./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be16_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be16_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 e59944759baac4a78b3b5460ff6f3a8abaec03123fb9537d86aeca785269fb41 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 03:15:21,485 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 03:15:21,486 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 03:15:21,525 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 03:15:21,525 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 03:15:21,528 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 03:15:21,529 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 03:15:21,533 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 03:15:21,534 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 03:15:21,538 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 03:15:21,539 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 03:15:21,541 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 03:15:21,542 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 03:15:21,543 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 03:15:21,544 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 03:15:21,546 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 03:15:21,547 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 03:15:21,548 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 03:15:21,549 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 03:15:21,553 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 03:15:21,554 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 03:15:21,555 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 03:15:21,556 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 03:15:21,557 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 03:15:21,562 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 03:15:21,562 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 03:15:21,562 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 03:15:21,563 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 03:15:21,563 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 03:15:21,564 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 03:15:21,564 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 03:15:21,565 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 03:15:21,566 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 03:15:21,566 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 03:15:21,567 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 03:15:21,567 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 03:15:21,568 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 03:15:21,568 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 03:15:21,568 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 03:15:21,569 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 03:15:21,570 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 03:15:21,573 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-28 03:15:21,601 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 03:15:21,601 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 03:15:21,602 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 03:15:21,602 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 03:15:21,603 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 03:15:21,603 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 03:15:21,604 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 03:15:21,604 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 03:15:21,604 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 03:15:21,604 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 03:15:21,605 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 03:15:21,605 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 03:15:21,605 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 03:15:21,606 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 03:15:21,606 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 03:15:21,606 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 03:15:21,606 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 03:15:21,606 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 03:15:21,606 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 03:15:21,607 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 03:15:21,607 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 03:15:21,607 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 03:15:21,607 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 03:15:21,607 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 03:15:21,608 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 03:15:21,608 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 03:15:21,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 03:15:21,608 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 03:15:21,608 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 03:15:21,608 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 03:15:21,609 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e59944759baac4a78b3b5460ff6f3a8abaec03123fb9537d86aeca785269fb41 [2021-12-28 03:15:21,884 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 03:15:21,899 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 03:15:21,901 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 03:15:21,902 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 03:15:21,902 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 03:15:21,903 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be16_harness.i [2021-12-28 03:15:21,955 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7530485d2/75f2c468a636445993dcd05fccf52903/FLAG200c73e4c [2021-12-28 03:15:22,503 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 03:15:22,504 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be16_harness.i [2021-12-28 03:15:22,534 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7530485d2/75f2c468a636445993dcd05fccf52903/FLAG200c73e4c [2021-12-28 03:15:22,682 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7530485d2/75f2c468a636445993dcd05fccf52903 [2021-12-28 03:15:22,684 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 03:15:22,686 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 03:15:22,688 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 03:15:22,688 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 03:15:22,691 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 03:15:22,691 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 03:15:22" (1/1) ... [2021-12-28 03:15:22,692 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@148f43d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:15:22, skipping insertion in model container [2021-12-28 03:15:22,692 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 03:15:22" (1/1) ... [2021-12-28 03:15:22,697 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 03:15:22,785 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 03:15:23,011 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be16_harness.i[4497,4510] [2021-12-28 03:15:23,017 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be16_harness.i[4557,4570] [2021-12-28 03:15:23,513 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:23,516 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:23,518 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:23,519 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:23,522 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:23,537 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:23,540 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:23,544 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:23,544 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:23,807 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-28 03:15:23,809 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-28 03:15:23,810 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-28 03:15:23,811 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-28 03:15:23,815 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-28 03:15:23,816 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-28 03:15:23,817 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-28 03:15:23,817 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-28 03:15:23,819 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-28 03:15:23,820 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-28 03:15:23,945 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-28 03:15:24,023 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:24,023 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:24,080 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 03:15:24,148 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 03:15:24,157 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be16_harness.i[4497,4510] [2021-12-28 03:15:24,157 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be16_harness.i[4557,4570] [2021-12-28 03:15:24,199 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:24,199 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:24,200 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:24,200 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:24,200 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:24,214 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:24,214 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:24,215 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:24,215 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:24,279 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-28 03:15:24,280 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-28 03:15:24,280 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-28 03:15:24,281 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-28 03:15:24,281 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-28 03:15:24,281 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-28 03:15:24,281 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-28 03:15:24,282 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-28 03:15:24,282 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-28 03:15:24,282 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-28 03:15:24,292 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-28 03:15:24,339 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:24,355 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:24,369 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 03:15:24,570 INFO L208 MainTranslator]: Completed translation [2021-12-28 03:15:24,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:15:24 WrapperNode [2021-12-28 03:15:24,571 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 03:15:24,572 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 03:15:24,572 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 03:15:24,572 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 03:15:24,577 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:15:24" (1/1) ... [2021-12-28 03:15:24,682 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:15:24" (1/1) ... [2021-12-28 03:15:24,754 INFO L137 Inliner]: procedures = 691, calls = 2619, calls flagged for inlining = 62, calls inlined = 10, statements flattened = 866 [2021-12-28 03:15:24,754 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 03:15:24,755 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 03:15:24,755 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 03:15:24,755 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 03:15:24,761 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:15:24" (1/1) ... [2021-12-28 03:15:24,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:15:24" (1/1) ... [2021-12-28 03:15:24,771 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:15:24" (1/1) ... [2021-12-28 03:15:24,772 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:15:24" (1/1) ... [2021-12-28 03:15:24,809 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:15:24" (1/1) ... [2021-12-28 03:15:24,822 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:15:24" (1/1) ... [2021-12-28 03:15:24,833 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:15:24" (1/1) ... [2021-12-28 03:15:24,843 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 03:15:24,846 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 03:15:24,846 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 03:15:24,846 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 03:15:24,847 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:15:24" (1/1) ... [2021-12-28 03:15:24,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 03:15:24,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:15:24,870 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) [2021-12-28 03:15:24,876 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 [2021-12-28 03:15:24,898 INFO L130 BoogieDeclarations]: Found specification of procedure htons [2021-12-28 03:15:24,898 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-12-28 03:15:24,898 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-12-28 03:15:24,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-28 03:15:24,898 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-28 03:15:24,899 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-28 03:15:24,899 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-28 03:15:24,899 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-28 03:15:24,899 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-28 03:15:24,900 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-28 03:15:24,900 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 03:15:24,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-28 03:15:24,901 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_impl [2021-12-28 03:15:24,901 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_impl [2021-12-28 03:15:24,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 03:15:24,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 03:15:24,902 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-28 03:15:24,902 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-28 03:15:24,902 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-12-28 03:15:24,903 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-12-28 03:15:24,903 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-28 03:15:24,903 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-28 03:15:24,903 INFO L130 BoogieDeclarations]: Found specification of procedure my_memcpy [2021-12-28 03:15:24,903 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memcpy [2021-12-28 03:15:24,903 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-28 03:15:24,903 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-28 03:15:24,904 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_write [2021-12-28 03:15:24,904 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_write [2021-12-28 03:15:24,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-28 03:15:24,904 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-12-28 03:15:24,904 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-12-28 03:15:24,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-28 03:15:24,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 03:15:25,151 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 03:15:25,168 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 03:15:25,918 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 03:15:25,928 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 03:15:25,928 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-28 03:15:25,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 03:15:25 BoogieIcfgContainer [2021-12-28 03:15:25,931 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 03:15:25,932 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 03:15:25,932 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 03:15:25,934 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 03:15:25,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 03:15:22" (1/3) ... [2021-12-28 03:15:25,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79d9d454 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 03:15:25, skipping insertion in model container [2021-12-28 03:15:25,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:15:24" (2/3) ... [2021-12-28 03:15:25,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79d9d454 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 03:15:25, skipping insertion in model container [2021-12-28 03:15:25,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 03:15:25" (3/3) ... [2021-12-28 03:15:25,937 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_write_be16_harness.i [2021-12-28 03:15:25,942 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 03:15:25,942 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 03:15:25,989 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 03:15:25,999 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 [2021-12-28 03:15:26,000 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 03:15:26,015 INFO L276 IsEmpty]: Start isEmpty. Operand has 132 states, 86 states have (on average 1.2325581395348837) internal successors, (106), 87 states have internal predecessors, (106), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-12-28 03:15:26,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-28 03:15:26,024 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:26,025 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:15:26,025 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:26,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:26,031 INFO L85 PathProgramCache]: Analyzing trace with hash 239952465, now seen corresponding path