./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_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 884fded8e66f5d1fb48ea41b5fc2a80efc48c733a21e019f076525ed24611a3d --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 13:56:48,853 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 13:56:48,864 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 13:56:48,884 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 13:56:48,885 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 13:56:48,885 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 13:56:48,886 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 13:56:48,887 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 13:56:48,888 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 13:56:48,889 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 13:56:48,889 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 13:56:48,890 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 13:56:48,890 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 13:56:48,891 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 13:56:48,892 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 13:56:48,892 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 13:56:48,893 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 13:56:48,893 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 13:56:48,894 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 13:56:48,895 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 13:56:48,896 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 13:56:48,897 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 13:56:48,898 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 13:56:48,898 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 13:56:48,913 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 13:56:48,915 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 13:56:48,916 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 13:56:48,917 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 13:56:48,918 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 13:56:48,919 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 13:56:48,919 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 13:56:48,920 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 13:56:48,921 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 13:56:48,921 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 13:56:48,922 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 13:56:48,923 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 13:56:48,923 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 13:56:48,924 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 13:56:48,924 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 13:56:48,926 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 13:56:48,927 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 13:56:48,928 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-22 13:56:48,946 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 13:56:48,946 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 13:56:48,947 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 13:56:48,947 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 13:56:48,948 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 13:56:48,948 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 13:56:48,949 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 13:56:48,949 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 13:56:48,949 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 13:56:48,949 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 13:56:48,950 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 13:56:48,950 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 13:56:48,950 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 13:56:48,951 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 13:56:48,951 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 13:56:48,951 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 13:56:48,951 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 13:56:48,951 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 13:56:48,951 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 13:56:48,951 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 13:56:48,952 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 13:56:48,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:56:48,952 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 13:56:48,952 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 13:56:48,952 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 13:56:48,952 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 13:56:48,953 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 13:56:48,953 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 13:56:48,954 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 13:56:48,954 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 13:56:48,954 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 13:56:48,954 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 884fded8e66f5d1fb48ea41b5fc2a80efc48c733a21e019f076525ed24611a3d [2021-12-22 13:56:49,138 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 13:56:49,156 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 13:56:49,159 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 13:56:49,160 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 13:56:49,160 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 13:56:49,161 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_harness.i [2021-12-22 13:56:49,217 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f0e25ac4/6d39f3aadc464006a8d7de89bce27f6d/FLAG8f440015d [2021-12-22 13:56:49,797 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 13:56:49,798 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_harness.i [2021-12-22 13:56:49,826 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f0e25ac4/6d39f3aadc464006a8d7de89bce27f6d/FLAG8f440015d [2021-12-22 13:56:50,236 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f0e25ac4/6d39f3aadc464006a8d7de89bce27f6d [2021-12-22 13:56:50,238 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 13:56:50,239 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 13:56:50,241 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 13:56:50,242 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 13:56:50,244 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 13:56:50,244 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:56:50" (1/1) ... [2021-12-22 13:56:50,245 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d7ec4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:56:50, skipping insertion in model container [2021-12-22 13:56:50,246 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:56:50" (1/1) ... [2021-12-22 13:56:50,255 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 13:56:50,351 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 13:56:50,599 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_harness.i[4492,4505] [2021-12-22 13:56:50,606 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_harness.i[4552,4565] [2021-12-22 13:56:51,219 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:56:51,220 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:56:51,221 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:56:51,222 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:56:51,223 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:56:51,238 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:56:51,240 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:56:51,242 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:56:51,242 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:56:51,447 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-22 13:56:51,448 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-22 13:56:51,449 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-22 13:56:51,450 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-22 13:56:51,450 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-22 13:56:51,451 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-22 13:56:51,451 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-22 13:56:51,452 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-22 13:56:51,452 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-22 13:56:51,452 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-22 13:56:51,529 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-22 13:56:51,600 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:56:51,609 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:56:51,667 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:56:51,706 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 13:56:51,719 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_harness.i[4492,4505] [2021-12-22 13:56:51,719 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_harness.i[4552,4565] [2021-12-22 13:56:51,738 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:56:51,743 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:56:51,743 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:56:51,746 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:56:51,747 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:56:51,758 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:56:51,760 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:56:51,761 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:56:51,761 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:56:51,792 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-22 13:56:51,792 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-22 13:56:51,793 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-22 13:56:51,793 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-22 13:56:51,794 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-22 13:56:51,795 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-22 13:56:51,795 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-22 13:56:51,795 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-22 13:56:51,796 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-22 13:56:51,796 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-22 13:56:51,817 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-22 13:56:51,897 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:56:51,898 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:56:51,918 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:56:52,062 INFO L208 MainTranslator]: Completed translation [2021-12-22 13:56:52,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:56:52 WrapperNode [2021-12-22 13:56:52,063 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 13:56:52,064 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 13:56:52,064 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 13:56:52,064 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 13:56:52,069 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:56:52" (1/1) ... [2021-12-22 13:56:52,167 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:56:52" (1/1) ... [2021-12-22 13:56:52,235 INFO L137 Inliner]: procedures = 690, calls = 2637, calls flagged for inlining = 61, calls inlined = 8, statements flattened = 871 [2021-12-22 13:56:52,235 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 13:56:52,236 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 13:56:52,236 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 13:56:52,236 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 13:56:52,268 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:56:52" (1/1) ... [2021-12-22 13:56:52,268 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:56:52" (1/1) ... [2021-12-22 13:56:52,279 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:56:52" (1/1) ... [2021-12-22 13:56:52,280 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:56:52" (1/1) ... [2021-12-22 13:56:52,317 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:56:52" (1/1) ... [2021-12-22 13:56:52,327 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:56:52" (1/1) ... [2021-12-22 13:56:52,332 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:56:52" (1/1) ... [2021-12-22 13:56:52,346 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 13:56:52,351 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 13:56:52,351 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 13:56:52,351 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 13:56:52,352 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:56:52" (1/1) ... [2021-12-22 13:56:52,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:56:52,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:56:52,374 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) [2021-12-22 13:56:52,388 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 [2021-12-22 13:56:52,409 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-12-22 13:56:52,409 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-12-22 13:56:52,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 13:56:52,410 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-22 13:56:52,410 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-22 13:56:52,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~real [2021-12-22 13:56:52,411 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-22 13:56:52,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-22 13:56:52,411 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 13:56:52,411 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-22 13:56:52,412 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-22 13:56:52,412 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-22 13:56:52,412 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-22 13:56:52,413 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 13:56:52,413 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 13:56:52,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 13:56:52,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 13:56:52,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 13:56:52,413 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-22 13:56:52,413 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-22 13:56:52,414 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-12-22 13:56:52,414 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-12-22 13:56:52,414 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-22 13:56:52,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-22 13:56:52,414 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-22 13:56:52,414 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-22 13:56:52,414 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 13:56:52,414 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 13:56:52,415 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_write [2021-12-22 13:56:52,415 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_write [2021-12-22 13:56:52,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-22 13:56:52,416 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-12-22 13:56:52,416 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-12-22 13:56:52,416 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-12-22 13:56:52,416 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-12-22 13:56:52,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 13:56:52,416 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~real [2021-12-22 13:56:52,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 13:56:52,653 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 13:56:52,655 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 13:56:53,356 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 13:56:53,363 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 13:56:53,363 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-22 13:56:53,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:56:53 BoogieIcfgContainer [2021-12-22 