CDTParser]: Found 1 translation units. [2021-11-16 20:58:38,018 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_cursor_satisfies_pred_harness.i [2021-11-16 20:58:38,043 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90a985ed9/532379866f99419687c651c25cf451e5/FLAGe1ee16f92 [2021-11-16 20:58:38,504 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90a985ed9/532379866f99419687c651c25cf451e5 [2021-11-16 20:58:38,506 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-16 20:58:38,507 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-16 20:58:38,508 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-16 20:58:38,509 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-16 20:58:38,511 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-16 20:58:38,512 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:58:38" (1/1) ... [2021-11-16 20:58:38,512 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b1956aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:58:38, skipping insertion in model container [2021-11-16 20:58:38,513 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:58:38" (1/1) ... [2021-11-16 20:58:38,517 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-16 20:58:38,626 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-16 20:58:38,826 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_cursor_satisfies_pred_harness.i[4504,4517] [2021-11-16 20:58:38,833 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_cursor_satisfies_pred_harness.i[4564,4577] [2021-11-16 20:58:38,855 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-16 20:58:38,861 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-16 20:58:39,334 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:58:39,334 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:58:39,335 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:58:39,335 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:58:39,336 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:58:39,344 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:58:39,344 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:58:39,345 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:58:39,346 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:58:39,591 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-16 20:58:39,592 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-16 20:58:39,592 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-16 20:58:39,606 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-16 20:58:39,607 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-16 20:58:39,607 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-16 20:58:39,607 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-16 20:58:39,608 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-16 20:58:39,608 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-16 20:58:39,609 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-16 20:58:39,745 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-16 20:58:39,844 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:58:39,846 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:58:39,896 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-16 20:58:39,927 INFO L203 MainTranslator]: Completed pre-run [2021-11-16 20:58:39,939 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_cursor_satisfies_pred_harness.i[4504,4517] [2021-11-16 20:58:39,939 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_cursor_satisfies_pred_harness.i[4564,4577] [2021-11-16 20:58:39,940 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-16 20:58:39,941 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-16 20:58:39,958 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:58:39,959 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:58:39,959 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:58:39,959 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:58:39,959 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:58:39,963 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:58:39,963 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:58:39,964 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:58:39,964 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:58:39,981 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-16 20:58:39,982 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-16 20:58:39,982 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-16 20:58:39,983 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-16 20:58:39,984 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-16 20:58:39,984 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-16 20:58:39,984 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-16 20:58:39,984 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-16 20:58:39,985 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-16 20:58:39,985 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-16 20:58:40,016 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-16 20:58:40,051 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:58:40,052 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:58:40,076 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-16 20:58:40,239 INFO L208 MainTranslator]: Completed translation [2021-11-16 20:58:40,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:58:40 WrapperNode [2021-11-16 20:58:40,239 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-16 20:58:40,240 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-16 20:58:40,240 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-16 20:58:40,240 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-16 20:58:40,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:58:40" (1/1) ... [2021-11-16 20:58:40,347 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:58:40" (1/1) ... [2021-11-16 20:58:40,414 INFO L137 Inliner]: procedures = 692, calls = 2616, calls flagged for inlining = 62, calls inlined = 9, statements flattened = 807 [2021-11-16 20:58:40,414 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-16 20:58:40,415 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-16 20:58:40,415 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-16 20:58:40,415 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-16 20:58:40,421 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:58:40" (1/1) ... [2021-11-16 20:58:40,421 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:58:40" (1/1) ... [2021-11-16 20:58:40,430 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:58:40" (1/1) ... [2021-11-16 20:58:40,431 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:58:40" (1/1) ... [2021-11-16 20:58:40,458 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:58:40" (1/1) ... [2021-11-16 20:58:40,475 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:58:40" (1/1) ... [2021-11-16 20:58:40,483 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:58:40" (1/1) ... [2021-11-16 20:58:40,495 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-16 20:58:40,496 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-16 20:58:40,496 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-16 20:58:40,496 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-16 20:58:40,497 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:58:40" (1/1) ... [2021-11-16 20:58:40,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-16 20:58:40,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:58:40,531 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-16 20:58:40,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-16 20:58:40,563 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2021-11-16 20:58:40,563 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2021-11-16 20:58:40,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-16 20:58:40,564 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-16 20:58:40,564 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-16 20:58:40,564 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-16 20:58:40,565 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-16 20:58:40,565 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-16 20:58:40,565 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_left_trim_pred [2021-11-16 20:58:40,566 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_left_trim_pred [2021-11-16 20:58:40,566 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-16 20:58:40,566 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-16 20:58:40,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-16 20:58:40,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-16 20:58:40,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-16 20:58:40,567 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-16 20:58:40,567 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-16 20:58:40,567 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-11-16 20:58:40,567 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-11-16 20:58:40,568 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-16 20:58:40,568 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-16 20:58:40,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-16 20:58:40,568 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-16 20:58:40,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-16 20:58:40,569 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~~uint8_t~0~TO~int [2021-11-16 20:58:40,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~~uint8_t~0~TO~int [2021-11-16 20:58:40,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-16 20:58:40,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-16 20:58:40,843 INFO L236 CfgBuilder]: Building ICFG [2021-11-16 20:58:40,844 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-16 20:58:41,762 INFO L277 CfgBuilder]: Performing block encoding [2021-11-16 20:58:41,768 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-16 20:58:41,768 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-16 20:58:41,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:58:41 BoogieIcfgContainer [2021-11-16 20:58:41,770 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-16 20:58:41,771 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-16 20:58:41,772 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-16 20:58:41,774 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-16 20:58:41,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 08:58:38" (1/3) ... [2021-11-16 20:58:41,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47b4d04e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:58:41, skipping insertion in model container [2021-11-16 20:58:41,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:58:40" (2/3) ... [2021-11-16 20:58:41,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47b4d04e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:58:41, skipping insertion in model container [2021-11-16 20:58:41,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:58:41" (3/3) ... [2021-11-16 20:58:41,776 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_cursor_satisfies_pred_harness.i [2021-11-16 20:58:41,779 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-16 20:58:41,780 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-16 20:58:41,820 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-16 20:58:41,833 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-16 20:58:41,833 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-16 20:58:41,851 INFO L276 IsEmpty]: Start isEmpty. Operand has 96 states, 64 states have (on average 1.234375) internal successors, (79), 65 states have internal predecessors, (79), 22 states have call successors, (22), 8 states have call predecessors, (22), 8 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-16 20:58:41,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-16 20:58:41,858 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:58:41,859 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:58:41,859 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:58:41,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:58:41,864 INFO L85 PathProgramCache]: Analyzing trace with hash 843534149, now seen corresponding path program 1 times [2021-11-16 20:58:41,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:58:41,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39002201] [2021-11-16 20:58:41,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:58:41,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:58:42,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:42,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:58:42,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:42,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:58:42,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:42,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 20:58:42,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:42,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-16 20:58:42,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:42,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 20:58:42,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:42,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:58:42,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:42,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 20:58:42,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:42,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-16 20:58:42,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:42,346 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-16 20:58:42,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:58:42,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39002201] [2021-11-16 20:58:42,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39002201] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:58:42,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:58:42,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-16 20:58:42,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846291149] [2021-11-16 20:58:42,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:58:42,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-16 20:58:42,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:58:42,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-16 20:58:42,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-16 20:58:42,380 INFO L87 Difference]: Start difference. First operand has 96 states, 64 states have (on average 1.234375) internal successors, (79), 65 states have internal predecessors, (79), 22 states have call successors, (22), 8 states have call predecessors, (22), 8 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-16 20:58:42,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:58:42,421 INFO L93 Difference]: Finished difference Result 188 states and 255 transitions. [2021-11-16 20:58:42,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-16 20:58:42,422 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2021-11-16 20:58:42,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:58:42,438 INFO L225 Difference]: With dead ends: 188 [2021-11-16 20:58:42,438 INFO L226 Difference]: Without dead ends: 87 [2021-11-16 20:58:42,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-16 20:58:42,449 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:58:42,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 20:58:42,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-16 20:58:42,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-11-16 20:58:42,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 57 states have (on average 1.1754385964912282) internal successors, (67), 58 states have internal predecessors, (67), 22 states have call successors, (22), 8 states have call predecessors, (22), 7 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-16 20:58:42,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 109 transitions. [2021-11-16 20:58:42,499 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 109 transitions. Word has length 61 [2021-11-16 20:58:42,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:58:42,499 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 109 transitions. [2021-11-16 20:58:42,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-16 20:58:42,500 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 109 transitions. [2021-11-16 20:58:42,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-16 20:58:42,505 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:58:42,505 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:58:42,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-16 20:58:42,505 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:58:42,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:58:42,506 INFO L85 PathProgramCache]: Analyzing trace with hash -2126644258, now seen corresponding path program 1 times [2021-11-16 20:58:42,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:58:42,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60068638] [2021-11-16 20:58:42,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:58:42,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:58:42,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:42,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:58:42,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:42,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:58:42,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:42,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 20:58:42,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:42,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-16 20:58:42,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:42,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 20:58:42,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:42,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:58:42,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:42,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 20:58:42,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:42,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-16 20:58:42,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:42,788 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-16 20:58:42,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:58:42,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60068638] [2021-11-16 20:58:42,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60068638] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:58:42,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180704414] [2021-11-16 20:58:42,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:58:42,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:58:42,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:58:42,812 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:58:42,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-16 20:58:43,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:43,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 2470 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-16 20:58:43,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:58:43,431 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-16 20:58:43,431 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:58:43,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180704414] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:58:43,432 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:58:43,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2021-11-16 20:58:43,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295112410] [2021-11-16 20:58:43,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:58:43,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-16 20:58:43,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:58:43,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-16 20:58:43,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-16 20:58:43,434 INFO L87 Difference]: Start difference. First operand 87 states and 109 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-16 20:58:43,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:58:43,565 INFO L93 Difference]: Finished difference Result 157 states and 202 transitions. [2021-11-16 20:58:43,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-16 20:58:43,565 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 63 [2021-11-16 20:58:43,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:58:43,568 INFO L225 Difference]: With dead ends: 157 [2021-11-16 20:58:43,568 INFO L226 Difference]: Without dead ends: 90 [2021-11-16 20:58:43,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-16 20:58:43,569 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 126 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 20:58:43,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 300 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 20:58:43,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-16 20:58:43,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-11-16 20:58:43,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 59 states have (on average 1.1694915254237288) internal successors, (69), 61 states have internal predecessors, (69), 22 states have call successors, (22), 8 states have call predecessors, (22), 8 states have return successors, (24), 20 states have call predecessors, (24), 20 states have call successors, (24) [2021-11-16 20:58:43,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 115 transitions. [2021-11-16 20:58:43,579 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 115 transitions. Word has length 63 [2021-11-16 20:58:43,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:58:43,579 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 115 transitions. [2021-11-16 20:58:43,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-16 20:58:43,580 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 115 transitions. [2021-11-16 20:58:43,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-16 20:58:43,581 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:58:43,581 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:58:43,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-16 20:58:43,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:58:43,803 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:58:43,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:58:43,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1088384551, now seen corresponding path program 1 times [2021-11-16 20:58:43,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:58:43,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530349988] [2021-11-16 20:58:43,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:58:43,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:58:43,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:43,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:58:43,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:43,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:58:43,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:43,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 20:58:43,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:43,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-16 20:58:43,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:43,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-16 20:58:43,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:44,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-16 20:58:44,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:44,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-16 20:58:44,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:44,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-16 20:58:44,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:44,058 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-16 20:58:44,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:58:44,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530349988] [2021-11-16 20:58:44,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530349988] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:58:44,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362207237] [2021-11-16 20:58:44,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:58:44,059 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:58:44,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:58:44,060 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:58:44,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-16 20:58:44,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:44,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 2475 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-16 20:58:44,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:58:44,633 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-16 20:58:44,633 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:58:44,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362207237] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:58:44,634 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:58:44,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 15 [2021-11-16 20:58:44,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831308607] [2021-11-16 20:58:44,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:58:44,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-16 