program 1 times [2021-12-28 03:15:26,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:26,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351461344] [2021-12-28 03:15:26,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:26,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:26,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:26,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:15:26,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:26,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:15:26,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:26,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:15:26,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:26,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:26,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:26,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 03:15:26,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:26,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 03:15:26,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:26,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 03:15:26,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:26,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 03:15:26,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:26,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-28 03:15:26,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:26,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-28 03:15:26,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:26,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-28 03:15:26,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:26,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-28 03:15:26,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:26,637 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-28 03:15:26,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:26,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351461344] [2021-12-28 03:15:26,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351461344] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:15:26,639 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:15:26,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 03:15:26,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169572174] [2021-12-28 03:15:26,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:15:26,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 03:15:26,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:26,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 03:15:26,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 03:15:26,674 INFO L87 Difference]: Start difference. First operand has 132 states, 86 states have (on average 1.2325581395348837) internal successors, (106), 87 states have internal predecessors, (106), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-28 03:15:26,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:26,859 INFO L93 Difference]: Finished difference Result 260 states and 369 transitions. [2021-12-28 03:15:26,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 03:15:26,861 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) Word has length 86 [2021-12-28 03:15:26,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:26,867 INFO L225 Difference]: With dead ends: 260 [2021-12-28 03:15:26,867 INFO L226 Difference]: Without dead ends: 127 [2021-12-28 03:15:26,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 03:15:26,872 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 62 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:26,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 191 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 03:15:26,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-12-28 03:15:26,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-12-28 03:15:26,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 82 states have (on average 1.2073170731707317) internal successors, (99), 83 states have internal predecessors, (99), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-28 03:15:26,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 166 transitions. [2021-12-28 03:15:26,904 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 166 transitions. Word has length 86 [2021-12-28 03:15:26,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:26,904 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 166 transitions. [2021-12-28 03:15:26,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-28 03:15:26,905 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 166 transitions. [2021-12-28 03:15:26,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-28 03:15:26,907 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:26,908 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:15:26,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 03:15:26,908 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:26,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:26,909 INFO L85 PathProgramCache]: Analyzing trace with hash 89659733, now seen corresponding path program 1 times [2021-12-28 03:15:26,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:26,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020355358] [2021-12-28 03:15:26,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:26,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:26,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:27,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:15:27,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:27,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:15:27,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:27,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:15:27,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:27,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:27,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:27,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 03:15:27,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:27,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 03:15:27,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:27,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 03:15:27,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:27,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 03:15:27,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:27,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-28 03:15:27,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:27,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-28 03:15:27,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:27,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-28 03:15:27,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:27,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-28 03:15:27,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:27,187 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-28 03:15:27,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:27,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020355358] [2021-12-28 03:15:27,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020355358] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:15:27,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751851131] [2021-12-28 03:15:27,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:27,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:27,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:15:27,204 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) [2021-12-28 03:15:27,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 03:15:27,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:27,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 2620 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-28 03:15:27,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:15:27,883 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-28 03:15:27,883 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:15:27,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751851131] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:15:27,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:15:27,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-12-28 03:15:27,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432898555] [2021-12-28 03:15:27,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:15:27,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 03:15:27,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:27,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 03:15:27,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:15:27,885 INFO L87 Difference]: Start difference. First operand 127 states and 166 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-28 03:15:28,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:28,026 INFO L93 Difference]: Finished difference Result 232 states and 311 transitions. [2021-12-28 03:15:28,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 03:15:28,026 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 86 [2021-12-28 03:15:28,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:28,028 INFO L225 Difference]: With dead ends: 232 [2021-12-28 03:15:28,028 INFO L226 Difference]: Without dead ends: 130 [2021-12-28 03:15:28,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-12-28 03:15:28,030 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 195 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:28,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 473 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 03:15:28,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-12-28 03:15:28,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2021-12-28 03:15:28,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 84 states have (on average 1.2023809523809523) internal successors, (101), 86 states have internal predecessors, (101), 34 states have call successors, (34), 10 states have call predecessors, (34), 11 states have return successors, (37), 33 states have call predecessors, (37), 33 states have call successors, (37) [2021-12-28 03:15:28,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 172 transitions. [2021-12-28 03:15:28,041 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 172 transitions. Word has length 86 [2021-12-28 03:15:28,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:28,042 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 172 transitions. [2021-12-28 03:15:28,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-28 03:15:28,042 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 172 transitions. [2021-12-28 03:15:28,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-28 03:15:28,044 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:28,044 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:15:28,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-28 03:15:28,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:28,266 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:28,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:28,266 INFO L85 PathProgramCache]: Analyzing trace with hash -171255798, now seen corresponding path program 1 times [2021-12-28 03:15:28,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:28,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706319307] [2021-12-28 03:15:28,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:28,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:28,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:28,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:15:28,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:28,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:15:28,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:28,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:15:28,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:28,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:28,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:28,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 03:15:28,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:28,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 03:15:28,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:28,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 03:15:28,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:28,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-28 03:15:28,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:28,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-28 03:15:28,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:28,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-28 03:15:28,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:28,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-28 03:15:28,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:28,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-28 03:15:28,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:28,603 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-28 03:15:28,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:28,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706319307] [2021-12-28 03:15:28,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706319307] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:15:28,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462875688] [2021-12-28 03:15:28,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:28,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:28,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:15:28,605 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) [2021-12-28 03:15:28,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-28 03:15:28,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:28,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 2637 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-28 03:15:28,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:15:29,172 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-28 03:15:29,172 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:15:29,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462875688] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:15:29,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:15:29,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-12-28 03:15:29,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806411713] [2021-12-28 03:15:29,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:15:29,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 03:15:29,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:29,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 03:15:29,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-12-28 03:15:29,174 INFO L87 Difference]: Start difference. First operand 130 states and 172 transitions. Second operand has 7 states, 6 states have (on average 8.333333333333334) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-28 03:15:29,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:29,312 INFO L93 Difference]: Finished difference Result 227 states and 302 transitions. [2021-12-28 03:15:29,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 03:15:29,312 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.333333333333334) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) Word has length 92 [2021-12-28 03:15:29,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:29,314 INFO L225 Difference]: With dead ends: 227 [2021-12-28 03:15:29,314 INFO L226 Difference]: Without dead ends: 130 [2021-12-28 03:15:29,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-12-28 03:15:29,315 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 212 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:29,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 591 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 03:15:29,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-12-28 03:15:29,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2021-12-28 03:15:29,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 84 states have (on average 1.2023809523809523) internal successors, (101), 86 states have internal predecessors, (101), 34 states have call successors, (34), 10 states have call predecessors, (34), 11 states have return successors, (36), 33 states have call predecessors, (36), 33 states have call successors, (36) [2021-12-28 03:15:29,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 171 transitions. [2021-12-28 03:15:29,324 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 171 transitions. Word has length 92 [2021-12-28 03:15:29,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:29,324 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 171 transitions. [2021-12-28 03:15:29,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.333333333333334) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-28 03:15:29,325 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 171 transitions. [2021-12-28 03:15:29,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-28 03:15:29,326 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:29,326 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:15:29,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-28 03:15:29,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-28 03:15:29,549 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:29,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:29,549 INFO L85 PathProgramCache]: Analyzing trace with hash -358018689, now seen corresponding path program 2 times [2021-12-28 03:15:29,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:29,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961361436] [2021-12-28 