13:56:53,365 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 13:56:53,366 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 13:56:53,366 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 13:56:53,369 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 13:56:53,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:56:50" (1/3) ... [2021-12-22 13:56:53,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@567f1d5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:56:53, skipping insertion in model container [2021-12-22 13:56:53,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:56:52" (2/3) ... [2021-12-22 13:56:53,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@567f1d5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:56:53, skipping insertion in model container [2021-12-22 13:56:53,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:56:53" (3/3) ... [2021-12-22 13:56:53,371 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_write_harness.i [2021-12-22 13:56:53,375 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 13:56:53,375 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 13:56:53,412 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 13:56:53,418 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 [2021-12-22 13:56:53,418 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 13:56:53,432 INFO L276 IsEmpty]: Start isEmpty. Operand has 129 states, 85 states have (on average 1.2705882352941176) internal successors, (108), 86 states have internal predecessors, (108), 32 states have call successors, (32), 10 states have call predecessors, (32), 10 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-12-22 13:56:53,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-22 13:56:53,441 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:56:53,442 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:56:53,442 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:56:53,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:56:53,446 INFO L85 PathProgramCache]: Analyzing trace with hash 259728785, now seen corresponding path program 1 times [2021-12-22 13:56:53,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:56:53,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353828866] [2021-12-22 13:56:53,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:53,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:56:53,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:53,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 13:56:53,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:53,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:53,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:53,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 13:56:53,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:53,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 13:56:53,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:53,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:53,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:53,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 13:56:53,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:53,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-22 13:56:53,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:54,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:56:54,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:54,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-22 13:56:54,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:54,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-22 13:56:54,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:54,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-22 13:56:54,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:54,048 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-22 13:56:54,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:56:54,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353828866] [2021-12-22 13:56:54,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353828866] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:56:54,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41115495] [2021-12-22 13:56:54,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:54,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:56:54,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:56:54,052 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) [2021-12-22 13:56:54,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 13:56:54,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:54,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 2556 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 13:56:54,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:56:54,670 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-22 13:56:54,670 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:56:54,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41115495] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:56:54,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:56:54,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-12-22 13:56:54,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530816588] [2021-12-22 13:56:54,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:56:54,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:56:54,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:56:54,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:56:54,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:56:54,694 INFO L87 Difference]: Start difference. First operand has 129 states, 85 states have (on average 1.2705882352941176) internal successors, (108), 86 states have internal predecessors, (108), 32 states have call successors, (32), 10 states have call predecessors, (32), 10 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-22 13:56:54,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:56:54,852 INFO L93 Difference]: Finished difference Result 258 states and 370 transitions. [2021-12-22 13:56:54,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 13:56:54,854 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 77 [2021-12-22 13:56:54,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:56:54,860 INFO L225 Difference]: With dead ends: 258 [2021-12-22 13:56:54,860 INFO L226 Difference]: Without dead ends: 127 [2021-12-22 13:56:54,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-12-22 13:56:54,865 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 202 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:56:54,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 467 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 13:56:54,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-12-22 13:56:54,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-12-22 13:56:54,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 83 states have (on average 1.2530120481927711) internal successors, (104), 85 states have internal predecessors, (104), 32 states have call successors, (32), 10 states have call predecessors, (32), 11 states have return successors, (34), 31 states have call predecessors, (34), 31 states have call successors, (34) [2021-12-22 13:56:54,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 170 transitions. [2021-12-22 13:56:54,899 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 170 transitions. Word has length 77 [2021-12-22 13:56:54,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:56:54,899 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 170 transitions. [2021-12-22 13:56:54,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-22 13:56:54,900 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 170 transitions. [2021-12-22 13:56:54,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-22 13:56:54,902 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:56:54,903 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:56:54,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 13:56:55,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-12-22 13:56:55,123 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:56:55,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:56:55,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1492783356, now seen corresponding path program 1 times [2021-12-22 13:56:55,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:56:55,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458348255] [2021-12-22 13:56:55,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:55,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:56:55,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:55,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 13:56:55,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:55,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:55,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:55,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 13:56:55,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:55,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 13:56:55,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:55,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:55,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:55,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 13:56:55,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:55,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 13:56:55,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:55,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-22 13:56:55,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:55,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-22 13:56:55,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:55,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 13:56:55,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:55,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-22 13:56:55,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:55,372 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-22 13:56:55,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:56:55,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458348255] [2021-12-22 13:56:55,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458348255] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:56:55,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13476188] [2021-12-22 13:56:55,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:55,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:56:55,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:56:55,374 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) [2021-12-22 13:56:55,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 13:56:55,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:55,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 2573 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 13:56:55,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:56:55,940 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-22 13:56:55,941 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:56:55,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13476188] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:56:55,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:56:55,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2021-12-22 13:56:55,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178694544] [2021-12-22 13:56:55,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:56:55,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 13:56:55,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:56:55,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 13:56:55,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-12-22 13:56:55,943 INFO L87 Difference]: Start difference. First operand 127 states and 170 transitions. Second operand has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 4 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-22 13:56:56,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:56:56,251 INFO L93 Difference]: Finished difference Result 220 states and 297 transitions. [2021-12-22 13:56:56,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 13:56:56,252 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 4 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 83 [2021-12-22 13:56:56,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:56:56,253 INFO L225 Difference]: With dead ends: 220 [2021-12-22 13:56:56,253 INFO L226 Difference]: Without dead ends: 124 [2021-12-22 13:56:56,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-12-22 13:56:56,255 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 207 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 13:56:56,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 640 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 13:56:56,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-22 13:56:56,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-12-22 13:56:56,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 81 states have (on average 1.2469135802469136) internal successors, (101), 82 states have internal predecessors, (101), 32 states have call successors, (32), 10 states have call predecessors, (32), 10 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-12-22 13:56:56,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 164 transitions. [2021-12-22 13:56:56,264 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 164 transitions. Word has length 83 [2021-12-22 13:56:56,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:56:56,264 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 164 transitions. [2021-12-22 13:56:56,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 4 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-22 13:56:56,265 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 164 transitions. [2021-12-22 13:56:56,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-22 13:56:56,267 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:56:56,267 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:56:56,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 13:56:56,471 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,SelfDestructingSolverStorable1 [2021-12-22 13:56:56,472 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:56:56,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:56:56,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1451742418, now seen corresponding path program 1 times [2021-12-22 13:56:56,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:56:56,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919685857] [2021-12-22 13:56:56,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:56,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:56:56,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:56,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 13:56:56,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:56,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:56,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:56,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 13:56:56,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:56,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 13:56:56,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:56,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:56,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:56,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 13:56:56,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:56,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 13:56:56,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:56,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-22 13:56:56,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:56,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 13:56:56,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:56,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-22 13:56:56,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:56,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-22 13:56:56,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:56,816 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-22 13:56:56,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:56:56,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919685857] [2021-12-22 13:56:56,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919685857] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:56:56,817 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:56:56,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 13:56:56,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437914839] [2021-12-22 13:56:56,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:56:56,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:56:56,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:56:56,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:56:56,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:56:56,819 INFO L87 Difference]: Start difference. First operand 124 states and 164 transitions. Second operand has 9 states, 8 states have (on average 5.