./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_priority_queue_top_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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_priority_queue_top_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 1b920ac3045decc1a5a84e4c4a6d200f349784425219a23e0b9ddb547b7159b4 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 17:08:59,840 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 17:08:59,842 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 17:08:59,872 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 17:08:59,873 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 17:08:59,891 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 17:08:59,892 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 17:08:59,893 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 17:08:59,894 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 17:08:59,895 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 17:08:59,895 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 17:08:59,896 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 17:08:59,896 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 17:08:59,896 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 17:08:59,897 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 17:08:59,898 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 17:08:59,898 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 17:08:59,901 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 17:08:59,903 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 17:08:59,906 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 17:08:59,909 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 17:08:59,913 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 17:08:59,914 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 17:08:59,916 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 17:08:59,918 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 17:08:59,923 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 17:08:59,923 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 17:08:59,924 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 17:08:59,924 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 17:08:59,925 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 17:08:59,925 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 17:08:59,925 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 17:08:59,926 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 17:08:59,926 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 17:08:59,927 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 17:08:59,927 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 17:08:59,928 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 17:08:59,928 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 17:08:59,928 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 17:08:59,929 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 17:08:59,929 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 17:08:59,930 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-14 17:08:59,959 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 17:08:59,959 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 17:08:59,959 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 17:08:59,960 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 17:08:59,960 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 17:08:59,960 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 17:08:59,961 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 17:08:59,961 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 17:08:59,961 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 17:08:59,961 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 17:08:59,961 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 17:08:59,961 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 17:08:59,962 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 17:08:59,962 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 17:08:59,962 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 17:08:59,962 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 17:08:59,962 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 17:08:59,962 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 17:08:59,963 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 17:08:59,963 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 17:08:59,963 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 17:08:59,963 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 17:08:59,963 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 17:08:59,963 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 17:08:59,963 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 17:08:59,964 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 17:08:59,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 17:08:59,964 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 17:08:59,964 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 17:08:59,964 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 17:08:59,964 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 17:08:59,964 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b920ac3045decc1a5a84e4c4a6d200f349784425219a23e0b9ddb547b7159b4 [2021-12-14 17:09:00,154 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 17:09:00,175 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 17:09:00,177 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 17:09:00,178 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 17:09:00,179 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 17:09:00,179 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_priority_queue_top_harness.i [2021-12-14 17:09:00,240 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec65d56da/9104c3ef46c74bbfb0ca24ba6b71568e/FLAG2e85860ec [2021-12-14 17:09:00,754 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 17:09:00,755 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_priority_queue_top_harness.i [2021-12-14 17:09:00,784 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec65d56da/9104c3ef46c74bbfb0ca24ba6b71568e/FLAG2e85860ec [2021-12-14 17:09:00,982 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec65d56da/9104c3ef46c74bbfb0ca24ba6b71568e [2021-12-14 17:09:00,985 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 17:09:00,986 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 17:09:00,989 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 17:09:00,989 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 17:09:00,991 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 17:09:00,992 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:09:00" (1/1) ... [2021-12-14 17:09:00,993 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26229b45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:09:00, skipping insertion in model container [2021-12-14 17:09:00,993 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:09:00" (1/1) ... [2021-12-14 17:09:00,998 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 17:09:01,072 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 17:09:01,288 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_priority_queue_top_harness.i[4496,4509] [2021-12-14 17:09:01,293 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_priority_queue_top_harness.i[4556,4569] [2021-12-14 17:09:01,722 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-14 17:09:01,772 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:09:01,782 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:09:01,782 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:09:01,782 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:09:01,783 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:09:01,790 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:09:01,791 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:09:01,792 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:09:01,792 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:09:02,001 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-14 17:09:02,002 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-14 17:09:02,003 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-14 17:09:02,007 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-14 17:09:02,008 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-14 17:09:02,009 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-14 17:09:02,010 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-14 17:09:02,011 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-14 17:09:02,011 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-14 17:09:02,012 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-14 17:09:02,086 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:09:02,087 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:09:02,130 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 17:09:02,153 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 17:09:02,170 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_priority_queue_top_harness.i[4496,4509] [2021-12-14 17:09:02,171 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_priority_queue_top_harness.i[4556,4569] [2021-12-14 17:09:02,204 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-14 17:09:02,223 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:09:02,227 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:09:02,227 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:09:02,228 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:09:02,228 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:09:02,234 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:09:02,235 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:09:02,237 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:09:02,238 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:09:02,264 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-14 17:09:02,265 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-14 17:09:02,266 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-14 17:09:02,266 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-14 17:09:02,268 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-14 17:09:02,268 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-14 17:09:02,269 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-14 17:09:02,270 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-14 17:09:02,270 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-14 17:09:02,270 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-14 17:09:02,301 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:09:02,302 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:09:02,317 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 17:09:02,455 INFO L208 MainTranslator]: Completed translation [2021-12-14 17:09:02,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:09:02 WrapperNode [2021-12-14 17:09:02,456 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 17:09:02,456 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 17:09:02,457 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 17:09:02,457 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 17:09:02,461 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:09:02" (1/1) ... [2021-12-14 17:09:02,506 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:09:02" (1/1) ... [2021-12-14 17:09:02,556 INFO L137 Inliner]: procedures = 689, calls = 1536, calls flagged for inlining = 55, calls inlined = 11, statements flattened = 719 [2021-12-14 17:09:02,557 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 17:09:02,557 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 17:09:02,557 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 17:09:02,557 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 17:09:02,563 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:09:02" (1/1) ... [2021-12-14 17:09:02,564 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:09:02" (1/1) ... [2021-12-14 17:09:02,571 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:09:02" (1/1) ... [2021-12-14 17:09:02,578 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:09:02" (1/1) ... [2021-12-14 17:09:02,612 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:09:02" (1/1) ... [2021-12-14 17:09:02,622 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:09:02" (1/1) ... [2021-12-14 17:09:02,627 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:09:02" (1/1) ... [2021-12-14 17:09:02,634 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 17:09:02,634 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 17:09:02,634 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 17:09:02,634 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 17:09:02,655 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:09:02" (1/1) ... [2021-12-14 