./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_byte_buf_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_byte_buf_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 4c8e70dc7f77f825f3ef2e89303bbf356ceb3a21ef4dcf0b5c90667d3d62b0fd --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 17:03:01,309 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 17:03:01,311 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 17:03:01,369 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 17:03:01,369 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 17:03:01,370 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 17:03:01,372 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 17:03:01,373 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 17:03:01,374 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 17:03:01,375 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 17:03:01,376 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 17:03:01,377 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 17:03:01,377 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 17:03:01,378 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 17:03:01,379 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 17:03:01,384 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 17:03:01,385 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 17:03:01,388 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 17:03:01,391 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 17:03:01,393 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 17:03:01,395 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 17:03:01,396 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 17:03:01,398 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 17:03:01,398 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 17:03:01,402 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 17:03:01,402 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 17:03:01,403 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 17:03:01,407 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 17:03:01,408 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 17:03:01,408 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 17:03:01,409 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 17:03:01,410 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 17:03:01,411 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 17:03:01,412 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 17:03:01,413 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 17:03:01,414 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 17:03:01,414 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 17:03:01,414 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 17:03:01,415 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 17:03:01,415 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 17:03:01,416 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 17:03:01,417 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-14 17:03:01,447 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 17:03:01,450 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 17:03:01,450 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 17:03:01,451 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 17:03:01,451 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 17:03:01,452 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 17:03:01,452 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 17:03:01,452 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 17:03:01,452 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 17:03:01,453 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 17:03:01,453 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 17:03:01,454 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 17:03:01,454 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 17:03:01,454 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 17:03:01,454 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 17:03:01,454 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 17:03:01,454 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 17:03:01,455 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 17:03:01,455 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 17:03:01,455 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 17:03:01,455 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 17:03:01,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 17:03:01,456 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 17:03:01,456 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 17:03:01,456 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 17:03:01,456 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 17:03:01,456 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 17:03:01,456 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 17:03:01,457 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 17:03:01,457 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 17:03:01,457 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 17:03:01,457 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4c8e70dc7f77f825f3ef2e89303bbf356ceb3a21ef4dcf0b5c90667d3d62b0fd [2021-12-14 17:03:01,666 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 17:03:01,682 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 17:03:01,684 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 17:03:01,685 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 17:03:01,686 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 17:03:01,687 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_byte_buf_harness.i [2021-12-14 17:03:01,744 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ece4fed04/729ff631da634ab8a034f8ac7f2650aa/FLAG9f0071e41 [2021-12-14 17:03:02,369 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 17:03:02,370 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_byte_buf_harness.i [2021-12-14 17:03:02,420 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ece4fed04/729ff631da634ab8a034f8ac7f2650aa/FLAG9f0071e41 [2021-12-14 17:03:02,724 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ece4fed04/729ff631da634ab8a034f8ac7f2650aa [2021-12-14 17:03:02,728 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 17:03:02,729 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 17:03:02,731 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 17:03:02,731 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 17:03:02,734 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 17:03:02,734 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:03:02" (1/1) ... [2021-12-14 17:03:02,735 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d642b03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:03:02, skipping insertion in model container [2021-12-14 17:03:02,736 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:03:02" (1/1) ... [2021-12-14 17:03:02,741 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 17:03:02,841 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 17:03:03,096 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_byte_buf_harness.i[4501,4514] [2021-12-14 17:03:03,103 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_byte_buf_harness.i[4561,4574] [2021-12-14 17:03:03,647 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:03:03,654 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:03:03,655 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:03:03,658 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:03:03,659 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:03:03,669 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:03:03,670 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:03:03,672 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:03:03,673 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:03:03,928 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-14 17:03:03,929 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-14 17:03:03,930 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-14 17:03:03,931 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-14 17:03:03,934 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-14 17:03:03,936 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-14 17:03:03,937 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-14 17:03:03,938 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-14 17:03:03,940 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-14 17:03:03,941 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-14 17:03:04,053 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-14 17:03:04,119 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:03:04,124 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:03:04,192 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 17:03:04,245 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 17:03:04,268 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_byte_buf_harness.i[4501,4514] [2021-12-14 17:03:04,270 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_byte_buf_harness.i[4561,4574] [2021-12-14 17:03:04,357 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:03:04,358 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:03:04,359 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:03:04,359 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:03:04,360 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:03:04,382 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:03:04,382 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:03:04,383 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:03:04,383 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:03:04,419 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-14 17:03:04,420 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-14 17:03:04,420 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-14 17:03:04,421 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-14 17:03:04,421 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-14 17:03:04,422 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-14 17:03:04,422 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-14 17:03:04,422 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-14 17:03:04,423 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-14 17:03:04,423 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-14 17:03:04,435 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-14 17:03:04,468 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:03:04,468 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:03:04,485 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 17:03:04,668 INFO L208 MainTranslator]: Completed translation [2021-12-14 17:03:04,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:03:04 WrapperNode [2021-12-14 17:03:04,669 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 17:03:04,670 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 17:03:04,670 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 17:03:04,670 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 17:03:04,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:03:04" (1/1) ... [2021-12-14 17:03:04,758 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:03:04" (1/1) ... [2021-12-14 17:03:04,833 INFO L137 Inliner]: procedures = 691, calls = 2651, calls flagged for inlining = 65, calls inlined = 11, statements flattened = 934 [2021-12-14 17:03:04,839 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 17:03:04,840 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 17:03:04,840 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 17:03:04,840 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 17:03:04,847 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:03:04" (1/1) ... [2021-12-14 17:03:04,848 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:03:04" (1/1) ... [2021-12-14 17:03:04,857 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:03:04" (1/1) ... [2021-12-14 17:03:04,858 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:03:04" (1/1) ... [2021-12-14 17:03:04,906 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:03:04" (1/1) ... [2021-12-14 17:03:04,917 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:03:04" (1/1) ... [2021-12-14 17:03:04,929 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:03:04" (1/1) ... [2021-12-14 17:03:04,939 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 17:03:04,945 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 17:03:04,945 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 17:03:04,945 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 17:03:04,946 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:03:04" (1/1) ... [2021-12-14 17:03:04,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 17:03:04,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:03:04,975 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-14 17:03:04,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-14 17:03:05,019 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-12-14 17:03:05,019 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-12-14 17:03:05,020 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2021-12-14 17:03:05,020 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2021-12-14 17:03:05,020 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-12-14 17:03:05,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 17:03:05,021 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-14 17:03:05,021 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-14 17:03:05,021 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 17:03:05,022 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-14 17:03:05,022 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-14 17:03:05,023 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-14 17:03:05,023 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 17:03:05,023 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_array [2021-12-14 17:03:05,023 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_array [2021-12-14 17:03:05,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-14 17:03:05,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 17:03:05,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 17:03:05,024 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-14 17:03:05,024 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-14 17:03:05,024 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-12-14 17:03:05,025 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-12-14 17:03:05,025 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-14 17:03:05,025 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-14 17:03:05,025 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 17:03:05,026 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-14 17:03:05,026 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_eq [2021-12-14 17:03:05,026 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_eq [2021-12-14 17:03:05,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-14 17:03:05,027 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-12-14 17:03:05,027 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-12-14 17:03:05,027 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-12-14 17:03:05,028 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-12-14 17:03:05,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 17:03:05,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 17:03:05,338 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 17:03:05,339 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 17:03:06,315 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 17:03:06,324 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 17:03:06,324 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-14 17:03:06,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:03:06 BoogieIcfgContainer [2021-12-14 17:03:06,326 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 17:03:06,329 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 17:03:06,330 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 17:03:06,332 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 17:03:06,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 05:03:02" (1/3) ... [2021-12-14 17:03:06,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6678c24f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:03:06, skipping insertion in model container [2021-12-14 17:03:06,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:03:04" (2/3) ... [2021-12-14 17:03:06,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6678c24f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:03:06, skipping insertion in model container [2021-12-14 17:03:06,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:03:06" (3/3) ... [2021-12-14 17:03:06,335 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_cursor_eq_byte_buf_harness.i [2021-12-14 17:03:06,339 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 17:03:06,340 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 17:03:06,391 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 17:03:06,400 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 17:03:06,400 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 17:03:06,423 INFO L276 IsEmpty]: Start isEmpty. Operand has 161 states, 106 states have (on average 1.2547169811320755) internal successors, (133), 107 states have internal predecessors, (133), 42 states have call successors, (42), 11 states have call predecessors, (42), 11 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2021-12-14 17:03:06,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-14 17:03:06,434 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:03:06,435 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:03:06,435 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:03:06,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:03:06,440 INFO L85 PathProgramCache]: Analyzing trace with hash -745875764, now seen corresponding path program 1 times [2021-12-14 17:03:06,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:03:06,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830978449] [2021-12-14 17:03:06,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:06,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:03:06,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:06,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:03:06,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:06,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:03:06,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:06,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:03:06,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:06,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-14 17:03:06,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:07,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-14 17:03:07,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:07,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-14 17:03:07,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:07,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 17:03:07,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:07,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:07,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:07,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 17:03:07,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:07,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-14 17:03:07,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:07,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 17:03:07,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:07,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-14 17:03:07,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:07,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-14 17:03:07,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:07,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-14 17:03:07,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:07,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-14 