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-22 13:56:57,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:56:57,377 INFO L93 Difference]: Finished difference Result 136 states and 180 transitions. [2021-12-22 13:56:57,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:56:57,378 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (12), 3 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 95 [2021-12-22 13:56:57,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:56:57,379 INFO L225 Difference]: With dead ends: 136 [2021-12-22 13:56:57,379 INFO L226 Difference]: Without dead ends: 134 [2021-12-22 13:56:57,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-12-22 13:56:57,380 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 86 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 13:56:57,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 746 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 13:56:57,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-12-22 13:56:57,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2021-12-22 13:56:57,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 87 states have (on average 1.2298850574712643) internal successors, (107), 89 states have internal predecessors, (107), 33 states have call successors, (33), 11 states have call predecessors, (33), 12 states have return successors, (37), 32 states have call predecessors, (37), 32 states have call successors, (37) [2021-12-22 13:56:57,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 177 transitions. [2021-12-22 13:56:57,390 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 177 transitions. Word has length 95 [2021-12-22 13:56:57,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:56:57,390 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 177 transitions. [2021-12-22 13:56:57,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-22 13:56:57,391 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 177 transitions. [2021-12-22 13:56:57,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-22 13:56:57,393 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:56:57,393 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:56:57,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 13:56:57,393 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:56:57,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:56:57,393 INFO L85 PathProgramCache]: Analyzing trace with hash -364356006, now seen corresponding path program 1 times [2021-12-22 13:56:57,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:56:57,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529175025] [2021-12-22 13:56:57,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:57,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:56:57,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:57,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 13:56:57,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:57,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:57,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:57,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 13:56:57,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:57,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 13:56:57,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:57,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:57,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:57,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 13:56:57,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:57,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 13:56:57,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:57,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-22 13:56:57,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:57,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 13:56:57,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:57,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-22 13:56:57,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:57,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-22 13:56:57,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:57,714 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-22 13:56:57,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:56:57,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529175025] [2021-12-22 13:56:57,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529175025] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:56:57,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:56:57,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:56:57,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121852504] [2021-12-22 13:56:57,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:56:57,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:56:57,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:56:57,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:56:57,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:56:57,718 INFO L87 Difference]: Start difference. First operand 133 states and 177 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-22 13:56:58,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:56:58,143 INFO L93 Difference]: Finished difference Result 267 states and 371 transitions. [2021-12-22 13:56:58,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:56:58,144 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (12), 3 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 99 [2021-12-22 13:56:58,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:56:58,146 INFO L225 Difference]: With dead ends: 267 [2021-12-22 13:56:58,146 INFO L226 Difference]: Without dead ends: 158 [2021-12-22 13:56:58,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:56:58,147 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 126 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 13:56:58,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 439 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 13:56:58,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-12-22 13:56:58,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 138. [2021-12-22 13:56:58,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 92 states have (on average 1.2391304347826086) internal successors, (114), 94 states have internal predecessors, (114), 33 states have call successors, (33), 11 states have call predecessors, (33), 12 states have return successors, (37), 32 states have call predecessors, (37), 32 states have call successors, (37) [2021-12-22 13:56:58,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 184 transitions. [2021-12-22 13:56:58,157 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 184 transitions. Word has length 99 [2021-12-22 13:56:58,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:56:58,157 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 184 transitions. [2021-12-22 13:56:58,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-22 13:56:58,158 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 184 transitions. [2021-12-22 13:56:58,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-22 13:56:58,159 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:56:58,159 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:56:58,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 13:56:58,159 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:56:58,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:56:58,160 INFO L85 PathProgramCache]: Analyzing trace with hash -106190568, now seen corresponding path program 1 times [2021-12-22 13:56:58,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:56:58,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639463773] [2021-12-22 13:56:58,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:58,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:56:58,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:58,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 13:56:58,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:58,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:58,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:58,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 13:56:58,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:58,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 13:56:58,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:58,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:58,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:58,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 13:56:58,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:58,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 13:56:58,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:58,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-22 13:56:58,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:58,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 13:56:58,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:58,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-22 13:56:58,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:58,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-22 13:56:58,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:58,626 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-22 13:56:58,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:56:58,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639463773] [2021-12-22 13:56:58,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639463773] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:56:58,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417280999] [2021-12-22 13:56:58,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:58,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:56:58,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:56:58,629 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) [2021-12-22 13:56:58,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 13:56:58,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:58,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 2614 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-22 13:56:58,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:56:59,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-22 13:56:59,494 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-22 13:56:59,494 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:56:59,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417280999] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:56:59,494 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:56:59,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [17] total 27 [2021-12-22 13:56:59,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135635275] [2021-12-22 13:56:59,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:56:59,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-22 13:56:59,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:56:59,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-22 13:56:59,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2021-12-22 13:56:59,495 INFO L87 Difference]: Start difference. First operand 138 states and 184 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 10 states have internal predecessors, (56), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-22 13:56:59,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:56:59,559 INFO L93 Difference]: Finished difference Result 275 states and 368 transitions. [2021-12-22 13:56:59,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 13:56:59,560 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 10 states have internal predecessors, (56), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 99 [2021-12-22 13:56:59,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:56:59,561 INFO L225 Difference]: With dead ends: 275 [2021-12-22 13:56:59,561 INFO L226 Difference]: Without dead ends: 157 [2021-12-22 13:56:59,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-12-22 13:56:59,562 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 28 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:56:59,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 747 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 22 Invalid, 0 Unknown, 62 Unchecked, 0.0s Time] [2021-12-22 13:56:59,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-12-22 13:56:59,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2021-12-22 13:56:59,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 110 states have (on average 1.2454545454545454) internal successors, (137), 112 states have internal predecessors, (137), 33 states have call successors, (33), 12 states have call predecessors, (33), 13 states have return successors, (37), 32 states have call predecessors, (37), 32 states have call successors, (37) [2021-12-22 13:56:59,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 207 transitions. [2021-12-22 13:56:59,570 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 207 transitions. Word has length 99 [2021-12-22 13:56:59,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:56:59,571 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 207 transitions. [2021-12-22 13:56:59,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 10 states have internal predecessors, (56), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-22 13:56:59,571 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 207 transitions. [2021-12-22 13:56:59,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-22 13:56:59,572 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:56:59,572 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:56:59,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 13:56:59,793 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 [2021-12-22 13:56:59,793 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:56:59,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:56:59,794 INFO L85 PathProgramCache]: Analyzing trace with hash -523587174, now seen corresponding path program 1 times [2021-12-22 13:56:59,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:56:59,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688138917] [2021-12-22 13:56:59,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:59,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:56:59,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:59,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 13:56:59,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:59,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:59,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:59,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 13:56:59,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:59,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 