17:09:02,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 17:09:02,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:09:02,677 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) [2021-12-14 17:09:02,698 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 [2021-12-14 17:09:02,705 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2021-12-14 17:09:02,705 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2021-12-14 17:09:02,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 17:09:02,705 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_bounded [2021-12-14 17:09:02,705 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_bounded [2021-12-14 17:09:02,705 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2021-12-14 17:09:02,706 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2021-12-14 17:09:02,706 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-14 17:09:02,706 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-14 17:09:02,706 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 17:09:02,707 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-12-14 17:09:02,707 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-12-14 17:09:02,708 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-14 17:09:02,708 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-14 17:09:02,708 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-14 17:09:02,709 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 17:09:02,709 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_array [2021-12-14 17:09:02,709 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_array [2021-12-14 17:09:02,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-14 17:09:02,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 17:09:02,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 17:09:02,709 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-14 17:09:02,710 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-14 17:09:02,710 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-12-14 17:09:02,710 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-12-14 17:09:02,710 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2021-12-14 17:09:02,710 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2021-12-14 17:09:02,710 INFO L130 BoogieDeclarations]: Found specification of procedure aws_priority_queue_is_valid [2021-12-14 17:09:02,711 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_priority_queue_is_valid [2021-12-14 17:09:02,711 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_length [2021-12-14 17:09:02,711 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_length [2021-12-14 17:09:02,711 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-14 17:09:02,711 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-14 17:09:02,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 17:09:02,712 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-14 17:09:02,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-14 17:09:02,712 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-12-14 17:09:02,712 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-12-14 17:09:02,712 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2021-12-14 17:09:02,712 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2021-12-14 17:09:02,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 17:09:02,712 INFO L130 BoogieDeclarations]: Found specification of procedure assert_array_list_equivalence [2021-12-14 17:09:02,713 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_array_list_equivalence [2021-12-14 17:09:02,713 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_array_list_has_allocated_data_member [2021-12-14 17:09:02,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_array_list_has_allocated_data_member [2021-12-14 17:09:02,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 17:09:02,982 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 17:09:02,984 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 17:09:03,533 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 17:09:03,538 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 17:09:03,538 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-14 17:09:03,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:09:03 BoogieIcfgContainer [2021-12-14 17:09:03,539 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 17:09:03,542 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 17:09:03,542 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 17:09:03,544 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 17:09:03,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 05:09:00" (1/3) ... [2021-12-14 17:09:03,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@533ecf9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:09:03, skipping insertion in model container [2021-12-14 17:09:03,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:09:02" (2/3) ... [2021-12-14 17:09:03,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@533ecf9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:09:03, skipping insertion in model container [2021-12-14 17:09:03,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:09:03" (3/3) ... [2021-12-14 17:09:03,546 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_priority_queue_top_harness.i [2021-12-14 17:09:03,553 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 17:09:03,554 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 17:09:03,606 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 17:09:03,620 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 [2021-12-14 17:09:03,622 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 17:09:03,635 INFO L276 IsEmpty]: Start isEmpty. Operand has 192 states, 124 states have (on average 1.2338709677419355) internal successors, (153), 124 states have internal predecessors, (153), 50 states have call successors, (50), 17 states have call predecessors, (50), 17 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2021-12-14 17:09:03,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-14 17:09:03,652 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:09:03,653 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:09:03,653 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:09:03,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:09:03,657 INFO L85 PathProgramCache]: Analyzing trace with hash -2080692148, now seen corresponding path program 1 times [2021-12-14 17:09:03,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:09:03,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842330934] [2021-12-14 17:09:03,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:09:03,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:09:03,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:04,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:09:04,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:04,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:09:04,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:04,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 17:09:04,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:04,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-14 17:09:04,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:04,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:09:04,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:04,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:09:04,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:04,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-14 17:09:04,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:04,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:09:04,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:04,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:09:04,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:04,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-14 17:09:04,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:04,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 17:09:04,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:04,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-14 17:09:04,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:04,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-14 17:09:04,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:04,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-14 17:09:04,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:04,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:09:04,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:04,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-14 17:09:04,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:04,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-14 17:09:04,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:04,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-14 17:09:04,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:04,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-14 17:09:04,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:04,390 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-12-14 17:09:04,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:09:04,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842330934] [2021-12-14 17:09:04,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842330934] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:09:04,391 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:09:04,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 17:09:04,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593121813] [2021-12-14 17:09:04,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:09:04,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 17:09:04,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:09:04,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 17:09:04,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-14 17:09:04,419 INFO L87 Difference]: Start difference. First operand has 192 states, 124 states have (on average 1.2338709677419355) internal successors, (153), 124 states have internal predecessors, (153), 50 states have call successors, (50), 17 states have call predecessors, (50), 17 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 2 states have internal predecessors, (44), 2 states have call successors, (19), 6 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-14 17:09:04,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:09:04,884 INFO L93 Difference]: Finished difference Result 443 states and 653 transitions. [2021-12-14 17:09:04,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 17:09:04,886 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 2 states have internal predecessors, (44), 2 states have call successors, (19), 6 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 118 [2021-12-14 17:09:04,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:09:04,894 INFO L225 Difference]: With dead ends: 443 [2021-12-14 17:09:04,894 INFO L226 Difference]: Without dead ends: 257 [2021-12-14 17:09:04,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-14 17:09:04,900 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 309 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 17:09:04,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 387 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 17:09:04,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-12-14 17:09:04,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 187. [2021-12-14 17:09:04,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 119 states have (on average 1.2100840336134453) internal successors, (144), 120 states have internal predecessors, (144), 50 states have call successors, (50), 17 states have call predecessors, (50), 17 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2021-12-14 17:09:04,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 243 transitions. [2021-12-14 17:09:04,958 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 243 transitions. Word has length 118 [2021-12-14 17:09:04,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:09:04,959 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 243 transitions. [2021-12-14 17:09:04,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 2 states have internal predecessors, (44), 2 states have call successors, (19), 6 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-14 17:09:04,959 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 243 transitions. [2021-12-14 17:09:04,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-14 17:09:04,962 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:09:04,963 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:09:04,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 17:09:04,963 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:09:04,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:09:04,964 INFO L85 PathProgramCache]: Analyzing