./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_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 376fa3967c5a16dbeae94f1517cf176a2f53d2660c6b5c3d2eeb4fd9f827337c --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 03:17:03,836 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 03:17:03,839 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 03:17:03,881 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 03:17:03,882 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 03:17:03,886 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 03:17:03,888 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 03:17:03,891 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 03:17:03,893 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 03:17:03,898 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 03:17:03,898 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 03:17:03,900 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 03:17:03,901 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 03:17:03,904 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 03:17:03,906 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 03:17:03,909 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 03:17:03,910 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 03:17:03,910 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 03:17:03,914 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 03:17:03,917 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 03:17:03,920 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 03:17:03,923 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 03:17:03,924 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 03:17:03,925 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 03:17:03,927 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 03:17:03,929 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 03:17:03,929 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 03:17:03,930 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 03:17:03,931 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 03:17:03,932 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 03:17:03,932 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 03:17:03,933 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 03:17:03,934 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 03:17:03,935 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 03:17:03,936 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 03:17:03,936 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 03:17:03,937 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 03:17:03,937 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 03:17:03,937 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 03:17:03,938 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 03:17:03,938 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 03:17:03,939 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-16 03:17:03,965 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 03:17:03,965 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 03:17:03,965 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 03:17:03,965 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 03:17:03,966 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 03:17:03,966 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 03:17:03,966 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 03:17:03,967 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 03:17:03,967 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 03:17:03,967 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 03:17:03,967 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 03:17:03,967 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 03:17:03,967 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 03:17:03,967 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 03:17:03,967 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 03:17:03,967 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 03:17:03,967 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 03:17:03,968 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 03:17:03,968 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 03:17:03,968 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 03:17:03,968 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 03:17:03,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 03:17:03,968 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 03:17:03,968 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 03:17:03,968 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 03:17:03,968 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 03:17:03,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 03:17:03,969 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 03:17:03,969 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 03:17:03,969 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 03:17:03,969 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 03:17:03,969 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 376fa3967c5a16dbeae94f1517cf176a2f53d2660c6b5c3d2eeb4fd9f827337c [2021-12-16 03:17:04,173 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 03:17:04,191 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 03:17:04,194 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 03:17:04,195 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 03:17:04,196 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 03:17:04,197 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_harness.i [2021-12-16 03:17:04,245 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56be45ba4/c2a4074ed8cb4d98a5696f6b374778b3/FLAG81cb77697 [2021-12-16 03:17:04,895 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 03:17:04,896 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_harness.i [2021-12-16 03:17:04,923 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56be45ba4/c2a4074ed8cb4d98a5696f6b374778b3/FLAG81cb77697 [2021-12-16 03:17:04,989 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56be45ba4/c2a4074ed8cb4d98a5696f6b374778b3 [2021-12-16 03:17:04,990 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 03:17:04,992 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 03:17:04,992 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 03:17:04,992 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 03:17:04,995 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 03:17:04,995 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 03:17:04" (1/1) ... [2021-12-16 03:17:04,996 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64bb6cae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:17:04, skipping insertion in model container [2021-12-16 03:17:04,996 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 03:17:04" (1/1) ... [2021-12-16 03:17:05,000 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 03:17:05,064 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 03:17:05,282 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_harness.i[4492,4505] [2021-12-16 03:17:05,288 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_harness.i[4552,4565] [2021-12-16 03:17:05,927 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:17:05,928 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:17:05,929 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:17:05,930 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:17:05,931 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:17:05,938 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:17:05,939 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:17:05,942 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:17:05,943 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:17:06,181 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-16 03:17:06,182 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-16 03:17:06,183 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-16 03:17:06,184 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-16 03:17:06,187 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-16 03:17:06,188 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-16 03:17:06,188 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-16 03:17:06,188 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-16 03:17:06,189 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-16 03:17:06,189 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-16 03:17:06,347 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-16 03:17:06,441 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:17:06,442 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:17:06,568 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 03:17:06,629 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 03:17:06,652 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_harness.i[4492,4505] [2021-12-16 03:17:06,653 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_harness.i[4552,4565] [2021-12-16 03:17:06,678 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:17:06,681 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:17:06,682 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:17:06,683 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:17:06,683 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:17:06,687 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:17:06,688 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:17:06,689 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:17:06,689 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:17:06,719 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-16 03:17:06,720 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-16 03:17:06,720 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-16 03:17:06,721 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-16 