03:15:29,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:29,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:29,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:29,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:15:29,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:29,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:15:29,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:29,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:15:29,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:29,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:29,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:29,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 03:15:29,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:29,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 03:15:29,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:29,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 03:15:29,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:29,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-28 03:15:29,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:29,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-28 03:15:29,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:29,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-28 03:15:29,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:29,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-28 03:15:29,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:29,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-28 03:15:29,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:29,887 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-28 03:15:29,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:29,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961361436] [2021-12-28 03:15:29,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961361436] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:15:29,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117274056] [2021-12-28 03:15:29,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 03:15:29,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:29,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:15:29,907 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) [2021-12-28 03:15:29,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-28 03:15:30,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 03:15:30,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:15:30,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 2654 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-28 03:15:30,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:15:30,476 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-28 03:15:30,476 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:15:30,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117274056] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:15:30,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:15:30,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 9 [2021-12-28 03:15:30,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601497081] [2021-12-28 03:15:30,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:15:30,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 03:15:30,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:30,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 03:15:30,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-28 03:15:30,477 INFO L87 Difference]: Start difference. First operand 130 states and 171 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-28 03:15:30,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:30,564 INFO L93 Difference]: Finished difference Result 221 states and 292 transitions. [2021-12-28 03:15:30,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 03:15:30,565 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 98 [2021-12-28 03:15:30,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:30,566 INFO L225 Difference]: With dead ends: 221 [2021-12-28 03:15:30,566 INFO L226 Difference]: Without dead ends: 127 [2021-12-28 03:15:30,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-12-28 03:15:30,567 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 80 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 924 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:30,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 924 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 03:15:30,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-12-28 03:15:30,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-12-28 03:15:30,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 82 states have (on average 1.1951219512195121) internal successors, (98), 83 states have internal predecessors, (98), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-28 03:15:30,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 165 transitions. [2021-12-28 03:15:30,574 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 165 transitions. Word has length 98 [2021-12-28 03:15:30,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:30,574 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 165 transitions. [2021-12-28 03:15:30,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-28 03:15:30,575 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 165 transitions. [2021-12-28 03:15:30,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-28 03:15:30,587 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:30,588 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:15:30,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-28 03:15:30,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:30,788 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:30,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:30,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1323939499, now seen corresponding path program 1 times [2021-12-28 03:15:30,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:30,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737506959] [2021-12-28 03:15:30,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:30,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:30,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:31,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:15:31,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:31,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:15:31,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:31,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:15:31,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:31,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:31,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:31,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 03:15:31,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:31,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 03:15:31,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:31,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 03:15:31,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:31,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-28 03:15:31,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:31,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-28 03:15:31,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:31,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-28 03:15:31,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:31,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-28 03:15:31,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:31,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-28 03:15:31,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:31,222 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-12-28 03:15:31,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:31,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737506959] [2021-12-28 03:15:31,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737506959] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:15:31,222 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:15:31,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 03:15:31,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543033463] [2021-12-28 03:15:31,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:15:31,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 03:15:31,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:31,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 03:15:31,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-28 03:15:31,224 INFO L87 Difference]: Start difference. First operand 127 states and 165 transitions. Second operand has 9 states, 8 states have (on average 5.375) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2021-12-28 03:15:31,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:31,706 INFO L93 Difference]: Finished difference Result 139 states and 182 transitions. [2021-12-28 03:15:31,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 03:15:31,707 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.375) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) Word has length 110 [2021-12-28 03:15:31,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:31,708 INFO L225 Difference]: With dead ends: 139 [2021-12-28 03:15:31,708 INFO L226 Difference]: Without dead ends: 137 [2021-12-28 03:15:31,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-12-28 03:15:31,709 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 88 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:31,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 524 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 03:15:31,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-12-28 03:15:31,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2021-12-28 03:15:31,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 88 states have (on average 1.1818181818181819) internal successors, (104), 90 states have internal predecessors, (104), 35 states have call successors, (35), 11 states have call predecessors, (35), 12 states have return successors, (40), 34 states have call predecessors, (40), 34 states have call successors, (40) [2021-12-28 03:15:31,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 179 transitions. [2021-12-28 03:15:31,717 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 179 transitions. Word has length 110 [2021-12-28 03:15:31,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:31,717 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 179 transitions. [2021-12-28 03:15:31,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.375) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2021-12-28 03:15:31,718 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 179 transitions. [2021-12-28 03:15:31,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-28 03:15:31,718 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:31,718 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:15:31,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 03:15:31,719 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:31,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:31,719 INFO L85 PathProgramCache]: Analyzing trace with hash 2136545501, now seen corresponding path program 1 times [2021-12-28 03:15:31,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:31,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686243878] [2021-12-28 03:15:31,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:31,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:31,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:31,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:15:31,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:31,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:15:31,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:31,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:15:31,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:31,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:31,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:31,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 03:15:31,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:31,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 03:15:31,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:31,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 03:15:31,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:31,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-28 03:15:31,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:31,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-28 03:15:31,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:32,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-28 03:15:32,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:32,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-28 03:15:32,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:32,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-28 03:15:32,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:32,066 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 42 proven. 6 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-28 03:15:32,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:32,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686243878] [2021-12-28 03:15:32,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686243878] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:15:32,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524993458] [2021-12-28 03:15:32,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:32,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:32,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:15:32,068 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) [2021-12-28 03:15:32,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-28 03:15:32,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:32,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 2700 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-28 03:15:32,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:15:36,718 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-12-28 03:15:36,718 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:15:36,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524993458] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:15:36,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:15:36,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2021-12-28 03:15:36,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963805868] [2021-12-28 03:15:36,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:15:36,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 03:15:36,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:36,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 03:15:36,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=126, Unknown=2, NotChecked=0, Total=156 [2021-12-28 03:15:36,720 INFO L87 Difference]: Start difference. First operand 136 states and 179 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2021-12-28 03:15:36,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:36,847 INFO L93 Difference]: Finished difference Result 263 states and 361 transitions. [2021-12-28 03:15:36,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 03:15:36,847 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) Word has length 114 [2021-12-28 03:15:36,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:36,848 INFO L225 Difference]: With dead ends: 263 [2021-12-28 03:15:36,848 INFO L226 Difference]: Without dead ends: 152 [2021-12-28 03:15:36,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=34, Invalid=146, Unknown=2, NotChecked=0, Total=182 [2021-12-28 03:15:36,849 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 23 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:36,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 571 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2021-12-28 03:15:36,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-12-28 03:15:36,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 141. [2021-12-28 03:15:36,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 93 states have (on average 1.1935483870967742) internal successors, (111), 95 states have internal predecessors, (111), 35 states have call successors, (35), 11 states have call predecessors, (35), 12 states have return successors, (40), 34 states have call predecessors, (40), 34 states have call successors, (40) [2021-12-28 03:15:36,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 186 transitions. [2021-12-28 03:15:36,857 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 186 transitions. Word has length 114 [2021-12-28 03:15:36,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:36,858 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 186 transitions. [2021-12-28 03:15:36,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2021-12-28 03:15:36,858 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 186 transitions. [2021-12-28 03:15:36,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-28 03:15:36,859 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:36,859 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:15:36,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-28 03:15:37,083 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 [2021-12-28 03:15:37,083 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:37,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:37,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1900256357, now seen corresponding path program 1 times [2021-12-28 03:15:37,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:37,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987855563] [2021-12-28 