trace with hash 440490954, now seen corresponding path program 1 times [2021-12-14 17:09:04,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:09:04,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103791414] [2021-12-14 17:09:04,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:09:04,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:09:05,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:05,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:09:05,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:05,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:09:05,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:05,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 17:09:05,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:05,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-14 17:09:05,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:05,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:09:05,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:05,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:09:05,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:05,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-14 17:09:05,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:05,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:09:05,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:05,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:09:05,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:05,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-14 17:09:05,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:05,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 17:09:05,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:05,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-14 17:09:05,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:05,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-14 17:09:05,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:05,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-14 17:09:05,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:05,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:09:05,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:05,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-14 17:09:05,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:05,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-14 17:09:05,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:05,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-14 17:09:05,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:05,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-14 17:09:05,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:05,326 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-12-14 17:09:05,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:09:05,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103791414] [2021-12-14 17:09:05,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103791414] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:09:05,330 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:09:05,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 17:09:05,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680876047] [2021-12-14 17:09:05,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:09:05,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 17:09:05,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:09:05,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 17:09:05,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-14 17:09:05,334 INFO L87 Difference]: Start difference. First operand 187 states and 243 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 5 states have internal predecessors, (44), 3 states have call successors, (19), 6 states have call predecessors, (19), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-12-14 17:09:06,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:09:06,015 INFO L93 Difference]: Finished difference Result 407 states and 561 transitions. [2021-12-14 17:09:06,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 17:09:06,016 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 5 states have internal predecessors, (44), 3 states have call successors, (19), 6 states have call predecessors, (19), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 118 [2021-12-14 17:09:06,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:09:06,019 INFO L225 Difference]: With dead ends: 407 [2021-12-14 17:09:06,020 INFO L226 Difference]: Without dead ends: 257 [2021-12-14 17:09:06,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-12-14 17:09:06,023 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 379 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 17:09:06,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 735 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 17:09:06,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-12-14 17:09:06,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 187. [2021-12-14 17:09:06,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 119 states have (on average 1.2016806722689075) internal successors, (143), 120 states have internal predecessors, (143), 50 states have call successors, (50), 17 states have call predecessors, (50), 17 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2021-12-14 17:09:06,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 242 transitions. [2021-12-14 17:09:06,049 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 242 transitions. Word has length 118 [2021-12-14 17:09:06,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:09:06,050 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 242 transitions. [2021-12-14 17:09:06,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 5 states have internal predecessors, (44), 3 states have call successors, (19), 6 states have call predecessors, (19), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-12-14 17:09:06,050 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 242 transitions. [2021-12-14 17:09:06,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-14 17:09:06,052 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:09:06,052 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:09:06,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 17:09:06,052 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:09:06,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:09:06,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1705196580, now seen corresponding path program 1 times [2021-12-14 17:09:06,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:09:06,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590954760] [2021-12-14 17:09:06,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:09:06,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:09:06,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:06,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:09:06,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:06,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:09:06,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:06,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 17:09:06,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:06,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-14 17:09:06,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:06,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:09:06,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:06,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:09:06,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:06,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-14 17:09:06,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:06,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:09:06,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:06,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:09:06,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:06,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-14 17:09:06,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:06,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:09:06,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:06,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-14 17:09:06,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:06,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-14 17:09:06,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:06,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-14 17:09:06,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:06,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 17:09:06,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:06,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:09:06,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:06,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-14 17:09:06,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:06,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-14 17:09:06,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:06,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-14 17:09:06,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:06,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-14 17:09:06,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:06,499 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-12-14 17:09:06,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:09:06,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590954760] [2021-12-14 17:09:06,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590954760] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:09:06,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516306479] [2021-12-14 17:09:06,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:09:06,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:09:06,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:09:06,503 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) [2021-12-14 17:09:06,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 17:09:06,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:06,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 2405 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 17:09:06,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:09:07,167 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-14 17:09:07,167 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:09:07,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516306479] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:09:07,167 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:09:07,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12] total 17 [2021-12-14 17:09:07,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630744098] [2021-12-14 17:09:07,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:09:07,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 17:09:07,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:09:07,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 17:09:07,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-12-14 17:09:07,170 INFO L87 Difference]: Start difference. First operand 187 states and 242 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 4 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-12-14 17:09:07,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:09:07,296 INFO L93 Difference]: Finished difference Result 356 states and 472 transitions. [2021-12-14 17:09:07,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 17:09:07,297 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 4 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 126 [2021-12-14 17:09:07,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:09:07,299 INFO L225 Difference]: With dead ends: 356 [2021-12-14 17:09:07,300 INFO L226 Difference]: Without dead ends: 189 [2021-12-14 17:09:07,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-12-14 17:09:07,303 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 78 mSDsluCounter, 1059 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:09:07,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 1296 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 17:09:07,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-12-14 17:09:07,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2021-12-14 17:09:07,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 120 states have (on average 1.2) internal successors, (144), 122 states have internal predecessors, (144), 50 states have call successors, (50), 17 states have call predecessors, (50), 18 states have return successors, (55), 49 states have call predecessors, (55), 49 states have call successors, (55) [2021-12-14 17:09:07,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 249 transitions. [2021-12-14 17:09:07,344 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 249 transitions. Word has length 126 [2021-12-14 