03:17:06,722 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-16 03:17:06,722 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-16 03:17:06,723 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-16 03:17:06,723 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-16 03:17:06,724 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-16 03:17:06,724 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-16 03:17:06,742 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-16 03:17:06,787 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:17:06,788 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:17:06,811 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 03:17:06,947 INFO L208 MainTranslator]: Completed translation [2021-12-16 03:17:06,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:17:06 WrapperNode [2021-12-16 03:17:06,947 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 03:17:06,948 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 03:17:06,948 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 03:17:06,948 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 03:17:06,953 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:17:06" (1/1) ... [2021-12-16 03:17:07,027 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:17:06" (1/1) ... [2021-12-16 03:17:07,098 INFO L137 Inliner]: procedures = 691, calls = 2650, calls flagged for inlining = 60, calls inlined = 6, statements flattened = 873 [2021-12-16 03:17:07,098 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 03:17:07,099 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 03:17:07,099 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 03:17:07,099 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 03:17:07,105 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:17:06" (1/1) ... [2021-12-16 03:17:07,105 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:17:06" (1/1) ... [2021-12-16 03:17:07,115 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:17:06" (1/1) ... [2021-12-16 03:17:07,116 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:17:06" (1/1) ... [2021-12-16 03:17:07,155 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:17:06" (1/1) ... [2021-12-16 03:17:07,194 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:17:06" (1/1) ... [2021-12-16 03:17:07,198 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:17:06" (1/1) ... [2021-12-16 03:17:07,210 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 03:17:07,214 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 03:17:07,216 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 03:17:07,216 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 03:17:07,217 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:17:06" (1/1) ... [2021-12-16 03:17:07,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 03:17:07,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:17:07,240 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) [2021-12-16 03:17:07,271 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2021-12-16 03:17:07,271 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2021-12-16 03:17:07,271 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-12-16 03:17:07,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 03:17:07,271 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-16 03:17:07,272 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-16 03:17:07,272 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 03:17:07,272 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_bounded [2021-12-16 03:17:07,272 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_bounded [2021-12-16 03:17:07,272 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-16 03:17:07,273 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-16 03:17:07,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-16 03:17:07,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 03:17:07,274 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_array [2021-12-16 03:17:07,274 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_array [2021-12-16 03:17:07,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-16 03:17:07,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 03:17:07,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 03:17:07,275 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-16 03:17:07,275 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-16 03:17:07,258 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 [2021-12-16 03:17:07,275 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-12-16 03:17:07,276 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-12-16 03:17:07,276 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-16 03:17:07,276 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-16 03:17:07,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 03:17:07,276 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-16 03:17:07,276 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_eq [2021-12-16 03:17:07,276 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_eq [2021-12-16 03:17:07,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-16 03:17:07,276 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-12-16 03:17:07,276 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-12-16 03:17:07,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 03:17:07,276 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_byte_cursor_has_allocated_buffer_member [2021-12-16 03:17:07,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_byte_cursor_has_allocated_buffer_member [2021-12-16 03:17:07,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 03:17:07,538 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 03:17:07,541 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 03:17:08,044 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 03:17:08,051 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 03:17:08,054 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-16 03:17:08,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 03:17:08 BoogieIcfgContainer [2021-12-16 03:17:08,057 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 03:17:08,058 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 03:17:08,058 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 03:17:08,061 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 03:17:08,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 03:17:04" (1/3) ... [2021-12-16 03:17:08,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@765c4433 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 03:17:08, skipping insertion in model container [2021-12-16 03:17:08,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:17:06" (2/3) ... [2021-12-16 03:17:08,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@765c4433 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 03:17:08, skipping insertion in model container [2021-12-16 03:17:08,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 03:17:08" (3/3) ... [2021-12-16 03:17:08,064 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_cursor_eq_harness.i [2021-12-16 03:17:08,068 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 03:17:08,068 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 03:17:08,117 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 03:17:08,125 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 [2021-12-16 03:17:08,125 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 03:17:08,149 INFO L276 IsEmpty]: Start isEmpty. Operand has 134 states, 81 states have (on average 1.2345679012345678) internal successors, (100), 82 states have internal predecessors, (100), 40 states have call successors, (40), 11 states have call predecessors, (40), 11 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2021-12-16 03:17:08,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-16 03:17:08,162 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:17:08,163 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:17:08,163 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:17:08,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:17:08,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1846687754, now seen corresponding path program 1 times [2021-12-16 03:17:08,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:17:08,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212366686] [2021-12-16 03:17:08,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:17:08,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:17:08,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:08,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:17:08,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:08,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:17:08,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:08,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 03:17:08,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:08,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:17:08,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:08,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-16 03:17:08,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:08,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-16 03:17:08,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:08,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-16 03:17:08,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:08,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-16 03:17:08,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:08,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-16 03:17:08,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:08,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-16 03:17:08,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:08,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-16 