20:58:44,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:58:44,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-16 20:58:44,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-11-16 20:58:44,636 INFO L87 Difference]: Start difference. First operand 90 states and 115 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, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-16 20:58:44,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:58:44,837 INFO L93 Difference]: Finished difference Result 150 states and 191 transitions. [2021-11-16 20:58:44,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-16 20:58:44,837 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, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 65 [2021-11-16 20:58:44,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:58:44,838 INFO L225 Difference]: With dead ends: 150 [2021-11-16 20:58:44,838 INFO L226 Difference]: Without dead ends: 90 [2021-11-16 20:58:44,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-11-16 20:58:44,839 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 143 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 20:58:44,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 489 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 20:58:44,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-16 20:58:44,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-11-16 20:58:44,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 59 states have (on average 1.1694915254237288) internal successors, (69), 61 states have internal predecessors, (69), 22 states have call successors, (22), 8 states have call predecessors, (22), 8 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2021-11-16 20:58:44,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 112 transitions. [2021-11-16 20:58:44,845 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 112 transitions. Word has length 65 [2021-11-16 20:58:44,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:58:44,845 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 112 transitions. [2021-11-16 20:58:44,846 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, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-16 20:58:44,846 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 112 transitions. [2021-11-16 20:58:44,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-16 20:58:44,846 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:58:44,847 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:58:44,887 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 20:58:45,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-16 20:58:45,067 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:58:45,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:58:45,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1116444153, now seen corresponding path program 1 times [2021-11-16 20:58:45,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:58:45,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010353903] [2021-11-16 20:58:45,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:58:45,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:58:45,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:45,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:58:45,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:45,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:58:45,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:45,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 20:58:45,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:45,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-16 20:58:45,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:45,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-16 20:58:45,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:45,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-16 20:58:45,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:45,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-16 20:58:45,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:45,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-16 20:58:45,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:45,322 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-16 20:58:45,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:58:45,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010353903] [2021-11-16 20:58:45,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010353903] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:58:45,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:58:45,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-16 20:58:45,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687906195] [2021-11-16 20:58:45,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:58:45,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-16 20:58:45,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:58:45,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-16 20:58:45,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-16 20:58:45,324 INFO L87 Difference]: Start difference. First operand 90 states and 112 transitions. Second operand has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-16 20:58:45,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:58:45,367 INFO L93 Difference]: Finished difference Result 102 states and 129 transitions. [2021-11-16 20:58:45,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-16 20:58:45,367 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 69 [2021-11-16 20:58:45,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:58:45,368 INFO L225 Difference]: With dead ends: 102 [2021-11-16 20:58:45,368 INFO L226 Difference]: Without dead ends: 100 [2021-11-16 20:58:45,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-16 20:58:45,369 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 16 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:58:45,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 728 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 20:58:45,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-16 20:58:45,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2021-11-16 20:58:45,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 68 states have internal predecessors, (75), 23 states have call successors, (23), 9 states have call predecessors, (23), 10 states have return successors, (28), 21 states have call predecessors, (28), 21 states have call successors, (28) [2021-11-16 20:58:45,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 126 transitions. [2021-11-16 20:58:45,376 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 126 transitions. Word has length 69 [2021-11-16 20:58:45,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:58:45,376 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 126 transitions. [2021-11-16 20:58:45,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-16 20:58:45,377 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 126 transitions. [2021-11-16 20:58:45,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-16 20:58:45,378 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:58:45,378 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:58:45,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-16 20:58:45,378 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:58:45,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:58:45,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1585986623, now seen corresponding path program 1 times [2021-11-16 20:58:45,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:58:45,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467734346] [2021-11-16 20:58:45,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:58:45,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:58:45,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:45,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:58:45,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:45,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:58:45,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:45,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 20:58:45,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:45,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-16 20:58:45,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:45,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-16 20:58:45,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:45,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-16 20:58:45,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:45,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-16 20:58:45,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:45,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-16 20:58:45,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:45,858 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-16 20:58:45,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:58:45,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467734346] [2021-11-16 20:58:45,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467734346] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:58:45,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140856312] [2021-11-16 20:58:45,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:58:45,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:58:45,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:58:45,872 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:58:45,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-16 20:58:46,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:46,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 2497 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-16 20:58:46,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:58:46,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-16 20:58:47,116 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-16 20:58:47,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:58:47,509 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-16 20:58:47,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140856312] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 20:58:47,510 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 20:58:47,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 12] total 27 [2021-11-16 20:58:47,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145888209] [2021-11-16 20:58:47,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 20:58:47,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-16 20:58:47,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:58:47,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-16 20:58:47,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2021-11-16 20:58:47,513 INFO L87 Difference]: Start difference. First operand 99 states and 126 transitions. Second operand has 27 states, 25 states have (on average 3.56) internal successors, (89), 25 states have internal predecessors, (89), 10 states have call successors, (19), 5 states have call predecessors, (19), 5 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2021-11-16 20:58:48,733 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:58:51,108 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:58:53,164 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:58:54,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:58:54,523 INFO L93 Difference]: Finished difference Result 293 states and 413 transitions. [2021-11-16 20:58:54,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-16 20:58:54,524 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 3.56) internal successors, (89), 25 states have internal predecessors, (89), 10 states have call successors, (19), 5 states have call predecessors, (19), 5 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) Word has length 73 [2021-11-16 20:58:54,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:58:54,531 INFO L225 Difference]: With dead ends: 293 [2021-11-16 20:58:54,531 INFO L226 Difference]: Without dead ends: 214 [2021-11-16 20:58:54,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 139 SyntacticMatches, 12 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=213, Invalid=1427, Unknown=0, NotChecked=0, Total=1640 [2021-11-16 20:58:54,534 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 161 mSDsluCounter, 1415 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 71 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 1563 SdHoareTripleChecker+Invalid, 1186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 373 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2021-11-16 20:58:54,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 1563 Invalid, 1186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 740 Invalid, 2 Unknown, 373 Unchecked, 6.5s Time] [2021-11-16 20:58:54,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-11-16 20:58:54,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 150. [2021-11-16 20:58:54,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 101 states have (on average 1.1683168316831682) internal successors, (118), 106 states have internal predecessors, (118), 34 states have call successors, (34), 12 states have call predecessors, (34), 14 states have return successors, (49), 31 states have call predecessors, (49), 32 states have call successors, (49) [2021-11-16 20:58:54,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 201 transitions. [2021-11-16 20:58:54,567 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 201 transitions. Word has length 73 [2021-11-16 20:58:54,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:58:54,568 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 201 transitions. [2021-11-16 20:58:54,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 3.56) internal successors, (89), 25 states have internal predecessors, (89), 10 states have call successors, (19), 5 states have call predecessors, (19), 5 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2021-11-16 20:58:54,569 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 201 transitions. [2021-11-16 20:58:54,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-16 20:58:54,571 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:58:54,572 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:58:54,597 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-16 20:58:54,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:58:54,788 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:58:54,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:58:54,788 INFO L85 PathProgramCache]: Analyzing trace with hash 999277960, now seen corresponding path program 1 times [2021-11-16 20:58:54,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:58:54,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701259651] [2021-11-16 20:58:54,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:58:54,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:58:54,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:54,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:58:54,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:54,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:58:54,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:54,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 20:58:54,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:54,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-16 20:58:54,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:54,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-16 20:58:54,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:54,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-16 20:58:54,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:54,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-16 20:58:54,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:54,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-16 20:58:54,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:55,092 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-16 20:58:55,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:58:55,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701259651] [2021-11-16 20:58:55,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701259651] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:58:55,093 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:58:55,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-16 20:58:55,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774680162] [2021-11-16 20:58:55,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:58:55,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-16 20:58:55,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:58:55,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-16 20:58:55,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-11-16 20:58:55,094 INFO L87 Difference]: Start difference. First operand 150 states and 201 transitions. Second operand has 13 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-16 20:58:57,344 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:58:57,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:58:57,623 INFO L93 Difference]: Finished difference Result 158 states and 209 transitions. [2021-11-16 20:58:57,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-16 20:58:57,624 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 75 [2021-11-16 20:58:57,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:58:57,625 INFO L225 Difference]: With dead ends: 158 [2021-11-16 20:58:57,625 INFO L226 Difference]: Without dead ends: 156 [2021-11-16 20:58:57,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-11-16 20:58:57,626 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 35 mSDsluCounter, 1024 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 15 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 1135 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-16 20:58:57,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 1135 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 181 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-16 20:58:57,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-16 20:58:57,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 150. [2021-11-16 20:58:57,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 101 states have (on average 1.1683168316831682) internal successors, (118), 106 states have internal predecessors, (118), 34 states have call successors, (34), 12 states have call predecessors, (34), 14 states have return successors, (49), 31 states have call predecessors, (49), 32 states have call successors, (49) [2021-11-16 20:58:57,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 201 transitions. [2021-11-16 20:58:57,638 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 201 transitions. Word has length 75 [2021-11-16 20:58:57,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:58:57,638 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 201 transitions. [2021-11-16 20:58:57,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-16 20:58:57,638 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 201 transitions. [2021-11-16 20:58:57,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-16 20:58:57,639 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:58:57,639 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-11-16 20:58:57,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-16 20:58:57,639 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:58:57,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:58:57,640 INFO L85 PathProgramCache]: Analyzing trace with hash 490092965, now seen corresponding path program 1 times [2021-11-16 20:58:57,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:58:57,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270533016] [2021-11-16 20:58:57,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:58:57,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:58:57,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:57,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:58:57,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:57,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:58:57,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:57,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 20:58:57,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:57,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-16 20:58:57,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:57,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:58:57,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:57,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-16 20:58:57,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:57,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-16 20:58:57,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:57,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-16 20:58:57,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:57,816 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-16 20:58:57,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:58:57,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270533016] [2021-11-16 20:58:57,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270533016] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:58:57,817 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:58:57,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-16 20:58:57,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097803203] [2021-11-16 20:58:57,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:58:57,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-16 20:58:57,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:58:57,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-16 20:58:57,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-16 20:58:57,819 INFO L87 Difference]: Start difference. First operand 150 states and 201 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-16 20:58:57,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:58:57,832 INFO L93 Difference]: Finished difference Result 219 states and 293 transitions. [2021-11-16 20:58:57,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-16 20:58:57,832 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 80 [2021-11-16 20:58:57,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:58:57,835 INFO L225 Difference]: With dead ends: 219 [2021-11-16 20:58:57,835 INFO L226 Difference]: Without dead ends: 153 [2021-11-16 20:58:57,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-16 20:58:57,836 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 0 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:58:57,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 211 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 20:58:57,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-16 20:58:57,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2021-11-16 20:58:57,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 104 states have (on average 1.1634615384615385) internal successors, (121), 109 states have internal predecessors, (121), 34 states have call successors, (34), 12 states have call predecessors, (34), 14 states have return successors, (49), 31 states have call predecessors, (49), 32 states have call successors, (49) [2021-11-16 20:58:57,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 204 transitions. [2021-11-16 20:58:57,860 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 204 transitions. Word has length 80 [2021-11-16 20:58:57,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:58:57,860 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 204 transitions. [2021-11-16 20:58:57,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-16 20:58:57,861 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 204 transitions. [2021-11-16 20:58:57,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-16 20:58:57,862 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:58:57,862 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:58:57,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-16 20:58:57,862 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:58:57,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:58:57,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1225398278, now seen corresponding path program 1 times [2021-11-16 20:58:57,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:58:57,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576293092] [2021-11-16 20:58:57,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:58:57,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:58:57,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:57,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:58:57,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:57,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:58:57,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:57,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 20:58:57,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:57,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-16 20:58:57,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:57,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:58:57,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:57,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-16 20:58:57,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:57,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-16 