17:03:07,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:07,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-14 17:03:07,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:07,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-14 17:03:07,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:07,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:07,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:07,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 17:03:07,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:07,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-14 17:03:07,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:07,290 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-12-14 17:03:07,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:03:07,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830978449] [2021-12-14 17:03:07,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830978449] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:03:07,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:03:07,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 17:03:07,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842408661] [2021-12-14 17:03:07,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:03:07,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:03:07,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:03:07,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:03:07,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 17:03:07,328 INFO L87 Difference]: Start difference. First operand has 161 states, 106 states have (on average 1.2547169811320755) internal successors, (133), 107 states have internal predecessors, (133), 42 states have call successors, (42), 11 states have call predecessors, (42), 11 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (20), 1 states have call predecessors, (20), 2 states have call successors, (20) [2021-12-14 17:03:07,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:03:07,689 INFO L93 Difference]: Finished difference Result 320 states and 462 transitions. [2021-12-14 17:03:07,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:03:07,692 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (20), 1 states have call predecessors, (20), 2 states have call successors, (20) Word has length 127 [2021-12-14 17:03:07,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:03:07,700 INFO L225 Difference]: With dead ends: 320 [2021-12-14 17:03:07,700 INFO L226 Difference]: Without dead ends: 157 [2021-12-14 17:03:07,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:03:07,715 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 143 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 17:03:07,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 287 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 17:03:07,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-12-14 17:03:07,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 155. [2021-12-14 17:03:07,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 101 states have (on average 1.2277227722772277) internal successors, (124), 102 states have internal predecessors, (124), 42 states have call successors, (42), 11 states have call predecessors, (42), 11 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2021-12-14 17:03:07,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 207 transitions. [2021-12-14 17:03:07,777 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 207 transitions. Word has length 127 [2021-12-14 17:03:07,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:03:07,778 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 207 transitions. [2021-12-14 17:03:07,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (20), 1 states have call predecessors, (20), 2 states have call successors, (20) [2021-12-14 17:03:07,778 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 207 transitions. [2021-12-14 17:03:07,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-14 17:03:07,786 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:03:07,787 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:03:07,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 17:03:07,787 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:03:07,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:03:07,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1855366526, now seen corresponding path program 1 times [2021-12-14 17:03:07,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:03:07,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280263914] [2021-12-14 17:03:07,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:07,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:03:07,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:08,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:03:08,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:08,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:03:08,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:08,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:03:08,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:08,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-14 17:03:08,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:08,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-14 17:03:08,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:08,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-14 17:03:08,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:08,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 17:03:08,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:08,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:08,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:08,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 17:03:08,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:08,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-14 17:03:08,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:08,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 17:03:08,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:08,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-14 17:03:08,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:08,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-14 17:03:08,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:08,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-14 17:03:08,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:08,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-14 17:03:08,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:08,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-14 17:03:08,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:08,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-14 17:03:08,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:08,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:08,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:08,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 17:03:08,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:08,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-14 17:03:08,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:08,303 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-12-14 17:03:08,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:03:08,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280263914] [2021-12-14 17:03:08,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280263914] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:03:08,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868093822] [2021-12-14 17:03:08,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:08,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:03:08,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:03:08,310 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:03:08,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 17:03:08,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:08,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 2764 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 17:03:08,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:03:09,168 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-12-14 17:03:09,168 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:03:09,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868093822] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:03:09,169 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:03:09,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2021-12-14 17:03:09,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971982906] [2021-12-14 17:03:09,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:03:09,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 17:03:09,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:03:09,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 17:03:09,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-14 17:03:09,172 INFO L87 Difference]: Start difference. First operand 155 states and 207 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-12-14 17:03:09,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:03:09,359 INFO L93 Difference]: Finished difference Result 301 states and 403 transitions. [2021-12-14 17:03:09,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 17:03:09,359 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 127 [2021-12-14 17:03:09,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:03:09,361 INFO L225 Difference]: With dead ends: 301 [2021-12-14 17:03:09,361 INFO L226 Difference]: Without dead ends: 158 [2021-12-14 17:03:09,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-12-14 17:03:09,363 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 229 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:03:09,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 428 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 17:03:09,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-12-14 17:03:09,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2021-12-14 17:03:09,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 103 states have (on average 1.2233009708737863) internal successors, (126), 105 states have internal predecessors, (126), 42 states have call successors, (42), 11 states have call predecessors, (42), 12 states have return successors, (43), 41 states have call predecessors, (43), 41 states have call successors, (43) [2021-12-14 17:03:09,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 211 transitions. [2021-12-14 17:03:09,377 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 211 transitions. Word has length 127 [2021-12-14 17:03:09,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:03:09,377 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 211 transitions. [2021-12-14 17:03:09,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-12-14 17:03:09,378 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 211 transitions. [2021-12-14 17:03:09,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-14 17:03:09,379 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:03:09,379 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:03:09,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 17:03:09,592 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 [2021-12-14 17:03:09,592 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:03:09,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:03:09,593 INFO L85 PathProgramCache]: Analyzing trace with hash -2026465251, now seen corresponding path program 1 times [2021-12-14 17:03:09,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:03:09,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351141530] [2021-12-14 17:03:09,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:09,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:03:09,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:09,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:03:09,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:09,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:03:09,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:09,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:03:09,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:09,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:03:09,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:09,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-14 17:03:09,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:09,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-14 17:03:09,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:09,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 17:03:09,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:09,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:09,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:09,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-14 17:03:09,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:09,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-14 17:03:09,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:09,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 17:03:09,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:09,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-14 17:03:09,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:09,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-14 17:03:09,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:09,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 17:03:09,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:09,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-14 17:03:09,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:10,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-14 17:03:10,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:10,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-14 17:03:10,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:10,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:10,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:10,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 17:03:10,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:10,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-14 17:03:10,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:10,044 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2021-12-14 17:03:10,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:03:10,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351141530] [2021-12-14 17:03:10,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351141530] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:03:10,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334083585] [2021-12-14 17:03:10,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:10,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:03:10,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:03:10,052 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:03:10,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 17:03:10,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:10,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 2769 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 17:03:10,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:03:10,809 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-14 17:03:10,809 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:03:10,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334083585] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:03:10,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:03:10,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2021-12-14 17:03:10,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578173856] [2021-12-14 17:03:10,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:03:10,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 17:03:10,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:03:10,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 17:03:10,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-14 17:03:10,812 INFO L87 Difference]: Start difference. First operand 158 states and 211 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-12-14 17:03:11,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:03:11,011 INFO L93 Difference]: Finished difference Result 282 states and 381 transitions. [2021-12-14 17:03:11,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 17:03:11,012 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 129 [2021-12-14 17:03:11,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:03:11,013 INFO L225 Difference]: With dead ends: 282 [2021-12-14 17:03:11,014 INFO L226 Difference]: Without dead ends: 161 [2021-12-14 17:03:11,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-12-14 17:03:11,015 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 228 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 17:03:11,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 430 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 17:03:11,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-12-14 17:03:11,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2021-12-14 17:03:11,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 105 states have (on average 1.2190476190476192) internal successors, (128), 108 states have internal predecessors, (128), 42 states have call successors, (42), 11 states have call predecessors, (42), 13 states have return successors, (45), 41 states have call predecessors, (45), 41 states have call successors, (45) [2021-12-14 17:03:11,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 215 transitions. [2021-12-14 17:03:11,035 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 215 transitions. Word has length 129 [2021-12-14 17:03:11,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:03:11,035 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 215 transitions. [2021-12-14 17:03:11,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-12-14 17:03:11,036 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 215 transitions. [2021-12-14 17:03:11,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-14 17:03:11,037 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:03:11,037 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:03:11,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 17:03:11,259 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 [2021-12-14 17:03:11,260 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:03:11,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:03:11,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1696655400, now seen corresponding path program 1 times [2021-12-14 17:03:11,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:03:11,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732844937] [2021-12-14 17:03:11,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:11,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:03:11,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:11,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:03:11,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:11,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:03:11,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:11,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:03:11,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:11,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:03:11,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:11,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-14 17:03:11,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:11,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-14 17:03:11,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:11,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 17:03:11,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:11,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:11,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:11,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-14 17:03:11,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:11,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 17:03:11,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:11,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-14 