03:17:08,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:08,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-16 03:17:08,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:08,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-16 03:17:08,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:08,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-16 03:17:08,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:08,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:17:08,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:08,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:17:08,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:08,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-16 03:17:08,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:08,846 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-12-16 03:17:08,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:17:08,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212366686] [2021-12-16 03:17:08,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212366686] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:17:08,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:17:08,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 03:17:08,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997519302] [2021-12-16 03:17:08,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:17:08,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 03:17:08,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:17:08,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 03:17:08,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 03:17:08,880 INFO L87 Difference]: Start difference. First operand has 134 states, 81 states have (on average 1.2345679012345678) internal successors, (100), 82 states have internal predecessors, (100), 40 states have call successors, (40), 11 states have call predecessors, (40), 11 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-16 03:17:09,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:17:09,187 INFO L93 Difference]: Finished difference Result 267 states and 385 transitions. [2021-12-16 03:17:09,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 03:17:09,190 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 102 [2021-12-16 03:17:09,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:17:09,196 INFO L225 Difference]: With dead ends: 267 [2021-12-16 03:17:09,196 INFO L226 Difference]: Without dead ends: 131 [2021-12-16 03:17:09,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 03:17:09,202 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 102 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 03:17:09,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 196 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 03:17:09,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-16 03:17:09,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 128. [2021-12-16 03:17:09,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 76 states have (on average 1.2105263157894737) internal successors, (92), 77 states have internal predecessors, (92), 40 states have call successors, (40), 11 states have call predecessors, (40), 11 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2021-12-16 03:17:09,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 171 transitions. [2021-12-16 03:17:09,236 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 171 transitions. Word has length 102 [2021-12-16 03:17:09,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:17:09,236 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 171 transitions. [2021-12-16 03:17:09,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-16 03:17:09,237 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 171 transitions. [2021-12-16 03:17:09,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-16 03:17:09,239 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:17:09,239 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:17:09,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 03:17:09,239 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:17:09,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:17:09,240 INFO L85 PathProgramCache]: Analyzing trace with hash -192509010, now seen corresponding path program 1 times [2021-12-16 03:17:09,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:17:09,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903073092] [2021-12-16 03:17:09,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:17:09,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:17:09,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:09,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:17:09,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:09,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:17:09,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:09,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 03:17:09,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:09,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:17:09,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:09,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-16 03:17:09,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:09,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-16 03:17:09,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:09,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-16 03:17:09,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:09,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-16 03:17:09,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:09,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-16 03:17:09,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:09,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-16 03:17:09,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:09,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-16 03:17:09,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:09,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-16 03:17:09,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:09,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-16 03:17:09,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:09,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-16 03:17:09,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:09,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:17:09,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:09,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:17:09,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:09,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-16 03:17:09,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:09,523 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-16 03:17:09,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:17:09,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903073092] [2021-12-16 03:17:09,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903073092] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:17:09,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22536587] [2021-12-16 03:17:09,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:17:09,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:17:09,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:17:09,525 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) [2021-12-16 03:17:09,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 03:17:09,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:09,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 2662 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 03:17:09,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:17:10,175 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-16 03:17:10,175 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:17:10,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22536587] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:17:10,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:17:10,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2021-12-16 03:17:10,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151133787] [2021-12-16 03:17:10,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:17:10,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 03:17:10,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:17:10,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 03:17:10,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-16 03:17:10,178 INFO L87 Difference]: Start difference. First operand 128 states and 171 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-12-16 03:17:10,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:17:10,338 INFO L93 Difference]: Finished difference Result 252 states and 341 transitions. [2021-12-16 03:17:10,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 03:17:10,338 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 102 [2021-12-16 03:17:10,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:17:10,355 INFO L225 Difference]: With dead ends: 252 [2021-12-16 03:17:10,356 INFO L226 Difference]: Without dead ends: 131 [2021-12-16 03:17:10,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-12-16 03:17:10,357 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 186 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 03:17:10,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 343 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 03:17:10,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-16 03:17:10,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-12-16 03:17:10,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 78 states have (on average 1.205128205128205) internal successors, (94), 80 states have internal predecessors, (94), 40 states have call successors, (40), 11 states have call predecessors, (40), 12 states have return successors, (45), 39 states have call