17:09:07,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:09:07,345 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 249 transitions. [2021-12-14 17:09:07,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 4 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-12-14 17:09:07,345 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 249 transitions. [2021-12-14 17:09:07,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-14 17:09:07,346 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:09:07,346 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:09:07,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-14 17:09:07,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:09:07,563 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:09:07,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:09:07,564 INFO L85 PathProgramCache]: Analyzing trace with hash -371731420, now seen corresponding path program 1 times [2021-12-14 17:09:07,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:09:07,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318131687] [2021-12-14 17:09:07,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:09:07,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:09:07,607 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 17:09:07,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [162181048] [2021-12-14 17:09:07,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:09:07,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:09:07,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:09:07,609 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) [2021-12-14 17:09:07,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 17:09:07,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:07,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 2541 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 17:09:07,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:09:08,141 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-14 17:09:08,142 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:09:08,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:09:08,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318131687] [2021-12-14 17:09:08,142 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 17:09:08,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162181048] [2021-12-14 17:09:08,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162181048] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:09:08,143 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:09:08,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 17:09:08,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562105017] [2021-12-14 17:09:08,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:09:08,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:09:08,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:09:08,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:09:08,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 17:09:08,145 INFO L87 Difference]: Start difference. First operand 189 states and 249 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-12-14 17:09:08,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:09:08,166 INFO L93 Difference]: Finished difference Result 344 states and 467 transitions. [2021-12-14 17:09:08,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:09:08,167 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 141 [2021-12-14 17:09:08,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:09:08,168 INFO L225 Difference]: With dead ends: 344 [2021-12-14 17:09:08,168 INFO L226 Difference]: Without dead ends: 194 [2021-12-14 17:09:08,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:09:08,170 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 10 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:09:08,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 713 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:09:08,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-12-14 17:09:08,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 191. [2021-12-14 17:09:08,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 122 states have (on average 1.1967213114754098) internal successors, (146), 124 states have internal predecessors, (146), 50 states have call successors, (50), 17 states have call predecessors, (50), 18 states have return successors, (55), 49 states have call predecessors, (55), 49 states have call successors, (55) [2021-12-14 17:09:08,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 251 transitions. [2021-12-14 17:09:08,178 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 251 transitions. Word has length 141 [2021-12-14 17:09:08,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:09:08,179 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 251 transitions. [2021-12-14 17:09:08,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-12-14 17:09:08,179 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 251 transitions. [2021-12-14 17:09:08,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-14 17:09:08,181 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:09:08,181 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:09:08,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 17:09:08,395 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,SelfDestructingSolverStorable3 [2021-12-14 17:09:08,396 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:09:08,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:09:08,396 INFO L85 PathProgramCache]: Analyzing trace with hash 120894754, now seen corresponding path program 1 times [2021-12-14 17:09:08,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:09:08,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383895670] [2021-12-14 17:09:08,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:09:08,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:09:08,433 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 17:09:08,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1644090125] [2021-12-14 17:09:08,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:09:08,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:09:08,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:09:08,435 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) [2021-12-14 17:09:08,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 17:09:08,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:08,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 2546 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-14 17:09:08,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:09:09,055 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-14 17:09:09,056 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:09:09,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:09:09,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383895670] [2021-12-14 17:09:09,056 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 17:09:09,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644090125] [2021-12-14 17:09:09,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644090125] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:09:09,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:09:09,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 17:09:09,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555160018] [2021-12-14 17:09:09,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:09:09,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 17:09:09,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:09:09,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 17:09:09,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 17:09:09,058 INFO L87 Difference]: Start difference. First operand 191 states and 251 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 4 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2021-12-14 17:09:09,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:09:09,248 INFO L93 Difference]: Finished difference Result 346 states and 457 transitions. [2021-12-14 17:09:09,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 17:09:09,248 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 4 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) Word has length 141 [2021-12-14 17:09:09,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:09:09,250 INFO L225 Difference]: With dead ends: 346 [2021-12-14 17:09:09,250 INFO L226 Difference]: Without dead ends: 191 [2021-12-14 17:09:09,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-14 17:09:09,251 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 278 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 929 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:09:09,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 929 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 17:09:09,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-12-14 17:09:09,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2021-12-14 17:09:09,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 122 states have (on average 1.1885245901639345) internal successors, (145), 124 states have internal predecessors, (145), 50 states have call successors, (50), 17 states have call predecessors, (50), 18 states have return successors, (55), 49 states have call predecessors, (55), 49 states have call successors, (55) [2021-12-14 17:09:09,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 250 transitions. [2021-12-14 17:09:09,259 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 250 transitions. Word has length 141 [2021-12-14 17:09:09,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:09:09,260 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 250 transitions. [2021-12-14 17:09:09,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 4 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2021-12-14 17:09:09,260 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 250 transitions. [2021-12-14 17:09:09,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-14 17:09:09,261 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:09:09,262 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:09:09,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 17:09:09,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:09:09,477 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:09:09,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:09:09,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1915037087, now seen corresponding path program 1 times [2021-12-14 17:09:09,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:09:09,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107134166] [2021-12-14 17:09:09,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:09:09,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:09:09,517 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 17:09:09,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [746535837] [2021-12-14 17:09:09,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:09:09,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:09:09,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:09:09,519 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) [2021-12-14 17:09:09,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 17:09:09,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:09,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 2618 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 17:09:09,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:09:10,162 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-14 17:09:10,162 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:09:10,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:09:10,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107134166] [2021-12-14 17:09:10,163 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 17:09:10,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746535837] [2021-12-14 17:09:10,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746535837] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:09:10,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:09:10,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 17:09:10,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962302720] [2021-12-14 17:09:10,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:09:10,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 17:09:10,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:09:10,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 17:09:10,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 17:09:10,165 INFO L87 Difference]: Start difference. First operand 191 states and 250 transitions. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 5 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2021-12-14 17:09:10,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:09:10,303 INFO L93 Difference]: Finished difference Result 359 states and 474 transitions. [2021-12-14 17:09:10,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 17:09:10,304 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 5 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) Word has length 157 [2021-12-14 17:09:10,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:09:10,305 INFO L225 Difference]: With dead ends: 359 [2021-12-14 17:09:10,305 INFO L226 Difference]: Without dead ends: 191 [2021-12-14 17:09:10,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-14 17:09:10,306 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 116 mSDsluCounter, 1172 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 1385 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:09:10,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 1385 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 17:09:10,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-12-14 17:09:10,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2021-12-14 17:09:10,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 122 states have (on average 1.1885245901639345) internal successors, (145), 124 states have internal predecessors, (145), 50 states have call successors, (50), 17 states have call predecessors, (50), 18 states have return successors, (54), 49 states have call predecessors, (54), 49 states have call successors, (54) [2021-12-14 17:09:10,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 249 transitions. [2021-12-14 17:09:10,314 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 249 transitions. Word has length 157 [2021-12-14 17:09:10,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:09:10,315 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 249 transitions. [2021-12-14 17:09:10,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 5 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2021-12-14 17:09:10,315 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 249 transitions. [2021-12-14 17:09:10,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-12-14 17:09:10,316 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:09:10,316 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:09:10,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 17:09:10,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:09:10,531 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:09:10,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:09:10,532 INFO L85 PathProgramCache]: Analyzing trace with hash 725110269, now seen corresponding path program 2 times [2021-12-14 17:09:10,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:09:10,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019751103] [2021-12-14 17:09:10,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:09:10,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:09:10,576 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 17:09:10,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [421412124] [2021-12-14 17:09:10,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 17:09:10,577 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:09:10,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:09:10,578 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) [2021-12-14 17:09:10,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 17:09:11,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 17:09:11,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 17:09:11,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 2759 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-14 17:09:11,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:09:11,325 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-12-14 17:09:11,325 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:09:11,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:09:11,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019751103] [2021-12-14 17:09:11,325 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 17:09:11,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421412124] [2021-12-14 17:09:11,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421412124] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:09:11,326 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:09:11,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 17:09:11,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055139075] [2021-12-14 17:09:11,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:09:11,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 17:09:11,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:09:11,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 17:09:11,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-14 17:09:11,327 INFO L87 Difference]: Start difference. First operand 191 states and 249 transitions. Second operand has 9 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 5 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) [2021-12-14 17:09:11,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:09:11,583 INFO L93 Difference]: Finished difference Result 334 states and 442 transitions. [2021-12-14 17:09:11,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 17:09:11,583 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 5 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) Word has length 172 [2021-12-14 17:09:11,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:09:11,585 INFO L225 Difference]: With dead ends: 334 [2021-12-14 17:09:11,585 INFO L226 Difference]: Without dead ends: 203 [2021-12-14 17:09:11,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-12-14 17:09:11,586 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 270 mSDsluCounter, 1105 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 1298 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 17:09:11,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 1298 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 17:09:11,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-12-14 17:09:11,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2021-12-14 17:09:11,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 128 states have (on average 1.1875) internal successors, (152), 130 states have internal predecessors, (152), 55 states have call successors, (55), 18 states have call predecessors, (55), 19 states have return successors, (59), 54 states have call predecessors, (59), 54 states have call successors, (59) [2021-12-14 17:09:11,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 266 transitions. [2021-12-14 17:09:11,596 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 266 transitions. Word has length 172 [2021-12-14 17:09:11,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:09:11,596 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 266 transitions. [2021-12-14 17:09:11,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 5 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) [2021-12-14 17:09:11,597 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 266 transitions. [2021-12-14 17:09:11,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-12-14 17:09:11,599 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:09:11,599 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:09:11,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-14 17:09:11,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:09:11,804 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:09:11,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:09:11,804 INFO L85 PathProgramCache]: Analyzing trace with hash -606014439, now seen corresponding path program 1 times [2021-12-14 17:09:11,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:09:11,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843670811] [2021-12-14 17:09:11,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:09:11,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:09:11,856 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 17:09:11,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1875237003] [2021-12-14 17:09:11,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:09:11,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:09:11,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:09:11,858 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) [2021-12-14 17:09:11,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 17:09:12,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:12,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 3041 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-14 17:09:12,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:09:12,608 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-12-14 17:09:12,608 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:09:12,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:09:12,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843670811] [2021-12-14 17:09:12,608 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 17:09:12,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875237003] [2021-12-14 17:09:12,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875237003] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:09:12,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:09:12,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 17:09:12,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217783868] [2021-12-14 17:09:12,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:09:12,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 17:09:12,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:09:12,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 17:09:12,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 17:09:12,610 INFO L87 Difference]: Start difference. First operand 203 states and 266 transitions. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-12-14 17:09:12,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:09:12,876 INFO L93 Difference]: Finished difference Result 385 states and 510 transitions. [2021-12-14 17:09:12,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 17:09:12,876 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 202 [2021-12-14 17:09:12,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:09:12,877 INFO L225 Difference]: With dead ends: 385 [2021-12-14 17:09:12,877 INFO L226 Difference]: Without dead ends: 221 [2021-12-14 17:09:12,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-14 17:09:12,878 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 21 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 1072 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 17:09:12,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 1072 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 17:09:12,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-12-14 17:09:12,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 207. [2021-12-14 17:09:12,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 132 states have (on average 1.1893939393939394) internal successors, (157), 134 states have internal predecessors, (157), 55 states have call successors, (55), 18 states have call predecessors, (55), 19 states have return successors, (59), 54 states have call predecessors, (59), 54 states have call successors, (59) [2021-12-14 17:09:12,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 271 transitions. [2021-12-14 17:09:12,887 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 271 transitions. Word has length 202 [2021-12-14 17:09:12,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:09:12,887 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 271 transitions. [2021-12-14 17:09:12,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-12-14 17:09:12,888 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 271 transitions. [2021-12-14 17:09:12,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-12-14 17:09:12,889 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:09:12,889 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:09:12,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-14 17:09:13,113 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 [2021-12-14 17:09:13,113 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:09:13,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:09:13,114 INFO L85 PathProgramCache]: Analyzing trace with hash 995056667, now seen corresponding path program 1 times [2021-12-14 17:09:13,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:09:13,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31790210] [2021-12-14 17:09:13,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:09:13,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:09:13,160 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 17:09:13,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1623108611] [2021-12-14 17:09:13,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:09:13,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:09:13,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:09:13,161 