03:15:37,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:37,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:37,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:37,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:15:37,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:37,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:15:37,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:37,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:15:37,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:37,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:37,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:37,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 03:15:37,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:37,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 03:15:37,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:37,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 03:15:37,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:37,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-28 03:15:37,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:37,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-28 03:15:37,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:37,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-28 03:15:37,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:37,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-28 03:15:37,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:37,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-28 03:15:37,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:37,527 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-12-28 03:15:37,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:37,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987855563] [2021-12-28 03:15:37,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987855563] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:15:37,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358127194] [2021-12-28 03:15:37,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:37,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:37,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:15:37,529 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) [2021-12-28 03:15:37,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-28 03:15:37,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:37,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 2695 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-28 03:15:37,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:15:38,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-28 03:15:38,392 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-28 03:15:38,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:15:38,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358127194] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:15:38,392 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:15:38,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [11] total 21 [2021-12-28 03:15:38,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567614547] [2021-12-28 03:15:38,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:15:38,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-28 03:15:38,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:38,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-28 03:15:38,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-12-28 03:15:38,393 INFO L87 Difference]: Start difference. First operand 141 states and 186 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 10 states have internal predecessors, (57), 5 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-12-28 03:15:38,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:38,487 INFO L93 Difference]: Finished difference Result 280 states and 371 transitions. [2021-12-28 03:15:38,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-28 03:15:38,487 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 10 states have internal predecessors, (57), 5 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 114 [2021-12-28 03:15:38,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:38,488 INFO L225 Difference]: With dead ends: 280 [2021-12-28 03:15:38,489 INFO L226 Difference]: Without dead ends: 160 [2021-12-28 03:15:38,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-12-28 03:15:38,489 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 32 mSDsluCounter, 865 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1025 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:38,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 1025 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 45 Invalid, 0 Unknown, 88 Unchecked, 0.1s Time] [2021-12-28 03:15:38,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-12-28 03:15:38,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2021-12-28 03:15:38,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 111 states have (on average 1.2072072072072073) internal successors, (134), 113 states have internal predecessors, (134), 35 states have call successors, (35), 12 states have call predecessors, (35), 13 states have return successors, (40), 34 states have call predecessors, (40), 34 states have call successors, (40) [2021-12-28 03:15:38,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 209 transitions. [2021-12-28 03:15:38,503 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 209 transitions. Word has length 114 [2021-12-28 03:15:38,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:38,504 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 209 transitions. [2021-12-28 03:15:38,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 10 states have internal predecessors, (57), 5 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-12-28 03:15:38,504 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 209 transitions. [2021-12-28 03:15:38,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-28 03:15:38,505 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:38,506 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:15:38,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-28 03:15:38,711 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 [2021-12-28 03:15:38,712 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:38,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:38,712 INFO L85 PathProgramCache]: Analyzing trace with hash -333498407, now seen corresponding path program 1 times [2021-12-28 03:15:38,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:38,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699397773] [2021-12-28 03:15:38,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:38,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:38,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:38,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:15:38,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:38,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:15:38,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:38,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:15:38,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:38,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:38,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:38,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 03:15:38,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:38,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 03:15:38,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:38,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 03:15:38,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:38,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-28 03:15:38,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:38,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-28 03:15:38,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:38,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-28 03:15:38,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:38,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-28 03:15:38,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:38,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-28 03:15:38,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:38,898 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-12-28 03:15:38,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:38,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699397773] [2021-12-28 03:15:38,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699397773] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:15:38,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760251590] [2021-12-28 03:15:38,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:38,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:38,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:15:38,901 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) [2021-12-28 03:15:38,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-28 03:15:39,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:39,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 2690 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 03:15:39,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:15:39,441 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-28 03:15:39,441 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:15:39,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760251590] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:15:39,441 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:15:39,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-12-28 03:15:39,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41297691] [2021-12-28 03:15:39,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:15:39,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 03:15:39,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:39,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 03:15:39,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:15:39,443 INFO L87 Difference]: Start difference. First operand 160 states and 209 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-28 03:15:39,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:39,466 INFO L93 Difference]: Finished difference Result 289 states and 389 transitions. [2021-12-28 03:15:39,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 03:15:39,466 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 114 [2021-12-28 03:15:39,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:39,468 INFO L225 Difference]: With dead ends: 289 [2021-12-28 03:15:39,468 INFO L226 Difference]: Without dead ends: 169 [2021-12-28 03:15:39,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-28 03:15:39,470 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 20 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 487 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 [2021-12-28 03:15:39,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 487 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:15:39,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-12-28 03:15:39,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 152. [2021-12-28 03:15:39,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 104 states have (on average 1.2019230769230769) internal successors, (125), 105 states have internal predecessors, (125), 35 states have call successors, (35), 12 states have call predecessors, (35), 12 states have return successors, (39), 34 states have call predecessors, (39), 34 states have call successors, (39) [2021-12-28 03:15:39,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 199 transitions. [2021-12-28 03:15:39,484 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 199 transitions. Word has length 114 [2021-12-28 03:15:39,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:39,484 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 199 transitions. [2021-12-28 03:15:39,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-28 03:15:39,485 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 199 transitions. [2021-12-28 03:15:39,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-28 03:15:39,485 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:39,486 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:15:39,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-28 03:15:39,703 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 [2021-12-28 03:15:39,703 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:39,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:39,704 INFO L85 PathProgramCache]: Analyzing trace with hash -320167147, now seen corresponding path program 2 times [2021-12-28 03:15:39,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:39,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788608133] [2021-12-28 03:15:39,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:39,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:39,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:39,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:15:39,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:39,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:15:39,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:39,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:15:39,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:39,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:39,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:39,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 03:15:39,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:39,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 03:15:39,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:39,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 03:15:39,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:39,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-28 03:15:39,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:39,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-28 03:15:39,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:39,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-28 03:15:39,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:39,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-28 03:15:39,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:39,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-28 03:15:39,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:39,968 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-28 03:15:39,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:39,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788608133] [2021-12-28 03:15:39,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788608133] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:15:39,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176202492] [2021-12-28 03:15:39,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 03:15:39,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:39,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:15:39,971 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) [2021-12-28 03:15:40,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-28 03:15:40,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 03:15:40,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:15:40,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 2702 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-28 03:15:40,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:15:41,434 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 85 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-28 03:15:41,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:15:41,949 INFO L353 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-12-28 03:15:41,949 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2021-12-28 03:15:41,956 INFO L353 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-12-28 03:15:41,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2021-12-28 03:15:42,059 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 44 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-28 03:15:42,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176202492] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:15:42,060 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:15:42,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 11] total 26 [2021-12-28 03:15:42,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181533880] [2021-12-28 03:15:42,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:15:42,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-28 03:15:42,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:42,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-28 03:15:42,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-12-28 03:15:42,065 INFO L87 Difference]: Start difference. First operand 152 states and 199 transitions. Second operand has 26 states, 25 states have (on average 4.28) internal successors, (107), 24 states have internal predecessors, (107), 4 states have call successors, (26), 4 states have call predecessors, (26), 7 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-12-28 03:15:44,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:44,206 INFO L93 Difference]: Finished difference Result 346 states and 468 transitions. [2021-12-28 03:15:44,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-28 03:15:44,207 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 4.28) internal successors, (107), 24 states have internal predecessors, (107), 4 states have call successors, (26), 4 states have call predecessors, (26), 7 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) Word has length 118 [2021-12-28 03:15:44,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:44,212 INFO L225 Difference]: With dead ends: 346 [2021-12-28 03:15:44,212 INFO L226 