17:03:11,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:11,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-14 17:03:11,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:11,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 17:03:11,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:11,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-14 17:03:11,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:11,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-14 17:03:11,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:11,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-14 17:03:11,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:11,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-14 17:03:11,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:11,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:11,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:11,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 17:03:11,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:11,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-14 17:03:11,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:11,606 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-12-14 17:03:11,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:03:11,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732844937] [2021-12-14 17:03:11,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732844937] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:03:11,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511405739] [2021-12-14 17:03:11,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:11,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:03:11,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:03:11,608 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:03:11,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 17:03:12,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:12,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 2786 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 17:03:12,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:03:12,414 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-14 17:03:12,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:03:12,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511405739] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:03:12,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:03:12,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2021-12-14 17:03:12,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362051251] [2021-12-14 17:03:12,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:03:12,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 17:03:12,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:03:12,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 17:03:12,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-12-14 17:03:12,416 INFO L87 Difference]: Start difference. First operand 161 states and 215 transitions. Second operand has 7 states, 6 states have (on average 11.333333333333334) internal successors, (68), 7 states have internal predecessors, (68), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 3 states have call predecessors, (20), 4 states have call successors, (20) [2021-12-14 17:03:12,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:03:12,644 INFO L93 Difference]: Finished difference Result 271 states and 363 transitions. [2021-12-14 17:03:12,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 17:03:12,645 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.333333333333334) internal successors, (68), 7 states have internal predecessors, (68), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 3 states have call predecessors, (20), 4 states have call successors, (20) Word has length 135 [2021-12-14 17:03:12,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:03:12,646 INFO L225 Difference]: With dead ends: 271 [2021-12-14 17:03:12,647 INFO L226 Difference]: Without dead ends: 158 [2021-12-14 17:03:12,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-12-14 17:03:12,648 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 249 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 17:03:12,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 560 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 17:03:12,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-12-14 17:03:12,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2021-12-14 17:03:12,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 103 states have (on average 1.2135922330097086) internal successors, (125), 105 states have internal predecessors, (125), 42 states have call successors, (42), 11 states have call predecessors, (42), 12 states have return successors, (43), 41 states have call predecessors, (43), 41 states have call successors, (43) [2021-12-14 17:03:12,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 210 transitions. [2021-12-14 17:03:12,658 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 210 transitions. Word has length 135 [2021-12-14 17:03:12,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:03:12,658 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 210 transitions. [2021-12-14 17:03:12,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.333333333333334) internal successors, (68), 7 states have internal predecessors, (68), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 3 states have call predecessors, (20), 4 states have call successors, (20) [2021-12-14 17:03:12,658 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 210 transitions. [2021-12-14 17:03:12,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-14 17:03:12,660 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:03:12,660 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:03:12,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 17:03:12,874 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 [2021-12-14 17:03:12,875 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:03:12,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:03:12,875 INFO L85 PathProgramCache]: Analyzing trace with hash -195762830, now seen corresponding path program 1 times [2021-12-14 17:03:12,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:03:12,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780023031] [2021-12-14 17:03:12,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:12,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:03:12,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:13,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:03:13,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:13,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:03:13,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:13,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:03:13,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:13,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:03:13,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:13,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-14 17:03:13,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:13,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-14 17:03:13,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:13,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 17:03:13,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:13,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:13,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:13,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-14 17:03:13,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:13,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 17:03:13,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:13,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-14 17:03:13,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:13,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-14 17:03:13,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:13,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 17:03:13,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:13,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-14 17:03:13,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:13,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-14 17:03:13,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:13,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-14 17:03:13,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:13,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-14 17:03:13,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:13,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:13,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:13,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 17:03:13,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:13,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-14 17:03:13,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:13,232 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2021-12-14 17:03:13,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:03:13,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780023031] [2021-12-14 17:03:13,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780023031] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:03:13,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:03:13,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 17:03:13,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312465133] [2021-12-14 17:03:13,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:03:13,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 17:03:13,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:03:13,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 17:03:13,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-14 17:03:13,236 INFO L87 Difference]: Start difference. First operand 158 states and 210 transitions. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 6 states have internal predecessors, (57), 4 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2021-12-14 17:03:13,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:03:13,752 INFO L93 Difference]: Finished difference Result 264 states and 351 transitions. [2021-12-14 17:03:13,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 17:03:13,753 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 6 states have internal predecessors, (57), 4 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) Word has length 139 [2021-12-14 17:03:13,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:03:13,754 INFO L225 Difference]: With dead ends: 264 [2021-12-14 17:03:13,754 INFO L226 Difference]: Without dead ends: 157 [2021-12-14 17:03:13,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-12-14 17:03:13,755 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 228 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 17:03:13,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 596 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 17:03:13,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-12-14 17:03:13,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 155. [2021-12-14 17:03:13,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 101 states have (on average 1.2079207920792079) internal successors, (122), 102 states have internal predecessors, (122), 42 states have call successors, (42), 11 states have call predecessors, (42), 11 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2021-12-14 17:03:13,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 205 transitions. [2021-12-14 17:03:13,763 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 205 transitions. Word has length 139 [2021-12-14 17:03:13,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:03:13,764 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 205 transitions. [2021-12-14 17:03:13,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 6 states have internal predecessors, (57), 4 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2021-12-14 17:03:13,764 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 205 transitions. [2021-12-14 17:03:13,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-14 17:03:13,765 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:03:13,766 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:03:13,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 17:03:13,766 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:03:13,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:03:13,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1542450691, now seen corresponding path program 1 times [2021-12-14 17:03:13,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:03:13,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178429952] [2021-12-14 17:03:13,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:13,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:03:13,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:13,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:03:13,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:13,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:03:13,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:13,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:03:13,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:13,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:03:13,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:14,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-14 17:03:14,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:14,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-14 17:03:14,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:14,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 17:03:14,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:14,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:14,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:14,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-14 17:03:14,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:14,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 17:03:14,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:14,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-14 17:03:14,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:14,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-14 17:03:14,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:14,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 17:03:14,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:14,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-14 17:03:14,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:14,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-14 17:03:14,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:14,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-14 17:03:14,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:14,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-14 17:03:14,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:14,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:14,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:14,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 17:03:14,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:14,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-14 17:03:14,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:14,214 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-12-14 17:03:14,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:03:14,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178429952] [2021-12-14 17:03:14,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178429952] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:03:14,215 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:03:14,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 17:03:14,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303867316] [2021-12-14 17:03:14,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:03:14,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 17:03:14,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:03:14,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 17:03:14,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-14 17:03:14,217 INFO L87 Difference]: Start difference. First operand 155 states and 205 transitions. Second operand has 10 states, 9 states have (on average 6.333333333333333) internal successors, (57), 6 states have internal predecessors, (57), 2 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 1 states have call successors, (20) [2021-12-14 17:03:14,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:03:14,815 INFO L93 Difference]: Finished difference Result 169 states and 223 transitions. [2021-12-14 17:03:14,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 17:03:14,818 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.333333333333333) internal successors, (57), 6 states have internal predecessors, (57), 2 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 1 states have call successors, (20) Word has length 145 [2021-12-14 17:03:14,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:03:14,820 INFO L225 Difference]: With dead ends: 169 [2021-12-14 17:03:14,820 INFO L226 Difference]: Without dead ends: 167 [2021-12-14 17:03:14,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-12-14 17:03:14,821 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 163 mSDsluCounter, 838 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1020 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 17:03:14,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 1020 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 17:03:14,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-12-14 17:03:14,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 164. [2021-12-14 17:03:14,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 107 states have (on average 1.1962616822429906) internal successors, (128), 109 states have internal predecessors, (128), 43 states have call successors, (43), 12 states have call predecessors, (43), 13 states have return successors, (46), 42 states have call predecessors, (46), 42 states have call successors, (46) [2021-12-14 17:03:14,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 217 transitions. [2021-12-14 17:03:14,832 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 217 transitions. Word has length 145 [2021-12-14 17:03:14,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:03:14,832 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 217 transitions. [2021-12-14 17:03:14,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.333333333333333) internal successors, (57), 6 states have internal predecessors, (57), 2 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 1 states have call successors, (20) [2021-12-14 17:03:14,833 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 217 transitions. [2021-12-14 17:03:14,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-12-14 17:03:14,834 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:03:14,834 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:03:14,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 17:03:14,835 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:03:14,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:03:14,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1440515461, now seen corresponding path program 1 times [2021-12-14 17:03:14,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:03:14,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453475184] [2021-12-14 17:03:14,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:14,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:03:14,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:15,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:03:15,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:15,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:03:15,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:15,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:03:15,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:15,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:03:15,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:15,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-14 