20:58:57,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:57,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-16 20:58:57,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:57,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-16 20:58:57,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:58,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-16 20:58:58,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:58,029 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-16 20:58:58,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:58:58,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576293092] [2021-11-16 20:58:58,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576293092] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:58:58,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:58:58,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-16 20:58:58,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795186883] [2021-11-16 20:58:58,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:58:58,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-16 20:58:58,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:58:58,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-16 20:58:58,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-16 20:58:58,032 INFO L87 Difference]: Start difference. First operand 153 states and 204 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-16 20:58:58,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:58:58,056 INFO L93 Difference]: Finished difference Result 201 states and 262 transitions. [2021-11-16 20:58:58,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 20:58:58,056 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 85 [2021-11-16 20:58:58,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:58:58,058 INFO L225 Difference]: With dead ends: 201 [2021-11-16 20:58:58,058 INFO L226 Difference]: Without dead ends: 150 [2021-11-16 20:58:58,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-16 20:58:58,059 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 18 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:58:58,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 290 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 20:58:58,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-16 20:58:58,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2021-11-16 20:58:58,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 102 states have (on average 1.1568627450980393) internal successors, (118), 106 states have internal predecessors, (118), 34 states have call successors, (34), 12 states have call predecessors, (34), 13 states have return successors, (48), 31 states have call predecessors, (48), 32 states have call successors, (48) [2021-11-16 20:58:58,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 200 transitions. [2021-11-16 20:58:58,072 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 200 transitions. Word has length 85 [2021-11-16 20:58:58,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:58:58,073 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 200 transitions. [2021-11-16 20:58:58,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-16 20:58:58,073 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 200 transitions. [2021-11-16 20:58:58,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-16 20:58:58,074 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:58:58,074 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:58:58,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-16 20:58:58,075 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:58:58,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:58:58,075 INFO L85 PathProgramCache]: Analyzing trace with hash -176228817, now seen corresponding path program 1 times [2021-11-16 20:58:58,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:58:58,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417309109] [2021-11-16 20:58:58,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:58:58,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:58:58,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:58,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:58:58,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:58,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:58:58,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:58,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 20:58:58,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:58,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-16 20:58:58,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:58,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-16 20:58:58,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:58,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-16 20:58:58,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:58,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-16 20:58:58,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:58,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-16 20:58:58,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:58,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-16 20:58:58,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:58,389 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-16 20:58:58,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:58:58,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417309109] [2021-11-16 20:58:58,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417309109] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:58:58,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4831079] [2021-11-16 20:58:58,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:58:58,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:58:58,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:58:58,391 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:58:58,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-16 20:58:58,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:58,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 2537 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-16 20:58:58,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:58:58,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-16 20:58:59,411 INFO L354 Elim1Store]: treesize reduction 25, result has 10.7 percent of original size [2021-11-16 20:58:59,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 34 [2021-11-16 20:58:59,482 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-16 20:58:59,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:58:59,750 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-16 20:58:59,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4831079] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 20:58:59,750 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 20:58:59,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 11] total 23 [2021-11-16 20:58:59,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956297656] [2021-11-16 20:58:59,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 20:58:59,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-16 20:58:59,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:58:59,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-16 20:58:59,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-11-16 20:58:59,751 INFO L87 Difference]: Start difference. First operand 150 states and 200 transitions. Second operand has 23 states, 21 states have (on average 4.285714285714286) internal successors, (90), 21 states have internal predecessors, (90), 10 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2021-11-16 20:59:03,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:59:03,246 INFO L93 Difference]: Finished difference Result 293 states and 388 transitions. [2021-11-16 20:59:03,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-16 20:59:03,247 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 4.285714285714286) internal successors, (90), 21 states have internal predecessors, (90), 10 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) Word has length 82 [2021-11-16 20:59:03,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:59:03,248 INFO L225 Difference]: With dead ends: 293 [2021-11-16 20:59:03,248 INFO L226 Difference]: Without dead ends: 201 [2021-11-16 20:59:03,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 163 SyntacticMatches, 13 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=153, Invalid=1037, Unknown=0, NotChecked=0, Total=1190 [2021-11-16 20:59:03,249 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 124 mSDsluCounter, 1174 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 1288 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 180 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-16 20:59:03,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 1288 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 726 Invalid, 0 Unknown, 180 Unchecked, 3.2s Time] [2021-11-16 20:59:03,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-11-16 20:59:03,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 164. [2021-11-16 20:59:03,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 114 states have (on average 1.131578947368421) internal successors, (129), 118 states have internal predecessors, (129), 34 states have call successors, (34), 14 states have call predecessors, (34), 15 states have return successors, (47), 31 states have call predecessors, (47), 32 states have call successors, (47) [2021-11-16 20:59:03,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 210 transitions. [2021-11-16 20:59:03,257 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 210 transitions. Word has length 82 [2021-11-16 20:59:03,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:59:03,257 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 210 transitions. [2021-11-16 20:59:03,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 4.285714285714286) internal successors, (90), 21 states have internal predecessors, (90), 10 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2021-11-16 20:59:03,258 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 210 transitions. [2021-11-16 20:59:03,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-16 20:59:03,259 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:59:03,259 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:59:03,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-16 20:59:03,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:59:03,480 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:59:03,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:59:03,480 INFO L85 PathProgramCache]: Analyzing trace with hash -146904725, now seen corresponding path program 1 times [2021-11-16 20:59:03,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:59:03,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267170859] [2021-11-16 20:59:03,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:59:03,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:59:03,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:03,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:59:03,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:03,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:59:03,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:03,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 20:59:03,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:03,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-16 20:59:03,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:03,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:59:03,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:03,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-16 20:59:03,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:03,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-16 20:59:03,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:03,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-16 20:59:03,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:03,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-16 20:59:03,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:03,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-16 20:59:03,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:03,672 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-16 20:59:03,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:59:03,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267170859] [2021-11-16 20:59:03,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267170859] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:59:03,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:59:03,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-16 20:59:03,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015911240] [2021-11-16 20:59:03,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:59:03,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-16 20:59:03,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:59:03,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-16 20:59:03,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-16 20:59:03,674 INFO L87 Difference]: Start difference. First operand 164 states and 210 transitions. Second operand has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-16 20:59:03,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:59:03,712 INFO L93 Difference]: Finished difference Result 176 states and 222 transitions. [2021-11-16 20:59:03,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-16 20:59:03,713 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 87 [2021-11-16 20:59:03,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:59:03,714 INFO L225 Difference]: With dead ends: 176 [2021-11-16 20:59:03,714 INFO L226 Difference]: Without dead ends: 174 [2021-11-16 20:59:03,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-16 20:59:03,714 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 16 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:59:03,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 720 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 20:59:03,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-11-16 20:59:03,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 169. [2021-11-16 20:59:03,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 117 states have (on average 1.1282051282051282) internal successors, (132), 121 states have internal predecessors, (132), 35 states have call successors, (35), 15 states have call predecessors, (35), 16 states have return successors, (48), 32 states have call predecessors, (48), 33 states have call successors, (48) [2021-11-16 20:59:03,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 215 transitions. [2021-11-16 20:59:03,725 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 215 transitions. Word has length 87 [2021-11-16 20:59:03,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:59:03,725 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 215 transitions. [2021-11-16 20:59:03,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-16 20:59:03,725 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 215 transitions. [2021-11-16 20:59:03,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-16 20:59:03,727 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:59:03,727 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:59:03,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-16 20:59:03,727 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:59:03,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:59:03,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1299041201, now seen corresponding path program 1 times [2021-11-16 20:59:03,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:59:03,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234518710] [2021-11-16 20:59:03,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:59:03,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:59:03,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:03,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:59:03,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:03,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:59:03,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:03,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 20:59:03,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:03,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-16 20:59:03,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:03,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:59:03,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:03,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-16 20:59:03,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:03,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-16 20:59:03,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:03,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-16 20:59:03,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:03,905 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-16 20:59:03,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:59:03,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234518710] [2021-11-16 20:59:03,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234518710] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:59:03,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528385839] [2021-11-16 20:59:03,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:59:03,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:59:03,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:59:03,921 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:59:03,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-16 20:59:04,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:04,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 2521 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-16 20:59:04,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:59:04,416 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-16 20:59:04,416 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:59:04,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528385839] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:59:04,416 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:59:04,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 10 [2021-11-16 20:59:04,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163751857] [2021-11-16 20:59:04,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:59:04,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-16 20:59:04,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:59:04,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-16 20:59:04,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-16 20:59:04,420 INFO L87 Difference]: Start difference. First operand 169 states and 215 transitions. Second operand has 9 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-16 20:59:04,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:59:04,502 INFO L93 Difference]: Finished difference Result 268 states and 343 transitions. [2021-11-16 20:59:04,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-16 20:59:04,502 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 81 [2021-11-16 20:59:04,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:59:04,503 INFO L225 Difference]: With dead ends: 268 [2021-11-16 20:59:04,503 INFO L226 Difference]: Without dead ends: 173 [2021-11-16 20:59:04,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-16 20:59:04,504 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 12 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 819 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 20:59:04,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 819 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 20:59:04,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-11-16 20:59:04,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 169. [2021-11-16 20:59:04,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 117 states have (on average 1.1282051282051282) internal successors, (132), 121 states have internal predecessors, (132), 35 states have call successors, (35), 15 states have call predecessors, (35), 16 states have return successors, (47), 32 states have call predecessors, (47), 33 states have call successors, (47) [2021-11-16 20:59:04,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 214 transitions. [2021-11-16 20:59:04,532 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 214 transitions. Word has length 81 [2021-11-16 20:59:04,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:59:04,533 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 214 transitions. [2021-11-16 20:59:04,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-16 20:59:04,533 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 214 transitions. [2021-11-16 20:59:04,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-16 20:59:04,534 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:59:04,535 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:59:04,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-16 20:59:04,755 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,SelfDestructingSolverStorable10 [2021-11-16 20:59:04,755 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:59:04,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:59:04,756 INFO L85 PathProgramCache]: Analyzing trace with hash 499080586, now seen corresponding path program 1 times [2021-11-16 20:59:04,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:59:04,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257877161] [2021-11-16 20:59:04,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:59:04,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:59:04,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:04,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:59:04,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:04,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:59:04,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:04,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 20:59:04,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:04,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-16 20:59:04,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:04,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-16 20:59:04,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:04,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-16 20:59:04,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:04,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-16 20:59:04,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:04,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-16 20:59:04,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:04,954 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-16 20:59:04,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:59:04,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257877161] [2021-11-16 20:59:04,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257877161] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:59:04,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295681999] [2021-11-16 20:59:04,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:59:04,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:59:04,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:59:04,955 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:59:04,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-16 20:59:05,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:05,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 2531 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-16 20:59:05,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:59:05,485 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-16 20:59:05,485 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:59:05,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295681999] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:59:05,485 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:59:05,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 10 [2021-11-16 20:59:05,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644247842] [2021-11-16 20:59:05,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:59:05,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-16 20:59:05,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:59:05,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-16 20:59:05,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-16 20:59:05,486 INFO L87 Difference]: Start difference. First operand 169 states and 214 transitions. Second operand has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-16 20:59:05,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:59:05,565 INFO L93 Difference]: Finished difference Result 272 states and 341 transitions. [2021-11-16 20:59:05,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-16 20:59:05,566 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 83 [2021-11-16 20:59:05,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:59:05,566 INFO L225 Difference]: With dead ends: 272 [2021-11-16 20:59:05,566 INFO L226 Difference]: Without dead ends: 168 [2021-11-16 20:59:05,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-16 20:59:05,567 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 12 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 20:59:05,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 812 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 20:59:05,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-11-16 20:59:05,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2021-11-16 20:59:05,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 116 states have (on average 1.1206896551724137) internal successors, (130), 120 states have internal predecessors, (130), 35 states have call successors, (35), 15 states have call predecessors, (35), 16 states have return successors, (46), 32 states have call predecessors, (46), 33 states have call successors, (46) [2021-11-16 20:59:05,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 211 transitions. [2021-11-16 20:59:05,575 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 211 transitions. Word has length 83 [2021-11-16 20:59:05,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:59:05,575 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 211 transitions. [2021-11-16 20:59:05,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-16 20:59:05,576 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 211 transitions. [2021-11-16 20:59:05,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-16 20:59:05,576 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:59:05,577 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:59:05,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-16 20:59:05,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:59:05,796 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:59:05,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:59:05,796 INFO L85 PathProgramCache]: Analyzing trace with hash 2124358860, now seen corresponding path program 1 times [2021-11-16 20:59:05,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:59:05,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438908997] [2021-11-16 20:59:05,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:59:05,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:59:05,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:05,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:59:05,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:05,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:59:05,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:05,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 20:59:05,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:05,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-16 20:59:05,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:05,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-16 20:59:05,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:06,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-16 20:59:06,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:06,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-16 20:59:06,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:06,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-16 20:59:06,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:06,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-16 20:59:06,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:06,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-16 20:59:06,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:06,132 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 24 proven. 