Difference]: Without dead ends: 226 [2021-12-28 03:15:44,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 245 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=442, Invalid=2750, Unknown=0, NotChecked=0, Total=3192 [2021-12-28 03:15:44,228 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 271 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 2008 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 942 SdHoareTripleChecker+Invalid, 2435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 2008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 348 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:44,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 942 Invalid, 2435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 2008 Invalid, 0 Unknown, 348 Unchecked, 1.1s Time] [2021-12-28 03:15:44,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-12-28 03:15:44,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 192. [2021-12-28 03:15:44,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 138 states have (on average 1.210144927536232) internal successors, (167), 140 states have internal predecessors, (167), 38 states have call successors, (38), 14 states have call predecessors, (38), 15 states have return successors, (48), 37 states have call predecessors, (48), 37 states have call successors, (48) [2021-12-28 03:15:44,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 253 transitions. [2021-12-28 03:15:44,253 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 253 transitions. Word has length 118 [2021-12-28 03:15:44,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:44,254 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 253 transitions. [2021-12-28 03:15:44,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 4.28) internal successors, (107), 24 states have internal predecessors, (107), 4 states have call successors, (26), 4 states have call predecessors, (26), 7 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-12-28 03:15:44,254 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 253 transitions. [2021-12-28 03:15:44,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-28 03:15:44,255 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:44,255 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:15:44,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-28 03:15:44,475 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 [2021-12-28 03:15:44,476 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:44,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:44,476 INFO L85 PathProgramCache]: Analyzing trace with hash -916454254, now seen corresponding path program 1 times [2021-12-28 03:15:44,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:44,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281334633] [2021-12-28 03:15:44,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:44,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:44,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:44,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:15:44,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:44,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:15:44,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:44,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:15:44,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:44,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:44,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:44,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 03:15:44,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:44,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-28 03:15:44,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:44,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-28 03:15:44,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:44,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-28 03:15:44,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:44,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-28 03:15:44,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:44,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-28 03:15:44,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:44,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-28 03:15:44,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:44,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-28 03:15:44,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:44,664 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-12-28 03:15:44,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:44,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281334633] [2021-12-28 03:15:44,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281334633] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:15:44,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844733480] [2021-12-28 03:15:44,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:44,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:44,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:15:44,674 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) [2021-12-28 03:15:44,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-28 03:15:45,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:45,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 2702 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 03:15:45,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:15:45,228 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-12-28 03:15:45,228 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:15:45,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844733480] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:15:45,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:15:45,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-12-28 03:15:45,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852186661] [2021-12-28 03:15:45,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:15:45,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 03:15:45,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:45,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 03:15:45,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:15:45,230 INFO L87 Difference]: Start difference. First operand 192 states and 253 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-28 03:15:45,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:45,250 INFO L93 Difference]: Finished difference Result 365 states and 490 transitions. [2021-12-28 03:15:45,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 03:15:45,251 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 120 [2021-12-28 03:15:45,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:45,255 INFO L225 Difference]: With dead ends: 365 [2021-12-28 03:15:45,255 INFO L226 Difference]: Without dead ends: 203 [2021-12-28 03:15:45,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-28 03:15:45,259 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 9 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:45,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 480 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:15:45,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-12-28 03:15:45,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 194. [2021-12-28 03:15:45,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 140 states have (on average 1.1928571428571428) internal successors, (167), 142 states have internal predecessors, (167), 38 states have call successors, (38), 14 states have call predecessors, (38), 15 states have return successors, (48), 37 states have call predecessors, (48), 37 states have call successors, (48) [2021-12-28 03:15:45,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 253 transitions. [2021-12-28 03:15:45,283 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 253 transitions. Word has length 120 [2021-12-28 03:15:45,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:45,283 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 253 transitions. [2021-12-28 03:15:45,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-28 03:15:45,284 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 253 transitions. [2021-12-28 03:15:45,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-28 03:15:45,285 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:45,285 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:15:45,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-28 03:15:45,503 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 [2021-12-28 03:15:45,503 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:45,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:45,504 INFO L85 PathProgramCache]: Analyzing trace with hash -915873842, now seen corresponding path program 1 times [2021-12-28 03:15:45,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:45,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496054716] [2021-12-28 03:15:45,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:45,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:45,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:45,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:15:45,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:45,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:15:45,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:45,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:15:45,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:45,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:45,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:45,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 03:15:45,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:45,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-28 03:15:45,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:45,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-28 03:15:45,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:45,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-28 03:15:45,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:45,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-28 03:15:45,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:45,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-28 03:15:45,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:45,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-28 03:15:45,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:45,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-28 03:15:45,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:45,650 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-28 03:15:45,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:45,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496054716] [2021-12-28 03:15:45,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496054716] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:15:45,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198615427] [2021-12-28 03:15:45,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:45,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:45,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:15:45,664 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) [2021-12-28 03:15:45,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-28 03:15:46,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:46,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 2704 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 03:15:46,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:15:46,257 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-12-28 03:15:46,257 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:15:46,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198615427] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:15:46,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:15:46,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-12-28 03:15:46,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763951539] [2021-12-28 03:15:46,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:15:46,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 03:15:46,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:46,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 03:15:46,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:15:46,258 INFO L87 Difference]: Start difference. First operand 194 states and 253 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-28 03:15:46,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:46,285 INFO L93 Difference]: Finished difference Result 372 states and 502 transitions. [2021-12-28 03:15:46,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 03:15:46,285 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 120 [2021-12-28 03:15:46,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:46,286 INFO L225 Difference]: With dead ends: 372 [2021-12-28 03:15:46,286 INFO L226 Difference]: Without dead ends: 208 [2021-12-28 03:15:46,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-28 03:15:46,287 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 34 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 478 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 [2021-12-28 03:15:46,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 478 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:15:46,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-12-28 03:15:46,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 190. [2021-12-28 03:15:46,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 136 states have (on average 1.1691176470588236) internal successors, (159), 138 states have internal predecessors, (159), 38 states have call successors, (38), 14 states have call predecessors, (38), 15 states have return successors, (48), 37 states have call predecessors, (48), 37 states have call successors, (48) [2021-12-28 03:15:46,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 245 transitions. [2021-12-28 03:15:46,294 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 245 transitions. Word has length 120 [2021-12-28 03:15:46,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:46,294 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 245 transitions. [2021-12-28 03:15:46,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-28 03:15:46,295 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 245 transitions. [2021-12-28 03:15:46,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-28 03:15:46,295 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:46,295 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:15:46,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-28 03:15:46,510 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 [2021-12-28 03:15:46,511 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:46,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:46,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1910567540, now seen corresponding path program 2 times [2021-12-28 03:15:46,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:46,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626872258] [2021-12-28 03:15:46,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:46,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:46,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:46,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:15:46,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:46,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:15:46,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:46,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:15:46,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:46,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:46,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:46,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 03:15:46,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:46,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-28 03:15:46,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:46,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-28 03:15:46,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:46,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-28 03:15:46,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:46,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-28 03:15:46,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:46,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-28 03:15:46,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:46,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-28 03:15:46,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:46,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-28 03:15:46,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:46,985 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 44 proven. 8 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-28 03:15:46,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:46,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626872258] [2021-12-28 03:15:46,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626872258] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:15:46,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534000374] [2021-12-28 03:15:46,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 03:15:46,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:46,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:15:46,988 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) [2021-12-28 03:15:47,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-28 03:15:47,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 03:15:47,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:15:47,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 2699 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-28 03:15:47,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:15:48,337 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 83 proven. 