17:03:15,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:15,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-14 17:03:15,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:15,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 17:03:15,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:15,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:15,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:15,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-14 17:03:15,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:15,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 17:03:15,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:15,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-14 17:03:15,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:15,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-14 17:03:15,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:15,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 17:03:15,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:15,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-14 17:03:15,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:15,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-14 17:03:15,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:15,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-14 17:03:15,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:15,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-14 17:03:15,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:15,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:15,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:15,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 17:03:15,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:15,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-14 17:03:15,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:15,650 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-12-14 17:03:15,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:03:15,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453475184] [2021-12-14 17:03:15,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453475184] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:03:15,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444985587] [2021-12-14 17:03:15,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:15,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:03:15,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:03:15,655 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:03:15,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 17:03:16,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:16,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 2825 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-14 17:03:16,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:03:16,340 INFO L388 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 [2021-12-14 17:03:16,768 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-14 17:03:16,768 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:03:16,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444985587] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:03:16,768 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:03:16,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [20] total 30 [2021-12-14 17:03:16,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115211884] [2021-12-14 17:03:16,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:03:16,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-14 17:03:16,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:03:16,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-14 17:03:16,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=788, Unknown=0, NotChecked=0, Total=870 [2021-12-14 17:03:16,771 INFO L87 Difference]: Start difference. First operand 164 states and 217 transitions. Second operand has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 10 states have internal predecessors, (77), 5 states have call successors, (21), 3 states have call predecessors, (21), 4 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2021-12-14 17:03:16,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:03:16,859 INFO L93 Difference]: Finished difference Result 308 states and 407 transitions. [2021-12-14 17:03:16,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 17:03:16,860 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 10 states have internal predecessors, (77), 5 states have call successors, (21), 3 states have call predecessors, (21), 4 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) Word has length 149 [2021-12-14 17:03:16,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:03:16,862 INFO L225 Difference]: With dead ends: 308 [2021-12-14 17:03:16,863 INFO L226 Difference]: Without dead ends: 177 [2021-12-14 17:03:16,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=842, Unknown=0, NotChecked=0, Total=930 [2021-12-14 17:03:16,864 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 22 mSDsluCounter, 1256 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 1455 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:03:16,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 1455 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 69 Unchecked, 0.1s Time] [2021-12-14 17:03:16,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-12-14 17:03:16,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2021-12-14 17:03:16,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 119 states have (on average 1.2016806722689075) internal successors, (143), 121 states have internal predecessors, (143), 43 states have call successors, (43), 13 states have call predecessors, (43), 14 states have return successors, (47), 42 states have call predecessors, (47), 42 states have call successors, (47) [2021-12-14 17:03:16,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 233 transitions. [2021-12-14 17:03:16,881 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 233 transitions. Word has length 149 [2021-12-14 17:03:16,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:03:16,882 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 233 transitions. [2021-12-14 17:03:16,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 10 states have internal predecessors, (77), 5 states have call successors, (21), 3 states have call predecessors, (21), 4 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2021-12-14 17:03:16,882 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 233 transitions. [2021-12-14 17:03:16,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-12-14 17:03:16,883 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:03:16,884 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:03:16,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 17:03:17,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:03:17,099 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:03:17,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:03:17,100 INFO L85 PathProgramCache]: Analyzing trace with hash 669781895, now seen corresponding path program 1 times [2021-12-14 17:03:17,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:03:17,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290237889] [2021-12-14 17:03:17,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:17,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:03:17,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:17,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:03:17,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:17,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:03:17,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:17,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:03:17,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:17,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:03:17,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:17,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-14 17:03:17,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:17,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-14 17:03:17,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:17,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 17:03:17,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:17,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:17,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:17,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-14 17:03:17,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:17,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 17:03:17,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:17,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-14 17:03:17,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:17,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-14 17:03:17,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:17,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 17:03:17,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:17,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-14 17:03:17,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:17,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-14 17:03:17,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:17,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-14 17:03:17,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:17,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-14 17:03:17,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:17,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:17,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:17,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 17:03:17,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:17,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-14 17:03:17,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:17,396 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-12-14 17:03:17,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:03:17,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290237889] [2021-12-14 17:03:17,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290237889] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:03:17,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827337015] [2021-12-14 17:03:17,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:17,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:03:17,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:03:17,398 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:03:17,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 17:03:17,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:17,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 2820 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 17:03:17,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:03:18,120 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-14 17:03:18,121 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:03:18,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827337015] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:03:18,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:03:18,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2021-12-14 17:03:18,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908664286] [2021-12-14 17:03:18,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:03:18,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:03:18,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:03:18,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:03:18,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 17:03:18,124 INFO L87 Difference]: Start difference. First operand 177 states and 233 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-12-14 17:03:18,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:03:18,150 INFO L93 Difference]: Finished difference Result 314 states and 419 transitions. [2021-12-14 17:03:18,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:03:18,151 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 149 [2021-12-14 17:03:18,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:03:18,153 INFO L225 Difference]: With dead ends: 314 [2021-12-14 17:03:18,154 INFO L226 Difference]: Without dead ends: 183 [2021-12-14 17:03:18,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-14 17:03:18,155 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 20 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:03:18,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 607 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:03:18,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-12-14 17:03:18,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 171. [2021-12-14 17:03:18,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 114 states have (on average 1.2017543859649122) internal successors, (137), 115 states have internal predecessors, (137), 43 states have call successors, (43), 13 states have call predecessors, (43), 13 states have return successors, (46), 42 states have call predecessors, (46), 42 states have call successors, (46) [2021-12-14 17:03:18,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 226 transitions. [2021-12-14 17:03:18,167 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 226 transitions. Word has length 149 [2021-12-14 17:03:18,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:03:18,168 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 226 transitions. [2021-12-14 17:03:18,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-12-14 17:03:18,168 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 226 transitions. [2021-12-14 17:03:18,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-12-14 17:03:18,169 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:03:18,170 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:03:18,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 17:03:18,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:03:18,391 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:03:18,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:03:18,392 INFO L85 PathProgramCache]: Analyzing trace with hash -383679283, now seen corresponding path program 1 times [2021-12-14 17:03:18,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:03:18,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307863925] [2021-12-14 17:03:18,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:18,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:03:18,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:18,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:03:18,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:18,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:03:18,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:18,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:03:18,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:18,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:03:18,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:18,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-14 17:03:18,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:18,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-14 17:03:18,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:18,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 17:03:18,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:18,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:18,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:18,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-14 17:03:18,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:18,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-14 17:03:18,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:18,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-14 17:03:18,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:18,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-14 17:03:18,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:18,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-14 17:03:18,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:18,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-14 17:03:18,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:18,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-14 17:03:18,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:18,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-14 17:03:18,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:18,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-14 17:03:18,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:18,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:18,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:18,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 17:03:18,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:18,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-12-14 17:03:18,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:18,814 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-12-14 17:03:18,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:03:18,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307863925] [2021-12-14 17:03:18,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307863925] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:03:18,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555826771] [2021-12-14 17:03:18,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:18,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:03:18,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:03:18,816 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:03:18,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 17:03:19,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:19,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 2837 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-14 17:03:19,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:03:19,505 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-14 17:03:19,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:03:19,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555826771] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:03:19,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:03:19,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 12 [2021-12-14 17:03:19,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250158225] [2021-12-14 17:03:19,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:03:19,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 17:03:19,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:03:19,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 17:03:19,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-12-14 17:03:19,508 INFO L87 Difference]: Start difference. First operand 171 states and 226 transitions. Second operand has 9 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-12-14 17:03:19,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:03:19,642 INFO L93 Difference]: Finished difference Result 305 states and 405 transitions. [2021-12-14 17:03:19,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 17:03:19,642 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 153 [2021-12-14 17:03:19,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:03:19,643 INFO L225 Difference]: With dead ends: 305 [2021-12-14 17:03:19,643 INFO L226 Difference]: Without dead ends: 176 [2021-12-14 17:03:19,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 189 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-12-14 17:03:19,644 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 12 mSDsluCounter, 1307 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1500 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:03:19,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1500 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 17:03:19,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-12-14 17:03:19,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2021-12-14 