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) [2021-12-14 17:09:13,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 17:09:13,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:13,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 3038 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 17:09:13,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:09:13,859 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-12-14 17:09:13,859 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:09:13,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:09:13,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31790210] [2021-12-14 17:09:13,860 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 17:09:13,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623108611] [2021-12-14 17:09:13,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623108611] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:09:13,860 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:09:13,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 17:09:13,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964524752] [2021-12-14 17:09:13,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:09:13,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:09:13,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:09:13,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:09:13,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 17:09:13,861 INFO L87 Difference]: Start difference. First operand 207 states and 271 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-12-14 17:09:13,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:09:13,885 INFO L93 Difference]: Finished difference Result 379 states and 500 transitions. [2021-12-14 17:09:13,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:09:13,886 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 202 [2021-12-14 17:09:13,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:09:13,887 INFO L225 Difference]: With dead ends: 379 [2021-12-14 17:09:13,888 INFO L226 Difference]: Without dead ends: 211 [2021-12-14 17:09:13,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:09:13,890 INFO L933 BasicCegarLoop]: 238 mSDtfsCounter, 3 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:09:13,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 709 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:09:13,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-12-14 17:09:13,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 209. [2021-12-14 17:09:13,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 134 states have (on average 1.1865671641791045) internal successors, (159), 136 states have internal predecessors, (159), 55 states have call successors, (55), 18 states have call predecessors, (55), 19 states have return successors, (59), 54 states have call predecessors, (59), 54 states have call successors, (59) [2021-12-14 17:09:13,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 273 transitions. [2021-12-14 17:09:13,902 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 273 transitions. Word has length 202 [2021-12-14 17:09:13,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:09:13,902 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 273 transitions. [2021-12-14 17:09:13,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-12-14 17:09:13,903 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 273 transitions. [2021-12-14 17:09:13,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-12-14 17:09:13,905 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:09:13,905 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:09:13,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-14 17:09:14,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:09:14,119 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:09:14,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:09:14,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1948525411, now seen corresponding path program 1 times [2021-12-14 17:09:14,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:09:14,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007641608] [2021-12-14 17:09:14,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:09:14,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:09:14,164 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 17:09:14,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [786222541] [2021-12-14 17:09:14,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:09:14,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:09:14,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:09:14,165 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:09:14,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-14 17:09:14,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:14,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 3033 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-14 17:09:14,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:09:14,934 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 11 treesize of output 5 [2021-12-14 17:09:15,070 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 133 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-14 17:09:15,070 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:09:15,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:09:15,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007641608] [2021-12-14 17:09:15,071 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 17:09:15,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786222541] [2021-12-14 17:09:15,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786222541] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:09:15,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:09:15,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 17:09:15,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838417459] [2021-12-14 17:09:15,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:09:15,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 17:09:15,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:09:15,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 17:09:15,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-14 17:09:15,075 INFO L87 Difference]: Start difference. First operand 209 states and 273 transitions. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 6 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2021-12-14 17:09:15,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:09:15,453 INFO L93 Difference]: Finished difference Result 404 states and 541 transitions. [2021-12-14 17:09:15,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 17:09:15,454 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 6 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) Word has length 202 [2021-12-14 17:09:15,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:09:15,455 INFO L225 Difference]: With dead ends: 404 [2021-12-14 17:09:15,455 INFO L226 Difference]: Without dead ends: 232 [2021-12-14 17:09:15,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-12-14 17:09:15,456 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 118 mSDsluCounter, 1524 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 1739 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 17:09:15,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 1739 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 17:09:15,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-12-14 17:09:15,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 222. [2021-12-14 17:09:15,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 146 states have (on average 1.1917808219178083) internal successors, (174), 148 states have internal predecessors, (174), 55 states have call successors, (55), 18 states have call predecessors, (55), 20 states have return successors, (68), 55 states have call predecessors, (68), 54 states have call successors, (68) [2021-12-14 17:09:15,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 297 transitions. [2021-12-14 17:09:15,465 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 297 transitions. Word has length 202 [2021-12-14 17:09:15,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:09:15,465 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 297 transitions. [2021-12-14 17:09:15,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 6 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2021-12-14 17:09:15,465 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 297 transitions. [2021-12-14 17:09:15,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-12-14 17:09:15,467 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:09:15,467 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:09:15,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-14 17:09:15,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-14 17:09:15,673 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:09:15,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:09:15,674 INFO L85 PathProgramCache]: Analyzing trace with hash 425026459, now seen corresponding path program 1 times [2021-12-14 17:09:15,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:09:15,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440539271] [2021-12-14 17:09:15,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:09:15,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:09:15,720 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 17:09:15,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1425986119] [2021-12-14 17:09:15,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:09:15,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:09:15,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:09:15,722 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:09:15,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-14 17:09:16,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:16,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 3036 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-14 17:09:16,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:09:16,448 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-12-14 17:09:16,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:09:16,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:09:16,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440539271] [2021-12-14 17:09:16,449 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 17:09:16,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425986119] [2021-12-14 17:09:16,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425986119] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:09:16,450 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:09:16,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 17:09:16,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22424302] [2021-12-14 17:09:16,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:09:16,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 17:09:16,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:09:16,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 17:09:16,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:09:16,452 INFO L87 Difference]: Start difference. First operand 222 states and 297 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-12-14 17:09:16,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:09:16,481 INFO L93 Difference]: Finished difference Result 421 states and 568 transitions. [2021-12-14 17:09:16,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 17:09:16,483 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 202 [2021-12-14 17:09:16,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:09:16,486 INFO L225 Difference]: With dead ends: 421 [2021-12-14 17:09:16,486 INFO L226 Difference]: Without dead ends: 238 [2021-12-14 17:09:16,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-14 17:09:16,487 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 9 mSDsluCounter, 719 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 964 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:09:16,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 964 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:09:16,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-12-14 17:09:16,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 232. [2021-12-14 17:09:16,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 156 states have (on average 1.1923076923076923) internal successors, (186), 158 states have internal predecessors, (186), 55 states have call successors, (55), 18 states have call predecessors, (55), 20 states have return successors, (68), 55 states have call predecessors, (68), 54 states have call successors, (68) [2021-12-14 17:09:16,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 309 transitions. [2021-12-14 