6 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-28 03:15:48,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:15:48,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-12-28 03:15:48,718 INFO L353 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-12-28 03:15:48,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2021-12-28 03:15:48,802 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 44 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-28 03:15:48,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534000374] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:15:48,802 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:15:48,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 24 [2021-12-28 03:15:48,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003839136] [2021-12-28 03:15:48,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:15:48,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-28 03:15:48,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:48,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-28 03:15:48,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-12-28 03:15:48,805 INFO L87 Difference]: Start difference. First operand 190 states and 245 transitions. Second operand has 24 states, 24 states have (on average 4.208333333333333) internal successors, (101), 23 states have internal predecessors, (101), 3 states have call successors, (18), 4 states have call predecessors, (18), 5 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-28 03:15:50,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:50,295 INFO L93 Difference]: Finished difference Result 339 states and 433 transitions. [2021-12-28 03:15:50,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-28 03:15:50,295 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.208333333333333) internal successors, (101), 23 states have internal predecessors, (101), 3 states have call successors, (18), 4 states have call predecessors, (18), 5 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 120 [2021-12-28 03:15:50,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:50,296 INFO L225 Difference]: With dead ends: 339 [2021-12-28 03:15:50,296 INFO L226 Difference]: Without dead ends: 244 [2021-12-28 03:15:50,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 247 SyntacticMatches, 14 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=314, Invalid=1168, Unknown=0, NotChecked=0, Total=1482 [2021-12-28 03:15:50,297 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 322 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 1241 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 1533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:50,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 579 Invalid, 1533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1241 Invalid, 0 Unknown, 222 Unchecked, 0.9s Time] [2021-12-28 03:15:50,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-12-28 03:15:50,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 225. [2021-12-28 03:15:50,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 165 states have (on average 1.1696969696969697) internal successors, (193), 168 states have internal predecessors, (193), 41 states have call successors, (41), 16 states have call predecessors, (41), 18 states have return successors, (58), 40 states have call predecessors, (58), 40 states have call successors, (58) [2021-12-28 03:15:50,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 292 transitions. [2021-12-28 03:15:50,305 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 292 transitions. Word has length 120 [2021-12-28 03:15:50,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:50,306 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 292 transitions. [2021-12-28 03:15:50,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.208333333333333) internal successors, (101), 23 states have internal predecessors, (101), 3 states have call successors, (18), 4 states have call predecessors, (18), 5 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-28 03:15:50,306 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 292 transitions. [2021-12-28 03:15:50,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-28 03:15:50,307 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:50,307 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 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] [2021-12-28 03:15:50,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-28 03:15:50,528 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 [2021-12-28 03:15:50,528 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:50,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:50,528 INFO L85 PathProgramCache]: Analyzing trace with hash 537886416, now seen corresponding path program 1 times [2021-12-28 03:15:50,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:50,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198457455] [2021-12-28 03:15:50,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:50,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:50,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:50,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:15:50,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:50,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:15:50,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:50,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:15:50,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:50,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:50,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:50,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 03:15:50,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:50,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-28 03:15:50,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:50,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-28 03:15:50,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:50,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-28 03:15:50,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:50,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-28 03:15:50,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:50,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-28 03:15:50,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:50,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-28 03:15:50,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:50,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-28 03:15:50,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:50,898 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 44 proven. 8 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-28 03:15:50,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:50,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198457455] [2021-12-28 03:15:50,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198457455] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:15:50,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025607511] [2021-12-28 03:15:50,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:50,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:50,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:15:50,900 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) [2021-12-28 03:15:50,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-28 03:15:51,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:51,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 2701 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-28 03:15:51,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:15:51,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-28 03:15:51,593 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-28 03:15:51,593 INFO L387 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 17 treesize of output 23 [2021-12-28 03:15:51,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-12-28 03:15:51,670 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-28 03:15:51,671 INFO L387 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 21 treesize of output 27 [2021-12-28 03:15:51,677 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-12-28 03:15:51,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-12-28 03:15:52,515 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 55 proven. 58 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-28 03:15:52,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:15:52,983 INFO L353 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-12-28 03:15:52,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2021-12-28 03:15:53,122 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 44 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-28 03:15:53,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025607511] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:15:53,122 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:15:53,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 23, 12] total 41 [2021-12-28 03:15:53,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458240943] [2021-12-28 03:15:53,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:15:53,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-28 03:15:53,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:53,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-28 03:15:53,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1494, Unknown=0, NotChecked=0, Total=1640 [2021-12-28 03:15:53,128 INFO L87 Difference]: Start difference. First operand 225 states and 292 transitions. Second operand has 41 states, 39 states have (on average 4.17948717948718) internal successors, (163), 38 states have internal predecessors, (163), 11 states have call successors, (30), 6 states have call predecessors, (30), 10 states have return successors, (27), 10 states have call predecessors, (27), 9 states have call successors, (27) [2021-12-28 03:15:57,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:57,937 INFO L93 Difference]: Finished difference Result 564 states and 773 transitions. [2021-12-28 03:15:57,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-12-28 03:15:57,937 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 4.17948717948718) internal successors, (163), 38 states have internal predecessors, (163), 11 states have call successors, (30), 6 states have call predecessors, (30), 10 states have return successors, (27), 10 states have call predecessors, (27), 9 states have call successors, (27) Word has length 120 [2021-12-28 03:15:57,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:57,942 INFO L225 Difference]: With dead ends: 564 [2021-12-28 03:15:57,942 INFO L226 Difference]: Without dead ends: 385 [2021-12-28 03:15:57,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 248 SyntacticMatches, 8 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2652 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=959, Invalid=8941, Unknown=0, NotChecked=0, Total=9900 [2021-12-28 03:15:57,948 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 479 mSDsluCounter, 1360 mSDsCounter, 0 mSdLazyCounter, 4420 mSolverCounterSat, 382 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 1538 SdHoareTripleChecker+Invalid, 6105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 382 IncrementalHoareTripleChecker+Valid, 4420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1303 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:57,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [508 Valid, 1538 Invalid, 6105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [382 Valid, 4420 Invalid, 0 Unknown, 1303 Unchecked, 2.7s Time] [2021-12-28 03:15:57,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-12-28 03:15:57,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 295. [2021-12-28 03:15:57,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 204 states have (on average 1.1568627450980393) internal successors, (236), 206 states have internal predecessors, (236), 67 states have call successors, (67), 22 states have call predecessors, (67), 23 states have return successors, (100), 66 states have call predecessors, (100), 66 states have call successors, (100) [2021-12-28 03:15:57,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 403 transitions. [2021-12-28 03:15:57,976 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 403 transitions. Word has length 120 [2021-12-28 03:15:57,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:57,976 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 403 transitions. [2021-12-28 03:15:57,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 4.17948717948718) internal successors, (163), 38 states have internal predecessors, (163), 11 states have call successors, (30), 6 states have call predecessors, (30), 10 states have return successors, (27), 10 states have call predecessors, (27), 9 states have call successors, (27) [2021-12-28 03:15:57,977 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 403 transitions. [2021-12-28 03:15:57,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-28 03:15:57,979 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:57,979 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:15:58,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-28 03:15:58,196 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 [2021-12-28 03:15:58,197 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:58,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:58,197 INFO L85 PathProgramCache]: Analyzing trace with hash 190117968, now seen corresponding path program 3 times [2021-12-28 03:15:58,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:58,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779960240] [2021-12-28 03:15:58,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:58,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:58,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:58,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:15:58,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:58,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:15:58,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:58,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:15:58,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:58,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:58,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:58,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 03:15:58,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:58,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-28 03:15:58,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:58,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-28 03:15:58,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:58,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-28 03:15:58,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:58,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-28 03:15:58,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:58,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-28 03:15:58,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:58,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-28 03:15:58,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:58,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-28 03:15:58,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:58,533 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-12-28 03:15:58,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:58,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779960240] [2021-12-28 03:15:58,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779960240] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:15:58,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529143788] [2021-12-28 03:15:58,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-28 03:15:58,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:58,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:15:58,536 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) [2021-12-28 03:15:58,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-28 03:15:59,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-28 03:15:59,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:15:59,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 2425 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-28 03:15:59,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:15:59,721 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-28 03:15:59,722 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:15:59,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529143788] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:15:59,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:15:59,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 11 [2021-12-28 03:15:59,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522678975] [2021-12-28 03:15:59,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:15:59,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 03:15:59,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:59,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 03:15:59,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-28 03:15:59,723 INFO L87 Difference]: Start difference. First operand 295 states and 403 transitions. Second operand has 9 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-28 03:15:59,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:59,825 INFO L93 Difference]: Finished difference Result 450 states and 613 transitions. [2021-12-28 