17:03:19,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 118 states have (on average 1.194915254237288) internal successors, (141), 120 states have internal predecessors, (141), 43 states have call successors, (43), 13 states have call predecessors, (43), 14 states have return successors, (49), 42 states have call predecessors, (49), 42 states have call successors, (49) [2021-12-14 17:03:19,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 233 transitions. [2021-12-14 17:03:19,653 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 233 transitions. Word has length 153 [2021-12-14 17:03:19,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:03:19,654 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 233 transitions. [2021-12-14 17:03:19,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-12-14 17:03:19,654 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 233 transitions. [2021-12-14 17:03:19,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-12-14 17:03:19,655 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:03:19,656 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:03:19,682 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-14 17:03:19,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:03:19,864 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:03:19,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:03:19,864 INFO L85 PathProgramCache]: Analyzing trace with hash 3909140, now seen corresponding path program 1 times [2021-12-14 17:03:19,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:03:19,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171220439] [2021-12-14 17:03:19,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:19,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:03:20,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:20,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:03:20,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:20,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:03:20,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:20,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:03:20,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:20,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:03:20,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:20,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-14 17:03:20,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:20,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-14 17:03:20,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:20,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 17:03:20,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:20,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:20,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:20,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-14 17:03:20,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:20,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-14 17:03:20,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:20,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-14 17:03:20,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:20,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 17:03:20,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:20,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-14 17:03:20,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:20,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-14 17:03:20,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:20,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-14 17:03:20,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:20,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-14 17:03:20,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:20,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-14 17:03:20,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:20,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:20,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:20,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 17:03:20,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:20,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-14 17:03:20,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:20,657 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-12-14 17:03:20,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:03:20,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171220439] [2021-12-14 17:03:20,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171220439] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:03:20,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227453531] [2021-12-14 17:03:20,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:20,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:03:20,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:03:20,660 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:03:20,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 17:03:21,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:21,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 2847 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-14 17:03:21,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:03:21,426 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-14 17:03:21,426 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:03:21,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227453531] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:03:21,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:03:21,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [20] total 24 [2021-12-14 17:03:21,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422953152] [2021-12-14 17:03:21,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:03:21,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 17:03:21,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:03:21,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 17:03:21,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-12-14 17:03:21,429 INFO L87 Difference]: Start difference. First operand 176 states and 233 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-12-14 17:03:21,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:03:21,660 INFO L93 Difference]: Finished difference Result 348 states and 467 transitions. [2021-12-14 17:03:21,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 17:03:21,661 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 155 [2021-12-14 17:03:21,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:03:21,666 INFO L225 Difference]: With dead ends: 348 [2021-12-14 17:03:21,666 INFO L226 Difference]: Without dead ends: 214 [2021-12-14 17:03:21,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2021-12-14 17:03:21,667 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 53 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:03:21,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 874 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 136 Invalid, 0 Unknown, 44 Unchecked, 0.1s Time] [2021-12-14 17:03:21,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-12-14 17:03:21,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 188. [2021-12-14 17:03:21,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 130 states have (on average 1.2153846153846153) internal successors, (158), 132 states have internal predecessors, (158), 43 states have call successors, (43), 13 states have call predecessors, (43), 14 states have return successors, (49), 42 states have call predecessors, (49), 42 states have call successors, (49) [2021-12-14 17:03:21,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 250 transitions. [2021-12-14 17:03:21,696 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 250 transitions. Word has length 155 [2021-12-14 17:03:21,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:03:21,697 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 250 transitions. [2021-12-14 17:03:21,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-12-14 17:03:21,698 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 250 transitions. [2021-12-14 17:03:21,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-12-14 17:03:21,700 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:03:21,700 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:03:21,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-14 17:03:21,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:03:21,911 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:03:21,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:03:21,912 INFO L85 PathProgramCache]: Analyzing trace with hash 774642706, now seen corresponding path program 1 times [2021-12-14 17:03:21,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:03:21,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196344668] [2021-12-14 17:03:21,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:21,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:03:22,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:22,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:03:22,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:22,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:03:22,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:22,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:03:22,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:22,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:03:22,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:22,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-14 17:03:22,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:22,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-14 17:03:22,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:22,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 17:03:22,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:22,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:22,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:22,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-14 17:03:22,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:22,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-14 17:03:22,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:22,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-14 17:03:22,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:22,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 17:03:22,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:22,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-14 17:03:22,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:22,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-14 17:03:22,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:22,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-14 17:03:22,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:22,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-14 17:03:22,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:22,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-14 17:03:22,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:22,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:22,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:22,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 17:03:22,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:22,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-14 17:03:22,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:22,683 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-12-14 17:03:22,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:03:22,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196344668] [2021-12-14 17:03:22,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196344668] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:03:22,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769054157] [2021-12-14 17:03:22,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:22,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:03:22,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:03:22,685 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:03:22,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-14 17:03:23,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:23,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 2842 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 17:03:23,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:03:23,487 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-14 17:03:23,488 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:03:23,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769054157] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:03:23,488 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:03:23,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [20] total 23 [2021-12-14 17:03:23,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44678092] [2021-12-14 17:03:23,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:03:23,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 17:03:23,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:03:23,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 17:03:23,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-12-14 17:03:23,490 INFO L87 Difference]: Start difference. First operand 188 states and 250 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-12-14 17:03:23,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:03:23,640 INFO L93 Difference]: Finished difference Result 349 states and 474 transitions. [2021-12-14 17:03:23,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:03:23,640 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 155 [2021-12-14 17:03:23,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:03:23,642 INFO L225 Difference]: With dead ends: 349 [2021-12-14 17:03:23,642 INFO L226 Difference]: Without dead ends: 207 [2021-12-14 17:03:23,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-12-14 17:03:23,643 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 42 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:03:23,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 708 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2021-12-14 17:03:23,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-12-14 17:03:23,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 191. [2021-12-14 17:03:23,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 133 states have (on average 1.2030075187969924) internal successors, (160), 135 states have internal predecessors, (160), 43 states have call successors, (43), 13 states have call predecessors, (43), 14 states have return successors, (49), 42 states have call predecessors, (49), 42 states have call successors, (49) [2021-12-14 17:03:23,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 252 transitions. [2021-12-14 17:03:23,654 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 252 transitions. Word has length 155 [2021-12-14 17:03:23,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:03:23,654 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 252 transitions. [2021-12-14 17:03:23,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-12-14 17:03:23,655 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 252 transitions. [2021-12-14 17:03:23,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-12-14 17:03:23,656 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:03:23,656 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:03:23,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-14 17:03:23,870 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,SelfDestructingSolverStorable10 [2021-12-14 17:03:23,870 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:03:23,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:03:23,871 INFO L85 PathProgramCache]: Analyzing trace with hash 746142416, now seen corresponding path program 1 times [2021-12-14 17:03:23,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:03:23,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867005906] [2021-12-14 17:03:23,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:23,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:03:23,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:23,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:03:23,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:23,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:03:23,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:23,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:03:23,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:24,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:03:24,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:24,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-14 17:03:24,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:24,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-14 17:03:24,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:24,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 17:03:24,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:24,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:24,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:24,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-14 17:03:24,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:24,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-14 17:03:24,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:24,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-14 17:03:24,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:24,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 17:03:24,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:24,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-14 17:03:24,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:24,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-14 17:03:24,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:24,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-14 17:03:24,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:24,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-14 17:03:24,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:24,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-14 17:03:24,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:24,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:24,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:24,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 17:03:24,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:24,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-14 17:03:24,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:24,140 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2021-12-14 17:03:24,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:03:24,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867005906] [2021-12-14 17:03:24,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867005906] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:03:24,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547472054] [2021-12-14 17:03:24,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:24,141 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:03:24,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:03:24,142 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:03:24,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-14 17:03:24,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:24,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 2837 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 17:03:24,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:03:24,862 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-14 17:03:24,863 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:03:24,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547472054] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:03:24,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:03:24,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2021-12-14 17:03:24,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755091420] [2021-12-14 17:03:24,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:03:24,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:03:24,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:03:24,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:03:24,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 