predecessors, (45), 39 states have call successors, (45) [2021-12-16 03:17:10,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 179 transitions. [2021-12-16 03:17:10,368 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 179 transitions. Word has length 102 [2021-12-16 03:17:10,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:17:10,369 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 179 transitions. [2021-12-16 03:17:10,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-12-16 03:17:10,372 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 179 transitions. [2021-12-16 03:17:10,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-16 03:17:10,376 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:17:10,377 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:17:10,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 03:17:10,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:17:10,597 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:17:10,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:17:10,597 INFO L85 PathProgramCache]: Analyzing trace with hash -49851437, now seen corresponding path program 1 times [2021-12-16 03:17:10,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:17:10,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172665824] [2021-12-16 03:17:10,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:17:10,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:17:10,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:10,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:17:10,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:10,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:17:10,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:10,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 03:17:10,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:10,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:17:10,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:10,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-16 03:17:10,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:10,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-16 03:17:10,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:10,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-16 03:17:10,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:10,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 03:17:10,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:10,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-16 03:17:10,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:10,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 03:17:10,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:10,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-16 03:17:10,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:10,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-16 03:17:10,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:10,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-16 03:17:10,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:10,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-16 03:17:10,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:10,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:17:10,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:10,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:17:10,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:10,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-16 03:17:10,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:10,944 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-12-16 03:17:10,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:17:10,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172665824] [2021-12-16 03:17:10,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172665824] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:17:10,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128516793] [2021-12-16 03:17:10,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:17:10,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:17:10,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:17:10,946 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) [2021-12-16 03:17:10,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 03:17:11,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:11,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 2667 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 03:17:11,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:17:11,515 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-16 03:17:11,515 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:17:11,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128516793] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:17:11,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:17:11,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 16 [2021-12-16 03:17:11,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102750430] [2021-12-16 03:17:11,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:17:11,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 03:17:11,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:17:11,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 03:17:11,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-12-16 03:17:11,517 INFO L87 Difference]: Start difference. First operand 131 states and 179 transitions. Second operand has 7 states, 6 states have (on average 8.0) internal successors, (48), 7 states have internal predecessors, (48), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 4 states have call successors, (17) [2021-12-16 03:17:11,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:17:11,718 INFO L93 Difference]: Finished difference Result 212 states and 290 transitions. [2021-12-16 03:17:11,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 03:17:11,718 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.0) internal successors, (48), 7 states have internal predecessors, (48), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 4 states have call successors, (17) Word has length 104 [2021-12-16 03:17:11,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:17:11,720 INFO L225 Difference]: With dead ends: 212 [2021-12-16 03:17:11,720 INFO L226 Difference]: Without dead ends: 131 [2021-12-16 03:17:11,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-12-16 03:17:11,721 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 206 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 03:17:11,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 553 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 03:17:11,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-16 03:17:11,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-12-16 03:17:11,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 78 states have (on average 1.205128205128205) internal successors, (94), 80 states have internal predecessors, (94), 40 states have call successors, (40), 11 states have call predecessors, (40), 12 states have return successors, (43), 39 states have call predecessors, (43), 39 states have call successors, (43) [2021-12-16 03:17:11,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 177 transitions. [2021-12-16 03:17:11,730 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 177 transitions. Word has length 104 [2021-12-16 03:17:11,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:17:11,730 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 177 transitions. [2021-12-16 03:17:11,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.0) internal successors, (48), 7 states have internal predecessors, (48), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 4 states have call successors, (17) [2021-12-16 03:17:11,731 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 177 transitions. [2021-12-16 03:17:11,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-16 03:17:11,732 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:17:11,732 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:17:11,769 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-16 03:17:11,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-16 03:17:11,950 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:17:11,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:17:11,951 INFO L85 PathProgramCache]: Analyzing trace with hash 160212765, now seen corresponding path program 2 times [2021-12-16 03:17:11,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:17:11,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400892363] [2021-12-16 03:17:11,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:17:11,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:17:11,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:12,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:17:12,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:12,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:17:12,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:12,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 03:17:12,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:12,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:17:12,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:12,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-16 03:17:12,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:12,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-16 03:17:12,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:12,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-16 03:17:12,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:12,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 03:17:12,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:12,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-16 