03:15:59,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 03:15:59,826 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 124 [2021-12-28 03:15:59,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:59,827 INFO L225 Difference]: With dead ends: 450 [2021-12-28 03:15:59,827 INFO L226 Difference]: Without dead ends: 252 [2021-12-28 03:15:59,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-12-28 03:15:59,828 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 12 mSDsluCounter, 1073 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1234 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:59,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1234 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 03:15:59,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-12-28 03:15:59,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 196. [2021-12-28 03:15:59,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 139 states have (on average 1.1366906474820144) internal successors, (158), 142 states have internal predecessors, (158), 39 states have call successors, (39), 15 states have call predecessors, (39), 17 states have return successors, (48), 38 states have call predecessors, (48), 38 states have call successors, (48) [2021-12-28 03:15:59,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 245 transitions. [2021-12-28 03:15:59,838 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 245 transitions. Word has length 124 [2021-12-28 03:15:59,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:59,838 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 245 transitions. [2021-12-28 03:15:59,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-28 03:15:59,838 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 245 transitions. [2021-12-28 03:15:59,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-28 03:15:59,839 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:59,839 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:15:59,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-28 03:16:00,055 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 [2021-12-28 03:16:00,056 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:16:00,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:16:00,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1217265071, now seen corresponding path program 1 times [2021-12-28 03:16:00,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:16:00,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788334701] [2021-12-28 03:16:00,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:16:00,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:16:00,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:00,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:16:00,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:00,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:16:00,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:00,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:16:00,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:00,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:16:00,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:00,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 03:16:00,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:00,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-28 03:16:00,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:00,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-28 03:16:00,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:00,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-28 03:16:00,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:00,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-28 03:16:00,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:00,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:16:00,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:00,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 03:16:00,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:00,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-28 03:16:00,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:00,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 03:16:00,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:00,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 03:16:00,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:00,228 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-12-28 03:16:00,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:16:00,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788334701] [2021-12-28 03:16:00,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788334701] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:16:00,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:16:00,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 03:16:00,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186260683] [2021-12-28 03:16:00,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:16:00,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 03:16:00,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:16:00,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 03:16:00,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 03:16:00,230 INFO L87 Difference]: Start difference. First operand 196 states and 245 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2021-12-28 03:16:00,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:16:00,642 INFO L93 Difference]: Finished difference Result 273 states and 342 transitions. [2021-12-28 03:16:00,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 03:16:00,643 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) Word has length 127 [2021-12-28 03:16:00,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:16:00,644 INFO L225 Difference]: With dead ends: 273 [2021-12-28 03:16:00,644 INFO L226 Difference]: Without dead ends: 224 [2021-12-28 03:16:00,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-28 03:16:00,644 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 136 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 03:16:00,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 387 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 03:16:00,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-12-28 03:16:00,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 201. [2021-12-28 03:16:00,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 143 states have (on average 1.132867132867133) internal successors, (162), 146 states have internal predecessors, (162), 39 states have call successors, (39), 15 states have call predecessors, (39), 18 states have return successors, (49), 39 states have call predecessors, (49), 38 states have call successors, (49) [2021-12-28 03:16:00,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 250 transitions. [2021-12-28 03:16:00,671 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 250 transitions. Word has length 127 [2021-12-28 03:16:00,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:16:00,671 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 250 transitions. [2021-12-28 03:16:00,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2021-12-28 03:16:00,672 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 250 transitions. [2021-12-28 03:16:00,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-28 03:16:00,673 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:16:00,673 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:16:00,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-28 03:16:00,673 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:16:00,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:16:00,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1186127173, now seen corresponding path program 4 times [2021-12-28 03:16:00,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:16:00,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203365491] [2021-12-28 03:16:00,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:16:00,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:16:00,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:00,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:16:00,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:00,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:16:00,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:00,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:16:00,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:00,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:16:00,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:00,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 03:16:00,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:00,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-28 03:16:00,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:00,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-28 03:16:00,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:00,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-28 03:16:00,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:00,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-28 03:16:00,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:01,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-28 03:16:01,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:01,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-28 03:16:01,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:01,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-28 03:16:01,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:01,101 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 26 proven. 14 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-28 03:16:01,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:16:01,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203365491] [2021-12-28 03:16:01,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203365491] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:16:01,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534993567] [2021-12-28 03:16:01,102 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-28 03:16:01,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:16:01,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:16:01,104 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) [2021-12-28 03:16:01,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-28 03:16:01,554 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-28 03:16:01,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:16:01,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 2713 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-28 03:16:01,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:16:01,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 03:16:01,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 03:16:01,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-28 03:16:02,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 03:16:02,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-28 03:16:02,551 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 60 proven. 39 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-28 03:16:02,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:16:03,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534993567] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:16:03,863 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 03:16:03,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16] total 23 [2021-12-28 03:16:03,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474701551] [2021-12-28 03:16:03,863 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 03:16:03,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-28 03:16:03,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:16:03,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-28 03:16:03,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=784, Unknown=1, NotChecked=0, Total=870 [2021-12-28 03:16:03,865 INFO L87 Difference]: Start difference. First operand 201 states and 250 transitions. Second operand has 23 states, 21 states have (on average 6.428571428571429) internal successors, (135), 20 states have internal predecessors, (135), 10 states have call successors, (26), 6 states have call predecessors, (26), 5 states have return successors, (23), 8 states have call predecessors, (23), 9 states have call successors, (23) [2021-12-28 03:16:06,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:16:06,177 INFO L93 Difference]: Finished difference Result 494 states and 667 transitions. [2021-12-28 03:16:06,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-28 03:16:06,178 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 6.428571428571429) internal successors, (135), 20 states have internal predecessors, (135), 10 states have call successors, (26), 6 states have call predecessors, (26), 5 states have return successors, (23), 8 states have call predecessors, (23), 9 states have call successors, (23) Word has length 126 [2021-12-28 03:16:06,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:16:06,180 INFO L225 Difference]: With dead ends: 494 [2021-12-28 03:16:06,180 INFO L226 Difference]: Without dead ends: 383 [2021-12-28 03:16:06,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 182 SyntacticMatches, 13 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=425, Invalid=3734, Unknown=1, NotChecked=0, Total=4160 [2021-12-28 03:16:06,181 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 191 mSDsluCounter, 1161 mSDsCounter, 0 mSdLazyCounter, 2499 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 1390 SdHoareTripleChecker+Invalid, 3105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 2499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 480 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-28 03:16:06,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 1390 Invalid, 3105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 2499 Invalid, 0 Unknown, 480 Unchecked, 1.4s Time] [2021-12-28 03:16:06,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-12-28 03:16:06,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 328. [2021-12-28 03:16:06,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 238 states have (on average 1.1512605042016806) internal successors, (274), 247 states have internal predecessors, (274), 61 states have call successors, (61), 21 states have call predecessors, (61), 28 states have return successors, (101), 59 states have call predecessors, (101), 60 states have call successors, (101) [2021-12-28 03:16:06,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 436 transitions. [2021-12-28 03:16:06,215 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 436 transitions. Word has length 126 [2021-12-28 03:16:06,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:16:06,216 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 436 transitions. [2021-12-28 03:16:06,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 6.428571428571429) internal successors, (135), 20 states have internal predecessors, (135), 10 states have call successors, (26), 6 states have call predecessors, (26), 5 states have return successors, (23), 8 states have call predecessors, (23), 9 states have call successors, (23) [2021-12-28 03:16:06,217 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 436 transitions. [2021-12-28 03:16:06,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-28 03:16:06,218 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:16:06,218 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:16:06,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-28 03:16:06,431 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,SelfDestructingSolverStorable15 [2021-12-28 03:16:06,431 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:16:06,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:16:06,432 INFO L85 PathProgramCache]: Analyzing trace with hash -967272455, now seen corresponding path program 1 times [2021-12-28 03:16:06,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:16:06,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326647350] [2021-12-28 03:16:06,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:16:06,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:16:06,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:06,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:16:06,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:06,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:16:06,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:06,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:16:06,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:06,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:16:06,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:06,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 03:16:06,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:06,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-28 03:16:06,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:06,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-28 03:16:06,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:06,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-28 03:16:06,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:07,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-28 03:16:07,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:07,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-28 03:16:07,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:07,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-28 03:16:07,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:07,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-28 03:16:07,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:07,025 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-12-28 03:16:07,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:16:07,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326647350] [2021-12-28 03:16:07,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326647350] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:16:07,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364778793] [2021-12-28 03:16:07,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:16:07,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:16:07,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:16:07,041 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) [2021-12-28 03:16:07,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-28 03:16:07,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:07,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 2718 conjuncts, 80 conjunts are in the unsatisfiable core [2021-12-28 03:16:07,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:16:07,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-28 03:16:11,791 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-28 03:16:11,791 INFO L387 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 17 treesize of output 23 [2021-12-28 03:16:11,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-12-28 03:16:11,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-12-28 03:16:12,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 03:16:18,603 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 37 proven. 