17:09:16,499 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 309 transitions. Word has length 202 [2021-12-14 17:09:16,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:09:16,501 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 309 transitions. [2021-12-14 17:09:16,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-12-14 17:09:16,501 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 309 transitions. [2021-12-14 17:09:16,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-12-14 17:09:16,503 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:09:16,503 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:09:16,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-14 17:09:16,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:09:16,719 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:09:16,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:09:16,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1913156837, now seen corresponding path program 1 times [2021-12-14 17:09:16,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:09:16,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201849478] [2021-12-14 17:09:16,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:09:16,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:09:16,771 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 17:09:16,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [847359137] [2021-12-14 17:09:16,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:09:16,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:09:16,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:09:16,773 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:09:16,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-14 17:09:17,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:17,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 3038 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 17:09:17,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:09:17,445 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-12-14 17:09:17,445 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:09:17,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:09:17,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201849478] [2021-12-14 17:09:17,446 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 17:09:17,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847359137] [2021-12-14 17:09:17,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847359137] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:09:17,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:09:17,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 17:09:17,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891707645] [2021-12-14 17:09:17,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:09:17,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:09:17,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:09:17,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:09:17,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 17:09:17,448 INFO L87 Difference]: Start difference. First operand 232 states and 309 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-12-14 17:09:17,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:09:17,471 INFO L93 Difference]: Finished difference Result 421 states and 565 transitions. [2021-12-14 17:09:17,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:09:17,471 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 202 [2021-12-14 17:09:17,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:09:17,473 INFO L225 Difference]: With dead ends: 421 [2021-12-14 17:09:17,473 INFO L226 Difference]: Without dead ends: 228 [2021-12-14 17:09:17,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:09:17,474 INFO L933 BasicCegarLoop]: 240 mSDtfsCounter, 2 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:09:17,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 711 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:09:17,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-12-14 17:09:17,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 224. [2021-12-14 17:09:17,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 148 states have (on average 1.1756756756756757) internal successors, (174), 150 states have internal predecessors, (174), 55 states have call successors, (55), 18 states have call predecessors, (55), 20 states have return successors, (68), 55 states have call predecessors, (68), 54 states have call successors, (68) [2021-12-14 17:09:17,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 297 transitions. [2021-12-14 17:09:17,482 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 297 transitions. Word has length 202 [2021-12-14 17:09:17,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:09:17,483 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 297 transitions. [2021-12-14 17:09:17,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-12-14 17:09:17,483 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 297 transitions. [2021-12-14 17:09:17,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-12-14 17:09:17,484 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:09:17,485 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:09:17,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-14 17:09:17,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-14 17:09:17,691 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:09:17,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:09:17,692 INFO L85 PathProgramCache]: Analyzing trace with hash -2039492555, now seen corresponding path program 1 times [2021-12-14 17:09:17,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:09:17,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845206134] [2021-12-14 17:09:17,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:09:17,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:09:17,733 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 17:09:17,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1151832395] [2021-12-14 17:09:17,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:09:17,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:09:17,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:09:17,734 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:09:17,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-14 17:09:18,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:18,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 3033 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 17:09:18,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:09:18,498 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-12-14 17:09:18,499 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:09:18,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:09:18,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845206134] [2021-12-14 17:09:18,499 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 17:09:18,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151832395] [2021-12-14 17:09:18,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151832395] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:09:18,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:09:18,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 17:09:18,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272808828] [2021-12-14 17:09:18,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:09:18,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 17:09:18,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:09:18,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 17:09:18,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:09:18,500 INFO L87 Difference]: Start difference. First operand 224 states and 297 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-12-14 17:09:18,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:09:18,650 INFO L93 Difference]: Finished difference Result 409 states and 558 transitions. [2021-12-14 17:09:18,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 17:09:18,651 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 204 [2021-12-14 17:09:18,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:09:18,652 INFO L225 Difference]: With dead ends: 409 [2021-12-14 17:09:18,652 INFO L226 Difference]: Without dead ends: 224 [2021-12-14 17:09:18,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 17:09:18,653 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 7 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 895 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:09:18,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 895 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 17:09:18,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-12-14 17:09:18,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2021-12-14 17:09:18,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 148 states have (on average 1.1689189189189189) internal successors, (173), 150 states have internal predecessors, (173), 55 states have call successors, (55), 18 states have call predecessors, (55), 20 states have return successors, (68), 55 states have call predecessors, (68), 54 states have call successors, (68) [2021-12-14 17:09:18,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 296 transitions. [2021-12-14 17:09:18,662 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 296 transitions. Word has length 204 [2021-12-14 17:09:18,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:09:18,662 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 296 transitions. [2021-12-14 17:09:18,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-12-14 17:09:18,662 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 296 transitions. [2021-12-14 17:09:18,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-12-14 17:09:18,663 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:09:18,663 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:09:18,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-14 17:09:18,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-14 17:09:18,867 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:09:18,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:09:18,868 INFO L85 PathProgramCache]: Analyzing trace with hash 113614263, now seen corresponding path program 1 times [2021-12-14 17:09:18,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:09:18,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212443298] [2021-12-14 17:09:18,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:09:18,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:09:18,908 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 17:09:18,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1525697499] [2021-12-14 17:09:18,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:09:18,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:09:18,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:09:18,909 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:09:18,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-14 17:09:19,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:19,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 3038 conjuncts, 103 conjunts are in the unsatisfiable core [2021-12-14 17:09:19,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:09:20,643 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-12-14 17:09:20,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2021-12-14 17:09:20,651 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-12-14 17:09:20,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 20 [2021-12-14 17:09:20,655 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-12-14 17:09:20,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-12-14 17:09:20,888 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 145 proven. 