03:17:12,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:12,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 03:17:12,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:12,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-16 03:17:12,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:12,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-16 03:17:12,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:12,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-16 03:17:12,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:12,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-16 03:17:12,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:12,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:17:12,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:12,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:17:12,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:12,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-16 03:17:12,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:12,232 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-16 03:17:12,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:17:12,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400892363] [2021-12-16 03:17:12,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400892363] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:17:12,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116814311] [2021-12-16 03:17:12,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 03:17:12,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:17:12,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:17:12,234 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) [2021-12-16 03:17:12,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 03:17:12,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-16 03:17:12,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:17:12,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 2314 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-16 03:17:12,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:17:12,775 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-12-16 03:17:12,775 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:17:12,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116814311] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:17:12,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:17:12,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2021-12-16 03:17:12,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863668676] [2021-12-16 03:17:12,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:17:12,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 03:17:12,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:17:12,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 03:17:12,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-12-16 03:17:12,777 INFO L87 Difference]: Start difference. First operand 131 states and 177 transitions. Second operand has 8 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) [2021-12-16 03:17:12,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:17:12,857 INFO L93 Difference]: Finished difference Result 143 states and 196 transitions. [2021-12-16 03:17:12,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 03:17:12,857 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) Word has length 108 [2021-12-16 03:17:12,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:17:12,859 INFO L225 Difference]: With dead ends: 143 [2021-12-16 03:17:12,859 INFO L226 Difference]: Without dead ends: 141 [2021-12-16 03:17:12,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-12-16 03:17:12,860 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 16 mSDsluCounter, 1006 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 1179 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 03:17:12,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 1179 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 03:17:12,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-12-16 03:17:12,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2021-12-16 03:17:12,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 84 states have (on average 1.1904761904761905) internal successors, (100), 87 states have internal predecessors, (100), 41 states have call successors, (41), 12 states have call predecessors, (41), 14 states have return successors, (52), 40 states have call predecessors, (52), 40 states have call successors, (52) [2021-12-16 03:17:12,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 193 transitions. [2021-12-16 03:17:12,884 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 193 transitions. Word has length 108 [2021-12-16 03:17:12,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:17:12,884 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 193 transitions. [2021-12-16 03:17:12,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) [2021-12-16 03:17:12,885 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 193 transitions. [2021-12-16 03:17:12,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-16 03:17:12,886 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:17:12,886 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:17:12,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 03:17:13,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:17:13,108 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:17:13,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:17:13,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1574940187, now seen corresponding path program 1 times [2021-12-16 03:17:13,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:17:13,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517561092] [2021-12-16 03:17:13,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:17:13,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:17:13,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:13,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:17:13,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:13,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:17:13,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:13,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 03:17:13,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:13,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:17:13,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:13,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-16 03:17:13,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:13,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-16 03:17:13,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:13,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-16 03:17:13,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:13,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 03:17:13,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:13,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-16 03:17:13,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:13,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 03:17:13,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:13,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-16 03:17:13,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:13,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-16 03:17:13,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:13,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-16 03:17:13,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:13,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-16 03:17:13,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:13,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:17:13,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:13,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:17:13,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:13,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-16 03:17:13,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:13,481 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-16 03:17:13,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:17:13,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517561092] [2021-12-16 03:17:13,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517561092] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:17:13,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799846852] [2021-12-16 03:17:13,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:17:13,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:17:13,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:17:13,496 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) [2021-12-16 03:17:13,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 03:17:13,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:13,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 2689 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 03:17:13,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:17:14,140 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-16 03:17:14,141 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:17:14,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799846852] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:17:14,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:17:14,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2021-12-16 03:17:14,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574994287] [2021-12-16 03:17:14,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:17:14,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 03:17:14,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:17:14,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 03:17:14,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-12-16 03:17:14,143 INFO L87 Difference]: Start difference. First operand 140 states and 193 transitions. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-12-16 03:17:14,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:17:14,317 INFO L93 Difference]: Finished difference Result 245 states and 337 transitions. [2021-12-16 03:17:14,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 03:17:14,317 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 112 [2021-12-16 03:17:14,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:17:14,319 INFO L225 Difference]: With dead ends: 245 [2021-12-16 03:17:14,319 INFO L226 Difference]: Without dead ends: 137 [2021-12-16 03:17:14,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-12-16 03:17:14,322 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 205 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 03:17:14,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 556 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 03:17:14,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-12-16 03:17:14,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-12-16 03:17:14,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 82 states have (on average 1.1829268292682926) internal successors, (97), 84 states have internal predecessors, (97), 41 states have call successors, (41), 12 states have call predecessors, (41), 13 states have return successors, (48), 40 states have call predecessors, (48), 40 states have call successors, (48) [2021-12-16 03:17:14,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 186 transitions. [2021-12-16 03:17:14,339 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 186 transitions. Word has length 112 [2021-12-16 03:17:14,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:17:14,339 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 186 transitions. [2021-12-16 03:17:14,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-12-16 03:17:14,340 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 186 transitions. [2021-12-16 03:17:14,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-16 03:17:14,340 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:17:14,341 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:17:14,363 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-16 03:17:14,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:17:14,561 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:17:14,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:17:14,561 INFO L85 PathProgramCache]: Analyzing trace with hash 660367434, now seen corresponding path program 1 times [2021-12-16 03:17:14,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:17:14,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088560371] [2021-12-16 03:17:14,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:17:14,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:17:14,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:14,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:17:14,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:14,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:17:14,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:14,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 03:17:14,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:14,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:17:14,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:14,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-16 03:17:14,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:14,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-16 03:17:14,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:14,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-16 03:17:14,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:14,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 03:17:14,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:14,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-16 03:17:14,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:14,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 03:17:14,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:14,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-16 03:17:14,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:14,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-16 03:17:14,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:14,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-16 03:17:14,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:14,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-16 03:17:14,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:15,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:17:15,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:15,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:17:15,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:15,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-16 03:17:15,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:15,136 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-16 03:17:15,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:17:15,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088560371] [2021-12-16 03:17:15,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088560371] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:17:15,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972466818] [2021-12-16 03:17:15,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:17:15,137 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:17:15,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:17:15,152 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) [2021-12-16 03:17:15,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 03:17:15,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:15,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 2694 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-16 03:17:15,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:17:15,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-16 03:17:15,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 03:17:16,060 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-16 03:17:16,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 35 [2021-12-16 03:17:25,590 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 56 proven. 16 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-16 03:17:25,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:17:36,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972466818] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:17:36,913 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 03:17:36,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 26 [2021-12-16 03:17:36,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742222749] [2021-12-16 03:17:36,913 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 03:17:36,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-16 03:17:36,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:17:36,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-16 03:17:36,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=874, Unknown=7, NotChecked=0, Total=992 [2021-12-16 03:17:36,915 INFO L87 Difference]: Start difference. First operand 137 states and 186 transitions. Second operand has 26 states, 24 states have (on average 3.875) internal successors, (93), 22 states have internal predecessors, (93), 13 states have call successors, (35), 7 states have call predecessors, (35), 7 states have return successors, (34), 12 states have call predecessors, (34), 13 states have call successors, (34) [2021-12-16 03:17:40,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:17:40,774 INFO L93 Difference]: Finished difference Result 358 states and 499 transitions. [2021-12-16 03:17:40,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-16 03:17:40,775 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 3.875) internal successors, (93), 22 states have internal predecessors, (93), 13 states have call successors, (35), 7 states have call predecessors, (35), 7 states have return successors, (34), 12 states have call predecessors, (34), 13 states have call successors, (34) Word has length 114 [2021-12-16 03:17:40,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:17:40,777 INFO L225 Difference]: With dead ends: 358 [2021-12-16 03:17:40,777 INFO L226 Difference]: Without dead ends: 284 [2021-12-16 03:17:40,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 194 SyntacticMatches, 17 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 22.4s TimeCoverageRelationStatistics Valid=229, Invalid=1924, Unknown=9, NotChecked=0, Total=2162 [2021-12-16 03:17:40,780 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 180 mSDsluCounter, 1458 mSDsCounter, 0 mSdLazyCounter, 1241 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 1649 SdHoareTripleChecker+Invalid, 2106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 784 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-16 03:17:40,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 1649 Invalid, 2106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1241 Invalid, 0 Unknown, 784 Unchecked, 1.0s Time] [2021-12-16 03:17:40,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-12-16 03:17:40,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 214. [2021-12-16 03:17:40,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 130 states have (on average 1.1692307692307693) internal successors, (152), 137 states have internal predecessors, (152), 59 states have call successors, (59), 18 states have call predecessors, (59), 24 states have return successors, (78), 58 states have call predecessors, (78), 58 states have call successors, (78) [2021-12-16 03:17:40,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 289 transitions. [2021-12-16 03:17:40,805 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 289 transitions. Word has length 114 [2021-12-16 03:17:40,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:17:40,806 