13:56:59,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:59,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:59,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:59,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 13:56:59,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:59,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 13:56:59,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:59,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-22 13:56:59,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:59,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 13:56:59,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:59,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-22 13:56:59,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:59,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-22 13:56:59,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:59,968 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-22 13:56:59,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:56:59,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688138917] [2021-12-22 13:56:59,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688138917] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:56:59,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523691356] [2021-12-22 13:56:59,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:59,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:56:59,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:56:59,970 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) [2021-12-22 13:56:59,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 13:57:00,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:00,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 2609 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 13:57:00,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:57:00,469 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-22 13:57:00,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:57:00,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523691356] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:57:00,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:57:00,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-12-22 13:57:00,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285169162] [2021-12-22 13:57:00,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:57:00,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 13:57:00,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:57:00,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 13:57:00,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:57:00,470 INFO L87 Difference]: Start difference. First operand 157 states and 207 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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) [2021-12-22 13:57:00,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:57:00,489 INFO L93 Difference]: Finished difference Result 284 states and 385 transitions. [2021-12-22 13:57:00,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:57:00,489 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 99 [2021-12-22 13:57:00,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:57:00,491 INFO L225 Difference]: With dead ends: 284 [2021-12-22 13:57:00,491 INFO L226 Difference]: Without dead ends: 166 [2021-12-22 13:57:00,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:57:00,492 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 20 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:57:00,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 484 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:57:00,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-12-22 13:57:00,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 149. [2021-12-22 13:57:00,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 103 states have (on average 1.2427184466019416) internal successors, (128), 104 states have internal predecessors, (128), 33 states have call successors, (33), 12 states have call predecessors, (33), 12 states have return successors, (36), 32 states have call predecessors, (36), 32 states have call successors, (36) [2021-12-22 13:57:00,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 197 transitions. [2021-12-22 13:57:00,499 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 197 transitions. Word has length 99 [2021-12-22 13:57:00,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:57:00,500 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 197 transitions. [2021-12-22 13:57:00,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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) [2021-12-22 13:57:00,500 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 197 transitions. [2021-12-22 13:57:00,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-22 13:57:00,501 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:57:00,501 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:57:00,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 13:57:00,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:57:00,721 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:57:00,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:57:00,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1130210654, now seen corresponding path program 2 times [2021-12-22 13:57:00,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:57:00,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225543197] [2021-12-22 13:57:00,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:57:00,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:57:00,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:00,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 13:57:00,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:00,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:57:00,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:00,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 13:57:00,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:00,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 13:57:00,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:00,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:57:00,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:00,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 13:57:00,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:00,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:57:00,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:00,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-22 13:57:00,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:00,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:57:00,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:00,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-22 13:57:00,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:00,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-22 13:57:00,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:00,959 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-22 13:57:00,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:57:00,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225543197] [2021-12-22 13:57:00,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225543197] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:57:00,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555946560] [2021-12-22 13:57:00,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 13:57:00,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:57:00,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:57:00,961 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) [2021-12-22 13:57:00,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 13:57:01,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 13:57:01,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:57:01,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 2621 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-22 13:57:01,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:57:01,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-22 13:57:02,072 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-22 13:57:02,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:57:02,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555946560] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:57:02,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:57:02,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [10] total 22 [2021-12-22 13:57:02,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163562351] [2021-12-22 13:57:02,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:57:02,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 13:57:02,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:57:02,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 13:57:02,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-12-22 13:57:02,074 INFO L87 Difference]: Start difference. First operand 149 states and 197 transitions. Second operand has 14 states, 13 states have (on average 5.538461538461538) internal successors, (72), 12 states have internal predecessors, (72), 6 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2021-12-22 13:57:02,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:57:02,396 INFO L93 Difference]: Finished difference Result 340 states and 458 transitions. [2021-12-22 13:57:02,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 13:57:02,396 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 5.538461538461538) internal successors, (72), 12 states have internal predecessors, (72), 6 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 103 [2021-12-22 13:57:02,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:57:02,398 INFO L225 Difference]: With dead ends: 340 [2021-12-22 13:57:02,398 INFO L226 Difference]: Without dead ends: 228 [2021-12-22 13:57:02,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 109 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-12-22 13:57:02,399 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 55 mSDsluCounter, 1609 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1789 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 13:57:02,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 1789 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 195 Invalid, 0 Unknown, 113 Unchecked, 0.3s Time] [2021-12-22 13:57:02,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-12-22 13:57:02,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 175. [2021-12-22 13:57:02,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 124 states have (on average 1.2338709677419355) internal successors, (153), 126 states have internal predecessors, (153), 36 states have call successors, (36), 14 states have call predecessors, (36), 14 states have return successors, (41), 34 states have call predecessors, (41), 35 states have call successors, (41) [2021-12-22 13:57:02,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 230 transitions. [2021-12-22 13:57:02,407 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 230 transitions. Word has length 103 [2021-12-22 13:57:02,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:57:02,407 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 230 transitions. [2021-12-22 13:57:02,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 5.538461538461538) internal successors, (72), 12 states have internal predecessors, (72), 6 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2021-12-22 13:57:02,407 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 230 transitions. [2021-12-22 13:57:02,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-22 13:57:02,408 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:57:02,408 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:57:02,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 13:57:02,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:57:02,629 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:57:02,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:57:02,629 INFO L85 PathProgramCache]: Analyzing trace with hash 660059013, now seen corresponding path program 1 times [2021-12-22 13:57:02,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:57:02,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423643199] [2021-12-22 13:57:02,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:57:02,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:57:02,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:02,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 13:57:02,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:02,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:57:02,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:02,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 13:57:02,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:02,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 13:57:02,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:02,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:57:02,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:02,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 13:57:02,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:02,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-22 13:57:02,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:02,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-22 13:57:02,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:02,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-22 13:57:02,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:02,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-22 13:57:02,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:02,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-22 13:57:02,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:02,785 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-22 13:57:02,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:57:02,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423643199] [2021-12-22 13:57:02,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423643199] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:57:02,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337035398] [2021-12-22 13:57:02,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:57:02,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:57:02,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:57:02,787 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) [2021-12-22 13:57:02,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 13:57:03,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:03,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 2631 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 13:57:03,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:57:03,258 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-22 13:57:03,258 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:57:03,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337035398] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:57:03,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:57:03,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-12-22 13:57:03,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391269670] [2021-12-22 13:57:03,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:57:03,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 13:57:03,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:57:03,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 13:57:03,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:57:03,260 INFO L87 Difference]: Start difference. First operand 175 states and 230 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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) [2021-12-22 13:57:03,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:57:03,278 INFO L93 Difference]: Finished difference Result 342 states and 459 transitions. [2021-12-22 13:57:03,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:57:03,279 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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 