17:03:24,865 INFO L87 Difference]: Start difference. First operand 191 states and 252 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-12-14 17:03:24,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:03:24,893 INFO L93 Difference]: Finished difference Result 340 states and 453 transitions. [2021-12-14 17:03:24,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:03:24,894 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 155 [2021-12-14 17:03:24,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:03:24,895 INFO L225 Difference]: With dead ends: 340 [2021-12-14 17:03:24,896 INFO L226 Difference]: Without dead ends: 191 [2021-12-14 17:03:24,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-14 17:03:24,897 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 9 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 600 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 [2021-12-14 17:03:24,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 600 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:03:24,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-12-14 17:03:24,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 185. [2021-12-14 17:03:24,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 127 states have (on average 1.188976377952756) internal successors, (151), 129 states have internal predecessors, (151), 43 states have call successors, (43), 13 states have call predecessors, (43), 14 states have return successors, (49), 42 states have call predecessors, (49), 42 states have call successors, (49) [2021-12-14 17:03:24,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 243 transitions. [2021-12-14 17:03:24,906 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 243 transitions. Word has length 155 [2021-12-14 17:03:24,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:03:24,907 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 243 transitions. [2021-12-14 17:03:24,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-12-14 17:03:24,907 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 243 transitions. [2021-12-14 17:03:24,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-12-14 17:03:24,909 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:03:24,909 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:03:24,934 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-14 17:03:25,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:03:25,123 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:03:25,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:03:25,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1604980246, now seen corresponding path program 1 times [2021-12-14 17:03:25,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:03:25,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606990979] [2021-12-14 17:03:25,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:25,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:03:25,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:25,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:03:25,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:25,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:03:25,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:25,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:03:25,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:25,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:03:25,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:25,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-14 17:03:25,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:25,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-14 17:03:25,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:25,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 17:03:25,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:25,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:25,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:25,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-14 17:03:25,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:25,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-14 17:03:25,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:25,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-14 17:03:25,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:25,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 17:03:25,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:25,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-14 17:03:25,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:25,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-14 17:03:25,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:25,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-14 17:03:25,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:25,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-14 17:03:25,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:25,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-14 17:03:25,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:25,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:25,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:25,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 17:03:25,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:25,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-14 17:03:25,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:25,374 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-12-14 17:03:25,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:03:25,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606990979] [2021-12-14 17:03:25,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606990979] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:03:25,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496293528] [2021-12-14 17:03:25,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:25,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:03:25,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:03:25,377 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:03:25,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-14 17:03:25,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:25,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 2844 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 17:03:25,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:03:26,009 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-14 17:03:26,009 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:03:26,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496293528] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:03:26,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:03:26,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2021-12-14 17:03:26,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481894441] [2021-12-14 17:03:26,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:03:26,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:03:26,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:03:26,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:03:26,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 17:03:26,011 INFO L87 Difference]: Start difference. First operand 185 states and 243 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-12-14 17:03:26,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:03:26,041 INFO L93 Difference]: Finished difference Result 339 states and 449 transitions. [2021-12-14 17:03:26,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:03:26,041 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 155 [2021-12-14 17:03:26,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:03:26,043 INFO L225 Difference]: With dead ends: 339 [2021-12-14 17:03:26,043 INFO L226 Difference]: Without dead ends: 196 [2021-12-14 17:03:26,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-14 17:03:26,044 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 34 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:03:26,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 598 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:03:26,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-12-14 17:03:26,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 181. [2021-12-14 17:03:26,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 123 states have (on average 1.170731707317073) internal successors, (144), 125 states have internal predecessors, (144), 43 states have call successors, (43), 13 states have call predecessors, (43), 14 states have return successors, (49), 42 states have call predecessors, (49), 42 states have call successors, (49) [2021-12-14 17:03:26,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 236 transitions. [2021-12-14 17:03:26,054 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 236 transitions. Word has length 155 [2021-12-14 17:03:26,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:03:26,054 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 236 transitions. [2021-12-14 17:03:26,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-12-14 17:03:26,055 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 236 transitions. [2021-12-14 17:03:26,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-12-14 17:03:26,056 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:03:26,056 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:03:26,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-14 17:03:26,267 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,SelfDestructingSolverStorable12 [2021-12-14 17:03:26,267 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:03:26,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:03:26,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1338601832, now seen corresponding path program 1 times [2021-12-14 17:03:26,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:03:26,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873680477] [2021-12-14 17:03:26,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:26,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:03:26,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:26,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:03:26,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:26,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:03:26,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:26,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:03:26,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:26,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:03:26,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:26,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-14 17:03:26,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:26,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-14 17:03:26,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:26,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 17:03:26,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:26,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:26,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:26,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-14 17:03:26,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:26,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-14 17:03:26,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:26,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-14 17:03:26,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:26,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 17:03:26,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:26,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-14 17:03:26,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:26,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-14 17:03:26,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:26,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-14 17:03:26,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:26,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-14 17:03:26,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:26,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-14 17:03:26,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:26,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:26,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:26,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 17:03:26,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:26,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-14 17:03:26,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:26,983 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-12-14 17:03:26,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:03:26,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873680477] [2021-12-14 17:03:26,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873680477] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:03:26,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75231925] [2021-12-14 17:03:26,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:26,984 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:03:26,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:03:26,985 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:03:26,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-14 17:03:27,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:27,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 2839 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-14 17:03:27,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:03:27,770 INFO L388 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 [2021-12-14 17:03:28,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-14 17:03:28,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-12-14 17:03:28,789 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 121 proven. 4 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-14 17:03:28,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:03:29,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-12-14 17:03:29,794 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-12-14 17:03:29,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-12-14 17:03:29,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2021-12-14 17:03:30,141 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-12-14 17:03:30,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75231925] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 17:03:30,142 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 17:03:30,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 16] total 49 [2021-12-14 17:03:30,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123757760] [2021-12-14 17:03:30,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 17:03:30,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-14 17:03:30,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:03:30,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-14 17:03:30,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=2176, Unknown=0, NotChecked=0, Total=2352 [2021-12-14 17:03:30,144 INFO L87 Difference]: Start difference. First operand 181 states and 236 transitions. Second operand has 49 states, 46 states have (on average 4.586956521739131) internal successors, (211), 44 states have internal predecessors, (211), 20 states have call successors, (58), 9 states have call predecessors, (58), 15 states have return successors, (57), 17 states have call predecessors, (57), 20 states have call successors, (57) [2021-12-14 17:03:36,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:03:36,723 INFO L93 Difference]: Finished difference Result 752 states and 1108 transitions. [2021-12-14 17:03:36,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-14 17:03:36,723 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 46 states have (on average 4.586956521739131) internal successors, (211), 44 states have internal predecessors, (211), 20 states have call successors, (58), 9 states have call predecessors, (58), 15 states have return successors, (57), 17 states have call predecessors, (57), 20 states have call successors, (57) Word has length 155 [2021-12-14 17:03:36,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:03:36,730 INFO L225 Difference]: With dead ends: 752 [2021-12-14 17:03:36,730 INFO L226 Difference]: Without dead ends: 621 [2021-12-14 17:03:36,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 341 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3115 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=867, Invalid=10053, Unknown=0, NotChecked=0, Total=10920 [2021-12-14 17:03:36,734 INFO L933 BasicCegarLoop]: 264 mSDtfsCounter, 867 mSDsluCounter, 2391 mSDsCounter, 0 mSdLazyCounter, 6143 mSolverCounterSat, 913 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 935 SdHoareTripleChecker+Valid, 2655 SdHoareTripleChecker+Invalid, 8119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 913 IncrementalHoareTripleChecker+Valid, 6143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1063 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-12-14 17:03:36,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [935 Valid, 2655 Invalid, 8119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [913 Valid, 6143 Invalid, 0 Unknown, 1063 Unchecked, 4.6s Time] [2021-12-14 17:03:36,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-12-14 17:03:36,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 339. [2021-12-14 17:03:36,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 223 states have (on average 1.147982062780269) internal successors, (256), 227 states have internal predecessors, (256), 90 states have call successors, (90), 23 states have call predecessors, (90), 25 states have return successors, (116), 88 states have call predecessors, (116), 89 states have call successors, (116) [2021-12-14 17:03:36,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 462 transitions. [2021-12-14 17:03:36,769 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 462 transitions. Word has length 155 [2021-12-14 17:03:36,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:03:36,770 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 462 transitions. [2021-12-14 17:03:36,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 46 states have (on average 4.586956521739131) internal successors, (211), 44 states have internal predecessors, (211), 20 states have call successors, (58), 9 states have call predecessors, (58), 15 states have return successors, (57), 17 states have call predecessors, (57), 20 states have call successors, (57) [2021-12-14 17:03:36,770 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 462 transitions. [2021-12-14 17:03:36,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-14 17:03:36,772 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:03:36,772 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:03:36,802 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-14 17:03:36,987 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,SelfDestructingSolverStorable13 [2021-12-14 17:03:36,987 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:03:36,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:03:36,988 INFO L85 PathProgramCache]: Analyzing trace with hash -58694250, now seen corresponding path program 1 times [2021-12-14 17:03:36,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:03:36,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163829833] [2021-12-14 17:03:36,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:36,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:03:37,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:37,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:03:37,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:37,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:03:37,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:37,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:03:37,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:37,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-14 