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 289 transitions. [2021-12-16 03:17:40,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 3.875) internal successors, (93), 22 states have internal predecessors, (93), 13 states have call successors, (35), 7 states have call predecessors, (35), 7 states have return successors, (34), 12 states have call predecessors, (34), 13 states have call successors, (34) [2021-12-16 03:17:40,807 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 289 transitions. [2021-12-16 03:17:40,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-16 03:17:40,809 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:17:40,809 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:17:40,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 03:17:41,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:17:41,026 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:17:41,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:17:41,027 INFO L85 PathProgramCache]: Analyzing trace with hash -61653320, now seen corresponding path program 1 times [2021-12-16 03:17:41,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:17:41,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094468925] [2021-12-16 03:17:41,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:17:41,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:17:41,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:41,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:17:41,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:41,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:17:41,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:41,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 03:17:41,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:41,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:17:41,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:41,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-16 03:17:41,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:41,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-16 03:17:41,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:41,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-16 03:17:41,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:41,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 03:17:41,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:41,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-16 03:17:41,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:41,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 03:17:41,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:41,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-16 03:17:41,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:41,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-16 03:17:41,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:41,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-16 03:17:41,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:41,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-16 03:17:41,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:41,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:17:41,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:41,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:17:41,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:41,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-16 03:17:41,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:41,493 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-16 03:17:41,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:17:41,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094468925] [2021-12-16 03:17:41,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094468925] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:17:41,494 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:17:41,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-16 03:17:41,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869728438] [2021-12-16 03:17:41,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:17:41,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-16 03:17:41,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:17:41,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-16 03:17:41,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-12-16 03:17:41,496 INFO L87 Difference]: Start difference. First operand 214 states and 289 transitions. Second operand has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 5 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-12-16 03:17:42,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:17:42,218 INFO L93 Difference]: Finished difference Result 317 states and 435 transitions. [2021-12-16 03:17:42,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 03:17:42,219 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 5 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 115 [2021-12-16 03:17:42,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:17:42,220 INFO L225 Difference]: With dead ends: 317 [2021-12-16 03:17:42,220 INFO L226 Difference]: Without dead ends: 250 [2021-12-16 03:17:42,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-12-16 03:17:42,221 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 166 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-16 03:17:42,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 822 Invalid, 977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 890 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-16 03:17:42,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-12-16 03:17:42,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 218. [2021-12-16 03:17:42,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 132 states have (on average 1.1666666666666667) internal successors, (154), 140 states have internal predecessors, (154), 60 states have call successors, (60), 18 states have call predecessors, (60), 25 states have return successors, (81), 59 states have call predecessors, (81), 59 states have call successors, (81) [2021-12-16 03:17:42,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 295 transitions. [2021-12-16 03:17:42,241 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 295 transitions. Word has length 115 [2021-12-16 03:17:42,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:17:42,243 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 295 transitions. [2021-12-16 03:17:42,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 5 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-12-16 03:17:42,243 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 295 transitions. [2021-12-16 03:17:42,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-16 03:17:42,245 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:17:42,245 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:17:42,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-16 03:17:42,245 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:17:42,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:17:42,246 INFO L85 PathProgramCache]: Analyzing trace with hash -470477545, now seen corresponding path program 1 times [2021-12-16 03:17:42,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:17:42,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440764538] [2021-12-16 03:17:42,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:17:42,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:17:42,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:42,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:17:42,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:42,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:17:42,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:42,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 03:17:42,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:42,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:17:42,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:42,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-16 03:17:42,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:42,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-16 03:17:42,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:42,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-16 03:17:42,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:42,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 03:17:42,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:42,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-16 03:17:42,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:42,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 03:17:42,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:42,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-16 03:17:42,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:42,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-16 03:17:42,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:42,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-16 03:17:42,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:42,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-16 03:17:42,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:42,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:17:42,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:42,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:17:42,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:42,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-16 03:17:42,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:42,609 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-16 03:17:42,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:17:42,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440764538] [2021-12-16 03:17:42,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440764538] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:17:42,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760984596] [2021-12-16 03:17:42,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:17:42,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:17:42,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:17:42,611 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) [2021-12-16 03:17:42,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 03:17:42,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:42,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 2698 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-16 03:17:42,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:17:43,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 03:17:43,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 03:17:43,442 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-16 03:17:43,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 35 [2021-12-16 03:17:43,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-12-16 03:17:44,144 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 38 proven. 