105 [2021-12-22 13:57:03,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:57:03,280 INFO L225 Difference]: With dead ends: 342 [2021-12-22 13:57:03,280 INFO L226 Difference]: Without dead ends: 191 [2021-12-22 13:57:03,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:57:03,281 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 9 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:57:03,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 477 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:57:03,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-12-22 13:57:03,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 179. [2021-12-22 13:57:03,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 128 states have (on average 1.2265625) internal successors, (157), 130 states have internal predecessors, (157), 36 states have call successors, (36), 14 states have call predecessors, (36), 14 states have return successors, (41), 34 states have call predecessors, (41), 35 states have call successors, (41) [2021-12-22 13:57:03,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 234 transitions. [2021-12-22 13:57:03,289 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 234 transitions. Word has length 105 [2021-12-22 13:57:03,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:57:03,289 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 234 transitions. [2021-12-22 13:57:03,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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) [2021-12-22 13:57:03,289 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 234 transitions. [2021-12-22 13:57:03,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-22 13:57:03,290 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:57:03,290 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:57:03,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 13:57:03,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:57:03,505 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:57:03,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:57:03,505 INFO L85 PathProgramCache]: Analyzing trace with hash -974393564, now seen corresponding path program 1 times [2021-12-22 13:57:03,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:57:03,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310145665] [2021-12-22 13:57:03,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:57:03,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:57:03,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:03,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 13:57:03,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:03,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:57:03,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:03,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 13:57:03,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:03,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 13:57:03,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:03,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:57:03,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:03,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 13:57:03,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:03,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:57:03,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:03,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-22 13:57:03,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:03,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-22 13:57:03,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:03,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-22 13:57:03,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:03,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 13:57:03,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:03,709 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-22 13:57:03,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:57:03,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310145665] [2021-12-22 13:57:03,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310145665] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:57:03,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033884185] [2021-12-22 13:57:03,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:57:03,710 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:57:03,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:57:03,711 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) [2021-12-22 13:57:03,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 13:57:04,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:04,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-22 13:57:04,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:57:04,240 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-22 13:57:04,241 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:57:04,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033884185] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:57:04,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:57:04,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 11 [2021-12-22 13:57:04,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419139974] [2021-12-22 13:57:04,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:57:04,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:57:04,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:57:04,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:57:04,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:57:04,243 INFO L87 Difference]: Start difference. First operand 179 states and 234 transitions. Second operand has 9 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-22 13:57:04,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:57:04,331 INFO L93 Difference]: Finished difference Result 337 states and 445 transitions. [2021-12-22 13:57:04,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:57:04,331 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 3 states have call successors, (12), 2 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 107 [2021-12-22 13:57:04,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:57:04,332 INFO L225 Difference]: With dead ends: 337 [2021-12-22 13:57:04,332 INFO L226 Difference]: Without dead ends: 189 [2021-12-22 13:57:04,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-12-22 13:57:04,333 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 12 mSDsluCounter, 1072 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1230 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:57:04,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1230 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 13:57:04,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-12-22 13:57:04,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2021-12-22 13:57:04,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 136 states have (on average 1.213235294117647) internal successors, (165), 140 states have internal predecessors, (165), 36 states have call successors, (36), 14 states have call predecessors, (36), 16 states have return successors, (46), 34 states have call predecessors, (46), 35 states have call successors, (46) [2021-12-22 13:57:04,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 247 transitions. [2021-12-22 13:57:04,342 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 247 transitions. Word has length 107 [2021-12-22 13:57:04,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:57:04,342 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 247 transitions. [2021-12-22 13:57:04,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-22 13:57:04,342 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 247 transitions. [2021-12-22 13:57:04,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-22 13:57:04,343 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:57:04,343 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:57:04,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 13:57:04,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:57:04,559 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:57:04,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:57:04,560 INFO L85 PathProgramCache]: Analyzing trace with hash 424675785, now seen corresponding path program 1 times [2021-12-22 13:57:04,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:57:04,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525773854] [2021-12-22 13:57:04,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:57:04,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:57:04,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:04,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 13:57:04,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:04,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:57:04,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:04,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 13:57:04,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:04,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 13:57:04,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:04,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:57:04,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:04,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 13:57:04,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:04,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-22 13:57:04,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:04,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-22 13:57:04,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:04,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-22 13:57:04,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:04,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-22 13:57:04,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:04,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-22 13:57:04,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:04,704 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-12-22 13:57:04,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:57:04,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525773854] [2021-12-22 13:57:04,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525773854] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:57:04,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254158004] [2021-12-22 13:57:04,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:57:04,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:57:04,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:57:04,706 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) [2021-12-22 13:57:04,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 13:57:05,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:05,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 2633 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 13:57:05,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:57:05,159 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-22 13:57:05,160 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:57:05,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254158004] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:57:05,160 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:57:05,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-12-22 13:57:05,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362482373] [2021-12-22 13:57:05,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:57:05,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 13:57:05,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:57:05,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 13:57:05,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:57:05,161 INFO L87 Difference]: Start difference. First operand 189 states and 247 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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) [2021-12-22 13:57:05,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:57:05,180 INFO L93 Difference]: Finished difference Result 376 states and 505 transitions. [2021-12-22 13:57:05,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:57:05,181 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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 105 [2021-12-22 13:57:05,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:57:05,182 INFO L225 Difference]: With dead ends: 376 [2021-12-22 13:57:05,182 INFO L226 Difference]: Without dead ends: 211 [2021-12-22 13:57:05,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:57:05,183 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 26 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:57:05,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 492 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:57:05,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-12-22 13:57:05,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 187. [2021-12-22 13:57:05,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 134 states have (on average 1.1940298507462686) internal successors, (160), 138 states have internal predecessors, (160), 36 states have call successors, (36), 14 states have call predecessors, (36), 16 states have return successors, (46), 34 states have call predecessors, (46), 35 states have call successors, (46) [2021-12-22 13:57:05,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 242 transitions. [2021-12-22 13:57:05,189 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 242 transitions. Word has length 105 [2021-12-22 13:57:05,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:57:05,190 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 242 transitions. [2021-12-22 13:57:05,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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) [2021-12-22 13:57:05,190 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 242 transitions. [2021-12-22 13:57:05,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-22 13:57:05,191 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:57:05,191 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:57:05,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-22 13:57:05,407 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,SelfDestructingSolverStorable9 [2021-12-22 13:57:05,407 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:57:05,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:57:05,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1333461873, now seen corresponding path program 1 times [2021-12-22 13:57:05,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:57:05,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127279601] [2021-12-22 13:57:05,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:57:05,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:57:05,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:05,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 13:57:05,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:05,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:57:05,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:05,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 13:57:05,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:05,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 13:57:05,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:05,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:57:05,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:05,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 13:57:05,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:05,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-22 13:57:05,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:05,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-22 13:57:05,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:05,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-22 