11 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-16 20:59:06,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:59:06,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438908997] [2021-11-16 20:59:06,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438908997] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:59:06,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265623733] [2021-11-16 20:59:06,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:59:06,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:59:06,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:59:06,134 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:59:06,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-16 20:59:06,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:06,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 2551 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-16 20:59:06,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:59:07,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 41 [2021-11-16 20:59:07,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-11-16 20:59:07,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-11-16 20:59:07,305 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-16 20:59:07,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:59:07,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265623733] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:59:07,305 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:59:07,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [11] total 23 [2021-11-16 20:59:07,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23646261] [2021-11-16 20:59:07,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:59:07,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-16 20:59:07,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:59:07,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-16 20:59:07,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-11-16 20:59:07,308 INFO L87 Difference]: Start difference. First operand 168 states and 211 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 12 states have internal predecessors, (56), 3 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-16 20:59:09,792 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:59:11,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:59:11,582 INFO L93 Difference]: Finished difference Result 310 states and 403 transitions. [2021-11-16 20:59:11,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-16 20:59:11,582 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 12 states have internal predecessors, (56), 3 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 93 [2021-11-16 20:59:11,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:59:11,583 INFO L225 Difference]: With dead ends: 310 [2021-11-16 20:59:11,583 INFO L226 Difference]: Without dead ends: 221 [2021-11-16 20:59:11,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=204, Invalid=788, Unknown=0, NotChecked=0, Total=992 [2021-11-16 20:59:11,584 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 171 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 38 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-16 20:59:11,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 461 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 708 Invalid, 1 Unknown, 115 Unchecked, 3.8s Time] [2021-11-16 20:59:11,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-11-16 20:59:11,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 186. [2021-11-16 20:59:11,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 131 states have (on average 1.1221374045801527) internal successors, (147), 135 states have internal predecessors, (147), 36 states have call successors, (36), 16 states have call predecessors, (36), 18 states have return successors, (55), 34 states have call predecessors, (55), 34 states have call successors, (55) [2021-11-16 20:59:11,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 238 transitions. [2021-11-16 20:59:11,592 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 238 transitions. Word has length 93 [2021-11-16 20:59:11,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:59:11,592 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 238 transitions. [2021-11-16 20:59:11,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 12 states have internal predecessors, (56), 3 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-16 20:59:11,593 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 238 transitions. [2021-11-16 20:59:11,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-16 20:59:11,594 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:59:11,594 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 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 20:59:11,614 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-16 20:59:11,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:59:11,814 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:59:11,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:59:11,815 INFO L85 PathProgramCache]: Analyzing trace with hash 213316302, now seen corresponding path program 1 times [2021-11-16 20:59:11,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:59:11,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100742757] [2021-11-16 20:59:11,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:59:11,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:59:11,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:11,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:59:11,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:11,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:59:11,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:11,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 20:59:11,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:11,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-16 20:59:11,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:11,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-16 20:59:11,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:11,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-16 20:59:11,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:11,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-16 20:59:11,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:11,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-16 20:59:11,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:11,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-16 20:59:11,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:11,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-16 20:59:11,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:11,927 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-16 20:59:11,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:59:11,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100742757] [2021-11-16 20:59:11,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100742757] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:59:11,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007785132] [2021-11-16 20:59:11,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:59:11,928 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:59:11,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:59:11,929 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:59:11,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-16 20:59:12,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:12,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 2546 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-16 20:59:12,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:59:12,389 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-16 20:59:12,390 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:59:12,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007785132] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:59:12,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:59:12,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-11-16 20:59:12,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786029185] [2021-11-16 20:59:12,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:59:12,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-16 20:59:12,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:59:12,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-16 20:59:12,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-16 20:59:12,392 INFO L87 Difference]: Start difference. First operand 186 states and 238 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-16 20:59:12,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:59:12,425 INFO L93 Difference]: Finished difference Result 299 states and 388 transitions. [2021-11-16 20:59:12,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 20:59:12,425 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 93 [2021-11-16 20:59:12,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:59:12,426 INFO L225 Difference]: With dead ends: 299 [2021-11-16 20:59:12,426 INFO L226 Difference]: Without dead ends: 177 [2021-11-16 20:59:12,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-16 20:59:12,427 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 6 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:59:12,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 316 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 20:59:12,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-11-16 20:59:12,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 174. [2021-11-16 20:59:12,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 121 states have (on average 1.0909090909090908) internal successors, (132), 125 states have internal predecessors, (132), 35 states have call successors, (35), 16 states have call predecessors, (35), 17 states have return successors, (46), 32 states have call predecessors, (46), 33 states have call successors, (46) [2021-11-16 20:59:12,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 213 transitions. [2021-11-16 20:59:12,434 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 213 transitions. Word has length 93 [2021-11-16 20:59:12,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:59:12,435 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 213 transitions. [2021-11-16 20:59:12,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-16 20:59:12,435 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 213 transitions. [2021-11-16 20:59:12,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-16 20:59:12,436 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:59:12,436 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:59:12,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-16 20:59:12,651 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,SelfDestructingSolverStorable13 [2021-11-16 20:59:12,652 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:59:12,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:59:12,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1747338265, now seen corresponding path program 1 times [2021-11-16 20:59:12,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:59:12,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34941797] [2021-11-16 20:59:12,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:59:12,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:59:12,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:12,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:59:12,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:12,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:59:12,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:12,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 20:59:12,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:12,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-16 20:59:12,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:12,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:59:12,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:12,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-16 20:59:12,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:12,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-16 20:59:12,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:12,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-16 20:59:12,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:12,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-16 20:59:12,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:12,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-16 20:59:12,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:12,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-16 20:59:12,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:12,899 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-16 20:59:12,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:59:12,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34941797] [2021-11-16 20:59:12,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34941797] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:59:12,900 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:59:12,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-16 20:59:12,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435766040] [2021-11-16 20:59:12,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:59:12,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-16 20:59:12,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:59:12,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-16 20:59:12,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-16 20:59:12,901 INFO L87 Difference]: Start difference. First operand 174 states and 213 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-16 20:59:14,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:59:14,084 INFO L93 Difference]: Finished difference Result 228 states and 286 transitions. [2021-11-16 20:59:14,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-16 20:59:14,084 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 100 [2021-11-16 20:59:14,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:59:14,085 INFO L225 Difference]: With dead ends: 228 [2021-11-16 20:59:14,086 INFO L226 Difference]: Without dead ends: 181 [2021-11-16 20:59:14,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-16 20:59:14,086 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 38 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-16 20:59:14,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 373 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-16 20:59:14,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-16 20:59:14,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 179. [2021-11-16 20:59:14,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 122 states have (on average 1.0901639344262295) internal successors, (133), 127 states have internal predecessors, (133), 39 states have call successors, (39), 16 states have call predecessors, (39), 17 states have return successors, (52), 35 states have call predecessors, (52), 37 states have call successors, (52) [2021-11-16 20:59:14,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 224 transitions. [2021-11-16 20:59:14,093 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 224 transitions. Word has length 100 [2021-11-16 20:59:14,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:59:14,093 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 224 transitions. [2021-11-16 20:59:14,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-16 20:59:14,093 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 224 transitions. [2021-11-16 20:59:14,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-16 20:59:14,094 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:59:14,094 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:59:14,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-16 20:59:14,094 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:59:14,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:59:14,094 INFO L85 PathProgramCache]: Analyzing trace with hash -250057666, now seen corresponding path program 1 times [2021-11-16 20:59:14,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:59:14,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475868466] [2021-11-16 20:59:14,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:59:14,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:59:14,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:14,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:59:14,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:14,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:59:14,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:14,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 20:59:14,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:14,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-16 20:59:14,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:14,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:59:14,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:14,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-16 20:59:14,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:14,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-16 20:59:14,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:14,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-16 20:59:14,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:14,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-16 20:59:14,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:14,380 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-16 20:59:14,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:59:14,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475868466] [2021-11-16 20:59:14,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475868466] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:59:14,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273101325] [2021-11-16 20:59:14,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:59:14,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:59:14,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:59:14,382 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:59:14,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-16 20:59:14,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:14,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 2562 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-16 20:59:14,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:59:14,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-16 20:59:14,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-16 20:59:14,999 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 29 treesize of output 21 [2021-11-16 20:59:15,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-11-16 20:59:15,108 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-16 20:59:15,108 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:59:15,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273101325] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:59:15,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:59:15,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2021-11-16 20:59:15,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530118704] [2021-11-16 20:59:15,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:59:15,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-16 20:59:15,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:59:15,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-16 20:59:15,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-11-16 20:59:15,109 INFO L87 Difference]: Start difference. First operand 179 states and 224 transitions. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-16 20:59:15,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:59:15,195 INFO L93 Difference]: Finished difference Result 331 states and 420 transitions. [2021-11-16 20:59:15,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-16 20:59:15,196 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 92 [2021-11-16 20:59:15,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:59:15,197 INFO L225 Difference]: With dead ends: 331 [2021-11-16 20:59:15,197 INFO L226 Difference]: Without dead ends: 208 [2021-11-16 20:59:15,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 102 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-11-16 20:59:15,198 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 35 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:59:15,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 534 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 49 Invalid, 0 Unknown, 22 Unchecked, 0.0s Time] [2021-11-16 20:59:15,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-11-16 20:59:15,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 194. [2021-11-16 20:59:15,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 133 states have (on average 1.0827067669172932) internal successors, (144), 139 states have internal predecessors, (144), 41 states have call successors, (41), 18 states have call predecessors, (41), 19 states have return successors, (54), 36 states have call predecessors, (54), 39 states have call successors, (54) [2021-11-16 20:59:15,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 239 transitions. [2021-11-16 20:59:15,206 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 239 transitions. Word has length 92 [2021-11-16 20:59:15,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:59:15,206 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 239 transitions. [2021-11-16 20:59:15,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-16 20:59:15,206 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 239 transitions. [2021-11-16 20:59:15,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-16 20:59:15,207 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:59:15,207 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:59:15,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-16 20:59:15,427 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,SelfDestructingSolverStorable15 [2021-11-16 20:59:15,427 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:59:15,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:59:15,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1187805753, now seen corresponding path program 1 times [2021-11-16 20:59:15,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:59:15,428 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157956620] [2021-11-16 20:59:15,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:59:15,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:59:15,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:15,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:59:15,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:15,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:59:15,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:15,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 20:59:15,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:15,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-16 20:59:15,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:15,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 20:59:15,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:15,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:59:15,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:15,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:59:15,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:15,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 20:59:15,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:15,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-16 20:59:15,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:15,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 20:59:15,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:15,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:59:15,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:15,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-16 20:59:15,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:15,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-16 20:59:15,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:15,631 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-16 20:59:15,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:59:15,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157956620] [2021-11-16 20:59:15,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157956620] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:59:15,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:59:15,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-16 20:59:15,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456640050] [2021-11-16 20:59:15,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:59:15,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-16 20:59:15,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:59:15,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-16 20:59:15,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-16 20:59:15,633 INFO L87 Difference]: Start difference. First operand 194 states and 239 transitions. Second operand has 9 states, 8 states have (on average 5.125) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-16 20:59:16,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:59:16,772 INFO L93 Difference]: Finished difference Result 202 states and 247 transitions. [2021-11-16 20:59:16,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-16 20:59:16,773 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.125) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 100 [2021-11-16 20:59:16,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:59:16,774 INFO L225 Difference]: With dead ends: 202 [2021-11-16 20:59:16,774 INFO L226 Difference]: Without dead ends: 200 [2021-11-16 20:59:16,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-11-16 20:59:16,774 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 51 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-16 20:59:16,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 523 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-16 20:59:16,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-11-16 20:59:16,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2021-11-16 20:59:16,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 136 states have (on average 1.0808823529411764) internal successors, (147), 142 states have internal predecessors, (147), 42 states have call successors, (42), 19 states have call predecessors, (42), 20 states have return successors, (55), 37 states have call predecessors, (55), 40 states have call successors, (55) [2021-11-16 20:59:16,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 244 transitions. [2021-11-16 20:59:16,782 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 244 transitions. Word has length 100 [2021-11-16 20:59:16,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:59:16,783 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 244 transitions. [2021-11-16 20:59:16,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.125) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-16 20:59:16,783 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 244 transitions. [2021-11-16 20:59:16,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-16 20:59:16,784 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:59:16,784 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:59:16,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-16 20:59:16,784 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:59:16,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:59:16,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1946355713, now seen corresponding path program 1 times [2021-11-16 20:59:16,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:59:16,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593325309] [2021-11-16 20:59:16,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:59:16,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:59:16,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:16,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:59:16,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:16,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:59:16,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:16,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 20:59:16,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:16,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-16 20:59:16,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:16,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 20:59:16,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:17,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:59:17,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:17,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:59:17,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:17,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 20:59:17,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:17,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-16 20:59:17,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:17,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 20:59:17,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:17,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:59:17,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:17,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-16 20:59:17,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:17,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-16 20:59:17,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:17,237 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 22 proven. 23 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-16 20:59:17,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:59:17,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593325309] [2021-11-16 20:59:17,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593325309] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:59:17,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984074973] [2021-11-16 20:59:17,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:59:17,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:59:17,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:59:17,239 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:59:17,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-16 20:59:17,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:17,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 2582 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-16 20:59:17,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:59:17,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-16 20:59:18,185 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 32 proven. 30 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-16 20:59:18,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:59:18,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984074973] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:59:18,426 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 20:59:18,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 27 [2021-11-16 20:59:18,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756751407] [2021-11-16 20:59:18,427 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 20:59:18,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-16 20:59:18,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:59:18,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-16 20:59:18,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-11-16 20:59:18,428 INFO L87 Difference]: Start difference. First operand 199 states and 244 transitions. Second operand has 27 states, 27 states have (on average 3.185185185185185) internal successors, (86), 26 states have internal predecessors, (86), 12 states have call successors, (27), 5 states have call predecessors, (27), 7 states have return successors, (26), 11 states have call predecessors, (26), 11 states have call successors, (26) [2021-11-16 20:59:22,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:59:22,263 INFO L93 Difference]: Finished difference Result 343 states and 450 transitions. [2021-11-16 20:59:22,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-16 20:59:22,264 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.185185185185185) internal successors, (86), 26 states have internal predecessors, (86), 12 states have call successors, (27), 5 states have call predecessors, (27), 7 states have return successors, (26), 11 states have call predecessors, (26), 11 states have call successors, (26) Word has length 104 [2021-11-16 20:59:22,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:59:22,265 INFO L225 Difference]: With dead ends: 343 [2021-11-16 20:59:22,265 INFO L226 Difference]: Without dead ends: 253 [2021-11-16 20:59:22,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 138 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=341, Invalid=2521, Unknown=0, NotChecked=0, Total=2862 [2021-11-16 20:59:22,267 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 244 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 1388 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 1813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 1388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 230 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-16 20:59:22,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 438 Invalid, 1813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 1388 Invalid, 0 Unknown, 230 Unchecked, 3.2s Time] [2021-11-16 20:59:22,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-11-16 20:59:22,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 217. [2021-11-16 20:59:22,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 139 states have (on average 1.0719424460431655) internal successors, (149), 144 states have internal predecessors, (149), 57 states have call successors, (57), 19 states have call predecessors, (57), 20 states have return successors, (75), 53 states have call predecessors, (75), 55 states have call successors, (75) [2021-11-16 20:59:22,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 281 transitions. [2021-11-16 20:59:22,280 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 281 transitions. Word has length 104 [2021-11-16 20:59:22,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:59:22,281 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 281 transitions. [2021-11-16 20:59:22,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.185185185185185) internal successors, (86), 26 states have internal predecessors, (86), 12 states have call successors, (27), 5 states have call predecessors, (27), 7 states have return successors, (26), 11 states have call predecessors, (26), 11 states have call successors, (26) [2021-11-16 20:59:22,281 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 281 transitions. [2021-11-16 20:59:22,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-16 20:59:22,282 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:59:22,282 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:59:22,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-16 20:59:22,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-16 20:59:22,487 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:59:22,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:59:22,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1261447352, now seen corresponding path program 1 times [2021-11-16 20:59:22,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:59:22,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609398747] [2021-11-16 20:59:22,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:59:22,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:59:22,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:23,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:59:23,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:23,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:59:23,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:23,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-16 20:59:23,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:23,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:59:23,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:23,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 20:59:23,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:23,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-16 20:59:23,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:23,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 20:59:23,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:23,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-16 20:59:23,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:23,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-16 20:59:23,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:23,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-16 20:59:23,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:23,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-16 20:59:23,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:23,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-11-16 20:59:23,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:23,367 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-16 20:59:23,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:59:23,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609398747] [2021-11-16 20:59:23,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609398747] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:59:23,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034177313] [2021-11-16 20:59:23,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:59:23,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:59:23,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:59:23,368 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:59:23,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-16 20:59:23,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:59:23,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 2623 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-16 20:59:23,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:59:23,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-16 20:59:23,877 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-16 20:59:23,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-16 20:59:23,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-16 20:59:24,383 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-11-16 20:59:24,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 20 treesize of output 22 [2021-11-16 20:59:24,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2021-11-16 20:59:34,357 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-16 20:59:34,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 24 [2021-11-16 21:00:27,693 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 30 proven. 52 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-16 21:00:27,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:00:28,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034177313] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:00:28,959 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 21:00:28,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 37 [2021-11-16 21:00:28,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171409907] [2021-11-16 21:00:28,959 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 21:00:28,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-16 21:00:28,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:00:28,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-16 21:00:28,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1882, Unknown=4, NotChecked=0, Total=2070 [2021-11-16 21:00:28,962 INFO L87 Difference]: Start difference. First operand 217 states and 281 transitions. Second operand has 37 states, 35 states have (on average 3.6857142857142855) internal successors, (129), 31 states have internal predecessors, (129), 13 states have call successors, (26), 9 states have call predecessors, (26), 8 states have return successors, (23), 12 states have call predecessors, (23), 10 states have call successors, (23) [2021-11-16 21:00:30,991 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:00:34,476 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:00:37,105 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:00:39,495 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:00:40,613 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:00:42,123 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:00:43,222 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:00:47,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:00:47,237 INFO L93 Difference]: Finished difference Result 404 states and 507 transitions. [2021-11-16 21:00:47,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-16 21:00:47,237 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 3.6857142857142855) internal successors, (129), 31 states have internal predecessors, (129), 13 states have call successors, (26), 9 states have call predecessors, (26), 8 states have return successors, (23), 12 states have call predecessors, (23), 10 states have call successors, (23) Word has length 109 [2021-11-16 21:00:47,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:00:47,241 INFO L225 Difference]: With dead ends: 404 [2021-11-16 21:00:47,241 INFO L226 Difference]: Without dead ends: 324 [2021-11-16 21:00:47,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 158 SyntacticMatches, 17 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1889 ImplicationChecksByTransitivity, 65.6s TimeCoverageRelationStatistics Valid=446, Invalid=4952, Unknown=4, NotChecked=0, Total=5402 [2021-11-16 21:00:47,264 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 182 mSDsluCounter, 1566 mSDsCounter, 0 mSdLazyCounter, 1673 mSolverCounterSat, 95 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 1708 SdHoareTripleChecker+Invalid, 2526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1673 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 755 IncrementalHoareTripleChecker+Unchecked, 17.0s IncrementalHoareTripleChecker+Time [2021-11-16 21:00:47,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 1708 Invalid, 2526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1673 Invalid, 3 Unknown, 755 Unchecked, 17.0s Time] [2021-11-16 21:00:47,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-11-16 21:00:47,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 291. [2021-11-16 21:00:47,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 196 states have (on average 1.0765306122448979) internal successors, (211), 202 states have internal predecessors, (211), 66 states have call successors, (66), 26 states have call predecessors, (66), 28 states have return successors, (84), 62 states have call predecessors, (84), 64 states have call successors, (84) [2021-11-16 21:00:47,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 361 transitions. [2021-11-16 21:00:47,279 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 361 transitions. Word has length 109 [2021-11-16 21:00:47,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:00:47,280 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 361 transitions. [2021-11-16 21:00:47,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 3.6857142857142855) internal successors, (129), 31 states have internal predecessors, (129), 13 states have call successors, (26), 9 states have call predecessors, (26), 8 states have return successors, (23), 12 states have call predecessors, (23), 10 states have call successors, (23) [2021-11-16 21:00:47,280 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 361 transitions. [2021-11-16 21:00:47,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-16 21:00:47,281 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:00:47,281 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:00:47,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-16 21:00:47,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:00:47,502 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:00:47,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:00:47,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1003281914, now seen corresponding path program 1 times [2021-11-16 21:00:47,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:00:47,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738317900] [2021-11-16 21:00:47,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:00:47,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:00:47,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:47,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 21:00:47,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:47,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 21:00:47,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:47,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-16 21:00:47,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:47,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:00:47,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:47,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 21:00:47,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:47,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-16 21:00:47,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:47,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 21:00:47,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:47,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-16 21:00:47,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:47,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-16 21:00:47,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:47,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-16 21:00:47,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:47,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-16 21:00:47,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:47,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-11-16 21:00:47,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:47,682 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-16 21:00:47,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:00:47,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738317900] [2021-11-16 21:00:47,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738317900] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:00:47,683 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:00:47,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-16 21:00:47,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380398783] [2021-11-16 21:00:47,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:00:47,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-16 21:00:47,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:00:47,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-16 