17:03:37,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:37,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-14 17:03:37,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:37,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 17:03:37,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:37,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 17:03:37,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:37,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:37,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:37,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-14 17:03:37,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:37,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-14 17:03:37,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:37,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-14 17:03:37,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:37,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-14 17:03:37,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:37,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-14 17:03:37,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:37,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-14 17:03:37,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:37,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-14 17:03:37,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:37,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-14 17:03:37,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:37,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-14 17:03:37,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:37,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:37,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:37,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 17:03:37,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:37,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-12-14 17:03:37,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:37,314 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-12-14 17:03:37,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:03:37,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163829833] [2021-12-14 17:03:37,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163829833] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:03:37,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312400374] [2021-12-14 17:03:37,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:37,315 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:03:37,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:03:37,317 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:03:37,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-14 17:03:37,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:37,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 2858 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-14 17:03:37,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:03:38,125 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-12-14 17:03:38,126 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:03:38,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312400374] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:03:38,126 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:03:38,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 12 [2021-12-14 17:03:38,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179006799] [2021-12-14 17:03:38,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:03:38,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 17:03:38,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:03:38,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 17:03:38,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-12-14 17:03:38,129 INFO L87 Difference]: Start difference. First operand 339 states and 462 transitions. Second operand has 9 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-12-14 17:03:38,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:03:38,267 INFO L93 Difference]: Finished difference Result 553 states and 751 transitions. [2021-12-14 17:03:38,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 17:03:38,267 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 163 [2021-12-14 17:03:38,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:03:38,270 INFO L225 Difference]: With dead ends: 553 [2021-12-14 17:03:38,270 INFO L226 Difference]: Without dead ends: 344 [2021-12-14 17:03:38,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-12-14 17:03:38,274 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 12 mSDsluCounter, 1331 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1529 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:03:38,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1529 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 17:03:38,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-12-14 17:03:38,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 344. [2021-12-14 17:03:38,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 227 states have (on average 1.145374449339207) internal successors, (260), 232 states have internal predecessors, (260), 90 states have call successors, (90), 23 states have call predecessors, (90), 26 states have return successors, (119), 88 states have call predecessors, (119), 89 states have call successors, (119) [2021-12-14 17:03:38,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 469 transitions. [2021-12-14 17:03:38,296 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 469 transitions. Word has length 163 [2021-12-14 17:03:38,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:03:38,298 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 469 transitions. [2021-12-14 17:03:38,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-12-14 17:03:38,298 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 469 transitions. [2021-12-14 17:03:38,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-12-14 17:03:38,300 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:03:38,300 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:03:38,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-14 17:03:38,523 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,SelfDestructingSolverStorable14 [2021-12-14 17:03:38,523 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:03:38,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:03:38,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1652705169, now seen corresponding path program 1 times [2021-12-14 17:03:38,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:03:38,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225927760] [2021-12-14 17:03:38,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:38,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:03:38,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:38,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:03:38,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:38,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:03:38,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:38,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:03:38,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:38,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 17:03:38,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:38,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-14 17:03:38,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:38,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 17:03:38,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:38,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 17:03:38,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:38,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:38,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:38,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-14 17:03:38,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:38,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-14 17:03:38,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:38,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 17:03:38,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:38,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-14 17:03:38,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:38,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-14 17:03:38,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:38,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-14 17:03:38,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:38,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-14 17:03:38,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:38,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-14 17:03:38,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:38,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-14 17:03:38,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:38,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:38,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:38,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 17:03:38,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:38,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-12-14 17:03:38,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:38,908 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-12-14 17:03:38,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:03:38,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225927760] [2021-12-14 17:03:38,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225927760] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:03:38,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380967643] [2021-12-14 17:03:38,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:38,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:03:38,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:03:38,912 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:03:38,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-14 17:03:39,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:39,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 2863 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 17:03:39,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:03:39,711 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-12-14 17:03:39,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:03:39,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380967643] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:03:39,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:03:39,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2021-12-14 17:03:39,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65695340] [2021-12-14 17:03:39,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:03:39,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 17:03:39,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:03:39,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 17:03:39,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-12-14 17:03:39,714 INFO L87 Difference]: Start difference. First operand 344 states and 469 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-12-14 17:03:39,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:03:39,880 INFO L93 Difference]: Finished difference Result 558 states and 761 transitions. [2021-12-14 17:03:39,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 17:03:39,881 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 165 [2021-12-14 17:03:39,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:03:39,883 INFO L225 Difference]: With dead ends: 558 [2021-12-14 17:03:39,883 INFO L226 Difference]: Without dead ends: 344 [2021-12-14 17:03:39,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-12-14 17:03:39,885 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 17 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:03:39,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 706 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2021-12-14 17:03:39,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-12-14 17:03:39,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 344. [2021-12-14 17:03:39,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 227 states have (on average 1.1409691629955947) internal successors, (259), 232 states have internal predecessors, (259), 90 states have call successors, (90), 23 states have call predecessors, (90), 26 states have return successors, (119), 88 states have call predecessors, (119), 89 states have call successors, (119) [2021-12-14 17:03:39,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 468 transitions. [2021-12-14 17:03:39,905 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 468 transitions. Word has length 165 [2021-12-14 17:03:39,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:03:39,905 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 468 transitions. [2021-12-14 17:03:39,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-12-14 17:03:39,906 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 468 transitions. [2021-12-14 17:03:39,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-12-14 17:03:39,908 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:03:39,908 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:03:39,933 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-14 17:03:40,127 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 [2021-12-14 17:03:40,127 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:03:40,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:03:40,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1112275663, now seen corresponding path program 1 times [2021-12-14 17:03:40,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:03:40,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655229332] [2021-12-14 17:03:40,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:40,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:03:40,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:40,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:03:40,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:40,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:03:40,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:40,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:03:40,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:40,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 17:03:40,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:40,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-14 17:03:40,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:40,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 17:03:40,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:40,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 17:03:40,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:40,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:40,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:40,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-14 17:03:40,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:40,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-14 17:03:40,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:40,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 17:03:40,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:40,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-14 17:03:40,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:40,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-14 17:03:40,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:40,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-14 17:03:40,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:40,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-14 17:03:40,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:40,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-14 17:03:40,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:40,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-14 17:03:40,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:40,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:40,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:40,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 17:03:40,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:40,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-12-14 17:03:40,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:40,460 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-12-14 17:03:40,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:03:40,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655229332] [2021-12-14 17:03:40,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655229332] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:03:40,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172995217] [2021-12-14 17:03:40,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:40,461 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:03:40,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:03:40,464 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:03:40,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-14 17:03:40,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:40,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 2868 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-14 17:03:40,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:03:41,102 INFO L388 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 [2021-12-14 17:03:41,791 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 147 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-14 17:03:41,791 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:03:41,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172995217] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:03:41,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:03:41,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [11] total 24 [2021-12-14 17:03:41,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126644382] [2021-12-14 17:03:41,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:03:41,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-14 17:03:41,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:03:41,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-14 17:03:41,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-12-14 17:03:41,793 INFO L87 Difference]: Start difference. First operand 344 states and 468 transitions. Second operand has 15 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 7 states have call successors, (21), 4 states have call predecessors, (21), 6 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2021-12-14 17:03:42,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:03:42,582 INFO L93 Difference]: Finished difference Result 648 states and 914 transitions. [2021-12-14 17:03:42,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-14 17:03:42,583 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 7 states have call successors, (21), 4 states have call predecessors, (21), 6 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 165 [2021-12-14 17:03:42,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:03:42,586 INFO L225 Difference]: With dead ends: 648 [2021-12-14 17:03:42,586 INFO L226 Difference]: Without dead ends: 509 [2021-12-14 17:03:42,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 184 SyntacticMatches, 8 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-12-14 17:03:42,588 INFO L933 BasicCegarLoop]: 332 mSDtfsCounter, 131 mSDsluCounter, 1802 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 2134 SdHoareTripleChecker+Invalid, 1462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 444 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 17:03:42,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 2134 Invalid, 1462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 962 Invalid, 0 Unknown, 444 Unchecked, 0.7s Time] [2021-12-14 17:03:42,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-12-14 17:03:42,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 390. [2021-12-14 17:03:42,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 266 states