4 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-14 17:09:20,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:09:21,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:09:21,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212443298] [2021-12-14 17:09:21,621 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 17:09:21,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525697499] [2021-12-14 17:09:21,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525697499] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:09:21,622 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:09:21,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-12-14 17:09:21,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493025057] [2021-12-14 17:09:21,622 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-14 17:09:21,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-14 17:09:21,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:09:21,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-14 17:09:21,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-12-14 17:09:21,623 INFO L87 Difference]: Start difference. First operand 224 states and 296 transitions. Second operand has 22 states, 21 states have (on average 4.857142857142857) internal successors, (102), 20 states have internal predecessors, (102), 8 states have call successors, (26), 5 states have call predecessors, (26), 7 states have return successors, (24), 7 states have call predecessors, (24), 8 states have call successors, (24) [2021-12-14 17:09:29,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:09:29,582 INFO L93 Difference]: Finished difference Result 506 states and 693 transitions. [2021-12-14 17:09:29,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-14 17:09:29,583 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 4.857142857142857) internal successors, (102), 20 states have internal predecessors, (102), 8 states have call successors, (26), 5 states have call predecessors, (26), 7 states have return successors, (24), 7 states have call predecessors, (24), 8 states have call successors, (24) Word has length 204 [2021-12-14 17:09:29,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:09:29,586 INFO L225 Difference]: With dead ends: 506 [2021-12-14 17:09:29,586 INFO L226 Difference]: Without dead ends: 333 [2021-12-14 17:09:29,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 251 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=353, Invalid=3185, Unknown=2, NotChecked=0, Total=3540 [2021-12-14 17:09:29,588 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 325 mSDsluCounter, 1612 mSDsCounter, 0 mSdLazyCounter, 3455 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 1821 SdHoareTripleChecker+Invalid, 3873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 3455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 286 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-14 17:09:29,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 1821 Invalid, 3873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 3455 Invalid, 0 Unknown, 286 Unchecked, 2.4s Time] [2021-12-14 17:09:29,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-12-14 17:09:29,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 249. [2021-12-14 17:09:29,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 166 states have (on average 1.1626506024096386) internal successors, (193), 170 states have internal predecessors, (193), 59 states have call successors, (59), 19 states have call predecessors, (59), 23 states have return successors, (77), 59 states have call predecessors, (77), 58 states have call successors, (77) [2021-12-14 17:09:29,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 329 transitions. [2021-12-14 17:09:29,600 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 329 transitions. Word has length 204 [2021-12-14 17:09:29,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:09:29,601 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 329 transitions. [2021-12-14 17:09:29,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 4.857142857142857) internal successors, (102), 20 states have internal predecessors, (102), 8 states have call successors, (26), 5 states have call predecessors, (26), 7 states have return successors, (24), 7 states have call predecessors, (24), 8 states have call successors, (24) [2021-12-14 17:09:29,601 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 329 transitions. [2021-12-14 17:09:29,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-12-14 17:09:29,602 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:09:29,602 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:09:29,624 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-14 17:09:29,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-14 17:09:29,824 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:09:29,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:09:29,824 INFO L85 PathProgramCache]: Analyzing trace with hash -249329005, now seen corresponding path program 1 times [2021-12-14 17:09:29,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:09:29,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119860248] [2021-12-14 17:09:29,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:09:29,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:09:29,888 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 17:09:29,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1983642379] [2021-12-14 17:09:29,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:09:29,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:09:29,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:09:29,890 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:09:29,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-14 17:09:30,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:30,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 3083 conjuncts, 112 conjunts are in the unsatisfiable core [2021-12-14 17:09:30,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:09:30,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 17:09:30,837 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-12-14 17:09:30,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-14 17:09:32,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:09:32,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-14 17:09:35,561 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2178 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_2178))) is different from true [2021-12-14 17:09:36,791 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 152 proven. 20 refuted. 2 times theorem prover too weak. 68 trivial. 3 not checked. [2021-12-14 17:09:36,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:09:37,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:09:37,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119860248] [2021-12-14 17:09:37,455 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 17:09:37,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983642379] [2021-12-14 17:09:37,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983642379] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:09:37,455 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:09:37,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2021-12-14 17:09:37,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609175929] [2021-12-14 17:09:37,456 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-14 17:09:37,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-14 17:09:37,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:09:37,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-14 17:09:37,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=857, Unknown=37, NotChecked=60, Total=1056 [2021-12-14 17:09:37,457 INFO L87 Difference]: Start difference. First operand 249 states and 329 transitions. Second operand has 32 states, 28 states have (on average 4.25) internal successors, (119), 27 states have internal predecessors, (119), 12 states have call successors, (30), 7 states have call predecessors, (30), 12 states have return successors, (28), 12 states have call predecessors, (28), 12 states have call successors, (28) [2021-12-14 17:09:38,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:09:38,844 INFO L93 Difference]: Finished difference Result 546 states and 730 transitions. [2021-12-14 17:09:38,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-14 17:09:38,845 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 28 states have (on average 4.25) internal successors, (119), 27 states have internal predecessors, (119), 12 states have call successors, (30), 7 states have call predecessors, (30), 12 states have return successors, (28), 12 states have call predecessors, (28), 12 states have call successors, (28) Word has length 211 [2021-12-14 17:09:38,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:09:38,846 INFO L225 Difference]: With dead ends: 546 [2021-12-14 17:09:38,846 INFO L226 Difference]: Without dead ends: 337 [2021-12-14 17:09:38,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 267 SyntacticMatches, 10 SemanticMatches, 42 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=168, Invalid=1589, Unknown=53, NotChecked=82, Total=1892 [2021-12-14 17:09:38,848 INFO L933 BasicCegarLoop]: 220 mSDtfsCounter, 155 mSDsluCounter, 1598 mSDsCounter, 0 mSdLazyCounter, 1269 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 1818 SdHoareTripleChecker+Invalid, 3815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2409 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 17:09:38,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 1818 Invalid, 3815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1269 Invalid, 0 Unknown, 2409 Unchecked, 0.9s Time] [2021-12-14 17:09:38,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-12-14 17:09:38,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 311. [2021-12-14 17:09:38,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 213 states have (on average 1.1549295774647887) internal successors, (246), 220 states have internal predecessors, (246), 65 states have call successors, (65), 24 states have call predecessors, (65), 32 states have return successors, (109), 66 states have call predecessors, (109), 64 states have call successors, (109) [2021-12-14 17:09:38,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 420 transitions. [2021-12-14 17:09:38,864 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 420 transitions. Word has length 211 [2021-12-14 17:09:38,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:09:38,865 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 420 transitions. [2021-12-14 17:09:38,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 28 states have (on average 4.25) internal successors, (119), 27 states have internal predecessors, (119), 12 states have call successors, (30), 7 states have call predecessors, (30), 12 states have return successors, (28), 12 states have call predecessors, (28), 12 states have call successors, (28) [2021-12-14 17:09:38,865 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 420 transitions. [2021-12-14 17:09:38,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-12-14 17:09:38,867 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:09:38,867 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:09:38,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-14 17:09:39,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-14 17:09:39,093 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:09:39,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:09:39,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1936432884, now seen corresponding path program 1 times [2021-12-14 17:09:39,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:09:39,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576063050] [2021-12-14 17:09:39,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:09:39,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:09:39,144 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 17:09:39,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [456788787] [2021-12-14 17:09:39,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:09:39,145 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:09:39,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:09:39,146 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:09:39,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-14 17:09:39,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:09:39,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 3122 conjuncts, 158 conjunts are in the unsatisfiable core [2021-12-14 17:09:39,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:09:39,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 17:09:40,090 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-12-14 17:09:40,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-14 17:09:56,811 INFO L354 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2021-12-14 17:09:56,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2021-12-14 17:09:56,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 17:10:07,286 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-14 17:10:07,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-14 17:10:07,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:10:07,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:10:07,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:10:07,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:10:07,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:10:07,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:10:07,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:10:07,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:10:07,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:10:07,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:10:07,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 62