21:00:47,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-16 21:00:47,685 INFO L87 Difference]: Start difference. First operand 291 states and 361 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-16 21:00:49,857 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:00:50,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:00:50,047 INFO L93 Difference]: Finished difference Result 367 states and 465 transitions. [2021-11-16 21:00:50,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 21:00:50,048 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) Word has length 109 [2021-11-16 21:00:50,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:00:50,049 INFO L225 Difference]: With dead ends: 367 [2021-11-16 21:00:50,049 INFO L226 Difference]: Without dead ends: 281 [2021-11-16 21:00:50,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-16 21:00:50,050 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 43 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 23 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-16 21:00:50,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 250 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 107 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-16 21:00:50,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-11-16 21:00:50,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2021-11-16 21:00:50,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 188 states have (on average 1.0691489361702127) internal successors, (201), 193 states have internal predecessors, (201), 65 states have call successors, (65), 26 states have call predecessors, (65), 27 states have return successors, (82), 61 states have call predecessors, (82), 63 states have call successors, (82) [2021-11-16 21:00:50,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 348 transitions. [2021-11-16 21:00:50,063 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 348 transitions. Word has length 109 [2021-11-16 21:00:50,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:00:50,063 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 348 transitions. [2021-11-16 21:00:50,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-16 21:00:50,064 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 348 transitions. [2021-11-16 21:00:50,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-16 21:00:50,065 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:00:50,066 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:00:50,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-16 21:00:50,066 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:00:50,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:00:50,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1112110986, now seen corresponding path program 1 times [2021-11-16 21:00:50,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:00:50,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511394385] [2021-11-16 21:00:50,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:00:50,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:00:50,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:50,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 21:00:50,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:50,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 21:00:50,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:50,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-16 21:00:50,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:50,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:00:50,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:50,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 21:00:50,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:50,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-16 21:00:50,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:50,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 21:00:50,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:50,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-16 21:00:50,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:50,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-16 21:00:50,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:50,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-16 21:00:50,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:50,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-16 21:00:50,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:50,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-16 21:00:50,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:50,792 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-16 21:00:50,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:00:50,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511394385] [2021-11-16 21:00:50,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511394385] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:00:50,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601654755] [2021-11-16 21:00:50,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:00:50,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:00:50,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:00:50,794 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:00:50,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-16 21:00:51,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:51,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 2635 conjuncts, 83 conjunts are in the unsatisfiable core [2021-11-16 21:00:51,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:00:51,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-16 21:00:51,322 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-16 21:00:51,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-16 21:00:51,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-16 21:00:51,817 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-11-16 21:00:51,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 20 treesize of output 22 [2021-11-16 21:00:51,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2021-11-16 21:00:59,231 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-16 21:00:59,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 24 [2021-11-16 21:01:45,862 INFO L354 Elim1Store]: treesize reduction 25, result has 41.9 percent of original size [2021-11-16 21:01:45,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 50 [2021-11-16 21:01:45,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:01:45,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-16 21:01:45,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 47 [2021-11-16 21:01:46,852 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 31 proven. 54 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-16 21:01:46,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:01:47,273 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-16 21:01:47,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-11-16 21:01:49,339 WARN L838 $PredicateComparison]: unable to prove that (forall ((|aws_byte_cursor_left_trim_pred_~#trimmed~1.base| Int) (v_DerPreprocessor_3 Int)) (or (not (= (select (select (store |c_#memory_$Pointer$.base| |aws_byte_cursor_left_trim_pred_~#trimmed~1.base| (let ((.cse0 (store (select |c_#memory_$Pointer$.base| |aws_byte_cursor_left_trim_pred_~#trimmed~1.base|) |c_aws_byte_cursor_left_trim_pred_~#trimmed~1.offset| v_DerPreprocessor_3)) (.cse1 (+ |c_aws_byte_cursor_left_trim_pred_~#trimmed~1.offset| 8))) (store .cse0 .cse1 (select .cse0 .cse1)))) c_aws_byte_cursor_left_trim_pred_~source.base) (+ c_aws_byte_cursor_left_trim_pred_~source.offset 8)) 0)) (and (= c_aws_byte_cursor_left_trim_pred_~source.base |aws_byte_cursor_left_trim_pred_~#trimmed~1.base|) (= c_aws_byte_cursor_left_trim_pred_~source.offset |c_aws_byte_cursor_left_trim_pred_~#trimmed~1.offset|)))) is different from false [2021-11-16 21:01:49,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601654755] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:01:49,387 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 21:01:49,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 27] total 43 [2021-11-16 21:01:49,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433626510] [2021-11-16 21:01:49,387 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 21:01:49,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-16 21:01:49,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:01:49,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-16 21:01:49,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=2422, Unknown=3, NotChecked=100, Total=2756 [2021-11-16 21:01:49,389 INFO L87 Difference]: Start difference. First operand 281 states and 348 transitions. Second operand has 43 states, 41 states have (on average 3.1219512195121952) internal successors, (128), 37 states have internal predecessors, (128), 16 states have call successors, (26), 10 states have call predecessors, (26), 8 states have return successors, (23), 14 states have call predecessors, (23), 13 states have call successors, (23) [2021-11-16 21:01:52,578 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:01:54,643 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:02:04,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:02:04,440 INFO L93 Difference]: Finished difference Result 398 states and 480 transitions. [2021-11-16 21:02:04,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-16 21:02:04,440 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 3.1219512195121952) internal successors, (128), 37 states have internal predecessors, (128), 16 states have call successors, (26), 10 states have call predecessors, (26), 8 states have return successors, (23), 14 states have call predecessors, (23), 13 states have call successors, (23) Word has length 112 [2021-11-16 21:02:04,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:02:04,442 INFO L225 Difference]: With dead ends: 398 [2021-11-16 21:02:04,442 INFO L226 Difference]: Without dead ends: 332 [2021-11-16 21:02:04,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 119 SyntacticMatches, 16 SemanticMatches, 87 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2398 ImplicationChecksByTransitivity, 64.5s TimeCoverageRelationStatistics Valid=616, Invalid=7041, Unknown=3, NotChecked=172, Total=7832 [2021-11-16 21:02:04,444 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 144 mSDsluCounter, 829 mSDsCounter, 0 mSdLazyCounter, 1208 mSolverCounterSat, 115 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 940 SdHoareTripleChecker+Invalid, 2144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1208 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 820 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2021-11-16 21:02:04,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 940 Invalid, 2144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1208 Invalid, 1 Unknown, 820 Unchecked, 7.6s Time] [2021-11-16 21:02:04,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-11-16 21:02:04,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 322. [2021-11-16 21:02:04,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 223 states have (on average 1.0762331838565022) internal successors, (240), 230 states have internal predecessors, (240), 66 states have call successors, (66), 30 states have call predecessors, (66), 32 states have return successors, (81), 61 states have call predecessors, (81), 64 states have call successors, (81) [2021-11-16 21:02:04,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 387 transitions. [2021-11-16 21:02:04,460 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 387 transitions. Word has length 112 [2021-11-16 21:02:04,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:02:04,460 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 387 transitions. [2021-11-16 21:02:04,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 3.1219512195121952) internal successors, (128), 37 states have internal predecessors, (128), 16 states have call successors, (26), 10 states have call predecessors, (26), 8 states have return successors, (23), 14 states have call predecessors, (23), 13 states have call successors, (23) [2021-11-16 21:02:04,461 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 387 transitions. [2021-11-16 21:02:04,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-16 21:02:04,462 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:02:04,462 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:02:04,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-16 21:02:04,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-16 21:02:04,684 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:02:04,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:02:04,684 INFO L85 PathProgramCache]: Analyzing trace with hash 634770534, now seen corresponding path program 1 times [2021-11-16 21:02:04,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:02:04,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994407453] [2021-11-16 21:02:04,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:02:04,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:02:04,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:04,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 21:02:04,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:04,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 21:02:04,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:04,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:02:04,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:04,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-16 21:02:04,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:04,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 21:02:04,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:04,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:02:04,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:04,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 21:02:04,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:04,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 21:02:04,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:04,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-16 21:02:04,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:04,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 21:02:04,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:04,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 21:02:04,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:04,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-16 21:02:04,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:04,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-16 21:02:04,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:04,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-16 21:02:04,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:04,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-11-16 21:02:04,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:04,909 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-16 21:02:04,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:02:04,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994407453] [2021-11-16 21:02:04,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994407453] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:02:04,910 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:02:04,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-16 21:02:04,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300541727] [2021-11-16 21:02:04,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:02:04,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-16 21:02:04,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:02:04,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-16 21:02:04,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-16 21:02:04,912 INFO L87 Difference]: Start difference. First operand 322 states and 387 transitions. Second operand has 9 states, 8 states have (on average 5.375) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-16 21:02:05,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:02:05,423 INFO L93 Difference]: Finished difference Result 330 states and 395 transitions. [2021-11-16 21:02:05,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-16 21:02:05,425 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.375) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 115 [2021-11-16 21:02:05,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:02:05,427 INFO L225 Difference]: With dead ends: 330 [2021-11-16 21:02:05,427 INFO L226 Difference]: Without dead ends: 328 [2021-11-16 21:02:05,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-11-16 21:02:05,428 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 49 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-16 21:02:05,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 522 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-16 21:02:05,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-11-16 21:02:05,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 327. [2021-11-16 21:02:05,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 226 states have (on average 1.075221238938053) internal successors, (243), 233 states have internal predecessors, (243), 67 states have call successors, (67), 31 states have call predecessors, (67), 33 states have return successors, (82), 62 states have call predecessors, (82), 65 states have call successors, (82) [2021-11-16 21:02:05,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 392 transitions. [2021-11-16 21:02:05,448 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 392 transitions. Word has length 115 [2021-11-16 21:02:05,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:02:05,469 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 392 transitions. [2021-11-16 21:02:05,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.375) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-16 21:02:05,473 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 392 transitions. [2021-11-16 21:02:05,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-16 21:02:05,476 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:02:05,476 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:02:05,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-16 21:02:05,476 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:02:05,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:02:05,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1305766989, now seen corresponding path program 1 times [2021-11-16 21:02:05,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:02:05,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053153518] [2021-11-16 21:02:05,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:02:05,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:02:05,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:05,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 21:02:05,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:05,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 21:02:05,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:05,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:02:05,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:05,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-16 21:02:05,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:05,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 21:02:05,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:05,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:02:05,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:05,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 21:02:05,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:05,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 21:02:05,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:05,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-16 21:02:05,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:05,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 21:02:05,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:05,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 21:02:05,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:05,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-16 21:02:05,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:05,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-16 21:02:05,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:05,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-16 21:02:05,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:05,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-11-16 21:02:05,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:05,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-11-16 21:02:05,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:05,924 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-16 21:02:05,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:02:05,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053153518] [2021-11-16 21:02:05,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053153518] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:02:05,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:02:05,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-16 21:02:05,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753507780] [2021-11-16 21:02:05,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:02:05,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-16 21:02:05,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:02:05,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-16 21:02:05,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-16 21:02:05,926 INFO L87 Difference]: Start difference. First operand 327 states and 392 transitions. Second operand has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 5 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-16 21:02:08,946 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:02:10,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:02:10,561 INFO L93 Difference]: Finished difference Result 348 states and 415 transitions. [2021-11-16 21:02:10,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-16 21:02:10,561 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 5 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 125 [2021-11-16 21:02:10,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:02:10,562 INFO L225 Difference]: With dead ends: 348 [2021-11-16 21:02:10,563 INFO L226 Difference]: Without dead ends: 252 [2021-11-16 21:02:10,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-11-16 21:02:10,563 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 46 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-16 21:02:10,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 335 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2021-11-16 21:02:10,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-11-16 21:02:10,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 235. [2021-11-16 21:02:10,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 166 states have (on average 1.0903614457831325) internal successors, (181), 170 states have internal predecessors, (181), 44 states have call successors, (44), 23 states have call predecessors, (44), 24 states have return successors, (57), 41 states have call predecessors, (57), 42 states have call successors, (57) [2021-11-16 21:02:10,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 282 transitions. [2021-11-16 21:02:10,573 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 282 transitions. Word has length 125 [2021-11-16 21:02:10,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:02:10,573 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 282 transitions. [2021-11-16 21:02:10,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 5 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-16 21:02:10,573 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 282 transitions. [2021-11-16 21:02:10,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-16 21:02:10,574 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:02:10,574 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:02:10,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-16 21:02:10,574 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:02:10,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:02:10,574 INFO L85 PathProgramCache]: Analyzing trace with hash 868973393, now seen corresponding path program 1 times [2021-11-16 21:02:10,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:02:10,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268344316] [2021-11-16 21:02:10,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:02:10,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:02:11,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:11,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 21:02:11,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:11,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 21:02:11,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:11,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-16 21:02:11,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:11,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:02:11,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:11,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 