13:57:05,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:05,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-22 13:57:05,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:05,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-22 13:57:05,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:05,621 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-22 13:57:05,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:57:05,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127279601] [2021-12-22 13:57:05,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127279601] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:57:05,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292588951] [2021-12-22 13:57:05,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:57:05,622 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:57:05,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:57:05,623 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) [2021-12-22 13:57:05,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 13:57:05,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:05,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 2630 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-22 13:57:05,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:57:06,066 INFO L387 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 [2021-12-22 13:57:06,631 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 64 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-22 13:57:06,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:57:07,096 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-22 13:57:07,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292588951] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:57:07,096 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:57:07,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16, 11] total 32 [2021-12-22 13:57:07,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995302173] [2021-12-22 13:57:07,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:57:07,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-22 13:57:07,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:57:07,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-22 13:57:07,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2021-12-22 13:57:07,098 INFO L87 Difference]: Start difference. First operand 187 states and 242 transitions. Second operand has 32 states, 28 states have (on average 5.0) internal successors, (140), 28 states have internal predecessors, (140), 10 states have call successors, (28), 6 states have call predecessors, (28), 8 states have return successors, (23), 7 states have call predecessors, (23), 10 states have call successors, (23) [2021-12-22 13:57:09,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:57:09,700 INFO L93 Difference]: Finished difference Result 407 states and 545 transitions. [2021-12-22 13:57:09,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-22 13:57:09,700 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 28 states have (on average 5.0) internal successors, (140), 28 states have internal predecessors, (140), 10 states have call successors, (28), 6 states have call predecessors, (28), 8 states have return successors, (23), 7 states have call predecessors, (23), 10 states have call successors, (23) Word has length 109 [2021-12-22 13:57:09,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:57:09,701 INFO L225 Difference]: With dead ends: 407 [2021-12-22 13:57:09,702 INFO L226 Difference]: Without dead ends: 243 [2021-12-22 13:57:09,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 223 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=475, Invalid=3557, Unknown=0, NotChecked=0, Total=4032 [2021-12-22 13:57:09,703 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 362 mSDsluCounter, 1787 mSDsCounter, 0 mSdLazyCounter, 2492 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 1979 SdHoareTripleChecker+Invalid, 3124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 2492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 522 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-22 13:57:09,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 1979 Invalid, 3124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 2492 Invalid, 0 Unknown, 522 Unchecked, 1.8s Time] [2021-12-22 13:57:09,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-12-22 13:57:09,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 237. [2021-12-22 13:57:09,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 162 states have (on average 1.1851851851851851) internal successors, (192), 166 states have internal predecessors, (192), 56 states have call successors, (56), 17 states have call predecessors, (56), 18 states have return successors, (73), 53 states have call predecessors, (73), 55 states have call successors, (73) [2021-12-22 13:57:09,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 321 transitions. [2021-12-22 13:57:09,719 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 321 transitions. Word has length 109 [2021-12-22 13:57:09,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:57:09,719 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 321 transitions. [2021-12-22 13:57:09,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 28 states have (on average 5.0) internal successors, (140), 28 states have internal predecessors, (140), 10 states have call successors, (28), 6 states have call predecessors, (28), 8 states have return successors, (23), 7 states have call predecessors, (23), 10 states have call successors, (23) [2021-12-22 13:57:09,722 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 321 transitions. [2021-12-22 13:57:09,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-22 13:57:09,723 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:57:09,723 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:57:09,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-22 13:57:09,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:57:09,939 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:57:09,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:57:09,940 INFO L85 PathProgramCache]: Analyzing trace with hash 48962428, now seen corresponding path program 1 times [2021-12-22 13:57:09,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:57:09,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026148872] [2021-12-22 13:57:09,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:57:09,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:57:10,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:10,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 13:57:10,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:10,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:57:10,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:10,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 13:57:10,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:10,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 13:57:10,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:10,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:57:10,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:10,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 13:57:10,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:10,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-22 13:57:10,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:10,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-22 13:57:10,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:10,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-22 13:57:10,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:10,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-22 13:57:10,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:10,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-22 13:57:10,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:10,476 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-22 13:57:10,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:57:10,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026148872] [2021-12-22 13:57:10,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026148872] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:57:10,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325550119] [2021-12-22 13:57:10,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:57:10,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:57:10,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:57:10,478 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) [2021-12-22 13:57:10,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-22 13:57:10,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:10,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 2637 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-22 13:57:10,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:57:11,703 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 46 proven. 32 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-22 13:57:11,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:57:12,019 INFO L387 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 10 treesize of output 6 [2021-12-22 13:57:12,125 INFO L353 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-12-22 13:57:12,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2021-12-22 13:57:12,401 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-22 13:57:12,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325550119] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:57:12,401 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:57:12,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 17] total 40 [2021-12-22 13:57:12,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954251549] [2021-12-22 13:57:12,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:57:12,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-22 13:57:12,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:57:12,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-22 13:57:12,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1435, Unknown=0, NotChecked=0, Total=1560 [2021-12-22 13:57:12,403 INFO L87 Difference]: Start difference. First operand 237 states and 321 transitions. Second operand has 40 states, 36 states have (on average 4.055555555555555) internal successors, (146), 31 states have internal predecessors, (146), 16 states have call successors, (34), 8 states have call predecessors, (34), 10 states have return successors, (31), 17 states have call predecessors, (31), 14 states have call successors, (31) [2021-12-22 13:57:15,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:57:15,911 INFO L93 Difference]: Finished difference Result 508 states and 717 transitions. [2021-12-22 13:57:15,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-22 13:57:15,911 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 36 states have (on average 4.055555555555555) internal successors, (146), 31 states have internal predecessors, (146), 16 states have call successors, (34), 8 states have call predecessors, (34), 10 states have return successors, (31), 17 states have call predecessors, (31), 14 states have call successors, (31) Word has length 111 [2021-12-22 13:57:15,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:57:15,913 INFO L225 Difference]: With dead ends: 508 [2021-12-22 13:57:15,913 INFO L226 Difference]: Without dead ends: 342 [2021-12-22 13:57:15,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 212 SyntacticMatches, 11 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1166 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=400, Invalid=4430, Unknown=0, NotChecked=0, Total=4830 [2021-12-22 13:57:15,915 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 203 mSDsluCounter, 2483 mSDsCounter, 0 mSdLazyCounter, 3170 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 2661 SdHoareTripleChecker+Invalid, 3729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 3170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 434 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-22 13:57:15,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 2661 Invalid, 3729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 3170 Invalid, 0 Unknown, 434 Unchecked, 2.5s Time] [2021-12-22 13:57:15,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-12-22 13:57:15,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 272. [2021-12-22 13:57:15,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 194 states have (on average 1.1649484536082475) internal successors, (226), 199 states have internal predecessors, (226), 56 states have call successors, (56), 19 states have call predecessors, (56), 21 states have return successors, (80), 53 states have call predecessors, (80), 55 states have call successors, (80) [2021-12-22 13:57:15,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 362 transitions. [2021-12-22 13:57:15,934 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 362 transitions. Word has length 111 [2021-12-22 13:57:15,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:57:15,934 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 362 transitions. [2021-12-22 13:57:15,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 36 states have (on average 4.055555555555555) internal successors, (146), 31 states have internal predecessors, (146), 16 states have call successors, (34), 8 states have call predecessors, (34), 10 states have return successors, (31), 17 states have call predecessors, (31), 14 states have call successors, (31) [2021-12-22 13:57:15,935 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 362 transitions. [2021-12-22 13:57:15,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-22 13:57:15,936 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:57:15,936 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:57:15,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-22 13:57:16,151 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,SelfDestructingSolverStorable11 [2021-12-22 13:57:16,151 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:57:16,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:57:16,152 INFO L85 PathProgramCache]: Analyzing trace with hash 267817146, now seen corresponding path program 1 times [2021-12-22 13:57:16,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:57:16,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518943923] [2021-12-22 13:57:16,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:57:16,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:57:16,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:16,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 13:57:16,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:16,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:57:16,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:16,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 13:57:16,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:16,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 13:57:16,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:16,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:57:16,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:16,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 13:57:16,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:16,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-22 13:57:16,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:16,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-22 13:57:16,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:16,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-22 13:57:16,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:16,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-22 13:57:16,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:16,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-22 13:57:16,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:16,569 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 18 proven. 