have (on average 1.150375939849624) internal successors, (306), 271 states have internal predecessors, (306), 94 states have call successors, (94), 26 states have call predecessors, (94), 29 states have return successors, (123), 92 states have call predecessors, (123), 93 states have call successors, (123) [2021-12-14 17:03:42,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 523 transitions. [2021-12-14 17:03:42,613 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 523 transitions. Word has length 165 [2021-12-14 17:03:42,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:03:42,613 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 523 transitions. [2021-12-14 17:03:42,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 7 states have call successors, (21), 4 states have call predecessors, (21), 6 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2021-12-14 17:03:42,614 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 523 transitions. [2021-12-14 17:03:42,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-12-14 17:03:42,615 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:03:42,616 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:03:42,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-14 17:03:42,835 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 [2021-12-14 17:03:42,835 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:03:42,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:03:42,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1057882765, now seen corresponding path program 1 times [2021-12-14 17:03:42,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:03:42,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571436090] [2021-12-14 17:03:42,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:42,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:03:42,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:43,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:03:43,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:43,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:03:43,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:43,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:03:43,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:43,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 17:03:43,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:43,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-14 17:03:43,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:43,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 17:03:43,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:43,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 17:03:43,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:43,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:43,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:43,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-14 17:03:43,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:43,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-14 17:03:43,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:43,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 17:03:43,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:43,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-14 17:03:43,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:43,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-14 17:03:43,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:43,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-14 17:03:43,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:43,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-14 17:03:43,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:43,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-14 17:03:43,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:43,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-14 17:03:43,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:43,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:43,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:43,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 17:03:43,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:43,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-12-14 17:03:43,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:43,208 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-12-14 17:03:43,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:03:43,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571436090] [2021-12-14 17:03:43,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571436090] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:03:43,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902611885] [2021-12-14 17:03:43,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:43,209 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:03:43,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:03:43,210 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) [2021-12-14 17:03:43,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-14 17:03:43,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:43,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 2863 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 17:03:43,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:03:43,953 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-14 17:03:43,953 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:03:43,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902611885] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:03:43,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:03:43,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 13 [2021-12-14 17:03:43,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246829526] [2021-12-14 17:03:43,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:03:43,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:03:43,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:03:43,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:03:43,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-12-14 17:03:43,955 INFO L87 Difference]: Start difference. First operand 390 states and 523 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-12-14 17:03:44,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:03:44,073 INFO L93 Difference]: Finished difference Result 650 states and 875 transitions. [2021-12-14 17:03:44,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 17:03:44,073 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 165 [2021-12-14 17:03:44,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:03:44,076 INFO L225 Difference]: With dead ends: 650 [2021-12-14 17:03:44,076 INFO L226 Difference]: Without dead ends: 390 [2021-12-14 17:03:44,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-12-14 17:03:44,078 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 3 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:03:44,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 536 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2021-12-14 17:03:44,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-12-14 17:03:44,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2021-12-14 17:03:44,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 266 states have (on average 1.1428571428571428) internal successors, (304), 271 states have internal predecessors, (304), 94 states have call successors, (94), 26 states have call predecessors, (94), 29 states have return successors, (122), 92 states have call predecessors, (122), 93 states have call successors, (122) [2021-12-14 17:03:44,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 520 transitions. [2021-12-14 17:03:44,098 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 520 transitions. Word has length 165 [2021-12-14 17:03:44,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:03:44,099 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 520 transitions. [2021-12-14 17:03:44,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-12-14 17:03:44,099 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 520 transitions. [2021-12-14 17:03:44,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-14 17:03:44,101 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:03:44,101 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:03:44,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-14 17:03:44,315 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 [2021-12-14 17:03:44,315 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:03:44,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:03:44,316 INFO L85 PathProgramCache]: Analyzing trace with hash -821296096, now seen corresponding path program 1 times [2021-12-14 17:03:44,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:03:44,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107843078] [2021-12-14 17:03:44,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:44,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:03:44,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:44,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:03:44,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:44,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:03:44,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:44,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:03:44,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:44,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:03:44,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:44,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-14 17:03:44,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:44,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-14 17:03:44,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:44,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 17:03:44,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:44,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:44,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:44,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-14 17:03:44,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:44,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-14 17:03:44,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:44,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-14 17:03:44,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:45,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 17:03:45,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:45,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:03:45,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:45,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-14 17:03:45,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:45,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-14 17:03:45,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:45,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-14 17:03:45,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:45,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-14 17:03:45,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:45,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-12-14 17:03:45,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:45,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:45,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:45,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 17:03:45,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:45,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-14 17:03:45,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:45,376 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2021-12-14 17:03:45,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:03:45,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107843078] [2021-12-14 17:03:45,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107843078] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:03:45,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083967058] [2021-12-14 17:03:45,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:45,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:03:45,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:03:45,378 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) [2021-12-14 17:03:45,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-14 17:03:45,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:45,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 2891 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-14 17:03:45,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:03:46,153 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-12-14 17:03:46,153 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:03:46,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083967058] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:03:46,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:03:46,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [28] total 35 [2021-12-14 17:03:46,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903453044] [2021-12-14 17:03:46,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:03:46,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 17:03:46,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:03:46,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 17:03:46,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1093, Unknown=0, NotChecked=0, Total=1190 [2021-12-14 17:03:46,155 INFO L87 Difference]: Start difference. First operand 390 states and 520 transitions. Second operand has 9 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 3 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-12-14 17:03:46,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:03:46,312 INFO L93 Difference]: Finished difference Result 544 states and 712 transitions. [2021-12-14 17:03:46,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 17:03:46,312 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 3 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 166 [2021-12-14 17:03:46,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:03:46,314 INFO L225 Difference]: With dead ends: 544 [2021-12-14 17:03:46,315 INFO L226 Difference]: Without dead ends: 367 [2021-12-14 17:03:46,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=113, Invalid=1293, Unknown=0, NotChecked=0, Total=1406 [2021-12-14 17:03:46,316 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 10 mSDsluCounter, 1301 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1494 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:03:46,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 1494 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 17:03:46,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-12-14 17:03:46,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 367. [2021-12-14 17:03:46,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 247 states have (on average 1.1295546558704452) internal successors, (279), 251 states have internal predecessors, (279), 92 states have call successors, (92), 25 states have call predecessors, (92), 27 states have return successors, (116), 90 states have call predecessors, (116), 91 states have call successors, (116) [2021-12-14 17:03:46,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 487 transitions. [2021-12-14 17:03:46,335 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 487 transitions. Word has length 166 [2021-12-14 17:03:46,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:03:46,335 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 487 transitions. [2021-12-14 17:03:46,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 3 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-12-14 17:03:46,335 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 487 transitions. [2021-12-14 17:03:46,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-14 17:03:46,337 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:03:46,337 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:03:46,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-14 17:03:46,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:03:46,560 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:03:46,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:03:46,560 INFO L85 PathProgramCache]: Analyzing trace with hash 48870262, now seen corresponding path program 2 times [2021-12-14 17:03:46,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:03:46,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375193766] [2021-12-14 17:03:46,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:46,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:03:46,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:46,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:03:46,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:46,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:03:46,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:46,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:03:46,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:47,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 17:03:47,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:47,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-14 17:03:47,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:47,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 17:03:47,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:47,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 17:03:47,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:47,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:47,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:47,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-14 17:03:47,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:47,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-14 17:03:47,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:47,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 17:03:47,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:47,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-14 17:03:47,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:47,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-14 17:03:47,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:47,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-14 17:03:47,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:47,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-14 17:03:47,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:47,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-12-14 17:03:47,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:47,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-14 17:03:47,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:47,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:47,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:47,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 17:03:47,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:47,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-14 17:03:47,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:47,236 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-12-14 17:03:47,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:03:47,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375193766] [2021-12-14 17:03:47,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375193766] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:03:47,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728356320] [2021-12-14 17:03:47,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 17:03:47,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:03:47,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:03:47,238 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:03:47,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-14 17:03:48,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 17:03:48,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 17:03:48,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 2878 conjuncts, 83 conjunts are in the unsatisfiable core [2021-12-14 17:03:48,460 INFO L286 TraceCheckSpWp]: Computing forward predicates...