21:02:11,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:11,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-16 21:02:11,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:11,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 21:02:11,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:11,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-16 21:02:11,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:11,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-16 21:02:11,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:11,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-16 21:02:11,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:11,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-16 21:02:11,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:11,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-11-16 21:02:11,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:11,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-11-16 21:02:11,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:11,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-11-16 21:02:11,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:11,463 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-16 21:02:11,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:02:11,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268344316] [2021-11-16 21:02:11,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268344316] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:02:11,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:02:11,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-16 21:02:11,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432391371] [2021-11-16 21:02:11,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:02:11,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-16 21:02:11,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:02:11,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-16 21:02:11,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-11-16 21:02:11,464 INFO L87 Difference]: Start difference. First operand 235 states and 282 transitions. Second operand has 21 states, 20 states have (on average 3.0) internal successors, (60), 18 states have internal predecessors, (60), 10 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (14), 10 states have call predecessors, (14), 8 states have call successors, (14) [2021-11-16 21:02:14,006 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:02:15,899 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:02:17,598 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:02:19,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:02:19,711 INFO L93 Difference]: Finished difference Result 299 states and 356 transitions. [2021-11-16 21:02:19,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-16 21:02:19,711 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.0) internal successors, (60), 18 states have internal predecessors, (60), 10 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (14), 10 states have call predecessors, (14), 8 states have call successors, (14) Word has length 129 [2021-11-16 21:02:19,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:02:19,712 INFO L225 Difference]: With dead ends: 299 [2021-11-16 21:02:19,712 INFO L226 Difference]: Without dead ends: 235 [2021-11-16 21:02:19,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=919, Unknown=0, NotChecked=0, Total=1056 [2021-11-16 21:02:19,714 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 136 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 1385 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 1482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2021-11-16 21:02:19,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 359 Invalid, 1482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1385 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2021-11-16 21:02:19,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-11-16 21:02:19,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2021-11-16 21:02:19,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 166 states have (on average 1.0903614457831325) internal successors, (181), 170 states have internal predecessors, (181), 44 states have call successors, (44), 23 states have call predecessors, (44), 24 states have return successors, (53), 41 states have call predecessors, (53), 42 states have call successors, (53) [2021-11-16 21:02:19,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 278 transitions. [2021-11-16 21:02:19,729 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 278 transitions. Word has length 129 [2021-11-16 21:02:19,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:02:19,729 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 278 transitions. [2021-11-16 21:02:19,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.0) internal successors, (60), 18 states have internal predecessors, (60), 10 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (14), 10 states have call predecessors, (14), 8 states have call successors, (14) [2021-11-16 21:02:19,730 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 278 transitions. [2021-11-16 21:02:19,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-16 21:02:19,732 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:02:19,732 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:02:19,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-16 21:02:19,733 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:02:19,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:02:19,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1381910248, now seen corresponding path program 1 times [2021-11-16 21:02:19,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:02:19,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466652207] [2021-11-16 21:02:19,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:02:19,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:02:19,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:19,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 21:02:19,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:19,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 21:02:19,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:19,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-16 21:02:19,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:19,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:02:19,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:19,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 21:02:19,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:19,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-16 21:02:19,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:19,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 21:02:19,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:19,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-16 21:02:19,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:19,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-16 21:02:19,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:19,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-16 21:02:19,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:19,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-16 21:02:19,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:19,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-11-16 21:02:19,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:19,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-11-16 21:02:19,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:19,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-11-16 21:02:19,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:20,023 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-16 21:02:20,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:02:20,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466652207] [2021-11-16 21:02:20,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466652207] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:02:20,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:02:20,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-16 21:02:20,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728503649] [2021-11-16 21:02:20,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:02:20,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-16 21:02:20,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:02:20,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-16 21:02:20,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-11-16 21:02:20,025 INFO L87 Difference]: Start difference. First operand 235 states and 278 transitions. Second operand has 14 states, 13 states have (on average 4.538461538461538) internal successors, (59), 11 states have internal predecessors, (59), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-16 21:02:21,644 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:02:22,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:02:22,871 INFO L93 Difference]: Finished difference Result 241 states and 283 transitions. [2021-11-16 21:02:22,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-16 21:02:22,872 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.538461538461538) internal successors, (59), 11 states have internal predecessors, (59), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) Word has length 131 [2021-11-16 21:02:22,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:02:22,873 INFO L225 Difference]: With dead ends: 241 [2021-11-16 21:02:22,873 INFO L226 Difference]: Without dead ends: 239 [2021-11-16 21:02:22,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2021-11-16 21:02:22,874 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 67 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-16 21:02:22,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 858 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-16 21:02:22,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-11-16 21:02:22,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 233. [2021-11-16 21:02:22,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 166 states have (on average 1.0903614457831325) internal successors, (181), 170 states have internal predecessors, (181), 42 states have call successors, (42), 23 states have call predecessors, (42), 24 states have return successors, (51), 39 states have call predecessors, (51), 40 states have call successors, (51) [2021-11-16 21:02:22,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 274 transitions. [2021-11-16 21:02:22,884 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 274 transitions. Word has length 131 [2021-11-16 21:02:22,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:02:22,884 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 274 transitions. [2021-11-16 21:02:22,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.538461538461538) internal successors, (59), 11 states have internal predecessors, (59), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-16 21:02:22,884 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 274 transitions. [2021-11-16 21:02:22,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-16 21:02:22,885 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:02:22,885 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:02:22,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-16 21:02:22,886 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:02:22,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:02:22,886 INFO L85 PathProgramCache]: Analyzing trace with hash 716580214, now seen corresponding path program 1 times [2021-11-16 21:02:22,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:02:22,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240849212] [2021-11-16 21:02:22,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:02:22,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:02:22,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:23,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 21:02:23,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:23,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 21:02:23,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:23,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-16 21:02:23,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:23,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:02:23,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:23,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 21:02:23,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:23,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-16 21:02:23,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:23,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 21:02:23,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:23,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-16 21:02:23,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:23,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:02:23,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:23,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 21:02:23,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:23,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 21:02:23,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:23,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-16 21:02:23,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:23,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 21:02:23,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:23,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 21:02:23,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:23,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-16 21:02:23,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:23,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-11-16 21:02:23,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:23,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-16 21:02:23,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:23,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-11-16 21:02:23,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:23,316 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-16 21:02:23,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:02:23,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240849212] [2021-11-16 21:02:23,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240849212] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:02:23,316 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:02:23,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-11-16 21:02:23,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822418656] [2021-11-16 21:02:23,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:02:23,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-16 21:02:23,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:02:23,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-16 21:02:23,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-11-16 21:02:23,318 INFO L87 Difference]: Start difference. First operand 233 states and 274 transitions. Second operand has 15 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 7 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 6 states have call successors, (18) [2021-11-16 21:02:24,586 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:02:26,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:02:26,544 INFO L93 Difference]: Finished difference Result 267 states and 319 transitions. [2021-11-16 21:02:26,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-16 21:02:26,545 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 7 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 6 states have call successors, (18) Word has length 143 [2021-11-16 21:02:26,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:02:26,546 INFO L225 Difference]: With dead ends: 267 [2021-11-16 21:02:26,546 INFO L226 Difference]: Without dead ends: 254 [2021-11-16 21:02:26,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-11-16 21:02:26,547 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 104 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-16 21:02:26,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 348 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-16 21:02:26,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-11-16 21:02:26,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 246. [2021-11-16 21:02:26,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 172 states have (on average 1.0872093023255813) internal successors, (187), 176 states have internal predecessors, (187), 48 states have call successors, (48), 23 states have call predecessors, (48), 25 states have return successors, (58), 46 states have call predecessors, (58), 46 states have call successors, (58) [2021-11-16 21:02:26,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 293 transitions. [2021-11-16 21:02:26,559 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 293 transitions. Word has length 143 [2021-11-16 21:02:26,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:02:26,560 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 293 transitions. [2021-11-16 21:02:26,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 7 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 6 states have call successors, (18) [2021-11-16 21:02:26,560 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 293 transitions. [2021-11-16 21:02:26,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-16 21:02:26,561 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:02:26,561 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:02:26,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-16 21:02:26,561 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:02:26,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:02:26,562 INFO L85 PathProgramCache]: Analyzing trace with hash 59693077, now seen corresponding path program 1 times [2021-11-16 21:02:26,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:02:26,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733482778] [2021-11-16 21:02:26,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:02:26,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:02:26,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:26,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 21:02:26,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:26,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 21:02:26,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:26,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-16 21:02:26,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:26,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:02:26,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:26,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 21:02:26,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:26,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-16 21:02:26,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:26,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 21:02:26,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:26,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-16 21:02:26,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:26,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:02:26,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:26,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 21:02:26,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:26,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 21:02:26,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:26,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-16 21:02:26,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:26,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 21:02:26,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:26,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 21:02:26,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:26,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-16 21:02:26,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:26,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-11-16 21:02:26,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:26,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-16 21:02:26,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:26,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-11-16 21:02:26,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:26,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-11-16 21:02:26,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:26,931 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2021-11-16 21:02:26,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:02:26,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733482778] [2021-11-16 21:02:26,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733482778] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:02:26,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:02:26,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-16 21:02:26,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930183587] [2021-11-16 21:02:26,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:02:26,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-16 21:02:26,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:02:26,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-16 21:02:26,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-16 21:02:26,933 INFO L87 Difference]: Start difference. First operand 246 states and 293 transitions. Second operand has 12 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 7 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (19), 4 states have call predecessors, (19), 6 states have call successors, (19) [2021-11-16 21:02:28,088 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:02:30,115 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:02:32,173 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:02:33,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:02:33,050 INFO L93 Difference]: Finished difference Result 263 states and 312 transitions. [2021-11-16 21:02:33,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-16 21:02:33,051 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 7 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (19), 4 states have call predecessors, (19), 6 states have call successors, (19) Word has length 149 [2021-11-16 21:02:33,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:02:33,053 INFO L225 Difference]: With dead ends: 263 [2021-11-16 21:02:33,053 INFO L226 Difference]: Without dead ends: 222 [2021-11-16 21:02:33,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-11-16 21:02:33,054 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 75 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 68 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2021-11-16 21:02:33,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 339 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 591 Invalid, 2 Unknown, 0 Unchecked, 6.0s Time] [2021-11-16 21:02:33,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-11-16 21:02:33,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 218. [2021-11-16 21:02:33,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 155 states have (on average 1.0903225806451613) internal successors, (169), 160 states have internal predecessors, (169), 39 states have call successors, (39), 21 states have call predecessors, (39), 23 states have return successors, (47), 36 states have call predecessors, (47), 37 states have call successors, (47) [2021-11-16 21:02:33,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 255 transitions. [2021-11-16 21:02:33,066 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 255 transitions. Word has length 149 [2021-11-16 21:02:33,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:02:33,067 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 255 transitions. [2021-11-16 21:02:33,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 7 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (19), 4 states have call predecessors, (19), 6 states have call successors, (19) [2021-11-16 21:02:33,067 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 255 transitions. [2021-11-16 21:02:33,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-16 21:02:33,068 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:02:33,068 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:02:33,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-16 21:02:33,068 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:02:33,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:02:33,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1529409860, now seen corresponding path program 1 times [2021-11-16 21:02:33,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:02:33,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815986688] [2021-11-16 21:02:33,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:02:33,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:02:33,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:33,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 21:02:33,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:33,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 