14 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-22 13:57:16,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:57:16,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518943923] [2021-12-22 13:57:16,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518943923] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:57:16,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112139445] [2021-12-22 13:57:16,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:57:16,570 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:57:16,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:57:16,571 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) [2021-12-22 13:57:16,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-22 13:57:16,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:16,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 2642 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-22 13:57:16,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:57:17,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 13:57:17,531 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 73 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-22 13:57:17,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:57:17,982 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-22 13:57:17,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112139445] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:57:17,982 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:57:17,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 11] total 29 [2021-12-22 13:57:17,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569035853] [2021-12-22 13:57:17,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:57:17,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-22 13:57:17,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:57:17,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-22 13:57:17,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2021-12-22 13:57:17,984 INFO L87 Difference]: Start difference. First operand 272 states and 362 transitions. Second operand has 29 states, 27 states have (on average 5.444444444444445) internal successors, (147), 25 states have internal predecessors, (147), 10 states have call successors, (27), 6 states have call predecessors, (27), 7 states have return successors, (23), 9 states have call predecessors, (23), 10 states have call successors, (23) [2021-12-22 13:57:20,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:57:20,711 INFO L93 Difference]: Finished difference Result 530 states and 742 transitions. [2021-12-22 13:57:20,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-22 13:57:20,712 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 5.444444444444445) internal successors, (147), 25 states have internal predecessors, (147), 10 states have call successors, (27), 6 states have call predecessors, (27), 7 states have return successors, (23), 9 states have call predecessors, (23), 10 states have call successors, (23) Word has length 111 [2021-12-22 13:57:20,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:57:20,714 INFO L225 Difference]: With dead ends: 530 [2021-12-22 13:57:20,714 INFO L226 Difference]: Without dead ends: 351 [2021-12-22 13:57:20,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 230 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=316, Invalid=2336, Unknown=0, NotChecked=0, Total=2652 [2021-12-22 13:57:20,716 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 480 mSDsluCounter, 1289 mSDsCounter, 0 mSdLazyCounter, 2841 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 1487 SdHoareTripleChecker+Invalid, 4055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 2841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 957 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:57:20,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [516 Valid, 1487 Invalid, 4055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 2841 Invalid, 0 Unknown, 957 Unchecked, 2.2s Time] [2021-12-22 13:57:20,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-12-22 13:57:20,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 273. [2021-12-22 13:57:20,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 193 states have (on average 1.1554404145077721) internal successors, (223), 197 states have internal predecessors, (223), 59 states have call successors, (59), 19 states have call predecessors, (59), 20 states have return successors, (82), 56 states have call predecessors, (82), 58 states have call successors, (82) [2021-12-22 13:57:20,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 364 transitions. [2021-12-22 13:57:20,733 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 364 transitions. Word has length 111 [2021-12-22 13:57:20,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:57:20,733 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 364 transitions. [2021-12-22 13:57:20,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 5.444444444444445) internal successors, (147), 25 states have internal predecessors, (147), 10 states have call successors, (27), 6 states have call predecessors, (27), 7 states have return successors, (23), 9 states have call predecessors, (23), 10 states have call successors, (23) [2021-12-22 13:57:20,734 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 364 transitions. [2021-12-22 13:57:20,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-22 13:57:20,735 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:57:20,735 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:57:20,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-22 13:57:20,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-22 13:57:20,949 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:57:20,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:57:20,949 INFO L85 PathProgramCache]: Analyzing trace with hash -155829576, now seen corresponding path program 1 times [2021-12-22 13:57:20,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:57:20,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104521435] [2021-12-22 13:57:20,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:57:20,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:57:21,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:21,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 13:57:21,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:21,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:57:21,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:21,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 13:57:21,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:21,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 13:57:21,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:21,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:57:21,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:21,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 13:57:21,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:21,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-22 13:57:21,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:21,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-22 13:57:21,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:21,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-22 13:57:21,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:21,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-22 13:57:21,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:21,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-22 13:57:21,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:21,677 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 14 proven. 29 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-22 13:57:21,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:57:21,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104521435] [2021-12-22 13:57:21,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104521435] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:57:21,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972635870] [2021-12-22 13:57:21,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:57:21,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:57:21,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:57:21,679 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) [2021-12-22 13:57:21,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-22 13:57:22,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:22,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 2637 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-22 13:57:22,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:57:22,174 INFO L387 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 [2021-12-22 13:57:22,716 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 58 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-22 13:57:22,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:57:23,139 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 30 proven. 14 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-22 13:57:23,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972635870] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:57:23,140 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:57:23,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 9] total 31 [2021-12-22 13:57:23,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502257755] [2021-12-22 13:57:23,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:57:23,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-22 13:57:23,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:57:23,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-22 13:57:23,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-12-22 13:57:23,143 INFO L87 Difference]: Start difference. First operand 273 states and 364 transitions. Second operand has 31 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 28 states have internal predecessors, (144), 9 states have call successors, (31), 6 states have call predecessors, (31), 7 states have return successors, (27), 7 states have call predecessors, (27), 8 states have call successors, (27) [2021-12-22 13:57:25,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:57:25,809 INFO L93 Difference]: Finished difference Result 492 states and 651 transitions. [2021-12-22 13:57:25,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-22 13:57:25,810 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 28 states have internal predecessors, (144), 9 states have call successors, (31), 6 states have call predecessors, (31), 7 states have return successors, (27), 7 states have call predecessors, (27), 8 states have call successors, (27) Word has length 111 [2021-12-22 13:57:25,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:57:25,812 INFO L225 Difference]: With dead ends: 492 [2021-12-22 13:57:25,812 INFO L226 Difference]: Without dead ends: 328 [2021-12-22 13:57:25,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 236 SyntacticMatches, 6 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 825 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=396, Invalid=2684, Unknown=0, NotChecked=0, Total=3080 [2021-12-22 13:57:25,814 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 351 mSDsluCounter, 1096 mSDsCounter, 0 mSdLazyCounter, 2078 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 1283 SdHoareTripleChecker+Invalid, 2585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 2078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 387 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-22 13:57:25,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 1283 Invalid, 2585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 2078 Invalid, 0 Unknown, 387 Unchecked, 1.7s Time] [2021-12-22 13:57:25,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-12-22 13:57:25,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 315. [2021-12-22 13:57:25,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 225 states have (on average 1.1555555555555554) internal successors, (260), 230 states have internal predecessors, (260), 65 states have call successors, (65), 21 states have call predecessors, (65), 24 states have return successors, (91), 63 states have call predecessors, (91), 64 states have call successors, (91) [2021-12-22 13:57:25,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 416 transitions. [2021-12-22 13:57:25,833 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 416 transitions. Word has length 111 [2021-12-22 13:57:25,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:57:25,833 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 416 transitions. [2021-12-22 13:57:25,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 28 states have internal predecessors, (144), 9 states have call successors, (31), 6 states have call predecessors, (31), 7 states have return successors, (27), 7 states have call predecessors, (27), 8 states have call successors, (27) [2021-12-22 13:57:25,834 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 416 transitions. [2021-12-22 13:57:25,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-22 13:57:25,847 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:57:25,853 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:57:25,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-22 13:57:26,074 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,SelfDestructingSolverStorable13 [2021-12-22 13:57:26,074 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:57:26,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:57:26,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1012760702, now seen corresponding path program 1 times [2021-12-22 13:57:26,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:57:26,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801049332] [2021-12-22 13:57:26,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:57:26,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:57:26,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:26,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 13:57:26,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:26,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:57:26,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:26,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 13:57:26,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:26,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 13:57:26,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:26,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:57:26,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:26,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 13:57:26,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:26,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-22 13:57:26,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:26,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-22 13:57:26,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:26,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-22 13:57:26,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:26,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-22 13:57:26,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:26,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-22 13:57:26,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:26,448 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 30 proven. 