36 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-16 03:17:44,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:17:44,193 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger: modulus not positive [2021-12-16 03:17:44,193 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:17:44,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-12-16 03:17:44,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085083145] [2021-12-16 03:17:44,194 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-16 03:17:44,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-16 03:17:44,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:17:44,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-16 03:17:44,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2021-12-16 03:17:44,195 INFO L87 Difference]: Start difference. First operand 218 states and 295 transitions. Second operand has 11 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 5 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-12-16 03:17:44,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:17:44,944 INFO L93 Difference]: Finished difference Result 375 states and 519 transitions. [2021-12-16 03:17:44,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 03:17:44,944 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 5 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 115 [2021-12-16 03:17:44,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:17:44,946 INFO L225 Difference]: With dead ends: 375 [2021-12-16 03:17:44,946 INFO L226 Difference]: Without dead ends: 296 [2021-12-16 03:17:44,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 140 SyntacticMatches, 13 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2021-12-16 03:17:44,947 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 178 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-16 03:17:44,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 637 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 815 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-16 03:17:44,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-12-16 03:17:44,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 264. [2021-12-16 03:17:44,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 164 states have (on average 1.1768292682926829) internal successors, (193), 173 states have internal predecessors, (193), 71 states have call successors, (71), 20 states have call predecessors, (71), 28 states have return successors, (99), 70 states have call predecessors, (99), 70 states have call successors, (99) [2021-12-16 03:17:44,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 363 transitions. [2021-12-16 03:17:44,979 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 363 transitions. Word has length 115 [2021-12-16 03:17:44,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:17:44,979 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 363 transitions. [2021-12-16 03:17:44,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 5 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-12-16 03:17:44,979 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 363 transitions. [2021-12-16 03:17:44,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-16 03:17:44,980 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:17:44,981 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:17:45,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 03:17:45,195 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 [2021-12-16 03:17:45,195 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:17:45,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:17:45,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1104442289, now seen corresponding path program 2 times [2021-12-16 03:17:45,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:17:45,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767523690] [2021-12-16 03:17:45,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:17:45,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:17:45,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:45,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:17:45,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:45,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:17:45,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:45,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 03:17:45,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:45,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:17:45,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:45,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-16 03:17:45,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:45,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-16 03:17:45,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:45,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-16 03:17:45,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:45,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 03:17:45,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:45,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-16 03:17:45,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:45,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 03:17:45,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:45,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-16 03:17:45,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:45,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-16 03:17:45,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:45,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-16 03:17:45,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:45,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-16 03:17:45,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:45,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:17:45,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:45,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:17:45,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:45,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-16 03:17:45,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:45,586 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-16 03:17:45,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:17:45,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767523690] [2021-12-16 03:17:45,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767523690] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:17:45,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345758142] [2021-12-16 03:17:45,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 03:17:45,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:17:45,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:17:45,588 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) [2021-12-16 03:17:45,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 03:17:46,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 03:17:46,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:17:46,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 2710 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-16 03:17:46,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:17:46,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-16 03:17:46,972 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-16 03:17:46,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-12-16 03:17:55,140 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 60 proven. 16 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-16 03:17:55,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:18:10,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345758142] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:18:10,815 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 03:18:10,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 26 [2021-12-16 03:18:10,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912103826] [2021-12-16 03:18:10,815 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 03:18:10,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-16 03:18:10,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:18:10,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-16 03:18:10,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=936, Unknown=8, NotChecked=0, Total=1056 [2021-12-16 03:18:10,817 INFO L87 Difference]: Start difference. First operand 264 states and 363 transitions. Second operand has 26 states, 24 states have (on average 4.333333333333333) internal successors, (104), 22 states have internal predecessors, (104), 9 states have call successors, (34), 7 states have call predecessors, (34), 8 states have return successors, (33), 9 states have call predecessors, (33), 9 states have call successors, (33)