21:02:33,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:33,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-16 21:02:33,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:33,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:02:33,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:33,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 21:02:33,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:33,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-16 21:02:33,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:33,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 21:02:33,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:33,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-16 21:02:33,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:33,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:02:33,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:33,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 21:02:33,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:33,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-16 21:02:33,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:33,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-16 21:02:33,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:33,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-16 21:02:33,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:33,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-16 21:02:33,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:33,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-16 21:02:33,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:33,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-16 21:02:33,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:33,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-11-16 21:02:33,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:33,405 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-11-16 21:02:33,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:02:33,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815986688] [2021-11-16 21:02:33,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815986688] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:02:33,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:02:33,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-11-16 21:02:33,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532414181] [2021-11-16 21:02:33,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:02:33,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-16 21:02:33,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:02:33,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-16 21:02:33,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-11-16 21:02:33,406 INFO L87 Difference]: Start difference. First operand 218 states and 255 transitions. Second operand has 15 states, 14 states have (on average 4.642857142857143) internal successors, (65), 11 states have internal predecessors, (65), 2 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) [2021-11-16 21:02:35,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:02:35,597 INFO L93 Difference]: Finished difference Result 224 states and 260 transitions. [2021-11-16 21:02:35,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-16 21:02:35,597 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.642857142857143) internal successors, (65), 11 states have internal predecessors, (65), 2 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) Word has length 151 [2021-11-16 21:02:35,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:02:35,598 INFO L225 Difference]: With dead ends: 224 [2021-11-16 21:02:35,598 INFO L226 Difference]: Without dead ends: 222 [2021-11-16 21:02:35,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2021-11-16 21:02:35,599 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 106 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-16 21:02:35,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 752 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-16 21:02:35,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-11-16 21:02:35,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 217. [2021-11-16 21:02:35,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 155 states have (on average 1.0903225806451613) internal successors, (169), 160 states have internal predecessors, (169), 38 states have call successors, (38), 21 states have call predecessors, (38), 23 states have return successors, (46), 35 states have call predecessors, (46), 36 states have call successors, (46) [2021-11-16 21:02:35,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 253 transitions. [2021-11-16 21:02:35,609 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 253 transitions. Word has length 151 [2021-11-16 21:02:35,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:02:35,609 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 253 transitions. [2021-11-16 21:02:35,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.642857142857143) internal successors, (65), 11 states have internal predecessors, (65), 2 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) [2021-11-16 21:02:35,609 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 253 transitions. [2021-11-16 21:02:35,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-16 21:02:35,610 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:02:35,610 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:02:35,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-16 21:02:35,611 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:02:35,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:02:35,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1434041611, now seen corresponding path program 1 times [2021-11-16 21:02:35,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:02:35,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072683380] [2021-11-16 21:02:35,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:02:35,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:02:35,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:35,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 21:02:35,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:35,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 21:02:35,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:35,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-16 21:02:35,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:35,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:02:35,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:35,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 21:02:35,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:35,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-16 21:02:35,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:35,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 21:02:35,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:35,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-16 21:02:35,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:35,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:02:35,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:35,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 21:02:35,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:35,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-16 21:02:35,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:35,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-16 21:02:35,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:35,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-16 21:02:35,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:35,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 21:02:35,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:35,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-16 21:02:35,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:35,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-16 21:02:35,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:35,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-11-16 21:02:35,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:35,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-11-16 21:02:35,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:35,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-11-16 21:02:35,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:35,986 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-16 21:02:35,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:02:35,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072683380] [2021-11-16 21:02:35,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072683380] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:02:35,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899373275] [2021-11-16 21:02:35,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:02:35,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:02:35,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:02:36,004 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:02:36,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-16 21:02:36,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:36,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 2743 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-16 21:02:36,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:02:36,643 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-16 21:02:36,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 36 [2021-11-16 21:02:36,858 INFO L354 Elim1Store]: treesize reduction 212, result has 36.3 percent of original size [2021-11-16 21:02:36,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 14 case distinctions, treesize of input 102 treesize of output 194 [2021-11-16 21:02:38,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:02:38,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:02:38,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:02:38,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 32 [2021-11-16 21:02:38,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:02:38,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:02:38,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:02:38,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 39 [2021-11-16 21:02:38,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:02:38,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:02:38,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:02:38,347 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-16 21:02:38,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 52 [2021-11-16 21:02:38,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:02:38,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:02:38,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:02:38,678 INFO L354 Elim1Store]: treesize reduction 42, result has 2.3 percent of original size [2021-11-16 21:02:38,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 92 treesize of output 54 [2021-11-16 21:02:39,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:02:39,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:02:39,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 41 [2021-11-16 21:02:39,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:02:39,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-16 21:02:39,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:02:39,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:02:39,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:02:39,262 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-11-16 21:02:39,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 41 [2021-11-16 21:02:39,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:02:39,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:02:39,499 INFO L354 Elim1Store]: treesize reduction 56, result has 1.8 percent of original size [2021-11-16 21:02:39,499 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 48 [2021-11-16 21:02:39,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:02:39,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:02:39,623 INFO L354 Elim1Store]: treesize reduction 108, result has 0.9 percent of original size [2021-11-16 21:02:39,623 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 99 treesize of output 61 [2021-11-16 21:02:40,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:02:40,500 INFO L354 Elim1Store]: treesize reduction 53, result has 20.9 percent of original size [2021-11-16 21:02:40,501 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 6 case distinctions, treesize of input 89 treesize of output 73 [2021-11-16 21:02:40,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:02:40,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:02:40,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 50 [2021-11-16 21:02:40,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:02:40,614 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-16 21:02:40,614 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 87 treesize of output 57 [2021-11-16 21:02:40,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:02:40,634 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-16 21:02:40,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 47 [2021-11-16 21:02:40,753 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-16 21:02:40,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 44 [2021-11-16 21:02:40,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:02:40,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 51 treesize of output 37 [2021-11-16 21:02:40,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:02:40,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:02:40,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:02:40,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 50 [2021-11-16 21:02:40,851 INFO L354 Elim1Store]: treesize reduction 100, result has 22.5 percent of original size [2021-11-16 21:02:40,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 100 treesize of output 94 [2021-11-16 21:02:42,120 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 79 proven. 44 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-16 21:02:42,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:02:46,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899373275] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:02:46,818 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 21:02:46,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 23 [2021-11-16 21:02:46,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90785177] [2021-11-16 21:02:46,818 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 21:02:46,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-16 21:02:46,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:02:46,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-16 21:02:46,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=710, Unknown=2, NotChecked=0, Total=812 [2021-11-16 21:02:46,819 INFO L87 Difference]: Start difference. First operand 217 states and 253 transitions. Second operand has 23 states, 23 states have (on average 5.3478260869565215) internal successors, (123), 21 states have internal predecessors, (123), 9 states have call successors, (38), 7 states have call predecessors, (38), 8 states have return successors, (37), 9 states have call predecessors, (37), 9 states have call successors, (37) [2021-11-16 21:02:48,846 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:02:53,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:02:53,095 INFO L93 Difference]: Finished difference Result 315 states and 359 transitions. [2021-11-16 21:02:53,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-16 21:02:53,096 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.3478260869565215) internal successors, (123), 21 states have internal predecessors, (123), 9 states have call successors, (38), 7 states have call predecessors, (38), 8 states have return successors, (37), 9 states have call predecessors, (37), 9 states have call successors, (37) Word has length 155 [2021-11-16 21:02:53,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:02:53,097 INFO L225 Difference]: With dead ends: 315 [2021-11-16 21:02:53,097 INFO L226 Difference]: Without dead ends: 239 [2021-11-16 21:02:53,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 207 SyntacticMatches, 11 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=290, Invalid=1688, Unknown=2, NotChecked=0, Total=1980 [2021-11-16 21:02:53,098 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 141 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 81 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 1671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 597 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-11-16 21:02:53,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 604 Invalid, 1671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 992 Invalid, 1 Unknown, 597 Unchecked, 5.7s Time] [2021-11-16 21:02:53,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-11-16 21:02:53,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 228. [2021-11-16 21:02:53,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 165 states have (on average 1.0727272727272728) internal successors, (177), 168 states have internal predecessors, (177), 38 states have call successors, (38), 24 states have call predecessors, (38), 24 states have return successors, (44), 35 states have call predecessors, (44), 36 states have call successors, (44) [2021-11-16 21:02:53,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 259 transitions. [2021-11-16 21:02:53,108 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 259 transitions. Word has length 155 [2021-11-16 21:02:53,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:02:53,108 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 259 transitions. [2021-11-16 21:02:53,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.3478260869565215) internal successors, (123), 21 states have internal predecessors, (123), 9 states have call successors, (38), 7 states have call predecessors, (38), 8 states have return successors, (37), 9 states have call predecessors, (37), 9 states have call successors, (37) [2021-11-16 21:02:53,108 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 259 transitions. [2021-11-16 21:02:53,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-16 21:02:53,109 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:02:53,109 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:02:53,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-16 21:02:53,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-16 21:02:53,313 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:02:53,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:02:53,314 INFO L85 PathProgramCache]: Analyzing trace with hash 829993090, now seen corresponding path program 1 times [2021-11-16 21:02:53,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:02:53,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628977025] [2021-11-16 21:02:53,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:02:53,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:02:53,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:53,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 21:02:53,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:53,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 21:02:53,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:53,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-16 21:02:53,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:53,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:02:53,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:53,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 21:02:53,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:53,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-16 21:02:53,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:53,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 21:02:53,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:53,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-16 21:02:53,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:53,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:02:53,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:53,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 21:02:53,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:53,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-16 21:02:53,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:53,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-16 21:02:53,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:53,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-16 21:02:53,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:53,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-16 21:02:53,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:53,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-16 21:02:53,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:53,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-16 21:02:53,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:53,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-11-16 21:02:53,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:53,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-11-16 21:02:53,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:53,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-16 21:02:53,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:53,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-11-16 21:02:53,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:53,748 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 20 proven. 18 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-11-16 21:02:53,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:02:53,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628977025] [2021-11-16 21:02:53,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628977025] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:02:53,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054727789] [2021-11-16 21:02:53,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:02:53,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:02:53,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:02:53,750 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:02:53,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-16 21:02:54,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:02:54,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 2785 conjuncts, 78 conjunts are in the unsatisfiable core [2021-11-16 21:02:54,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:02:54,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-16 21:02:54,339 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-16 21:02:54,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-16 21:02:54,740 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-16 21:02:54,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-16 21:02:54,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-11-16 21:02:56,983 INFO L354 Elim1Store]: treesize reduction 256, result has 23.1 percent of original size [2021-11-16 21:02:56,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 14 case distinctions, treesize of input 87 treesize of output 139 [2021-11-16 21:02:57,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:02:57,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:02:57,510 INFO L354 Elim1Store]: treesize reduction 69, result has 16.9 percent of original size [2021-11-16 21:02:57,511 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 53 [2021-11-16 21:02:57,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:02:57,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:02:57,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:02:57,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 30 [2021-11-16 21:02:57,657 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-16 21:02:58,295 INFO L354 Elim1Store]: treesize reduction 89, result has 13.6 percent of original size [2021-11-16 21:02:58,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 98 treesize of output 78 [2021-11-16 21:02:58,387 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-16 21:02:58,387 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 3 case distinctions, treesize of input 72 treesize of output 42 [2021-11-16 21:02:58,395 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-16 21:02:58,396 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 1 case distinctions, treesize of input 74 treesize of output 56 [2021-11-16 21:03:12,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 19 [2021-11-16 21:03:14,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 19 [2021-11-16 21:03:14,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 19 [2021-11-16 21:03:19,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 19 [2021-11-16 21:03:19,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:03:20,685 INFO L354 Elim1Store]: treesize reduction 1604, result has 11.8 percent of original size [2021-11-16 21:03:20,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 1 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 90 case distinctions, treesize of input 188 treesize of output 309 Killed by 15