7 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-22 13:57:26,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:57:26,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801049332] [2021-12-22 13:57:26,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801049332] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:57:26,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715596465] [2021-12-22 13:57:26,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:57:26,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:57:26,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:57:26,451 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) [2021-12-22 13:57:26,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-22 13:57:26,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:26,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 2634 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-22 13:57:26,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:57:26,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 13:57:27,733 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 47 proven. 23 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-22 13:57:27,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:57:28,636 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 14 proven. 30 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-22 13:57:28,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715596465] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:57:28,636 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:57:28,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 14] total 37 [2021-12-22 13:57:28,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207621924] [2021-12-22 13:57:28,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:57:28,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-22 13:57:28,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:57:28,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-22 13:57:28,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1185, Unknown=0, NotChecked=0, Total=1332 [2021-12-22 13:57:28,638 INFO L87 Difference]: Start difference. First operand 315 states and 416 transitions. Second operand has 37 states, 37 states have (on average 4.1891891891891895) internal successors, (155), 34 states have internal predecessors, (155), 9 states have call successors, (30), 6 states have call predecessors, (30), 7 states have return successors, (25), 9 states have call predecessors, (25), 8 states have call successors, (25) [2021-12-22 13:57:31,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:57:31,035 INFO L93 Difference]: Finished difference Result 572 states and 781 transitions. [2021-12-22 13:57:31,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-22 13:57:31,036 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.1891891891891895) internal successors, (155), 34 states have internal predecessors, (155), 9 states have call successors, (30), 6 states have call predecessors, (30), 7 states have return successors, (25), 9 states have call predecessors, (25), 8 states have call successors, (25) Word has length 111 [2021-12-22 13:57:31,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:57:31,038 INFO L225 Difference]: With dead ends: 572 [2021-12-22 13:57:31,039 INFO L226 Difference]: Without dead ends: 427 [2021-12-22 13:57:31,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 218 SyntacticMatches, 10 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1250 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=560, Invalid=3862, Unknown=0, NotChecked=0, Total=4422 [2021-12-22 13:57:31,041 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 254 mSDsluCounter, 1751 mSDsCounter, 0 mSdLazyCounter, 1322 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 1970 SdHoareTripleChecker+Invalid, 1831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 413 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:57:31,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 1970 Invalid, 1831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1322 Invalid, 0 Unknown, 413 Unchecked, 1.2s Time] [2021-12-22 13:57:31,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-12-22 13:57:31,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 352. [2021-12-22 13:57:31,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 255 states have (on average 1.1529411764705881) internal successors, (294), 262 states have internal predecessors, (294), 69 states have call successors, (69), 23 states have call predecessors, (69), 27 states have return successors, (103), 66 states have call predecessors, (103), 68 states have call successors, (103) [2021-12-22 13:57:31,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 466 transitions. [2021-12-22 13:57:31,062 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 466 transitions. Word has length 111 [2021-12-22 13:57:31,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:57:31,062 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 466 transitions. [2021-12-22 13:57:31,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.1891891891891895) internal successors, (155), 34 states have internal predecessors, (155), 9 states have call successors, (30), 6 states have call predecessors, (30), 7 states have return successors, (25), 9 states have call predecessors, (25), 8 states have call successors, (25) [2021-12-22 13:57:31,063 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 466 transitions. [2021-12-22 13:57:31,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-22 13:57:31,064 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:57:31,064 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:57:31,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-22 13:57:31,283 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,SelfDestructingSolverStorable14 [2021-12-22 13:57:31,283 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:57:31,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:57:31,284 INFO L85 PathProgramCache]: Analyzing trace with hash 778299966, now seen corresponding path program 1 times [2021-12-22 13:57:31,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:57:31,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266270131] [2021-12-22 13:57:31,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:57:31,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:57:31,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:31,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 13:57:31,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:31,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:57:31,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:31,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 13:57:31,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:31,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 13:57:31,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:31,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:57:31,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:31,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 13:57:31,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:31,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-22 13:57:31,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:31,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-22 13:57:31,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:31,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-22 13:57:31,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:31,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-22 13:57:31,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:31,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-22 13:57:31,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:31,461 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-22 13:57:31,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:57:31,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266270131] [2021-12-22 13:57:31,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266270131] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:57:31,462 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:57:31,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:57:31,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392100366] [2021-12-22 13:57:31,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:57:31,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:57:31,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:57:31,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:57:31,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:57:31,463 INFO L87 Difference]: Start difference. First operand 352 states and 466 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-22 13:57:31,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:57:31,808 INFO L93 Difference]: Finished difference Result 503 states and 669 transitions. [2021-12-22 13:57:31,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 13:57:31,808 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (12), 3 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 111 [2021-12-22 13:57:31,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:57:31,810 INFO L225 Difference]: With dead ends: 503 [2021-12-22 13:57:31,810 INFO L226 Difference]: Without dead ends: 343 [2021-12-22 13:57:31,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:57:31,811 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 92 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 13:57:31,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 362 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 13:57:31,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-12-22 13:57:31,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2021-12-22 13:57:31,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 247 states have (on average 1.145748987854251) internal successors, (283), 253 states have internal predecessors, (283), 69 states have call successors, (69), 23 states have call predecessors, (69), 26 states have return successors, (94), 66 states have call predecessors, (94), 68 states have call successors, (94) [2021-12-22 13:57:31,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 446 transitions. [2021-12-22 13:57:31,833 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 446 transitions. Word has length 111 [2021-12-22 13:57:31,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:57:31,833 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 446 transitions. [2021-12-22 13:57:31,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-22 13:57:31,833 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 446 transitions. [2021-12-22 13:57:31,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-22 13:57:31,834 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:57:31,835 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:57:31,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-22 13:57:31,835 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:57:31,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:57:31,835 INFO L85 PathProgramCache]: Analyzing trace with hash 2019870094, now seen corresponding path program 1 times [2021-12-22 13:57:31,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:57:31,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782907917] [2021-12-22 13:57:31,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:57:31,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:57:31,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:32,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 13:57:32,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:32,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:57:32,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:32,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 13:57:32,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:32,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 13:57:32,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:32,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:57:32,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:32,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 13:57:32,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:32,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-22 13:57:32,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:32,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-22 13:57:32,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:32,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-22 13:57:32,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:32,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-22 13:57:32,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:32,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-22 13:57:32,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:32,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-22 13:57:32,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:32,221 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-22 13:57:32,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:57:32,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782907917] [2021-12-22 13:57:32,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782907917] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:57:32,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121533767] [2021-12-22 13:57:32,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:57:32,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:57:32,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:57:32,222 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) [2021-12-22 13:57:32,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-22 13:57:32,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:57:32,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 2673 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-22 13:57:32,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:57:32,595 INFO L387 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 [2021-12-22 13:57:32,689 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 13:57:32,689 INFO L387 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 18 [2021-12-22 13:57:32,794 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 13:57:32,795 INFO L387 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 16 treesize of output 22 [2021-12-22 13:57:35,375 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-12-22 13:57:35,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 24 treesize of output 34 [2021-12-22 13:57:35,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-22 13:57:37,539 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-22 13:57:46,382 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 42 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-22 13:57:46,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:57:46,712 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_954 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_save_byte_from_array_~storage#1.base| v_ArrVal_954) |c_ULTIMATE.start_aws_byte_buf_write_harness_~#buf~3#1.base|) |c_ULTIMATE.start_aws_byte_buf_write_harness_~#buf~3#1.offset|) 18446744073709551616) 0))) is different from false [2021-12-22 13:57:46,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121533767] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:57:46,719 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 13:57:46,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23] total 38 [2021-12-22 13:57:46,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179614041] [2021-12-22 13:57:46,720 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 13:57:46,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-22 13:57:46,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:57:46,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-22 13:57:46,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1749, Unknown=3, NotChecked=84, Total=1980 [2021-12-22 13:57:46,721 INFO L87 Difference]: Start difference. First operand 343 states and 446 transitions. Second operand has 38 states, 35 states have (on average 3.742857142857143) internal successors, (131), 32 states have internal predecessors, (131), 14 states have call successors, (26), 9 states have call predecessors, (26), 10 states have return successors, (23), 11 states have call predecessors, (23), 13 states have call successors, (23)