85 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-28 03:16:18,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:16:19,066 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 50 proven. 14 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-28 03:16:19,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364778793] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:16:19,066 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:16:19,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 24, 9] total 42 [2021-12-28 03:16:19,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300299153] [2021-12-28 03:16:19,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:16:19,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-28 03:16:19,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:16:19,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-28 03:16:19,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1579, Unknown=2, NotChecked=0, Total=1722 [2021-12-28 03:16:19,068 INFO L87 Difference]: Start difference. First operand 328 states and 436 transitions. Second operand has 42 states, 38 states have (on average 4.657894736842105) internal successors, (177), 38 states have internal predecessors, (177), 16 states have call successors, (39), 6 states have call predecessors, (39), 10 states have return successors, (35), 14 states have call predecessors, (35), 15 states have call successors, (35) [2021-12-28 03:16:21,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:16:21,779 INFO L93 Difference]: Finished difference Result 663 states and 872 transitions. [2021-12-28 03:16:21,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-28 03:16:21,779 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 38 states have (on average 4.657894736842105) internal successors, (177), 38 states have internal predecessors, (177), 16 states have call successors, (39), 6 states have call predecessors, (39), 10 states have return successors, (35), 14 states have call predecessors, (35), 15 states have call successors, (35) Word has length 126 [2021-12-28 03:16:21,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:16:21,781 INFO L225 Difference]: With dead ends: 663 [2021-12-28 03:16:21,781 INFO L226 Difference]: Without dead ends: 429 [2021-12-28 03:16:21,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 247 SyntacticMatches, 7 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1709 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=506, Invalid=5192, Unknown=2, NotChecked=0, Total=5700 [2021-12-28 03:16:21,784 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 337 mSDsluCounter, 1131 mSDsCounter, 0 mSdLazyCounter, 3330 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 4247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 3330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 655 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-28 03:16:21,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 1296 Invalid, 4247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 3330 Invalid, 0 Unknown, 655 Unchecked, 1.8s Time] [2021-12-28 03:16:21,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-12-28 03:16:21,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 340. [2021-12-28 03:16:21,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 249 states have (on average 1.1485943775100402) internal successors, (286), 258 states have internal predecessors, (286), 60 states have call successors, (60), 23 states have call predecessors, (60), 30 states have return successors, (104), 58 states have call predecessors, (104), 59 states have call successors, (104) [2021-12-28 03:16:21,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 450 transitions. [2021-12-28 03:16:21,801 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 450 transitions. Word has length 126 [2021-12-28 03:16:21,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:16:21,802 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 450 transitions. [2021-12-28 03:16:21,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 38 states have (on average 4.657894736842105) internal successors, (177), 38 states have internal predecessors, (177), 16 states have call successors, (39), 6 states have call predecessors, (39), 10 states have return successors, (35), 14 states have call predecessors, (35), 15 states have call successors, (35) [2021-12-28 03:16:21,802 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 450 transitions. [2021-12-28 03:16:21,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-28 03:16:21,803 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:16:21,803 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:16:21,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-28 03:16:22,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:16:22,039 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:16:22,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:16:22,040 INFO L85 PathProgramCache]: Analyzing trace with hash 242456053, now seen corresponding path program 1 times [2021-12-28 03:16:22,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:16:22,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341791357] [2021-12-28 03:16:22,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:16:22,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:16:22,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:22,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:16:22,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:22,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:16:22,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:22,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:16:22,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:22,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:16:22,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:22,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 03:16:22,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:22,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-28 03:16:22,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:22,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-28 03:16:22,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:22,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-28 03:16:22,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:22,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-28 03:16:22,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:22,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-28 03:16:22,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:22,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-28 03:16:22,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:22,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-28 03:16:22,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:22,257 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-12-28 03:16:22,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:16:22,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341791357] [2021-12-28 03:16:22,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341791357] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:16:22,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757588007] [2021-12-28 03:16:22,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:16:22,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:16:22,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:16:22,258 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:16:22,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-28 03:16:22,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:22,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 2720 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-28 03:16:22,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:16:22,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-28 03:16:22,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 03:16:22,993 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-28 03:16:23,309 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 108 proven. 13 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-28 03:16:23,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:16:25,342 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_aws_byte_buf_write_be16_~#x#1.base_9| Int) (|v_ULTIMATE.start_aws_byte_buf_write_be16_~#x#1.offset_9| Int) (v_ArrVal_1475 Int)) (or (not (= (mod (select (select (store |c_#memory_int| |v_ULTIMATE.start_aws_byte_buf_write_be16_~#x#1.base_9| (store (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_buf_write_be16_~#x#1.base_9|) |v_ULTIMATE.start_aws_byte_buf_write_be16_~#x#1.offset_9| v_ArrVal_1475)) |c_ULTIMATE.start_aws_byte_buf_write_be16_harness_~#buf~3#1.base|) (+ 16 |c_ULTIMATE.start_aws_byte_buf_write_be16_harness_~#buf~3#1.offset|)) 18446744073709551616) 0)) (not (<= |v_ULTIMATE.start_aws_byte_buf_write_be16_~#x#1.offset_9| 0)))) is different from false [2021-12-28 03:16:25,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757588007] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:16:25,372 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 03:16:25,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 23 [2021-12-28 03:16:25,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695060880] [2021-12-28 03:16:25,372 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 03:16:25,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-28 03:16:25,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:16:25,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-28 03:16:25,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=627, Unknown=1, NotChecked=50, Total=756 [2021-12-28 03:16:25,374 INFO L87 Difference]: Start difference. First operand 340 states and 450 transitions. Second operand has 23 states, 20 states have (on average 6.15) internal successors, (123), 21 states have internal predecessors, (123), 8 states have call successors, (25), 4 states have call predecessors, (25), 7 states have return successors, (23), 6 states have call predecessors, (23), 8 states have call successors, (23) [2021-12-28 03:16:26,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:16:26,909 INFO L93 Difference]: Finished difference Result 666 states and 880 transitions. [2021-12-28 03:16:26,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-28 03:16:26,910 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 6.15) internal successors, (123), 21 states have internal predecessors, (123), 8 states have call successors, (25), 4 states have call predecessors, (25), 7 states have return successors, (23), 6 states have call predecessors, (23), 8 states have call successors, (23) Word has length 130 [2021-12-28 03:16:26,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:16:26,912 INFO L225 Difference]: With dead ends: 666 [2021-12-28 03:16:26,912 INFO L226 Difference]: Without dead ends: 346 [2021-12-28 03:16:26,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 216 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=316, Invalid=2657, Unknown=1, NotChecked=106, Total=3080 [2021-12-28 03:16:26,913 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 160 mSDsluCounter, 883 mSDsCounter, 0 mSdLazyCounter, 1847 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 1023 SdHoareTripleChecker+Invalid, 2468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 565 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-28 03:16:26,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 1023 Invalid, 2468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1847 Invalid, 0 Unknown, 565 Unchecked, 0.9s Time] [2021-12-28 03:16:26,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-12-28 03:16:26,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 324. [2021-12-28 03:16:26,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 235 states have (on average 1.1446808510638298) internal successors, (269), 241 states have internal predecessors, (269), 60 states have call successors, (60), 24 states have call predecessors, (60), 28 states have return successors, (94), 58 states have call predecessors, (94), 59 states have call successors, (94) [2021-12-28 03:16:26,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 423 transitions. [2021-12-28 03:16:26,929 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 423 transitions. Word has length 130 [2021-12-28 03:16:26,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:16:26,929 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 423 transitions. [2021-12-28 03:16:26,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 6.15) internal successors, (123), 21 states have internal predecessors, (123), 8 states have call successors, (25), 4 states have call predecessors, (25), 7 states have return successors, (23), 6 states have call predecessors, (23), 8 states have call successors, (23) [2021-12-28 03:16:26,929 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 423 transitions. [2021-12-28 03:16:26,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-28 03:16:26,930 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:16:26,930 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:16:26,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-28 03:16:27,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-28 03:16:27,144 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:16:27,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:16:27,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1901357986, now seen corresponding path program 1 times [2021-12-28 03:16:27,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:16:27,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905099903] [2021-12-28 03:16:27,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:16:27,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:16:27,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:27,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:16:27,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:27,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:16:27,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:27,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:16:27,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:27,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:16:27,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:27,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 03:16:27,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:27,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-28 03:16:27,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:27,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-28 03:16:27,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:27,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-28 03:16:27,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:27,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-28 03:16:27,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:27,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-28 03:16:27,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:27,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-28 03:16:27,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:27,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-28 03:16:27,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:27,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-28 03:16:27,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:27,429 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-12-28 03:16:27,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:16:27,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905099903] [2021-12-28 03:16:27,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905099903] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:16:27,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895219105] [2021-12-28 03:16:27,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:16:27,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:16:27,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:16:27,444 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:16:27,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process